OCEAN DRILLING PROGRAM revised DATA FILE DOCUMENTATION July 1990 X-RAY FLUORESCENCE SPECTROMETRY DATA I. INTRODUCTION The X-ray Fluorescence Spectrometry data file contains information generated onboard the JOIDES Resolution by the shipboard geochemists. Each record in the data file contains the concentration of certain major and/or trace elements for a single sample taken from an interval of core. These data are collected by means of an X-ray fluorescence spectrometer. This device determines elemental concentrations by analyzing the intensities and wavelengths of secondary X-rays produced when a sample is irradiated by primary X-rays. Major elements are reported in oxide percentage and trace elements are reported in elemental ppm (except Titanium which is reported in elemental percentage). 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. No X-ray Fluorescence data were collected on Legs 101, 102, 103, 104, 105, 107, 108, or 110. III. BIBLIOGRAPHY Bertin, E.P., 1979. Principles and Practice of X-ray Spectrometric Analysis, 3rd ed. New York: Plenum Press 544 p. Bougault, H., 1977. Major elements, analytical chemistry on board and preliminary results. In Aumento, F, Melson, W.G., et al., Initial Reports of the Deep Sea Drilling Project, v. 37: Washington (U.S. Government Printing Office), P. 643-657. IV. DATA ITEM FORMATS The following table lists the data items and their formats. For data requests other than on paper (ie. on magnetic tape), an accompanying sheet will contain any more information needed to read the data. X-RAY FLUORESCENCE SPECTROMETRY 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 OBSERVER Text 4 PIECE Integer 3 SUB_PIECE Text 1 UNIT_NUMBER Integer 4 MAJOR_ELEMENT_WEIGHT_PERCENT Decimal F6.2 SIO2, TIO2, AL2O3, FE2O3, MNO, MGO, CAO, NA2O, K2O, P2O5, TOTAL_OXIDES IGNITION_LOSS Decimal F6.2 FRACTIONATION_GRADE Decimal F6.2 COMMENTS Text 60 TRACE_ELEMENT Decimal F7.1 NB, ZR, Y, SR, RB, ZN, CU, NI, CR, V, CE, BA, S, TI, CO, LA, TH, EU, SC, TB, HF, GA, TA, ND, YB, U, SM, LU, PB, CS, LI, SB, B, F, GD, TM, AG, DY, HO, SN, MO, BE, AU, BI, CL, TL, ER, PR, PT, W, GE, PD, IR, AS, SE, BR, CD ("TI" is Decimal F6.2) ADDITIONAL_TRACE_ELEMENT.NAME Text 2 ADDITIONAL_TRACE_ELEMENT.PPM Decimal F7.1 V. EXPLANATION OF THE X-RAY FLUORESCENCE SPECTROMETRY DATA ITEMS SAMPLE_CODE - An alpha code identifying the investigator or test for which the sample was taken. 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 in the same area with the same objectives after a port call and 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. 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 Piston Core 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 of the top of a sample within a section in centimeters. BOTTOM_INTERVAL - The location of the bottom of a sample within a section in centimeters. OBSERVER - Person performing the X-ray Fluorescence analysis. A four letter code, usually the same as that person's assigned sample code, is used. PIECE - Number identifying a rock piece within a section. A piece is one or a group of rock fragments that can be fitted together. SUB_PIECE - Letter identifying the individual rock fragments within a piece. UNIT_NUMBER - The number identifying a particular lithologic unit based on visual observations of rock texture and composition. Unit numbers are initially assigned and described in the Igneous/Metamorphic Visual Core Description data file and are numbered serially from the top of the hole. MAJOR_ELEMENT_WEIGHT_PERCENT - A group of weight percentages of major element oxides in the sample. The major elements included in the file are SIO2, TIO2, AL2O3, FE2O3, MNO, MGO, CAO, NA2O, K2O, and P2O5. IGNITION_LOSS - The amount of weight in grams lost when the sample was heated to remove water. The change of weight involves loss of water and possibly other volatiles, but often includes the addition of oxygen by oxidation of iron or other reactive substances. FRACTIONATION_GRADE - A calculated percentage that gives some indication of the degree of fractionation of basic igneous rocks. The formula is FM = (100*FeO)/(FeO+MgO). COMMENTS - Contains any comments or remarks about the X-ray Fluorescence analysis or data for a the sample. TRACE_ELEMENT - A group of values representing the concentration of minor elements in ppm for all elements except Titanium (TI), which is given in percentage. Each element is referred to by its standard atomic symbol. The file consists of values for NB, ZR, Y, SR, RB, ZN, CU, NI, CR, V, CE, BA, S, TI, CO, LA, TH, EU, SC, TB, HF, GA, TA, ND, YB, U, SM, LU, PB, CS, LI, SB, B, F, GD, TM, AG, DY, HO, SN, MO, BE, AU, BI, CL, TL, ER, PR, PT, W, GE, PD, IR, AS, SE, BR, and CD. ADDITIONAL_TRACE_ELEMENT.NAME - A group of four additional trace element names which would be used when trace element concentration within a sample is measured for elements not included in the TRACE_ELEMENT group above. Each name in the group would correspond to a trace element concentration entry in the ADDITIONAL_TRACE_ELEMENT_PPM group below. ADDITIONAL_TRACE_ELEMENT.PPM - A group of four additional trace element concentration values which would be used when trace elements are measured which are not included in the TRACE_ELEMENT group above. Each value would correspond to a trace element name entry in the ADDITIONAL_TRACE_ELEMENT_NAME group above. RECORD FORMAT ON FILE FOR THE X-RAY FLUORESCENCE DATA SET COLUMN DATA ITEMS 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 OBSERVER 27-30 PIECE 31-33 SUB_PIECE 34-34 UNIT_NUMBER 35-38 MAJOR_ELEMENT_WEIGHT_PERCENT 39-104 SIO2, TIO2, AL2O3, FE2O3, MNO, MGO, in order CAO, NA2O, K2O, P2O5, TOTAL_OXIDES 6 columns each IGNITION_LOSS 105-110 FRACTIONATION_GRADE 111-116 COMMENTS 117-176 TRACE_ELEMENT 177-574 NB, ZR, Y, SR, RB, ZN, CU, NI, CR, V, in order CE, BA, S, TI, CO, LA, TH, EU, SC, TB, 7 columns each HF, GA, TA, ND, YB, U, SM, LU, PB, CS, except TI which LI, SB, B, F, GD, TM, AG, DY, HO, SN, is 6 MO, BE, AU, BI, CL, TL, ER, PR, PT, W, GE, PD, IR, AS, SE, BR, CD ("TI" is Decimal F6.2) ADDITIONAL_TRACE_ELEMENT.NAME 575-576 ADDITIONAL_TRACE_ELEMENT.PPM 577-583 ADDITIONAL_TRACE_ELEMENT.NAME 584-585 ADDITIONAL_TRACE_ELEMENT.PPM 586-592 ADDITIONAL_TRACE_ELEMENT.NAME 593-594 ADDITIONAL_TRACE_ELEMENT.PPM 595-601 ADDITIONAL_TRACE_ELEMENT.NAME 602-603 ADDITIONAL_TRACE_ELEMENT.PPM 604-610