PETROS Igneous Petrology Databank: README file version 6.1 NGDC Data Set # 0030 obtained from: U.S. Department of Commerce National Environmental Satellite, Data, and Information Service National Oceanic and Atmospheric Administration U.S. National Geophysical Data Center (NGDC) (http://www.ngdc.noaa.gov/mgg/mggd.html) & collocated World Data Center A- Marine Geology & Geophysics (http://www.ngdc.noaa.gov/mgg/wdcamgg) _______________________________________________________________________ NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THESE DATA _______________________________________________________________________ CONTRIBUTOR: Dr. Felix Mutschler, Eastern Washington State University DATA SET NAME: PETROS version 6.1 LAST UPDATE: 1980 GEOGRAPHIC REGION: Global DATA VOLUME: approximately 9 mbytes MGG IDENTIFIER: MGG42995006 LIST OF FILES petros (data), martha (documentation), README(this file) SUMMARY PETROS is a worldwide data bank of major element chemical analyses of igneous rocks compiled for research and teaching purposes by Dr. Felix Mutschler and staff at Eastern Washington University. PETROS version 6.1 includes 37,300 major element chemical analyses divided into 307 major groups representing geographic areas or petrologic provinces. Also included are 468 average igneous rock compositions calculated by various authors, a bibliography of information sources, and complete format/operating instructions for PETROS. In compiling PETROS, as few analyses as possible were rejected, allowing data bank users to exercise their own judgement on data values. Sources include published works, theses, and in a few cases, unpublished analytical data, all of which are referenced in the bibliography. Generally, only those analyses which included determinations of at least eight major oxides were accepted. Some quality control was exercised, and duplicate analyses, where possible were eliminated. Latitude/longitude information for samples is to the nearest one degree. An accompanying program listing in FORTRAN for searching PETROS is included with the data file, along with complete format documentation. AVAILABILITY Data are available for free download from NGDC's Web server. NGDC/WDC MGG Technical Contact: Carla Moore NOAA/NGDC E/GC3 325 Broadway Boulder, CO 80305 USA phone: 303-497-6339 fax: 303-497-6513 email: Carla.J.Moore@noaa.gov DOCUMENTATION FROM E. WASHINGTON UNIVERSITY ******************************************************************************** ******************************************************************************** P E T R O S A DATA BANK OF MAJOR ELEMENT CHEMICAL ANALYSES OF IGNEOUS ROCKS FOR RESEARCH AND TEACHING (VERSION 6.1) COMPILED BY FELIX E. MUTSCHLER DENISE JEANNE ROUGON OWEN P. LAVIN AND ROGER D. HUGHES DEPARTMENT OF GEOLOGY EASTERN WASHINGTON UNIVERSITY CHENEY, WASHINGTON 99004, USA APRIL 1981 DISTRIBUTED BY MARINE GEOLOGY & GEOPHYSICS DIVISION NOAA-NGDC MAIL CODE E/GC3 325 BROADWAY BOULDER, COLORADO 80305, USA ******************************************************************************** ******************************************************************************** ***************************************** RATIONALE "IT IS COMING TO