OCEAN DRILLING PROGRAM revised DATA FILE DOCUMENTATION July 1990 SEDIMENT CHEMICAL ANALYSES INTERSTITIAL WATER I. INTRODUCTION The Interstitial Water data file and the Borehole_IW data file contain the results of analyses performed on interstitial water samples collected from cores and downhole instruments onboard the JOIDES Resolution. The Interstitial Water data file includes data from (1) water samples extracted from cores, and (2) water samples, collected by a downhole instrument, that can be associated with a core. This second type of water sample was extracted from the top of a core while the core was still in situ. The Borehole_IW data file contains the results from (1) surface sea water samples, and (2) water samples, collected by a downhole instrument, that cannot be associated with a core. These samples were not extracted from the top of an in situ core, but from somewhere within the drilled hole. Each record in either data file includes a sample identifier along with the results and methods used for any parameters analyzed. The sample identifier in the Borehole_IW data file does not include Core, Coretype, Section, Top Interval, or Bottom Interval. Instead each sample is identified by Leg, Subleg, Site, Hole, and Depth in the hole. On most legs, interstitial waters were routinely analyzed for pH, alkalinity, salinity, chlorinity, calcium, magnesium and sulfate. The data files also contain "Other_Components" data items to allow for parameters that are not commonly determined for a sample. The method of obtaining interstitial waters from core sediments, using a stainless steel press, has been described in detail by Manheim and Sayles (1974). The use of a downhole instrument to obtain water samples is discussed in Barnes (1979), Barnes (1988) and the "Explanatory Notes" chapters in the Proceedings of the Ocean Drilling Program. The IAPSO (International Association of Physical Science Organizations) standard seawater is the primary standard for water analyses used onboard the ship. If you have problems or questions concerning these data, please contact: Data Librarian, Data Base Group Ocean Drilling Program Texas A&M University Research Park 1000 Discovery Drive College Station, Texas 77845-9547 U.S.A. (979) 845-8495, 845-2673 Easylink (Telex) Number: 62760290 Email: database@odpemail.tamu.edu Fax Number: 979-845-4857 II. LEGS IN THE DATA FILE The Interstitial Water data file contains data from Legs 101 to 129. No data were collected on Legs 102, 106, 109, or 118. The Borehole_IW data file contains data from Legs 101 to 129. No data were collected on Legs 103, 105, 106, and 114 to 129. III. BIBLIOGRAPHY Barnes, R. O., 1979. Operation of the IPOD in situ pore water sampler. In Sibuet, J.-C., Ryan, W. B. F., et al., Initial Reports. DSDP, 47, Pt.2:Washington (U.S. Govt. Printing Office), 19-22. Barnes, R. O., 1988. ODP in situ fluid sampling and measurement: a new wireline tool. In Proceedings of the Ocean Drilling Program, Initial Reports (Pt.A), 110, Explanatory Notes chapters, 1986 - present. In Proceedings of the Ocean Drilling Program, Initial Reports (Pt. A). Gieskes, J. M., and Peretsman, G., 1986. Water chemistry procedures aboard JOIDES Resolution--some comments. ODP Technical Note No. 5, 46 p. Manheim, F. T., and Sayles, F. L., 1974. Composition and origin of interstitial waters of marine sediments based on deep sea drill cores. In Goldberg, E. D., (Ed.), The Sea, (Vol. 5): New York (Wiley), 527-568. IV. METHODS The methods used to analyze the interstitial waters are listed below. Preceding each method is a one letter code. For each parameter in the data file, there is a corresponding methods data item (ie. Alkalinity_method, etc.). The one letter code is recorded in the methods data item to indicate which method was used to determine a given parameter. CODE METHOD I ION CHROMATOGRAPHY -using a Dionex Ion Chromatograph which is equipped