Leg : 61 Top/Bottom Interval(mm): 550/ 0 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 559.05 Sect/Pc #: 1/PCE 1A
ROCK = PLAG-CPX-OPX MODERATELY PHYRIC BASALT
HIGHLY ALTERED,SEQUENCE OF ALTERATION IS 1)CLAY
MINS + CHLORITE 2)CALCITE 3)ZEOLITES;
Texture: MODERATELY PORPHYRITIC,VARIOLITIC-HYALOPILITIC;
Where sampled: CHILL MARGIN OF SILL*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.3-0.5 Morphology: EUHEDRAL
PSEUDOMORPH,REPLACED BY FE SMEC + IDDINGSITE;
PLAGIOCLASE ( 1.5%)
Size(mm): 0.3-1.0 Morphology: SKELETAL,EUHEDRAL
APPROX COMP AN70,OFTEN REPLACED BY CALCITE;
CLINOPYROXENE ( 1%)
Size(mm): 0.3-0.5 Morphology: EUHEDRAL
CLEAR IN COLOR (FRESH);
SPINEL ( 0%)
Groundmass - PLAGIOCLASE ( 5%)
MICROLITES AND MICROPHENOS;
CLINOPYROXENE
QUENCH SPHERULITES;
MAGNETITE ( 10%)
FINE GRAINED DUST;
GLASS
ALTERED;
MICROCRYST GROUNDMASS
MESOSTASIS*
Alteration - CALCITE
Location: VEINS Replacing: PLAG,GROUNDMASS
PERCENTAGE VARIABLE;
CLAY MINERALS
Location: VEINS Replacing: OL,PLAG,GROUNDMASS
PERCENTAGE VARIABLE,OL REPLACED BY IDDINGS + SMEC;
ZEOLITE
Location: VEINS Replacing: CLAY.MINS,CHLORITE,CARB
PERCENTAGE VARIABLE,REPLACES PREVIOUS ALTERATION
PRODUCTS,HIGH RELIEF,ACICULAR,BIREFRINGENCE=0.03,
R>V,2VX 20;
CHLORITE
Location: VEINS Replacing: PLAG,GROUNDMASS
PERCENTAGE VARIABLE,SEQUENCE OF ALTERATION IS 1)
CLAY + CHLORITE 2)CALCITE 3)ZEOLITES;
IDDINGSITE
Replacing: OL
Vesicles -
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 900/ 920 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 559.41 Sect/Pc #: 1/PCE 1B
ROCK = PLAG-CPX PHYRIC BASALT
HIGHLY ALTERED;
Texture: PORPHYRITIC,INTERSERTAL;
Where sampled: SILL INTERIOR
QUESTIONABLE*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): 0.3-1.0
APPROX COMP AN65,PHENOCRYSTS AND MICROPHENOCRYSTS;
CLINOPYROXENE ( 10%)
Size(mm): 0.2-1.0
MICROPHENOCRYSTS,CLEAR TO LIGHT BROWN,FRESH*
Groundmass - PLAGIOCLASE ( 8%)
Size(mm): 0.03
CLINOPYROXENE ( 8%)
Size(mm): 0.03
MAGNETITE ( 12%)
GLASS ( 48%)
MESOSTASIS,HEAVILY REPLACED BY CLAY*
Alteration - CLAY MINERALS
Location: VEINS Replacing: OL,GROUNDMASS
PERCENTAGE VARIABLE,GREEN (FE RICH)*
Leg : 61 Top/Bottom Interval(mm): 1250/1270 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 559.76 Sect/Pc #: 1/PCE 4
ROCK = APHYRIC BASALT
HEAVILY ALTERED;
Texture: APHYRIC,INTERSERTAL;
Where sampled: SILL INTERIOR
AT VEIN*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5
IDENTITY UNCERTAIN,PSEUDOMORPHS (CLAY)*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 15%)
Size(mm): 0.01-0.05
CLINOPYROXENE ( 10%)
Size(mm): 0.01-0.05
MAGNETITE ( 10%)
Size(mm): 0.01-0.05
GLASS ( 65%)
ALTERED MESOSTASIS AND XTLS;
OTHER
DARK MATERIAL,FE-MN OXIDES + HYDROXIDES?*
Alteration - CLAY MINERALS
Location: VEINS,PATCHES Replacing: PLAG,GROUNDMASS,OL
ZEOLITE
Location: VEINS,PATCHES Replacing: PLAG,GROUNDMASS,CPX
PERCENTAGE VARIABLE;
CHLORITE
Replacing: PLAG,GROUNDMASS,CPX
PERCENTAGE VARIABLE*
Leg : 61 Top/Bottom Interval(mm): 210/ 230 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 560.22 Sect/Pc #: 2/PCE 2
ROCK = PLAG-CPX-OL MODERATELY PHYRIC BASALT
ALTERED,SEQUENCE OF ALTERATION IS 1)CALCITE 2)
GREEN CLAY 3)ZEOLITE + CHLORITE;
Texture: MODERATELY PORPHYRITIC,SPHERULITIC-INTERSERTAL;
Where sampled: CALCITE VEIN WITHIN SILL*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5
PSEUDOMORPHS AFTER GREENISH BROWN CLAY;
PLAGIOCLASE ( 2%)
Size(mm): 0.3-0.6
APPROX COMP AN68;
CLINOPYROXENE ( 1%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL
AUGITE*
Groundmass - PLAGIOCLASE ( 14%)
CLINOPYROXENE ( 38%)
MAGNETITE ( 19%)
GLASS
MESOSTASIS ALTERED TO SMEC*
Alteration - CALCITE
Location: VEIN
PERCENTAGE VARIABLE;
CLAY MINERALS
Location: VEIN
PERCENTAGE VARIABLE,MESOSTASIS ALTERED TO SMEC;
ZEOLITE
Location: VEIN
PERCENTAGE VARIABLE;
CHLORITE
SEQUENCE OF ALTERATION IS 1)CALCITE 2)GREEN
CLAY 3)ZEOLITES + CHLORITE*
Leg : 61 Top/Bottom Interval(mm): 530/ 570 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 560.55 Sect/Pc #: 2/PCE 3B
ROCK = DOLERITE
ALTERED,TYPICAL DOLERITE IN MOST PARTS;
Texture: EQUIGRANULAR-MICRODIABASIC;
Where sampled: SILL INTERIOR*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 35%)
Size(mm): 0.2-1.0
APPROX COMP AN68 BY A-NORMAL;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.4
MAGNETITE ( 10%)
Size(mm): 0.01-0.1
Alteration - CLAY MINERALS ( 20%)
Location: VUGS Replacing: CPX,PLAG
FOUND IN DIKTYTAXITIC VUGS,BROWN IN COLOR*
Leg : 61 Top/Bottom Interval(mm): 1030/1070 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 561.05 Sect/Pc #: 2/PCE 6
ROCK = PLAG-CPX MODERATELY PHYRIC BASALT
ALTERED;
Texture: MODERATELY PORPHYRITIC,HYALOPILITIC,SPHERULITIC,
VARIOLITIC
VARIABLE;
Where sampled: SILL INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 0.5-0.7
APPROX COMP AN73;
CLINOPYROXENE ( 1%)
Size(mm): 0.2-0.5 Morphology: SKELETAL,EUHEDRAL
AUGITE*