BE RECOGNIZED BY PETROLOGISTS IN GENERAL THAT THE STUDY OF IGNEOUS ROCKS IS IN LARGE PART THE STUDY OF SILICATE SOLUTIONS AND THEIR EQUILIBRIA, OFTEN COMPLICATED BY THE PRESENCE OF VOLATILE COMPONENTS, AND IS THUS TO BE REGARDED AS ESSENTIALLY A SPECIAL BRANCH OF PHYSICAL CHEMISTRY.... FOR THIS ROCK ANALYSES ARE ALL-IMPORTANT -- INDEED INDISPENSABLE." H. S. WASHINGTON, 1917 "THE CENOZOIC PERIOD HAS BEEN CHARACTERIZED BY ENORMOUS VOLCANIC ACTIVITY, AND ALTHOUGH KNOWLEDGE OF THE GEOCHEMISTRY OF MOST INDIVIDUAL CENOZOIC VOLCANIC COMPLEXES IS STILL FRAGMENTARY WE ARE ALREADY FACED WITH AN ACCUMULATION OF ANALYTICAL DATA SO VAST THAT MOST OF US SIMPLY IGNORE ALL BUT THE MINUTE FRACTION OF IT IMMEDIATELY RELEVANT TO OUR CURRENT RESEARCH." F. CHAYES AND D. METAIS, 1963 "A COMPLETE COLLECTION IS ACTUALLY A COLLECTOR'S NIGHTMARE, BECAUSE NOTHING MORE CAN BE COLLECTED INTO IT. IT IS NO LONGER A COLLECTION AT ALL, BUT A MUSEUM PIECE. MOST COLLECTORS INSTINCT- IVELY AVOID AREAS WHERE COMPLETION IS EVEN FAINTLY POSSIBLE. IF WEALTH AND LONGEVITY SHOULD CONSPIRE TO BRING A COLLECTION DANGER- OUSLY TO COMPLETION, THE COLLECTOR WILL MARSHALL EVERY ENERGY TO POSTPONE SUCH DISASTER." M. LAURENCE, 1971 ***************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ********** AN INTRODUCTION TO PETROS ********** ********** (FILE "MARTHA") ********** (only excerpts from Martha are included in this README file) ******************************************************************************** ******************************************************************************** ******************************************************************************** **************************************** NONE OF THE MATERIAL INCLUDED ON THIS TAPE IS MEANT AS A SUBSTITUTE FOR THE ORIGINAL WORKS, FROM PORTIONS OF WHICH THE CHEMICAL ANALYSES IN FILE "PETROS" WERE COLLECTED. COMPLETE BIBLIOGRAPHIC CITATIONS FOR THE SOURCES USED ARE INCLUDED IN FILE "MARTHA". **************************************** REFERENCES TO PETROS IT IS RECOMMENDED THAT CITATIONS OF PETROS BE MADE IN THE FOLLOWING FORM: MUTSCHLER, F. E., ROUGON, D. J., LAVIN, O. P., AND HUGHES, R. D., 1981, PETROS -- A DATA BANK OF MAJOR ELEMENT CHEMICAL ANALYSES OF IGNEOUS ROCKS FOR RESEARCH AND TEACHING (VERSION 6.1): BOULDER, COLORADO, NOAA-- NATIONAL GEOPHYSICAL AND SOLAR-TERRESTRIAL DATA CENTER. ****************************************** THE ACCOMPANYING TAPE CONSISTS OF TWO FILES, "PETROS" AND "MARTHA". "PETROS" IS A DATA BANK OF 37,300 MAJOR ELEMENT CHEMICAL ANALYSES OF IGNEOUS ROCKS DIVIDED INTO 307 MAJOR GROUPS WHICH REPRESENT GEOGRAPHIC AREAS OR PETROLOGIC PROVINCES. THESE DATA ARE FOLLOWED BY 486 AVERAGE IGNEOUS ROCK COMPOSITIONS CALCULATED BY VARIOUS AUTHORS. "MARTHA" INCLUDES A DESCRIPTION OF THE ORGANIZATION OF DATA BANK "PETROS", A LIST OF SAMPLE IDENTIFICATION FORMATS AND CODES, BIBLIOGRAPHIES LISTING THE SOURCES OF ANALYSES FOR EACH MAJOR GROUP IN "PETROS", AND A LISTING OF THESE OPERATING INSTRUCTIONS. A Fortran program, DATARD, is included with PETROS for data access. ********************* WE HOPE USERS OF "PETROS" AND "MARTHA" WILL CALL OUR ATTENTION TO ANY ERRORS THEY FIND. WE WOULD ALSO APPRECIATE RECEIVING REPRINTS OF PAPERS