with both anion and cation separation columns. T TITRATION -using a Metrohm titrator R REFRACTOMETER -using a Goldberg optical refractometer which measures total dissolved solids S SPECTROPHOTOMETER -Using a Bausch and Lomb spectrophotometer A ATOMIC ABSORPTION -Using a Varian atomic absorption spectrophotometer E ELECTRODE -Using a Brinkmann combination electrode for pH and Eh measurements. A more complete discussion of the methods used on a particular leg can be found in each of the "Explanatory Notes" chapters in the Proceedings of the Ocean Drilling Program (see section III, above). V. DATA ITEM FORMATS INTERSTITIAL WATER AND BOREHOLE_IW ITEMS FORMAT =========================================== ========= SAMPLE_CODE Text 4 LEG Integer 3 SUBLEG Text 1 SITE Integer 4 HOLE Text 1 *CORE Integer 3 *CORETYPE Text 1 *SECTION Text 2 *TOP_INTERVAL Integer 3 *BOTTOM_INTERVAL Integer 3 !DEPTH Decimal F7.1 WATER_VOLUME Integer 3 PH Decimal F5.2 PH_METHOD Text 1 ALKALINITY Decimal F7.3 ALKALINITY_METHOD Text 1 SALINITY Decimal F4.1 SALINITY_METHOD Text 1 CHLORINITY Decimal F7.2 CHLORINITY_METHOD Text 1 MAGNESIUM Decimal F6.2 MAGNESIUM_METHOD Text 1 CALCIUM Decimal F6.2 CALCIUM_METHOD Text 1 SULFATE Decimal F6.2 SULFATE_METHOD Text 1 PHOSPHATE Decimal F6.2 PHOSPHATE_METHOD Text 1 AMMONIA Integer 5 AMMONIA_METHOD Text 1 SILICA Integer 4 SILICA_METHOD Text 1 POTASSIUM Decimal F6.2 POTASSIUM_METHOD Text 1 NITRATE Decimal F4.1 NITRATE_METHOD Text 1 BROMIDE Decimal F6.2 BROMIDE_METHOD Text 1 MANGANESE Integer 3 MANGANESE_METHOD Text 1 IRON Integer 3 IRON_METHOD Text 1 STRONTIUM Integer 4 STRONTIUM_METHOD Text 1 OTHER_COMPONENTS (up to 2 groups) NAME Text 10 UNITS Text 8 RESULTS Text 10 METHOD Text 1 COMMENTS Text 67 * Found only in the Interstitial Water data file ! Found only in the Borehole_IW data file NGDC note: only iw (not bore_iw) are searchable through the ODP CD-ROM select/retrieval software. Bore_iw are found in compressed form in subdirectory \DATA on disc 1a. VI. EXPLANATION OF THE INTERSTITIAL WATER AND BORE HOLE_IW DATA ITEMS For all method data items, refer to the method codes listed in Section IV above. SAMPLE_CODE - An alpha code identifying the investigator or test for which the sample was taken. The following sample codes are used to indicate the type of downhole instrument used to take a downhole water sample: CODE DOWNHOLE INSTRUMENT KUS# Kuster RFT# RFT PACK Packer PW Barnes (old, pre-1986) WSTP Barnes (new, 1986+) For information about these methods, refer to the "Explanatory Notes" chapters in the Proceedings of the Ocean Drilling Program (see section III). The presence of any of these codes in the Interstitial Water data file indicates that the sample was taken from a core, while it was in situ. LEG - Number identifying the cruise. The Ocean Drilling Program started numbering the cruises of the JOIDES Resolution at Leg 101. SUBLEG - Letter identifying a subleg or transit. A subleg is the continuation of a Leg after a port call; it often involves a crew change. SITE - Number identifying the site. A site is the position of a beacon around which holes are drilled. HOLE - Letter identifying the hole. CORE - Number identifying the core. Cores are numbered serially from the top of the hole downward. (Only found in Interstitial Water data file.) CORETYPE - A letter code identifying the drill bit/coring method used to retrieve the core. (Only found in Interstitial Water data file.) The coretype codes are: B - Drill Bit C - Center Bit D - Positive Displacement H - Hydraulic (Advanced) Piston Core I - Interstitial Water Core M - Miscellaneous N - Downhole Mud Motor (Navidrill) P - Pressure Core Sampler R - Rotary S - Side Wall Core W - Wash Core X - Extended Core Barrel SECTION - A core is cut into 1.5 meter long sections that are numbered serially from the top of the core. A core with full recovery will have 7 sections and a core catcher and be