Groundmass - PLAGIOCLASE ( 15%)
CLINOPYROXENE ( 15%)
OPAQUE MINERALS ( 10%)
INCLUDES MAGN + ILMENITE;
GLASS ( 60%)
ALTERED MESOSTASIS (BROWN + GREEN CLAYS)*
Alteration - ZEOLITE
Location: VEINS
SMECTITE
Location: VEINS
GREEN SMEC,NONTRONITE;
CHLORITE
Location: VEINS
OTHER
Location: VEINS
FE HYDROXIDES AND OXIDES*
Leg : 61 Top/Bottom Interval(mm): 1350/1390 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 561.37 Sect/Pc #: 2/PCE 9
ROCK = CPX-PLAG-OL-SPINEL MODERATELY PHYRIC BASALT
ALTERED;
Texture: MODERATELY PORPHYRITIC,HYALOPILITIC,
GLOMEROPHYRIC*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.3-0.5
PSEUDOMORPHS AFTER SMEC (BROWNISH GREEN);
PLAGIOCLASE ( 1%)
Size(mm): 0.3-0.7
APPROX COMP AN80;
CLINOPYROXENE ( 2%)
Size(mm): 0.2-0.4
AUGITE;
SPINEL ( <1%)
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): <0.02-0.1
CLINOPYROXENE ( 38%)
Size(mm): <0.02-0.1
QUENCH PHASE;
OPAQUE MINERALS ( 19%)
Size(mm): <0.02-0.1
INCLUDES MAGN + ILMENITE;
GLASS ( 29%)
MOSTLY ALTERED TO CLAY*
Alteration - ZEOLITE
Replacing: PLAG
CHLORITE
Replacing: PLAG
CLAY MINERALS
Replacing: OL,GLASS
OL IS PSEUDOMORPHED BY BROWNISH GREEN SMEC*
Leg : 61 Top/Bottom Interval(mm): 340/ 360 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 561.85 Sect/Pc #: 3/PCE 4
ROCK = PLAG-CPX-OL MODERATELY PHYRIC BASALT
HEAVILY ALTERED;
Texture: MODERATELY PORPHYRITIC,VARIOLITIC;
Where sampled: INTERIOR OF SILL*
Phenocrysts- OLIVINE ( <1%)
PSEUDOMORPHS,IDDINGSITE;
PLAGIOCLASE ( 1-2%)
Size(mm): 0.3-0.6
APPROX COMP AN80,ONE LARGE MEGACRYST;
CLINOPYROXENE ( 1%)
Size(mm): 0.2-0.4 Morphology: EUHEDRAL
AUGITE;
SPINEL ( TR%)
Size(mm): 0.01
PICOTITE,INCLUSION IN OLIVINE PSEUDOMORPH*
Groundmass - PLAGIOCLASE ( 1%)
MICROLITES;
GLASS ( 95%)
ALMOST TOTALLY ALTERED TO CLAY*
Alteration - IDDINGSITE
Replacing: OL
CLAY MINERALS
Location: GROUNDMASS
DOMINANT GROUNDMASS ALTERATION;
ZEOLITE
Location: VEINS IN
Location: GROUNDMASS
Leg : 61 Top/Bottom Interval(mm): 340/ 360 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 561.85 Sect/Pc #: 3/PCE 4
ROCK = PLAG-OL MICROPHYRIC BASALT;
Texture: MICROPHYRIC,VARIOLITIC;
Where sampled: SILL*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.1-0.2 Morphology: EQUIDIMENSIONAL
SMECTITE PSEUDOMORPHS,MICROPHENOS;
PLAGIOCLASE ( 15%)
Size(mm): 0.02-0.6 Morphology: ELONGATE,TABULAR
APPROX COMP AN70-75,SINGLE GRAINS,XENOCRYST
(5 MM),MICROPHENOS;
CLINOPYROXENE ( TR%)
Size(mm): 0.1 Morphology: ROUNDED
MICROPHENOS;
SPINEL ( 0%)
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 5%)
Size(mm): <0.02
SMALL MICROLITES;
CLINOPYROXENE ( TR%)
Size(mm): <0.02
DISSEMINATED GRAINS;
MAGNETITE ( TR%)
DUST-LIKE;
ILMENITE
IDENTITY AND/OR PERCENTAGE UNCERTAIN;
GLASS ( 78%)
VARIOLITIC AGGREGATES;
ORTHOPYROXENE ( 0%)
QUARTZ ( 0%)
ALKALI FELDSPAR ( 0%)
Alteration - CARBONATE ( 0%)
CLAY MINERALS
Location: INNER PARTS Replacing: CHLORITE,GLASS,OL
Location: OF CHLOR VEIN
REDDISH BROWN,OL REPLACED BY SMEC PSEUDOMORPHS,
PERCENTAGE VARIABLE;
ZEOLITE
Location: VEINS
CHLORITE
Location: VEINS Replacing: ALL.MINS
PALE GREENISH*
Vesicles -
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 660/ 690 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 562.17 Sect/Pc #: 3/PCE 7
ROCK = PLAG-OL MICROPHYRIC BASALT
ENRICHED IN PLAG OL AND GLASS ZONE;
Texture: MICROPHYRIC,VARIOLITIC;
Where sampled: SILL*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.2-0.6 Morphology: EUHEDRAL
MICROPHENOS,ALTERED TO SMEC;
PLAGIOCLASE ( 8%)
Size(mm): 0.2-2.0 Morphology: ELONGATE,TABULAR
MICROPHENOS,APPROX COMP AN72-80,MARGINAL RIMS
MORE ACIDIC;
CLINOPYROXENE ( TR%)
MICROPHENOS*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 9%)
Size(mm): <0.2
APPROX COMP AN75,MICROLITES;
CLINOPYROXENE ( 27%)
Size(mm): <0.05
PERCENTAGE UNCERTAIN,DISSEMINATED GRAINS AND
STELLATED AGGREGATES;
MAGNETITE ( 1%)
Size(mm): <0.02
DUST-LIKE;
ILMENITE
IDENTITY AND/OR PERCENTAGE UNCERTAIN;
GLASS ( 53%)
INTERSTITIAL,REPLACED PARTLY BY BROWN SMEC;
ORTHOPYROXENE ( 0%)
QUARTZ ( 0%)
ALKALI FELDSPAR ( 0%)
Alteration - SMECTITE ( 70%)
Replacing: GLASS,OL
ONLY IN ZONE ENRICHED IN PLAG OL AND GLASS,BROWN
SMEC REPLACES GLASS;
CHLORITE
Location: VEIN Replacing: ALL.MINS,GLASS
LIGHT GREENISH;
CARBONATE ( 0%)
ZEOLITE ( 0%)
Vesicles -
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 970/1020 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 562.49 Sect/Pc #: 3/PCE 11
ROCK = PLAG-CPX-OL MICROPHYRIC BASALT;
Texture: MICROPHYRIC,HYALOPILITIC-VARIOLITIC;
Where sampled: SILL*
Phenocrysts- OLIVINE
Size(mm): 0.1-0.2 Morphology: EQUIDIMENSIONAL
MICROPHENOS,PERCENTAGE QUESTIONABLE,SMECTITE
PSEUDOMORPHS;
PLAGIOCLASE ( 15%)
Size(mm): 0.04-1.0 Morphology: ELONGATE,TABULAR
MICROPHENOS,APPROX COMP AN55-65,GLOMEROPHYRIC
AGGREGATES;
CLINOPYROXENE ( 5%)
Size(mm): 0.2-0.4 Morphology: EQUIDIMENSIONAL,ROUND
MICROPHENOS,DISSEMINATED XTLS;
SPINEL ( 0%)
