Meyers, Philip A; Yum, Jong-Gwon; Wise, Sherwood W (2009): (Table 1) Carbon and nitrogen chemistry of ODP Hole 183-1138A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.817646, Supplement to: Meyers, PA et al. (2009): Origins and maturity of organic matter in mid-Cretaceous black shales from ODP Site 1138 on the Kerguelen Plateau. Marine and Petroleum Geology, 26(6), 909-915, https://doi.org/10.1016/j.marpetgeo.2008.09.003
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Abstract:
We have conducted elemental, isotopic, and Rock-Eval analyses of Cenomanian-Santonian sediment samples from ODP Site 1138 in the southern Indian Ocean to assess the origin and thermal maturity of organic matter in mid-Cretaceous black shales found at this high-latitude location. Total organic carbon (TOC) concentrations range between 1 and 20 wt% in black to medium-gray sediments deposited around the Cenomanian-Turonian boundary. Results of Rock-Eval pyrolysis indicate that the organic matter is algal Type II material that has experienced modest alteration. Important contributions of nitrogen-fixing bacteria to the amplified production of organic matter implied by the high TOC concentrations is recorded in d15N values between -5 and 1 per mil , and the existence of a near-surface intensified oxygen minimum zone that favored organic carbon preservation is implied by TOC/TN ratios between 20 and 40. In contrast to the marine nature of the organic matter in the Cenomanian-Turonian boundary section, deeper sediments at Site 1138 contain evidence of contributions land-derived organic matter that implies the former presence of forests on the Kerguelen Plateau until the earliest Cenomanian.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -53.551750 * Longitude: 75.974880
Date/Time Start: 1999-01-07T23:30:00 * Date/Time End: 1999-01-31T06:15:00
Minimum DEPTH, sediment/rock: 626.26 m * Maximum DEPTH, sediment/rock: 682.17 m
Event(s):
183-1138A * Latitude: -53.551750 * Longitude: 75.974880 * Date/Time Start: 1999-01-07T23:30:00 * Date/Time End: 1999-01-31T06:15:00 * Elevation: -1141.4 m * Penetration: 842.7 m * Recovery: 411.98 m * Location: Indian Ocean * Campaign: Leg183 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 89 cores; 842.7 m cored; 0 m drilled; 48.9 % recovery
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
473 data points