approximately 9.8 meters long. (Only found in Interstitial Water data file.) TOP_INTERVAL - The location of the top of a sample within a section in centimeters. (Only found in Interstitial Water data file.) BOTTOM_INTERVAL - The location of the bottom of a sample within a section in centimeters. (Only found in Interstitial Water data file.) DEPTH - Depth in meters down the hole from which the sample was taken. (Only found in Borehole_IW data file.) WATER_VOLUME - The water volume of the sample in ml. PH - The pH value of the sample. ALKALINITY - The alkalinity value in millimoles/liter. SALINITY - The salinity value in g/Kg. CHLORINITY - The chlorinity value in millimoles/liter. MAGNESIUM - The magnesium value in millimoles/liter. CALCIUM - The calcium value in millimoles/liter. SULFATE - The sulfate value in millimoles/liter. PHOSPHATE - The phosphate value in micromoles/liter. AMMONIA - The ammonia value in micromoles/liter. SILICA - The silica value in micromoles/liter. POTASSIUM - The potassium value in millimoles/liter. NITRATE - The nitrate value in micromoles/liter. BROMIDE - The bromide value in micromoles/liter. MANGANESE - The manganese value in micromoles/liter. IRON - The iron value in micromoles/liter. STRONTIUM - The strontium value in micromoles/liter. OTHER_COMPONENTS NAME - The name of an additional component or parameter that was analyzed. UNITS - The units of the additional component. RESULTS - The value determined for the additional component. METHOD - One letter method code indicating the method used for the analysis (See Section IV above). COMMENTS - Contains any comments or remarks about the sample. RECORD FORMAT ON FILE FOR THE INTERSTITIAL WATER DATA SET COLUMN FIELD ON FILE ====================================== ========= SAMPLE_CODE 2-5 LEG 6-8 SUBLEG 9-9 SITE 10-13 HOLE 14-14 CORE 15-17 CORETYPE 18-18 SECTION 19-20 TOP_INTERVAL 21-23 BOTTOM_INTERVAL 24-26 WATER_VOLUME 27-29 PH 30-34 PH_METHOD 35-35 ALKALINITY 36-42 ALKALINITY_METHOD 43-43 SALINITY 44-47 SALINITY_METHOD 48-48 CHLORINITY 49-55 CHLORINITY_METHOD 56-56 MAGNESIUM 57-62 MAGNESIUM_METHOD 63-63 CALCIUM 64-69 CALCIUM_METHOD 70-70 SULFATE 71-76 SULFATE_METHOD 77-77 PHOSPHATE 78-83 PHOSPHATE_METHOD 84-84 AMMONIA 85-89 AMMONIA_METHOD 90-90 SILICA 91-94 SILICA_METHOD 95-95 POTASSIUM 96-101 POTASSIUM_METHOD 102-102 NITRATE 103-106 NITRATE_METHOD 107-107 BROMIDE 108-113 BROMIDE_METHOD 114-114 MANGANESE 115-117 MANGANESE_METHOD 118-118 IRON 119-121 IRON_METHOD 122-122 STRONTIUM 123-126 STRONTIUM_METHOD 127-127 OTHER_COMPONENTS NAME 128-137 UNITS 138-145 RESULTS 146-155 METHOD 156-156 NAME 157-166 UNITS 167-174 RESULTS 175-184 METHOD 185-185 COMMENTS 186-252 RECORD FORMAT ON FILE FOR THE BOREHOLE INTERSTITIAL WATER DATA SET COLUMN FIELD ON FILE ====================================== ========= SAMPLE_CODE 2-5 LEG 6-8 SUBLEG 9-9 SITE 10-13 HOLE 14-14 DEPTH 15-21 WATER_VOLUME 22-24 PH 25-29 PH_METHOD 30-30 ALKALINITY 31-37 ALKALINITY_METHOD 38-38 SALINITY 39-42 SALINITY_METHOD 43-43 CHLORINITY 44-50 CHLORINITY_METHOD 51-51 MAGNESIUM 52-57 MAGNESIUM_METHOD 58-58 CALCIUM 59-64 CALCIUM_METHOD 65-65 SULFATE 66-71 SULFATE_METHOD 72-72 PHOSPHATE 73-78 PHOSPHATE_METHOD 79-79 AMMONIA 80-84 AMMONIA_METHOD 85-85 SILICA 86-89 SILICA_METHOD 90-90 POTASSIUM 91-96 POTASSIUM_METHOD 97-97 NITRATE 98-101 NITRATE_METHOD 102-102 BROMIDE 103-108 BROMIDE_METHOD 109-109 MANGANESE 110-112 MANGANESE_METHOD 113-113 IRON 114-116 IRON_METHOD 117-117 STRONTIUM 118-121 STRONTIUM_METHOD 122-122 COMPONENT.NAME1 123-132 COMPONENT.NAME2 133-142 COMPONENT.NAME3 143-152 COMPONENT.NAME4 153-162 COMPONENT.UNITS1 163-170 COMPONENT.UNITS2 171-178 COMPONENT.UNITS3 179-186 COMPONENT.UNITS4 187-194 COMPONENT.RESULTS1 195-204 COMPONENT.RESULTS2 205-214 COMPONENT.RESULTS3 215-224 COMPONENT.RESULTS4 225-234 COMPONENT.METHOD1 235-235 COMPONENT.METHOD2 236-236 COMPONENT.METHOD3 237-237 COMPONENT.METHOD4 238-238 COMMENTS 239-305