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 8%)
Size(mm): <0.2-0.06
SMALL MICROLITES,ZONATION DISTINCT;
CLINOPYROXENE ( 2%)
Size(mm): <0.04 Morphology: ROUNDED
DISSEMINATED GRAINS,STELLATED AGGREGATES;
MAGNETITE ( 16%)
Size(mm): <0.04
DUST-LIKE;
ILMENITE
PERCENTAGE AND/OR IDENTITY QUESTIONABLE;
GLASS ( 54%)
ALTERED TO REDDISH BROWN SMECTITE;
ORTHOPYROXENE ( 0%)
QUARTZ ( 0%)
ALKALI FELDSPAR ( 0%)
Alteration - CARBONATE ( 0%)
SMECTITE ( 70%)
Replacing: GLASS,PLAG,OL
INTERSTITIAL,FE-RICH SAPONITE,REDDISH BROWN SMEC
REPLACES GLASS;
ZEOLITE ( 0%)
Leg : 61 Top/Bottom Interval(mm): 1080/1130 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 558.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 562.60 Sect/Pc #: 3/PCE 12
ROCK = PLAG-CPX-OL MODERATELY MICROPHYRIC BASALT;
Texture: MICROPHYRIC,INTERSERTAL;
Where sampled: SILL*
Phenocrysts- OLIVINE
Size(mm): 0.1-0.4 Morphology: EQUIDIMENSIONAL
PERCENTAGE UNCERTAIN,PSEUDOMORPHS OF SMEC,
MICROPHENOS;
PLAGIOCLASE ( 2%)
Size(mm): 0.5-2.0 Morphology: ELONGATE,TABULAR
MICROPHENOS,APPROX COMP AN42-65,OFTEN GLOMEROMORPH
AGGREGATES;
CLINOPYROXENE ( 1%)
Size(mm): 0.2-0.5 Morphology: EQUIDIMENSIONAL
MICROPHENOS,ZONED,DISSEMINATED XTLS;
SPINEL ( 0%)
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 29%)
Size(mm): <0.5
APPROX COMP AN45-60,MICROLITES,MORE ACID MARGINS;
CLINOPYROXENE ( 15%)
Size(mm): <0.2 Morphology: INTERSERTAL,ROUND
MAGNETITE ( 19%)
Size(mm): <0.4
DUST-LIKE DISSEMINATED GRAINS;
ILMENITE
PERCENTAGE AND/OR IDENTITY QUESTIONABLE;
GLASS ( 34%)
INTERSTITIAL,ALTERED TO SMEC
ORTHOPYROXENE ( 0%)
QUARTZ ( 0%)
ALKALI FELDSPAR ( 0%)
Alteration - CARBONATE ( 0%)
SMECTITE ( 40%)
Replacing: GLASS,OL
FE-RICH;
ZEOLITE ( 0%)
CHLORITE ( 5%)
Replacing: PLAG
REPLACES PLAG IN GLOMEROPORPHYRITIC AGGREGATES*
Vesicles -
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 1050/1080 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 567.50 Rock Type: IGNEOUS
Core: 61 Sample Midpoint(m) : 568.57 Sect/Pc #: 1/PCE 10
ROCK = DOLERITE
ALTERED,ROCK CONTAINS CLOTS (2-4 MM) OF
HYALOPILITIC ALTERED BASALT;
Texture: DIABASIC;
Where sampled: SILL*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.4-0.5
PSEUDOMORPHS,GREEN CLAY;
PLAGIOCLASE ( <1%)
Size(mm): 0.5-1.0
ZONED--APPROX COMP AN60 TO AN30 AT RIMS;
CLINOPYROXENE ( <1%)
Size(mm): 0.1-0.2
AUGITE,2VZ 65;
SPINEL ( TR%)
Size(mm): 0.04
INCLUSIONS IN OL ONLY*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 49%)
Size(mm): 0.2-0.4
CLINOPYROXENE ( 44%)
Size(mm): 0.07-0.1
OPAQUE MINERALS ( 5%)
Size(mm): 0.4 Morphology: EUHEDRAL
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS ( 10%)
Location: GROUNDMASS Replacing: CPX,PLAG,OL
Leg : 61 Top/Bottom Interval(mm): 530/ 560 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 567.50 Rock Type: IGNEOUS
Core: 61 Sample Midpoint(m) : 569.55 Sect/Pc #: 2/PCE 5
ROCK = DOLERITE
ALTERED;
Texture: DIABASIC;
Where sampled: SILL*
Phenocrysts- OLIVINE
PERHAPS SOME PSEUDOMORPHS?;
PLAGIOCLASE ( <1%)
Size(mm): 0.5-1.0
APPROX COMP AN70;
CLINOPYROXENE ( 0%)
SPINEL ( 0%)
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.3-0.5
APPROX COMP AN60 ZONED TO AN40;
CLINOPYROXENE ( 40%)
Size(mm): 0.1-0.4
AUGITE,2VZ 60;
OPAQUE MINERALS ( 5%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS ( 20%)
Replacing: CPX,OL,PLAG
BROWNISH*
Leg : 61 Top/Bottom Interval(mm): 790/ 810 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 576.50 Rock Type: IGNEOUS
Core: 62 Sample Midpoint(m) : 577.30 Sect/Pc #: 1/PCE 7
ROCK = DOLERITE
ALTERED;
Texture: DIABASIC*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.3-0.5
BROWNISH ORANGE CLAY PSEUDOMORPHS;
PLAGIOCLASE ( <1%)
Size(mm): 0.5-1.0
APPROX COMP AN80 ZONED TO AN50*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.5-0.8
APPROX COMP AN75 ZONED TO AN40;
CLINOPYROXENE ( 55%)
Size(mm): 0.3-0.5
MAGNETITE ( 5%)
Size(mm): 0.05-0.2 Morphology: EUHEDRAL
TI-MAGN*
Alteration - CLAY MINERALS ( 10%)
Replacing: PLAG,CPX,OL
OL REPLACED BY BROWNISH ORANGE PSEUDOMORPHS*
Leg : 61 Top/Bottom Interval(mm): 1270/1290 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 576.50 Rock Type: IGNEOUS
Core: 62 Sample Midpoint(m) : 577.78 Sect/Pc #: 1/PCE 10
ROCK = APHYRIC BASALT
ALTERED;
Texture: APHYRIC,VARIOLITIC*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.06-0.08
PSEUDOMORPHS (GREEN CLAY);
PLAGIOCLASE ( <1%)
Size(mm): 0.2-0.4
APPROX COMP AN74;
CLINOPYROXENE ( <1%)
Size(mm): 0.08-0.2
AUGITE,LIGHT BROWN WITH GLASS INCLUSIONS,REPLACED
BY CHLORITE*
Groundmass - CLINOPYROXENE
A GREAT DEAL OF QUENCH CPX,REPLACED BY CHLORITE
AND GREEN CLAY;
ILMENITE ( 20%)
Size(mm): 0.003-0.03
QUENCH,"RAILROAD TRACK" TEXTURED,TI MAGN*
Alteration - CLAY MINERALS ( 20%)
Replacing: OL,CPX
GREEN COLOR;
CHLORITE ( 60%)
Location: GROUNDMASS Replacing: PLAG,GLASS INCLUSIONS,
Replacing: VARIOLITIC GROUNDMASS
Leg : 61 Top/Bottom Interval(mm): 260/ 290 Describer: Moberly, R.
