de.pangaea.dataset759426 und dataset PANGAEA

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https://www.pangaea.de/ information pointOfContact 2026-02-06T10:45:56Z https://doi.pangaea.de/10.1594/PANGAEA.759426 1991-01-01 publication https://doi.org/10.1594/PANGAEA.759426 Gibson, Ian L author PANGAEA

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https://www.pangaea.de/ information publisher tableDigital Supplement to: Gibson, Ian L (1991): Diagenesis, heat flow, and rifting at Broken Ridge, Indian Ocean. 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, 519-523, https://doi.org/10.2973/odp.proc.sr.121.164.1991 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. completed Gibson, Ian L principalInvestigator ODP Ocean Drilling Program theme 1995-01-01 creation PANGAEA

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https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-3.0: Creative Commons Attribution 3.0 Unported textTable und geoscientificInformation 93.5467 93.5899 -31.03 -30.839 1988-05-12T16:30:00 1988-05-24T07:30:00 45.5 406.8 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 thematicClassification Sample code/label thematicClassification DSDP/ODP/IODP sample designation Number thematicClassification XRD DEPTH, sediment/rock physicalMeasurement m m Depth, reconstructed physicalMeasurement Calculated; stratigraphic depth m m Mineral name thematicClassification X-ray diffraction (XRD); silica phase Heulandite thematicClassification X-ray diffraction (XRD); heulandite/clinoptilolite, X = phase identified as present Clay thematicClassification X-ray diffraction (XRD); numbers indicate the angstrom spacing of the major basal reflection of air-dried and glycolated samples Mineral name thematicClassification X-ray diffraction (XRD); other Plagioclase thematicClassification X-ray diffraction (XRD); X = phase identified as present Calcium carbonate physicalMeasurement % % text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.759426?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: 121-752B * LATITUDE: -30.891000 * LONGITUDE: 93.577500 * DATE/TIME START: 1988-05-18T09:00:00 * DATE/TIME END: 1988-05-22T12:30:00 * ELEVATION: -1097.0 m * Penetration: 435.6 m * Recovery: 112.34 m * LOCATION: South Indian Ridge, South Indian Ocean * CAMPAIGN: Leg121 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 17 cores; 158 m cored; 0 m drilled; 71.1 % recovery 1988-05-18T09:00:00 EVENT LABEL: 121-753A * LATITUDE: -30.839000 * LONGITUDE: 93.589900 * DATE/TIME START: 1988-05-12T16:30:00 * DATE/TIME END: 1988-05-13T06:15:00 * ELEVATION: -1187.0 m * Penetration: 62.8 m * Recovery: 61.06 m * LOCATION: South Indian Ridge, South Indian Ocean * CAMPAIGN: Leg121 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 7 cores; 62.8 m cored; 0 m drilled; 97.2 % recovery 1988-05-12T16:30:00 EVENT LABEL: 121-754A * LATITUDE: -30.941000 * LONGITUDE: 93.566500 * DATE/TIME START: 1988-05-13T18:30:00 * DATE/TIME END: 1988-05-15T05:15:00 * ELEVATION: -1075.0 m * Penetration: 172.1 m * Recovery: 128.27 m * LOCATION: South Indian Ridge, South Indian Ocean * CAMPAIGN: Leg121 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 23 cores; 170 m cored; 0 m drilled; 75.5 % recovery 1988-05-13T18:30:00 EVENT LABEL: 121-754B * LATITUDE: -30.941000 * LONGITUDE: 93.566500 * DATE/TIME START: 1988-05-15T05:15:00 * DATE/TIME END: 1988-05-18T05:40:00 * ELEVATION: -1076.0 m * Penetration: 354.7 m * Recovery: 91.85 m * LOCATION: South Indian Ridge, South Indian Ocean * CAMPAIGN: Leg121 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 24 cores; 232 m cored; 0 m drilled; 39.6 % recovery 1988-05-15T05:15:00 EVENT LABEL: 121-755A * LATITUDE: -31.030000 * LONGITUDE: 93.546700 * DATE/TIME START: 1988-05-22T15:00:00 * DATE/TIME END: 1988-05-24T07:30:00 * ELEVATION: -1069.0 m * Penetration: 208.4 m * Recovery: 80.21 m * LOCATION: South Indian Ridge, South Indian Ocean * CAMPAIGN: Leg121 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 19 cores; 178.4 m cored; 0 m drilled; 45 % recovery 1988-05-22T15:00:00