CONTAINING MAJOR ELEMENT ROCK ANALYSES FOR INCLUSION IN FUTURE SUPPLEMENTS TO "PETROS". PLEASE ADDRESS CORRESPONDENCE TO: FELIX E. MUTSCHLER DEPARTMENT OF GEOLOGY EASTERN WASHINGTON UNIVERSITY CHENEY, WA 99004, USA ********************* ******************************************************************************** ******************************************************************************** ********** PETROS DESCRIPTION ********** ******************************************************************************** ******************************************************************************** DATA BANK "PETROS" CONTAINS 37,300 MAJOR ELEMENT CHEMICAL ANALYSES OF IGNEOUS ROCKS. A SUPPLEMENT ATTACHED TO "PETROS" CONTAINS 486 AVERAGE IGNEOUS ROCK COMPOSITIONS CALCULATED BY VARIOUS AUTHORS. THE AIM IN DEVELOPING "PETROS" IS ULTIMATELY TO COMPILE AS COMPLETE A LISTING AS POSSIBLE OF MAJOR ELEMENT IGNEOUS ROCK ANALYSES FOR SELECTED GEOGRAPHIC AREAS AND PETROLOGIC PROVINCES. A GUIDING PHILOSOPHY HAS BEEN TO REJECT AS FEW ANALYSES AS POSSIBLE, THUS ENABLING THE USER TO PASS JUDGMENT ON RELIABILITY AND, IF HE WISHES, TO REJECT DATA DURING RETRIEVAL. THE SOURCES USED INCLUDE PUBLISHED WORKS; AND THESES, WHICH ARE GENERALLY AVAILABLE EITHER ON MICROFILM OR THROUGH INTER-LIBRARY LOAN SERVICES. IN A FEW CASES, INDIVIDUAL AUTHORS HAVE MADE AVAILABLE ANALYTICAL DATA WHICH WERE NOT PUBLISHED, BUT WHICH WERE MENTIONED IN THEIR PUBLICATIONS. SUCH DATA ARE INDICATED IN THE FILE "MARTHA" BIBLIOGRAPHIES. FOR INCLUSION IN "PETROS" WE HAVE GENERALLY SELECTED ONLY THOSE ANALYSES THAT CONTAIN DETERMINATIONS OF AT LEAST NINE OF THE MAJOR OXIDES. WHERE A COMPUTER GENERATED OXIDE SUM DID NOT MATCH THE SOURCE SUM THE SOURCE WAS RECHECKED. MANY ERRORS REPRESENTED OBVIOUS TYPESETTING, COPYING, OR KEYPUNCHING MISTAKES WHICH WERE CORRECTED. WHERE A GROSS ERROR COULD NOT BE RESOLVED, THE ANALYSIS WAS REJECTED. DUPLICATE ANALYSES HAVE BEEN SORTED OUT AND REMOVED FROM "PETROS" BY COMPUTER. WHERE DUPLICATES WERE DISCOVERED, WE HAVE TENDED TO RETAIN THE ANALYSIS FROM THE ORIGINAL, OR EARLIER SOURCE, EXCEPT WHERE THE SECONDARY SOURCE CONTAINED ADDITIONAL PERTINENT INFORMATION. "PETROS" DOES NOT DISCRIMINATE ON THE BASIS OF AGE OR LANGUAGE. OLD ANALYSES MAY BE AS RELIABLE, OR UNRELIABLE, AS ANALYSES IN CURRENT JOURNALS. THE LANGUAGE BARRIER HAS, HOWEVER, LIMITED OUR SEARCH OF THE RUSSIAN, JAPANESE, AND CHINESE LITERATURE. ADDITIONAL INFORMATION ON "PETROS" MAY BE FOUND IN: MUTSCHLER, F. E., ROUGON, D. J., AND LAVIN, O. P., 1976, PETROS, A DATA BANK OF MAJOR-ELEMENT CHEMICAL ANALYSES OF IGNEOUS ROCKS FOR RESEARCH AND TEACHING: COMPUTERS & GEOSCIENCES, V. 2, P. 51-57. BARR, D., MUTSCHLER, F. E., AND LAVIN, O. P., 1977, KEYBAM-- A SYSTEM OF INTERACTIVE COMPUTER PROGRAMS FOR USE WITH THE PETROS DATA BANK OF MAJOR-ELEMENT ANALYSES OF IGNEOUS ROCKS: COMPUTERS & GEOSCIENCES, V. 3, P. 489-496. EACH ANALYSIS IS STORED ON THREE CARDS AS SHOWN BY THE FOLLOWING EXAMPLE: SCHMIDT (1956) MRN.PAGA.18 146E OL. AUG. BASALT Q F T.6-4 (CARD 1) 50.87 15.46 4.32 8.20 5.55 10.64 2.63 0.71 0.24 0.02 0.95 (CARD 2) 0.24 0.21 . . . . . . . . . (CARD 3) CARD 1:SAMPLE IDENTIFICATION IN COL. 1-73. FORMAT GIVEN BELOW (20A4) CARD 2:WEIGHT