Hole: 462 Top of Core Depth(m) : 579.50 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 579.78 Sect/Pc #: 1/
ROCK = ZEOLITIC HYALOCLASTITE
GRAINS WELL SORTED--MOST ARE 25-40 MICRONS (SILT)
BUT RANGE FROM 20-120 MICRONS,COMPOSITION CLAY
PROBABLY AND ALSO ZEOLITIC (AWAIT XRD),ANGULAR
BLOCKY GRAINS ARE TYPICAL OF HYALOCLASTITE AND
SHOW RELICT INTERSERTAL PERLITHIC TEXTURES,
MICROLITES AND CRYSTALITES,NOW REPLACED BY
ZEOLITE AND/OR CLAY,DARK PARTS MAY BE ORIGINAL
OPAQUES OR MAY HAVE MN ADDED;
Texture: HYALOCLASTITIC
3% SAND AND 97% SILT*
Groundmass - FELDSPAR ( 1%)
OPAQUE MINERALS ( 11%)
Alteration - COMBINATION ( 88%)
Replacing: MICROLITES,CRYSTALLITES
CONSISTS OF CLAY AND/OR ZEOLITES,DO NOT KNOW
WHAT PERCENT OF EACH AT THIS POINT--AWAIT XRD*
Leg : 61 Top/Bottom Interval(mm): 640/ 680 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 579.50 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 580.16 Sect/Pc #: 1/PCE 8
ROCK = ALTERED BASALT;
Texture: MODERATELY PORPHYRITIC,HYALOPILITIC,VARIOLITIC;
Where sampled: SILL*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 0.2-0.5
APPROX COMP AN78-AN30;
CLINOPYROXENE ( 2%)
Size(mm): 0.2-0.3
AUGITE*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.1-0.2
APPROX COMP AN60,ZONED;
CLINOPYROXENE
LOTS OF QUENCH TEXTURED CPX BUT REPLACED;
MAGNETITE ( 20%)
Size(mm): 0.01
TI-MAGN?*
Alteration - COMBINATION ( 60%)
Replacing: PLAG,CPX,GROUNDMASS
INTERGROWN CHLORITE + CLAY*
Leg : 61 Top/Bottom Interval(mm): 1320/1360 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 579.50 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 580.84 Sect/Pc #: 1/PCE 9
ROCK = DOLERITE
ALTERED;
Texture: DIABASIC;
Where sampled: SILL*
Phenocrysts- PLAGIOCLASE ( TR%)
Size(mm): 0.8-1.0
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.1-0.5
APPROX COMP AN78 ZONED TO AN60;
CLINOPYROXENE ( 20%)
Size(mm): 0.1-0.2
50% COUNTING THE ALTERED CPX,AUGITE;
MAGNETITE ( 10%)
Size(mm): 0.1-0.3
TI-MAGNETITE*
Alteration - COMBINATION ( 30%)
Replacing: CPX,PLAG
INTERGROWN CLAY + CHLORITE,BROWNISH*
Leg : 61 Top/Bottom Interval(mm): 790/ 830 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 579.50 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 581.81 Sect/Pc #: 2/PCE 5
ROCK = DOLERITE
ALTERED;
Texture: DIABASIC;
Where sampled: SILL*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 0.8-1.1
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.1-0.3
APPROX COMP AN70 ZONED TO AN42;
CLINOPYROXENE ( 20%)
Size(mm): 0.2-0.5
50% COUNTING THE ALTERED CPX,AUGITE,GLOMEROPHYRIC
CLOTS WITH PLAG*
Alteration - COMBINATION ( 40%)
Location: VEINS Replacing: CPX,PLAG
ALTERATION CONSISTS OF BROWNISH CLAY + CHLORITE*
Leg : 61 Top/Bottom Interval(mm): 1190/1220 Describer: Batiza, R.
Hole: 462 Top of Core Depth(m) : 579.50 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 583.71 Sect/Pc #: 3/PCE 7
ROCK = DOLERITE
ALTERED;
Texture: DIABASIC;
Where sampled: SILL*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 0.8-1.1
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .1-0.3
APPROX COMP AN70 ZONED TO AN42;
CLINOPYROXENE ( 20%)
Size(mm): 0.2-0.5
50% COUNTING THE ALTERED CPX,AUGITE,GLOMEROPHYRIC
CLOTS WITH PLAG*
Alteration - COMBINATION ( 40%)
Location: VEINS Replacing: CPX,PLAG
ALTERATION CONSISTS OF BROWNISH CLAY + CHLORITE*
Leg : 61 Top/Bottom Interval(mm): 130/ 150 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 585.50 Rock Type: IGNEOUS
Core: 64 Sample Midpoint(m) : 585.64 Sect/Pc #: 1/PCE 2
ROCK = DOLERITE;
Texture: SUBOPHITIC,MICROLITIC GROUNDMASS;
Where sampled: NEAR MARGIN OF SILL*
Phenocrysts- PLAGIOCLASE ( 5%)
Size(mm): 0.3-0.4 Morphology: SUBHEDRAL-PRISM
MICROPHENOS,APPROX COMP AN55;
CLINOPYROXENE ( 5%)
Size(mm): 0.3-0.4 Morphology: SUBHEDRAL
MICROPHENOS*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.05-0.1
CLINOPYROXENE ( 40%)
Size(mm): 0.03-0.09
MAGNETITE ( 10%)
Size(mm): 0.03-0.1
Alteration - CLAY MINERALS ( 20%)
Replacing: PLAG,PYX
Leg : 61 Top/Bottom Interval(mm): 280/ 300 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 585.50 Rock Type: IGNEOUS
Core: 64 Sample Midpoint(m) : 585.79 Sect/Pc #: 1/PCE 2
ROCK = PLAG-CPX MODERATELY MICROPHYRIC BASALT;
Texture: MODERATELY MICROPHYRIC,HYALOPILITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): 0.2 Morphology: PRISMATIC
MICROPHENOS,APPROX COMP AN55;
CLINOPYROXENE ( 1%)
Size(mm): 0.2 Morphology: SUBHEDRAL
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): >0.05
SPHERULITIC TEXTURE;
CLINOPYROXENE ( 5%)
Size(mm): >0.05 Morphology: PRISMATIC
