Gibson Ian L 1991 Composition of Broken Ridge samples (Table 1) dataset https://doi.org/10.1594/PANGAEA.759426 Gibson Ian L 1991 Diagenesis, heat flow, and rifting at Broken Ridge, Indian Ocean book chapter In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program) 121 https://doi.org/10.2973/odp.proc.sr.121.164.1991 519-523 The Broken Ridge tilted and truncated sequence of middle Eocene to Turanian calcareous sediments with intercalated basaltic ash layers is characterized by diagenetic alteration. The level at which opal-CT forms from volcanic glass and the opal-CT/quartz boundary shows that this alteration increases in intensity with stratigraphic depth and is not related to depth below the seafloor. Thus, the rocks were altered before they were tilted and truncated. The preservation of the pre-rift alteration history may be a function of the rapid uplift and erosion following the initiation of spreading between Broken Ridge and the Kerguelen Plateau. The geothermal gradient at the time of rifting, deduced from the pattern of silica diagenesis, agrees with results from present-day heat-flow measurements and suggests that there was no large thermal anomaly at Broken Ridge that time. 93.5467 93.5899 -31.03 -30.839 93.56942000000001 -30.9284 1988-05-12T16:30:00 1988-05-24T07:30:00 45.5 406.8 ODP Ocean Drilling Program https://www-odp.tamu.edu:443/ Ocean Drilling Program, Texas A&M University ODP http://www-odp.tamu.edu/ https://ror.org/01f5ytq51 121-752B -30.891 93.5775 -1097.0 1988-05-18T09:00:00 1988-05-22T12:30:00 435.6 m 112.34 m South Indian Ridge, South Indian Ocean Leg121 https://doi.org/10.2973/odp.proc.ir.121.1989 Weissel, Jeffrey K Peirce, John W 1988-04-30 1988-06-28 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 17 cores; 158 m cored; 0 m drilled; 71.1 % recovery 121-753A -30.839 93.5899 -1187.0 1988-05-12T16:30:00 1988-05-13T06:15:00 62.8 m 61.06 m South Indian Ridge, South Indian Ocean Leg121 https://doi.org/10.2973/odp.proc.ir.121.1989 Weissel, Jeffrey K Peirce, John W 1988-04-30 1988-06-28 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 7 cores; 62.8 m cored; 0 m drilled; 97.2 % recovery 121-754A -30.941 93.5665 -1075.0 1988-05-13T18:30:00 1988-05-15T05:15:00 172.1 m 128.27 m South Indian Ridge, South Indian Ocean Leg121 https://doi.org/10.2973/odp.proc.ir.121.1989 Weissel, Jeffrey K Peirce, John W 1988-04-30 1988-06-28 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 23 cores; 170 m cored; 0 m drilled; 75.5 % recovery 121-754B -30.941 93.5665 -1076.0 1988-05-15T05:15:00 1988-05-18T05:40:00 354.7 m 91.85 m South Indian Ridge, South Indian Ocean Leg121 https://doi.org/10.2973/odp.proc.ir.121.1989 Weissel, Jeffrey K Peirce, John W 1988-04-30 1988-06-28 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 24 cores; 232 m cored; 0 m drilled; 39.6 % recovery 121-755A -31.03 93.5467 -1069.0 1988-05-22T15:00:00 1988-05-24T07:30:00 208.4 m 80.21 m South Indian Ridge, South Indian Ocean Leg121 https://doi.org/10.2973/odp.proc.ir.121.1989 Weissel, Jeffrey K Peirce, John W 1988-04-30 1988-06-28 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 19 cores; 178.4 m cored; 0 m drilled; 45 % recovery 268 CC-BY-3.0 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ At Site 753, stratigraphic depth = mbsf; at Site 752, stratigraphic depth = mbsf + 77 m; at Site 754, stratigraphic depth = mbsf + 342 m; at Site 755, stratigraphic depth = mbsf + 1091.5 m. These transformations assume that 190 m of the section is missing between Sites 753 and 752, that there is a 20-m overlap between Sites 752 and 754, and that 460 m of the section is missing between Sites 754 and 755. Event label Event Event Sample code/label Sample label DSDP/ODP/IODP sample designation hdl:10013/epic.27914.d001 Gibson Ian L Sample label (DSDP/ODP/IODP sample designation) Number No number Gibson Ian L XRD No (XRD) DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Depth sed [m] Depth, reconstructed Reconstr depth m depth http://purl.obolibrary.org/obo/PATO_0001595 reconstructed Length L http://dbpedia.org/resource/Length Calculated Gibson Ian L stratigraphic depth Reconstr depth [m] (stratigraphic depth, Calculated) Mineral name Mineral X-ray diffraction (XRD) Optical tools & radiometric sensors X-ray diffractometers http://vocab.nerc.ac.uk/collection/L05/current/LAB26/ Gibson Ian L silica phase Mineral (silica phase, X-ray diffracti...) Heulandite Hul heulandite http://www.mindat.org/min-1889.html X-ray diffraction (XRD) Optical tools & radiometric sensors X-ray diffractometers http://vocab.nerc.ac.uk/collection/L05/current/LAB26/ Gibson Ian L heulandite/clinoptilolite, X = phase identified as present Hul (heulandite/clinoptilolite, X ...) Clay Clay clay http://purl.obolibrary.org/obo/ENVO_00002982 X-ray diffraction (XRD) Optical tools & radiometric sensors X-ray diffractometers http://vocab.nerc.ac.uk/collection/L05/current/LAB26/ Gibson Ian L numbers indicate the angstrom spacing of the major basal reflection of air-dried and glycolated samples Clay (numbers indicate the angstrom...) Mineral name Mineral X-ray diffraction (XRD) Optical tools & radiometric sensors X-ray diffractometers http://vocab.nerc.ac.uk/collection/L05/current/LAB26/ Gibson Ian L other Mineral (other, X-ray diffraction (XRD)) Plagioclase Pl X-ray diffraction (XRD) Optical tools & radiometric sensors X-ray diffractometers http://vocab.nerc.ac.uk/collection/L05/current/LAB26/ Gibson Ian L X = phase identified as present Pl (X = phase identified as prese...) Calcium carbonate CaCO3 % calcium carbonate http://purl.obolibrary.org/obo/CHEBI_3311 Dimensionless Ratio ψ Gibson Ian L CaCO3 [%] supplement citable author33616 basis5 campaign93 event13543 event13544 event13546 event13547 event13548 geocode1 geocode1599 geocode1600 geocode1601 geocode8128 inst34 license101 method10974 method12 method50 method5059 param14535 param18411 param24303 param45149 param48383 param55192 param70 param790 pi33616 project3 ref33914 term1073131 term1073207 term1074204 term20827 term2299415 term2663481 term38263 term41056 term41555 term43794 term43863 term44348 term67649