PERCENT OF SIO2,AL2O3,FE2O3,FEO,MGO,CAO,NA2O,K2O,H2O+,H2O-,TIO2 IN 11F6.2 FORMAT CARD 3:WEIGHT PERCENT OF P2O5,MNO,ZRO2,CO2,SO3,CL,F,S,CR2O3,NIO,BAO IN 11F6.2 FORMAT THE ANALYSES HAVE BEEN DIVIDED INTO 307 MAJOR GROUPS WHICH REPRESENT GEOGRAPHIC AREAS OR PETROLOGIC PROVINCES. THESE DATA GROUPS ARE SEPARATED FROM EACH OTHER BY THREE CARDS AS SHOWN BY THE FOLLOWING EXAMPLE: SOC SOCIETY ISLANDS PACIFIC OCEAN (CARD 1) -1 (CARD 2) (CARD 3) CARD 1: GROUP CODE (COL. 1-3), GROUP NAME (COL. 7-35), LOCATION (COL. 37-73) CARD 2: -1 IN COL. 1-2 CARD 3: BLANK TO FACILITATE INDEXING AND LOCATING INDIVIDUAL ANALYSES AND GROUPS OF ANALYSES THE IMAGE OF EACH THIRD CARD HAS BEEN NUMBERED CONSECUTIVELY IN COL. 74-80 ON TAPE. THUS THE CARD 1 FOR EACH ANALYSIS AND FOR EACH GROUP SEPARATOR HAS A UNIQUE SEQUENCE NUMBER AS SHOWN BY THE FOLLOWING EXAMPLES: DALRYMPLE + (1974) HAW.NEC .24 165 BASALT T F 8G 334 1359300 45.66 13.98 7.19 5.50 7.02 10.75 1.99 0.38 1.76 1.84 3.18 0.45 0.16 . 0.01 . . . 0.07 . . . HEA HEARD ISLAND INDIAN OCEAN 1359400 -1 LACROIX (1923) HEA. .53S074E DOREITE P248 A 1359500 50.34 16.63 2.39 7.44 3.92 8.20 3.86 3.22 0.51 . 3.18 0.66 . . . . . . . . . . ********************************* * SAMPLE IDENTIFICATION FORMATS * ********************************* INFORMATION ON THE SAMPLE IDENTIFICATION CARD (CARD 1) FOR EACH ANALYSIS IS IN THE FOLLOWING STANDARD FORMAT: COL. 1-20 REFERENCE -- AUTHOR, DATE COL. 21-23 MAJOR GROUP CODE COL. 24 . COL. 25-28 SECONDARY GROUP CODE COL. 29 . COL. 30-31 LATITUDE TO NEAREST DEGREE COL. 32 S IF SOUTH LATITUDE COL. 33-35 LONGITUDE TO NEAREST DEGREE COL. 36 E IF EAST LONGITUDE COL. 37 BLANK COL. 38-59 ROCK NAME, ETC. (MAY INCLUDE STRATIGRAPHIC OR MAP UNIT DESIGNATION) COL. 60-61 AGE -- ACCORDING TO THE FOLLOWING CODE Z PRE-MESOZOIC (NOT CODED IN THIS EDITION OF "PETROS") M MESOZOIC R TRIASSIC J JURASSIC K CRETACEOUS KA CRETACEOUS-PALEOCENE MT MESOZOIC-TERTIARY TK TERTIARY-CRETACEOUS T TERTIARY A PALEOCENE E EOCENE EO EOCENE-OLIGOCENE O OLIGOCENE OI OLIGOCENE-MIOCENE I MIOCENE IL MIOCENE-PLIOCENE L PLIOCENE LP PLIO-PLEISTOCENE TQ TERTIARY-QUATERNARY Q QUATERNARY P PLEISTOCENE H HOLOCENE HH HISTORIC Y -OR OLDER RADIOMETRIC DATE LIMITS FOR GEOLOGIC AGES ARE BASED ON HARLAND AND OTHERS, 1964, THE PHANEROZOIC TIME-SCALE -- A SYMPOSIUM DEDICATED TO PROFESSOR ARTHUR HOLMES: GEOL. SOC. LONDON QUART. JOUR., SUPP., V. 120S, 458 P.; EXCEPT THAT THE MIOCENE- PLIOCENE BOUNDARY IS TAKEN AS 12 M. Y. COL. 62-63 TYPE -- ACCORDING TO THE FOLLOWING CODE D DIKE OR MINOR INTRUSION F FLOW G SUBAQUAEOUS FLOW OR PALAGONITE I IGNIMBRITE (WELDED TUFF) L LAVA LAKE P LARGE PLUTON OR PLUTONIC ROCK R SAMPLE MAY BE ICE-RAFTED T PYROCLASTIC MATERIAL (TEPHRA) X XENOLITH Z ALTERED ROCK M METAMORPHOSED ROCK S ROCK OR MINERAL SEPARATE A AVERAGE OF SEVERAL ANALYSES COL. 64-71 AUTHOR'S ANALYSIS OR IDENTIFICATION NUMBER COL. 72-73 ANALYTIC INFORMATION -- ACCORDING TO THE FOLLOWING CODE: * TOTAL IRON REPORTED AS FEO / TOTAL IRON REPORTED AS FE2O3 # SULFIDE ADJUSTMENT--FES2, FES REPORTED BY AUTHOR HAVE BEEN CONVERTED TO FEO AND S + BAO INCLUDES SRO L H2O+ INCLUDES 'LOSS ON IGNITION'--NOT ALWAYS INDICATED COL. 74-80 SEQUENCE NUMBER File Martha contains much additional information.