MAGNETITE ( 5%)
Size(mm): >0.05
GLASS ( 46%)
INTERSTITIAL,ALTERED TO CLAY.MINS*
Alteration - CLAY MINERALS ( 40%)
Replacing: GLASS,PYX
Leg : 61 Top/Bottom Interval(mm): 800/ 820 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 585.50 Rock Type: IGNEOUS
Core: 64 Sample Midpoint(m) : 589.31 Sect/Pc #: 3/PCE 3
ROCK = DOLERITE;
Texture: SUBOPHITIC;
Where sampled: NEAR INTERIOR OF SILL*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.8-1.6
APPROX COMP AN65,A FEW PHENOS THE REST ARE
MICROPHENOS,MAXIMUM SIZE = 4 MM;
CLINOPYROXENE ( 3%)
Size(mm): <0.5 Morphology: SUBHEDRAL
MICROPHENOS*
Groundmass - PLAGIOCLASE ( 43%)
Size(mm): 0.05-0.65 Morphology: SUBHEDRAL
GROUNDMASS TO MICROLITIC;
CLINOPYROXENE ( 40%)
Size(mm): 0.03-0.4 Morphology: PRISM
GROUNDMASS TO MICROLITIC;
MAGNETITE ( 13%)
Size(mm): 0.01-0.2
Alteration - CLAY MINERALS ( 5%)
Location: SPOTS Replacing: PLAG,PYX
Leg : 61 Top/Bottom Interval(mm): 650/ 670 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 585.50 Rock Type: IGNEOUS
Core: 64 Sample Midpoint(m) : 590.66 Sect/Pc #: 4/PCE 2
ROCK = DOLERITE;
Texture: SUBOPHITIC;
Where sampled: TRANSITIONAL ZONE BETWEEN MARGIN AND INTERIOR OF
SILL*
Phenocrysts- PLAGIOCLASE ( 5%)
Size(mm): 0.5-0.7 Morphology: EUHEDRAL-SUBHEDRAL
APPROX COMP AN52;
CLINOPYROXENE ( 5%)
Size(mm): 0.4-0.6 Morphology: SUBHEDRAL
MAGNETITE ( 2%)
Size(mm): 0.4-0.6
TI-MAGN*
Groundmass - PLAGIOCLASE ( 38%)
Size(mm): <0.15 Morphology: SUBHEDRAL-EUHEDRAL
GROUNDMASS TO MICROLITIC;
CLINOPYROXENE ( 38%)
Size(mm): <0.1 Morphology: SUBHEDRAL
GROUNDMASS TO MICROLITIC;
MAGNETITE ( 12%)
Size(mm): <0.08 Morphology: ANHEDRAL
GROUNDMASS TO MICROLITIC*
Alteration - CLAY MINERALS ( 5-6%)
Location: SPOTS Replacing: PYX,PLAG
Leg : 61 Top/Bottom Interval(mm): 220/ 240 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 594.50 Rock Type: IGNEOUS
Core: 65 Sample Midpoint(m) : 594.73 Sect/Pc #: 1/PCE 1
ROCK = DOLERITE;
Texture: SUBOPHITIC;
Where sampled: NEAR MARGIN OF SILL*
Phenocrysts- PLAGIOCLASE ( 8%)
Size(mm): 0.3-0.6 Morphology: PRISMATIC-SUBHEDRAL
MICROPHENOS,APPROX COMP AN60-33;
CLINOPYROXENE ( 13%)
Size(mm): 0.4-0.7 Morphology: SUBHEDRAL
MICROPHENOS;
MAGNETITE ( 4%)
Size(mm): 0.3-0.4
MICROPHENOS,TI-MAGN*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL
GROUNDMASS TO INTERGRANULAR;
CLINOPYROXENE ( 36%)
Size(mm): 0.03-0.1 Morphology: PRISMATIC
GROUNDMASS TO INTERGRANULAR;
MAGNETITE ( 9%)
Size(mm): 0.03-0.08
QUARTZ
GRANOPHYRIC INTERGROWTHS WITH ALKALI FELDSPAR;
ALKALI FELDSPAR
GRANOPHYRIC INTERGROWTHS WITH QUARTZ*
Alteration - CLAY MINERALS ( 5-6%)
Location: SPOTS Replacing: PYX,PLAG
Leg : 61 Top/Bottom Interval(mm): 1000/1020 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 594.50 Rock Type: IGNEOUS
Core: 65 Sample Midpoint(m) : 595.51 Sect/Pc #: 1/PCE 2F
ROCK = DOLERITE;
Texture: SUBOPHITIC-INTERGRANULAR;
Where sampled: NEAR INTERIOR OF SILL*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): 0.4-0.7 Morphology: PRISMATIC-SUBHEDRAL
MICROPHENOS,APPROX COMP AN60;
CLINOPYROXENE ( 10%)
Size(mm): 0.3-0.7 Morphology: SUBHEDRAL
MICROPHENOS;
MAGNETITE ( 3%)
Size(mm): 0.3-0.4
TI-MAGN*
Groundmass - PLAGIOCLASE ( 33%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL
GROUNDMASS TO INTERSERTAL;
CLINOPYROXENE ( 33%)
Size(mm): 0.03-0.1 Morphology: PRISMATIC
GROUNDMASS TO INTERSERTAL;
MAGNETITE ( 11%)
Size(mm): 0.03-0.08
Alteration - CLAY MINERALS ( 5-6%)
Location: SPOTS Replacing: PYX,PLAG
Leg : 61 Top/Bottom Interval(mm): 200/ 220 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 594.50 Rock Type: IGNEOUS
Core: 65 Sample Midpoint(m) : 596.21 Sect/Pc #: 2/PCE 1A
ROCK = DOLERITE;
Texture: SUBOPHITIC;
Where sampled: NEAR INTERIOR PART OF SILL*
Phenocrysts- PLAGIOCLASE ( 16%)
Size(mm): 0.3-2 Morphology: PRISMATIC-SUBHEDRAL
APPROX COMP AN57,ZONATION IN COARSE GRAINS;
CLINOPYROXENE ( 6%)
Size(mm): 0.4-0.7 Morphology: SUBHEDRAL
MAGNETITE ( 4%)
Size(mm): 0.3-0.4
TI-MAGN*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL
GROUNDMASS TO INTERGRANULAR;
CLINOPYROXENE ( 30%)
Size(mm): 0.03-0.1 Morphology: PRISMATIC
GROUNDMASS TO INTERGRANULAR;
MAGNETITE ( 9%)
Size(mm): 0.03-0.09
QUARTZ
PRESENT*
Alteration - CLAY MINERALS ( 5-6%)
Location: SPOTS Replacing: PYX,PLAG
Leg : 61 Top/Bottom Interval(mm): 1200/1220 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 594.50 Rock Type: IGNEOUS
Core: 65 Sample Midpoint(m) : 597.21 Sect/Pc #: 2/PCE 3
ROCK = DOLERITE;
Texture: SUBOPHITIC;
Where sampled: TRANSITIONAL ZONE BETWEEN MARGIN AND INTERIOR OF
