OCEAN DRILLING PROGRAM July 1990 DATA FILE DOCUMENTATION PHYSICAL PROPERITES MEASUREMENTS INDEX PROPERTIES DATA BALANCE AND PYCNOMETER MEASUREMENTS I. INTRODUCTION The Index Properties data file contains information generated onboard the JOIDES Resolution by the shipboard physical properties scientists and technicians. Each sample is placed in a numbered beaker and is weighed on a balance, and the volume of the sample and beaker is measured in a pycnometer. The sample is then dried and the weight and volume are remeasured. The index properties are calculated from these values. The balances used to weigh the samples have a precision of approximately +/- 0.02 to 0.03 gram, and the pycnometers are precise to approximately +/- 0.05 cubic centimeter. This yields a precision of approximately +/- 1% on unconsolidated sediments and about +/- 2% on consolidated sediments and hard rocks. The Index Properties data file contains the raw weights and volumes and calculated values for the Index Properties tests. The calculated values included in this data file are wet and dry bulk density, porosity, wet and dry water content, grain density, and void ratio. When calculating these values, the beaker weight and volume must be subtracted from the raw weights and volumes (both sample and beaker together) to obtain the sample weights and volumes. 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 data file contains data from Legs 101 to 129, with the exception of Leg 102, where no data were collected. No beaker data are available for Legs 104, 107, 108, 109, 111, 112, 114, 117, and 124E. For these legs, the raw data and calculated values have been entered into the data file, but without the beaker data there is no way to check the accuracy of thes data. Throughout the data file there are occasional records that do not have the raw data recorded because of inconsistencies with the published data. In these cases, the published values are entered in the data file and the problems with the raw data are noted in the comments field. III. BIBLIOGRAPHY Boyce, R.E., 1976. Definitions and laboratory techniques of compressional sound velocity parameters and water-wet content, wet-bulk density, and porosity parameters by gravimetric and gamma ray attenuation techniques. In: Schlanger, S.O., et al., 1976, Initial Reports of the Deep Sea Drilling Project, vol. 33: Washington (U.S. Goverment Printing Office) pp. 931-958. IV. DATA ITEM FORMATS The following tables list the data items and their formats. For data requests other than on paper (e.g., on magnetic tape), an accompanying sheet will contain any additional information needed to read the data. INDEX PROPERTIES ITEMS FORMAT ============================ ========================= LEG Integer 3 SUBLEG Text 1 SITE Integer 4 HOLE Text 1 DATE_TIME Text 19 (MM/DD/YYYY HH:MM:SS) OBSERVER Text 4 CORE Integer 3 CORETYPE Text 1 SECTION Text 2 TOP_INTERVAL Integer 3 BOTTOM_INTERVAL Integer 3 SAMPLE_CODE Text 4 PIECE Integer 3 SUBPIECE Text 1 BEAKER Integer 3 BEAKER_WEIGHT Decimal F6.3 BEAKER_VOLUME Decimal F6.3 WET_WEIGHT Decimal F6.3 WET_VOLUME Decimal F6.3 DRY_WEIGHT Decimal F6.3 DRY_VOLUME Decimal F6.3 WET_BULK_DENSITY Decimal F4.2 DRY_BULK_DENSITY Decimal F4.2 GRAIN_DENSITY Decimal F4.2 POROSITY_1 Decimal F5.1 POROSITY_2 Decimal F5.1 WET_WATER_CONTENT Decimal F5.1 DRY_WATER_CONTENT Decimal F5.1 VOID_RATIO_1 Decimal F5.2 VOID_RATIO_2 Decimal F5.2 COMMENTS Text 70 ADD_DATE Text 18 (MM/DD/YYYY HH:MMam or pm) CHANGE_DATE Text 18 (MM/DD/YYYY HH:MMam or pm) V. EXPLANATION OF THE INDEX PROPERTIES DATA ITEMS 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. DATE_TIME - The date and time when the tests were performed. OBSERVER - Three or four letter code identifying the person performing the velocity test. CORE - Number identifying the core. Cores are numbered serially from the top of the hole downward. CORETYPE - A letter code identifying the drill bit/coring method used to retrieve the core. The coretype codes are: B - Drill Bit C - Center Bit D - Positive Displacement H - Hydraulic (Advanced) Piston Core I - Interstitial water (only used on Legs 101 to 116) M - Miscellaneous N - Downhole Mud Motor (Navidrill) P - Pressure Core Barrel 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. TOP_INTERVAL - The location in centimeters within a section of the top of the interval tested. BOTTOM_INTERVAL - The location of the bottom of a sample within a section in centimeters. SAMPLE_CODE - An alpha code identifying the investigator