OCEAN DRILLING PROGRAM July 1990 DATA FILE DOCUMENTATION * Revised edition PHYSICAL PROPERTIES MEASUREMENTS COMPRESSIONAL / SHEAR WAVE VELOCITY DATA I. INTRODUCTION The Velocity data file contains information generated onboard the JOIDES Resolution by the shipboard physical properties scientists and technicians. The velocities were measured on individual core samples taken after the core had reached room temperature. Compressional wave velocities were measured with a Hamilton Frame Velocimeter (accurate to +/- 2%), while shear wave velocities were measured using piezoelectric bender or blade transducers with an assigned error of 20% maximum. Measurements may be made in three directions with respect to an oriented sample: along the length of the core, horizontally and parallel to the split core surface, or horizontally and perpendicular to the split core surface. The Velocity data file contains raw data and calculated values for velocity tests. Each record represents an individual core sample, and may contain the results from up to six tests on that sample in the same and/or different directions using compressional and/or shear waves. In the cases of Legs 101, 115, and 122, insufficient data were available for the inclusion of the raw data in all of the records. 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. On Leg 115, more data were collected than those entered into the computer database. This is because of uncertainty concerning the Leg 115 data and, therefore, only data from samples with velocities published in the Initial Reports of the Ocean Drilling Program are entered. The data that were not entered are available in paper form from the Data Librarian. 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. Government 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. VELOCITY DATA 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 TEMPERATURE Decimal F4.1 Each Record may contain up to six values of the following: WAVE_DISTANCE Decimal F6.2 WAVE_TIME Decimal F6.3 ZERO_DISTANCE Decimal F6.2 ZERO_TIME Decimal F6.3 DIR_PROPAGATION Text 1 DIR_VIBRATION Text 1 COMPRESSIONAL_OR_SHEAR Text 1 VELOCITY Integer 4 COMMENTS Text 70 BEAKER Integer 3 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 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 test was 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 retrive 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. TEM the velocity test was performed. WAVE_DISTANCE - The total distance in mm the wave travels, including the distance through the sample plus the distance through the transducers. This may be the actual distance or the scale reading from the instrument, but must be the same type of value as the zero distance. WAVE_TIME - The total time in msec the wave travels, including the time through the sample plus the time through the transducers. ZERO_DISTANCE - The distance in mm the wave travels when the transducers are placed in contact with each other. The actual value is usually in the range of 0 - 2.5 mm but the scale on the instrument is marked in reverse from 100, so values could be in range of 100 - 97.5 mm. Either the actual value or the scale reading is valid as long the same type of measurement is entered for the wave distance. ZERO_TIME - The time in msec it takes the wave to travel the distance when the transducers are in contact. DIR_PROPAGATION - The direction of wave propagation. The codes are: A - Along the length of the core. B - Horizontally and parallel to the split core surface. C - Horizontally and perpendicular to the split core surface. DIR_VIBRATION - The direction of wave vibration. The codes are the same as those for the direction of wave propagation. COMPRESSIONAL_OR_SHEAR - Compressional or Shear Wave, calculated from the directions of propagation and vibration. The wave is compressional (C) if the directions of propagation and vibration are the same. The wave is shear (S) if the directions of propagation and vibration are different. VELOCITY - The velocity of the wave through the sample in meters per second, rounded to nearest integer, calculated as VELOCITY = 1000 * CORRECTED_DISTANCE / CORRECTED_TIME, where CORRECTED_DISTANCE = | WAVE_DIST - ZERO_DIST |, and CORRECTED_TIME = WAVE_TIME - ZERO_TIME. COMMENTS - Comments concerning the test or sample. BEAKER - If the sample is placed into a beaker to prepare it for Index Properties testing after performing Velocity tests, then this is the number of that beaker. ADD_DATE - The date and time of entry of the data into the database. CHANGE_DATE - The date and time that the record was last changed. RECORD FORMAT ON TAPE FOR THE COMPRESSIONAL/SHEAR WAVE VELOCITY DATA SET VELOCITY 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 TEMPERATURE 54-57 TEST_DISTANCE(1) or WAVE_DISTANCE(1) 58-63 TEST_DISTANCE(2) or WAVE_DISTANCE(2) 64-69 TEST_DISTANCE(3) or WAVE_DISTANCE(3) 70-75 TEST_DISTANCE(4) or WAVE_DISTANCE(4) 76-81 TEST_DISTANCE(5) or WAVE_DISTANCE(5) 82-87 TEST_DISTANCE(6) or WAVE_DISTANCE(6) 88-93 TEST_TIME(1) or WAVE_TIME(1) 94-99 TEST_TIME(2) or WAVE_TIME(2) 100-105 TEST_TIME(3) or WAVE_TIME(3) 106-111 TEST_TIME(4) or WAVE_TIME(4) 112-117 TEST_TIME(5) or WAVE_TIME(5) 118-123 TEST_TIME(6) or WAVE_TIME(6) 124-129 ZERO_DISTANCE(1) 130-135 ZERO_DISTANCE(2) 136-141 ZERO_DISTANCE(3) 142-147 ZERO_DISTANCE(4) 148-153 ZERO_DISTANCE(5) 154-159 ZERO_DISTANCE(6) 160-165 ZERO_TIME(1) 166-171 ZERO_TIME(2) 172-177 ZERO_TIME(3) 178-183 ZERO_TIME(4) 184-189 ZERO_TIME(5) 190-195 ZERO_TIME(6) 196-201 DIR_PROPAGATION(1) 202 DIR_PROPAGATION(2) 203 DIR_PROPAGATION(3) 204 DIR_PROPAGATION(4) 205 DIR_PROPAGATION(5) 206 DIR_PROPAGATION(6) 207 DIR_VIBRATION(1) 208 DIR_VIBRATION(2) 209 DIR_VIBRATION(3) 210 DIR_VIBRATION(4) 211 DIR_VIBRATION(5) 212 DIR_VIBRATION(6) 213 COMPRESSIONAL_OR_SHEAR(1) 214 COMPRESSIONAL_OR_SHEAR(2) 215 COMPRESSIONAL_OR_SHEAR(3) 216 COMPRESSIONAL_OR_SHEAR(4) 217 COMPRESSIONAL_OR_SHEAR(5) 218 COMPRESSIONAL_OR_SHEAR(6) 219 VELOCITY(1) 220-223 VELOCITY(2) 224-227 VELOCITY(3) 228-231 VELOCITY(4) 232-235 VELOCITY(5) 236-239 VELOCITY(6) 240-243 COMMENTS 244-313 BEAKER 314-316 ADD_DATE 317-334 CHANGE_DATE 335-352