SILL*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 0.3-0.7 Morphology: SUBHEDRAL
MARGIN OF GRAIN IS ALTERED TO IDDINGSITE;
PLAGIOCLASE ( 13%)
Size(mm): 0.4-0.7 Morphology: SUBHEDRAL-PRISMATIC
APPROX COMP AN72-50;
CLINOPYROXENE ( 5%)
Size(mm): 0.3-0.45 Morphology: SUBHEDRAL
MAGNETITE ( 4%)
TI-MAGN*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL
GROUNDMASS TO MICROLITIC;
CLINOPYROXENE ( 30%)
Size(mm): 0.03-0.1 Morphology: PRISMATIC
GROUNDMASS TO MICROLITIC;
MAGNETITE ( 12%)
Size(mm): 0.02-0.1
Alteration - CLAY MINERALS ( 3-5%)
Location: SPOTS Replacing: PYX,OL,PLAG
IDDINGSITE
Replacing: OL
IDDINGS REPLACES MARGINS OF OL*
Leg : 61 Top/Bottom Interval(mm): 270/ 290 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 594.50 Rock Type: IGNEOUS
Core: 65 Sample Midpoint(m) : 597.78 Sect/Pc #: 3/PCE 1D
ROCK = DOLERITE;
Texture: SUBOPHITIC;
Where sampled: NEAR MARGIN OF SILL*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): 0.3-0.7 Morphology: SUBHEDRAL-PRISMATIC
MICROPHENOS,APPROX COMP AN50;
CLINOPYROXENE ( 3%)
Size(mm): 0.3-0.4 Morphology: SUBHEDRAL
MICROPHENOS;
MAGNETITE ( 3%)
Size(mm): 0.3-0.5
TI-MAGN,MICROPHENOS*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL
GROUNDMASS TO MICROLITIC;
CLINOPYROXENE ( 30%)
Size(mm): 0.03-0.1 Morphology: PRISMATIC
GROUNDMASS TO MICROLITIC;
MAGNETITE ( 14%)
Size(mm): 0.02-0.1
QUARTZ ( 2%)
MYRMEKITIC PATCHES,GRANOPHYRIC PHASE*
Alteration - CLAY MINERALS ( 5-8%)
Location: SPOTS Replacing: PYX,PLAG
Leg : 61 Top/Bottom Interval(mm): 220/ 240 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 599.23 Sect/Pc #: 1/PCE 1A
ROCK = DOLERITE;
Texture: SUBOPHITIC;
Where sampled: NEAR MARGIN OF SILL*
Phenocrysts- PLAGIOCLASE ( 13%)
Size(mm): 0.3-0.6 Morphology: SUBHEDRAL-PRISMATIC
MICROPHENOS,APPROX COMP AN62-35;
CLINOPYROXENE ( 3%)
Size(mm): 0.3-0.5 Morphology: SUBHEDRAL
MICROPHENOS;
MAGNETITE ( 2%)
Size(mm): 0.3-0.5
MICROPHENOS,TI-MAGN*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.05-0.15 Morphology: SUBHEDRAL
GROUNDMASS TO MICROLITIC;
CLINOPYROXENE ( 33%)
Size(mm): 0.03-0.1 Morphology: PRISMATIC
GROUNDMASS TO MICROLITIC;
MAGNETITE ( 14%)
Size(mm): 0.02-0.1
QUARTZ
Alteration - CLAY MINERALS ( 5%)
Location: SPOTS Replacing: PYX,PLAG
Leg : 61 Top/Bottom Interval(mm): 860/ 880 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 599.87 Sect/Pc #: 1/PCE 2
ROCK = MICRODOLORITE;
Texture: MICRODOLERITIC,HOLOCRYSTALLINE;
Where sampled: INTERMEDIATE FROM MARGIN TO INTERIOR OF SILL*
Groundmass - PLAGIOCLASE ( 55%)
Size(mm): .02-0.6 Morphology: ELONGATE PRISMS
MORE COARSE-ZONED,APPROX COMP AN48-82;
CLINOPYROXENE ( 40%)
Size(mm): 0.08-0.4 Morphology: TABULAR
INTERSTITIAL;
MAGNETITE ( 5%)
Size(mm): 0.04-0.2 Morphology: IRREGULAR
Alteration - CLAY MINERALS ( 8%)
SPOTTED AGGREGATES AROUND MAGN + PYX*
Leg : 61 Top/Bottom Interval(mm): 860/ 880 Describer: Tokuyama, H.
Hole: 462 Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 599.87 Sect/Pc #: 1/PCE 2
ROCK = DOLERITE;
Texture: SUBOPHITIC;
Where sampled: TRANSITIONAL ZONE BETWEEN MARGIN AND INTERIOR OF
SILL*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): 0.5-0.7 Morphology: SUBHEDRAL-PRISMATIC
MICROPHENOS,APPROX COMP AN45;
CLINOPYROXENE ( 5%)
Size(mm): 0.4-0.6 Morphology: SUBHEDRAL
MICROPHENOS;
MAGNETITE ( 3%)
Size(mm): 0.4-0.6
MICROPHENOS,TI-MAGNETITE*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.05-0.2 Morphology: SUBHEDRAL
GROUNDMASS TO MICROLITIC;
CLINOPYROXENE ( 30%)
Size(mm): 0.03-0.1 Morphology: PRISMATIC
GROUNDMASS TO MICROLITIC;
MAGNETITE ( 12%)
Size(mm): 0.02-0.1
GROUNDMASS TO MICROLITIC;
QUARTZ
Alteration - CLAY MINERALS ( 5%)
Location: SPOTS Replacing: PYX
Leg : 61 Top/Bottom Interval(mm): 650/ 670 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 601.16 Sect/Pc #: 2/PCE 3B
ROCK = DOLERITE;
Texture: DOLERITIC (OPHITIC);
Where sampled: SILL INTERIOR*
Groundmass - PLAGIOCLASE ( 60%)
Size(mm): 0.1-3.0 Morphology: ELONGATE PRISMS,TABULAR
APPROX COMP AN45-76,TABULAR XTLS ARE ZONED;
CLINOPYROXENE ( 32%)
Size(mm): 0.1-3.0 Morphology: ELONGATE PRISMS
INTERSTITIAL;
MAGNETITE ( 7%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL,IRREGULAR
ALKALI FELDSPAR ( 1%)
Size(mm): 0.5
INTERGRANULAR GRANOPHYRIC AGGREGATES*
Alteration - CLAY MINERALS ( 5%)
SPOTTED AGGREGATES AROUND MAGN + PYX*
Leg : 61 Top/Bottom Interval(mm): 120/ 140 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 603.63 Sect/Pc #: 4/PCE 1A
ROCK = DOLERITE;
Texture: MICRODOLERITIC-GLOMEROPORPHYRITIC,
HOLOCRYSTALLINE;
Where sampled: SILL INTERIOR*