or test for which the sample was taken. PIECE - Number identifying a rock piece within a section. A piece is one or a group of rock fragments that can be fitted together. SUBPIECE - Letter identifying the individual rock fragments within a piece. BEAKER - The number identifying the pycnometer beaker in which the sample was placed for testing. BEAKER_WEIGHT - The weight in grams of the empty beaker. BEAKER_VOLUME - The volume in cubic centimeters of the empty beaker. WET_WEIGHT - The weight in grams of the wet saturated sample and the beaker containing it. WET_VOLUME - The volume in cubic centimeters of the wet saturated sample and the beaker containing it. DRY_WEIGHT - The weight in grams of the dry sample and the beaker containing it. DRY_VOLUME - The volume in cubic centimeters of the dry sample and the beaker containing it. The equations and constants listed below are used in the following Index Properties calculations: SALINITY = 35.0 SALT_DENSITY = 2.257 gm/cm**3 WATER DENSITY = 1.0245 gm/cm**3 SALT_FACTOR = (1000.0 - SALINITY) / 1000.0 SALT_RATIO = SALINITY / (1000.0 - SALINITY) SALT = .035 * CORRECTED_WET_WEIGHT CORRECTED_WATER_WEIGHT = (SAMPLE_WET_WEIGHT - SAMPLE_DRY_WEIGHT) / 0.965 SAMPLE_WET_WEIGHT = WET_WEIGHT - BEAKER_WEIGHT SAMPLE_WET_VOLUME = WET_VOLUME - BEAKER_VOLUME SAMPLE_DRY_WEIGHT = DRY_WEIGHT - BEAKER_WEIGHT SAMPLE_DRY_VOLUME = DRY_VOLUME - BEAKER_VOLUME WET_BULK_DENSITY - The wet bulk density of the sample in grams/cubic centimeter, calculate as: WET_BULK_DENSITY = SAMPLE_WET_WEIGHT / SAMPLE_WET_VOLUME DRY_BULK_DENSITY - The dry bulk density of the sample in grams/cubic centimeter, calculated as: DRY_BULK_DENSITY = (SAMPLE_DRY_WEIGHT - SALT) / SAMPLE_WET_VOLUME This value is used in calculating mass accumulation rates. GRAIN_DENSITY - The grain density of the sample in grams/cubic centimeter, calculated as: SAMPLE_DRY_WEIGHT - SALT GRAIN_DENSITY = ------------------------------------------------ SAMPLE_DRY_VOLUME - (SALT / SALT_DENSITY) POROSITY_1 - The porosity of the sample as a percentage, calculated as: (100 * CORRECTED_WATER_WEIGHT) POROSITY_1 = ------------------------------------- (WATER_DENSITY * SAMPLE_WET_VOLUME) POROSITY_2 - An alternative porosity calculation, also given as a percentage, that does not utilize a wet volume measurement, calculated as: 100 * GRAIN_DENSITY - SAMPLE_WET_WEIGHT --------------------------------------------------------- SAMPLE_DRY_VOLUME + SAMPLE_WET_WEIGHT - SAMPLE_DRY_WEIGHT POROSITY_2 = -------------------------------------------------------------- GRAIN_DENSITY - WATER DENSITY WET_WATER_CONTENT - Water content as a percentage that compares the weight of water relative to the weight of the water and solids, calculated as: 100 * CORRECTED_WATER_WEIGHT WET_WATER_CONTENT = ----------------------------------- SAMPLE_WET_WEIGHT DRY_WATER_CONTENT - The water content as a percentage that compares the weight of water relative to the weight of the solids only, calculated as: 100 * CORRECTED_WATER_WEIGHT DRY_WATER_CONTENT = ---------------------------------------------- SAMPLE_DRY_WEIGHT - SALT VOID_RATIO_1 - The ratio of the void space to the volume of solid substance in the sample, calculated as: CORRECTED_WATER_WEIGHT VOID_RATIO_1 = ------------------------------------------------------------ WATER DENSITY * SAMPLE_WET_VOLUME - CORRECTED_WATER_WEIGHT VOID_RATIO_2 - An alternative void ratio calculation that does not rely on wet volume measurements, calculated as: CORRECTED_WATER_WEIGHT VOID_RATIO_2 = --------------------------------------------------------- WATER DENSITY * (SAMPLE_DRY_VOLUME - SALT / SALT_DENSITY) COMMENTS - Any comments concerning the test or sample. ADD_DATE - The date when the record was added to the data file. CHANGE_DATE - The date when the record was last updated. RECORD FORMAT ON TAPE FOR THE INDEX PROPERTIES DATA SET INDEX PROPERTIES DATA ITEMS COLUMN ON TAPE =========================== ============== LEG 2-4 SUBLEG 5 SITE 6-9 HOLE 10 DATE_TIME 11-29 OBSERVER 30-33 CORE 34-36 CORETYPE 37 SECTION 38-39 TOP_INTERVAL 40-42 BOTTOM_INTERVAL 43-45 SAMPLE_CODE 46-49 PIECE 50-52 SUBPIECE 53 BEAKER 54-56 BEAKER_WEIGHT 57-62 BEAKER_VOLUME 63-68 WET_WEIGHT 69-74 WET_VOLUME 75-80 DRY_WEIGHT 81-86 DRY_VOLUME 87-92 WET_BULK_DENSITY 93-96 DRY_BULK_DENSITY 97-100 GRAIN_DENSITY 101-104 POROSITY_1 105-109 POROSITY_2 110-114 WET_WATER_CONTENT 115-119 DRY_WATER_CONTENT 120-124 VOID_RATIO_1 125-129 VOID_RATIO_2 130-134 COMMENTS 135-204 ADD_DATE 205-222 CHANGE_DATE 223-240