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Ali, Sajid; Hathorne, Ed C; Frank, Martin (2021): Radiogenic Sr, Nd and Pb isotope data and clay mineral abundances of the < 2 µm size fraction of ODP Hole 121-758A. PANGAEA, https://doi.org/10.1594/PANGAEA.927027

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Abstract:
The clay size fraction of the sediments from ODP Site 758 located in the southern Bay of Bengal on top of the Ninetyeast Ridge were studied to better understand South Asian Monsoon induced silicate weathering over the last 27 million years. The radiogenic Sr, Nd and Pb isotope data were measured by multi-collector ICP-MS and the the clay mineral abundances were calculated from X-Ray diffraction measurements. The age model used here incorporates age constraints from both ODP Site 758 and new data from a new multiple hole drill site nearby (International Ocean Discovery Program Site U1443).
Keyword(s):
clay minerals; Clay radiogenic Sr Nd and Pb isotopes
Supplement to:
Ali, Sajid; Hathorne, Ed C; Frank, Martin (2021): Persistent provenance of South Asian Monsoon induced silicate weathering over the past 27 million years. Paleoceanography and Paleoclimatology, 36(3), e2020PA003909, https://doi.org/10.1029/2020PA003909
Coverage:
Latitude: 5.384200 * Longitude: 90.361200
Date/Time Start: 1988-06-15T23:50:00 * Date/Time End: 1988-06-24T13:30:00
Minimum DEPTH, sediment/rock: 1.0 m * Maximum DEPTH, sediment/rock: 204.0 m
Event(s):
121-758A * Latitude: 5.384200 * Longitude: 90.361200 * Date/Time Start: 1988-06-15T23:50:00 * Date/Time End: 1988-06-24T13:30:00 * Elevation: -2935.0 m * Penetration: 676.8 m * Recovery: 453.83 m * Location: Indian Ocean * Campaign: Leg121 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 73 cores; 676.8 m cored; 0 m drilled; 67.1 % recovery
Comment:
Clay mineral abundances in weighted peak area percentage.
The repeatability of the semi-quantitative clay mineral measurements was approximately 2%.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Sample code/labelSample labelHathorne, Ed CDSDP/ODP/IODP sample designation
2HoleHHathorne, Ed C
3CoreCoreHathorne, Ed C
4TypeTypeHathorne, Ed C
5SectionSectHathorne, Ed C
6Interval numberInterval NoHathorne, Ed Ccm
7DEPTH, sediment/rockDepthmHathorne, Ed CGeocode – mbsf
8AGEAgeka BPHathorne, Ed CGeocode
9ε-Neodymiumε-NdHathorne, Ed CMulti-Collector ICP-MS (MC-ICP-MS)representative 2SD error = ±0.20
10Strontium-87/Strontium-8687Sr/86SrHathorne, Ed CMulti-Collector ICP-MS (MC-ICP-MS)representative 2SD error = ±0.00003
11Lead-208/Lead-204 ratio208Pb/204PbHathorne, Ed CMulti-Collector ICP-MS (MC-ICP-MS)representative 2SD error = ±0.0152
12Lead-207/Lead-204 ratio207Pb/204PbHathorne, Ed CMulti-Collector ICP-MS (MC-ICP-MS)representative 2SD error = ±0.0062
13Lead-206/Lead-204 ratio206Pb/204PbHathorne, Ed CMulti-Collector ICP-MS (MC-ICP-MS)representative 2SD error = ±0.0064
14Lead-208/Lead-206 ratio208Pb/206PbHathorne, Ed CMulti-Collector ICP-MS (MC-ICP-MS)representative 2SD error = ±0.0002
15Lead-207/Lead-206 ratio207Pb/206PbHathorne, Ed CMulti-Collector ICP-MS (MC-ICP-MS)representative 2SD error = ±0.00006
16SmectiteSme%Hathorne, Ed CX-ray diffraction (XRD)
17IlliteIll%Hathorne, Ed CX-ray diffraction (XRD)
18KaoliniteKln%Hathorne, Ed CX-ray diffraction (XRD)
19ChloriteChl%Hathorne, Ed CX-ray diffraction (XRD)
Size:
617 data points

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