Groundmass - PLAGIOCLASE ( 60%)
Size(mm): <0.02-1.2 Morphology: PRISMATIC,TABULAR
MICROLITES,APPROX COMP AN56-76,TABULAR XTLS ARE
COARSE;
CLINOPYROXENE ( 32%)
Size(mm): 0.04-0.8 Morphology: COARSE,TABULAR
INTERSTITIAL;
MAGNETITE ( 8%)
Size(mm): 0.08-0.4 Morphology: ANHEDRAL,IRREGULAR
Alteration - CLAY MINERALS ( 5%)
SPOTTED AGGREGATES AROUND MAGN + PYX*
Leg : 61 Top/Bottom Interval(mm): 420/ 450 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 605.44 Sect/Pc #: 5/PCE 1D
ROCK = DOLERITE;
Texture: SUBOPHITIC;
Where sampled: SILL INTERIOR*
Groundmass - PLAGIOCLASE ( 38%)
Size(mm): 0.02-1.4 Morphology: ELONGATE PRISMS,TABULAR
MICROLITES,APPROX COMP AN48-78,TABULAR XTLS ARE
COARSE
CLINOPYROXENE ( 45%)
Size(mm): 0.08-0.6
INTERSTITIAL,RESORBED TABULAR XTLS;
MAGNETITE ( 15%)
Size(mm): 0.04-0.4 Morphology: IRREGULAR,SKELETAL
COMBINATION ( 2%)
Size(mm): 0.2-0.4
CONSISTS OF QUARTZ AND ALKALI FELDSPAR GRANOPHYRIC
AGGREGATES*
Alteration - CLAY MINERALS ( 10%)
SPOTTED AGGREGATES AROUND MAGN + PYX*
Vesicles -
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 300/ 330 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 599.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 606.82 Sect/Pc #: 6/PCE 1B
ROCK = DOLERITE
Texture: SUBOPHITIC-GLOMEROPORPHYRITIC,
HOLOCRYSTALLINE;
Where sampled: SILL INTERIOR*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 55%)
Size(mm): <0.02-2.2 Morphology: ELONGATE PRISMS,TABULAR
COARSER TABULAR XTLS SHOW ZONATION,APPROX COMP
AN48-76;
CLINOPYROXENE ( 35%)
Size(mm): 0.08-1.6
ELONGATE PRISMS ARE RESORBED;
MAGNETITE ( 8%)
Size(mm): 0.08-0.8 Morphology: IRREGULAR,SKELETAL
SKELETAL XTLS ARE COMMON;
COMBINATION ( 2%)
Size(mm): 0.4
GRANOPHYRIC AGGREGATES OF QUARTZ AND ALKALI
FELDSPAR*
Alteration - CARBONATE
Location: 0
CLAY MINERALS ( 10%)
SPOTTED AGGREGATES AROUND MAGN + PYX*
Vesicles -
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 500/ 540 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 606.00 Rock Type: IGNEOUS
Core: 67 Sample Midpoint(m) : 606.52 Sect/Pc #: 1/PCE 2B
ROCK = MICRODOLERITE;
Texture: DOLERITIC, OPHITIC, HOLOCRYSTALLINE;
Where sampled: SILL INTERIOR*
Groundmass - PLAGIOCLASE ( 65%)
Size(mm): 0.04-2.0 Morphology: ELONGATE PRISMS,TABULAR
COARSER TABULAR XTLS SHOW ZONATION,APPROX COMP
AN45-82;
CLINOPYROXENE ( 20%)
Size(mm): 0.1-1.4 Morphology: IRREGULAR
ELONGATE PRISMS ARE RESORBED;
MAGNETITE ( 15%)
Size(mm): 0.08-0.4 Morphology: IRREGULAR,SKELETAL
SKELETAL XTLS ARE COMMON;
COMBINATION ( TR%)
Size(mm): 0.08-0.1
RARE DISSEMINATED GRAINS OF CHALCOPYRITE AND
PYRRHOTITE;
PYRRHOTITE
CHALCOPYRITE
Alteration - CARBONATE ( 0%)
CLAY MINERALS ( 5%)
SPOTTED AGGREGATES AROUND MAGN + PYX*
Vesicles -
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 680/ 720 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 606.00 Rock Type: IGNEOUS
Core: 67 Sample Midpoint(m) : 606.70 Sect/Pc #: 1/PCE 2C
ROCK = MICRODOLORITE;
Texture: SPOTTED MICRODOLORITIC-DOLORITIC,
HOLOCRYSTALLINE;
Where sampled: SILL INTERIOR*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 65%)
Size(mm): <0.02-2.2 Morphology: ELONGATE PRISMS,TABULAR
ZONATION IN COARSE TABULAR XTLS,APPROX COMP
AN42-72;
CLINOPYROXENE ( 22%)
Size(mm): 0.04-2.2
ELONGATED PRISMS ARE RESORBED,INTERSTITIAL
MAGNETITE ( 12%)
Size(mm): 0.1-0.4
INTERSTITIAL*
Alteration - CARBONATE ( 0%)
CLAY MINERALS ( 10%)
Location: SPOTS Replacing: PYX,MAGN
ZEOLITE ( 0%)
Leg : 61 Top/Bottom Interval(mm): 900/ 940 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 606.00 Rock Type: IGNEOUS
Core: 67 Sample Midpoint(m) : 608.42 Sect/Pc #: 2/PCE 2
ROCK = MICRODOLORITE;
Texture: MICRODOLERITIC-DOLERITIC,HOLOCRYSTALLINE;
Where sampled: SILL INTERIOR*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 60%)
Size(mm): <0.02-0.8 Morphology: ELONGATE PRISMS,TABULAR
ZONATION IN COARSE TABULAR XTLS,CUMULOPHYRIC,
APPROX COMP AN75-48;
CLINOPYROXENE ( 25%)
Size(mm): 0.07-0.5
INTERSTITIAL;
MAGNETITE ( 15%)
INTERSTITIAL;
ILMENITE
PERCENTAGE AND/OR IDENTITY IS QUESTIONABLE;
GLASS ( 0%)
ORTHOPYROXENE ( 0%)
QUARTZ ( 0%)
ALKALI FELDSPAR ( 0%)
Alteration - CLAY MINERALS ( 20%)
Location: VEINS,SPOTS Replacing: ALL.MINS
ZEOLITE ( 0%)
Vesicles -
Size(mm): CARB
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 730/ 750 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 609.00 Rock Type: IGNEOUS
Core: 68 Sample Midpoint(m) : 609.74 Sect/Pc #: 1/PCE 3C
ROCK = MICRODOLORITE;
Texture: DOLERITIC, OPHITIC, HOLOCRYSTALLINE;
Where sampled: SILL INTERIOR*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.2-0.4 Morphology: EQUIDIMENSIONAL
PERCENTAGE QUESTIONABLE,ALTERED TO BROWN SMEC;
PLAGIOCLASE ( 40%)
Morphology: ELONGATE PRISMS,TABULAR
DIMENSIONS: 0.04-0.1 MM BY 0.1-1.2 MM,ZONATION IN
COARSE TABULAR XTLS AND NEAR QUARTZ,APPROX COMP
AN40-100;
CLINOPYROXENE ( 45%)
Size(mm): 0.2-2.0
INTERSTITIAL,ELONGATE RESORBED PRISMS;
MAGNETITE ( 12%)
Size(mm): 0.06-0.6
INTERSTITIAL;
PYRRHOTITE ( 1%)
Size(mm): 0.04-0.1
INTERGROWTHS WITH MAGN;
QUARTZ ( 1%)
Size(mm): 0.08-1.2
INTERSTITIAL AND IN GRANOPHYRIC INTERGROWTH WITH
ALKALI FELDSPAR;
ALKALI FELDSPAR ( TR%)
Size(mm): <0.02
IN GRANOPHYRIC INTERGROWTH WITH QUARTZ;
HORNBLENDE ( TR%)
Size(mm): 0.04-0.3
REACTION RIMS AROUND MAGN,TI-BEARING;
BIOTITE ( TR%)
Size(mm): 0.08
REACTION RIMS AROUND MAGN,TI-BEARING*
Alteration - CARBONATE ( 0%)
CLAY MINERALS ( 1%)
Replacing: OL,PYX
OL REPLACED BY BROWN SMEC;
ZEOLITE ( 0%)
Vesicles -
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 370/ 390 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 609.00 Rock Type: IGNEOUS
Core: 68 Sample Midpoint(m) : 610.88 Sect/Pc #: 2/PCE 1A
ROCK = MICRODOLERITE;
Texture: DOLERITIC, OPHITIC, HOLOCRYSTALLINE;
Where sampled: SILL INTERIOR*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.4-0.8 Morphology: EQUIDIMENSIONAL
PERCENTAGE QUESTIONABLE,ALTERED TO BROWN SMEC;
PLAGIOCLASE ( 21%)
Morphology: ELONGATE PRISMS
DIMENSIONS: 0.04-0.6 MM BY 1-2 MM,APPROX COMP
AN45-78,ZONATION MORE DISTINCT IN COARSE GRAINS;
CLINOPYROXENE ( 60%)
Size(mm): 0.4-2.2 Morphology: TABULAR
INTERSTITIAL,POIKILOPHITIC TABULAR XTLS;
MAGNETITE ( 15%)
Size(mm): 0.1-0.8
INTERSTITIAL,DUST-LIKE IN OL PSEUDOMORPHS;
ILMENITE
IDENTITY AND/OR PERCENTAGE QUESTIONABLE;
PYRRHOTITE ( 1%)
Size(mm): 0.04-0.2
INTERGROWTHS WITH MAGN;
QUARTZ ( 1%)
Size(mm): 0.08-0.8
INTERSTITIAL,INCLUDES NEEDLES OF APATITE;
HORNBLENDE ( 1%)
Size(mm): 0.06-0.4
BROWN,TI-BEARING,RIMS AROUND MAGN,PARTLY OXIDIZED;
BIOTITE ( TR%)
Size(mm): 0.02-0.08 Morphology: PLATY
TI-BEARING,RARE PLATES NEAR MAGN*
Alteration - CARBONATE ( 0%)
CLAY MINERALS ( 2%)
Replacing: OL,PYX
OL ALTERED TO BROWN SMEC PSEUDOMORPHS,PYX ONLY
PARTLY ALTERED;
ZEOLITE ( 0%)
OTHER
HBL PARTLY OXIDIZED*
Vesicles -
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 490/ 510 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 609.00 Rock Type: IGNEOUS
Core: 68 Sample Midpoint(m) : 611.00 Sect/Pc #: 2/PCE 1A
ROCK = MICRODOLERITE;
Texture: DOLERITIC, OPHITIC, HOLOCRYSTALLINE;
Where sampled: SILL INTERIOR*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.2-0.5 Morphology: EQUIDIMENSIONAL
ALTERED TO MAGN-SMEC PSEUDOMORPHS,PERCENTAGE
QUESTIONABLE;
PLAGIOCLASE ( 58%)
Morphology: ELONGATE PRISMS
DIMENSIONS: 0.05-0.2 MM BY 0.2-1.5 MM,ZONATION
ONLY IN COARSE GRAINS,APPROX COMP AN45-70;
CLINOPYROXENE ( 25%)
Size(mm): 0.2-1.2
INTERSTITIAL;
MAGNETITE ( 12%)
Size(mm): 0.04-0.2
INTERSTITIAL,DUST-LIKE MAGN REPLACING OL;
ILMENITE
IDENTITY AND/OR PERCENTAGE QUESTIONABLE;
GLASS ( 0%)
ORTHOPYROXENE ( 0%)
QUARTZ ( 0%)
PYRRHOTITE ( 2%)
Size(mm): 0.04-0.1
INTERGROWTHS WITH MAGN;
HORNBLENDE ( 1%)
Size(mm): 0.05-0.4
BROWN,TI-BEARING,RIMS AROUND MAGN,PARTLY OXIDIZED
TO GREEN HORNBLENDE;
BIOTITE ( TR%)
Size(mm): 0.02-0.05 Morphology: THIN PLATES
TI-BEARING,NEAR OL PSEUDOMORPHS;
APATITE ( TR%)
Size(mm): 0.02-0.04 Morphology: EUHEDRAL
Alteration - CARBONATE ( 0%)
CLAY MINERALS ( 3%)
Replacing: OL,PYX
OL ALTERED TO MAGN-SMEC PSEUDOMORPHS,PYX ONLY
PARTLY ALTERED;
MAGNETITE
Replacing: OL
OL ALTERED TO MAGN-SMEC PSEUDOMORPHS;
ZEOLITE ( 0%)
OTHER
BROWN HBL OXIDIZED TO GREEN HBL*
Vesicles -
Percent: 0
Leg : 61 Top/Bottom Interval(mm): 360/ 390 Describer: Shcheka, S.A.
Hole: 462 Top of Core Depth(m) : 614.00 Rock Type: IGNEOUS
Core: 69 Sample Midpoint(m) : 614.38 Sect/Pc #: 1/PCE 1C
ROCK = DOLERITE;
Texture: OPHITIC,HOLOCRYSTALLINE;
Where sampled: LOWER PART OF SILL*
Groundmass - PLAGIOCLASE ( 53%)
Size(mm): 0.1-4 Morphology: ELONGATE PRISMS,TABULAR
TABULAR XTLS ARE ZONED, APPROX COMP AN38-68;
CLINOPYROXENE ( 30%)
Size(mm): 0.08-3 Morphology: IRREGULAR,ELONGATE PRISMS
INTERSTITIAL;
MAGNETITE ( 10%)
Size(mm): 0.1-2 Morphology: ANHEDRAL,SKELETAL
PYRRHOTITE ( TR%)
Size(mm): 0.04-0.08 Morphology: ROUNDED
RARE DISSEMINATED GRAINS;
QUARTZ ( 5%)
Morphology: ANHEDRAL
INTERGROWTHS IN GRANOPHYRIC AGGREGATES;
ALKALI FELDSPAR ( 2%)
GRANOPHYRIC AGGREGATES;
APATITE ( TR%)
Size(mm): <0.04
NEEDLES IN QUARTZ*
Alteration - CLAY MINERALS ( 17%)
Replacing: PYX,MAGN
PSEUDOMORPHS*
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