Pyrolysis data of South Atlantic source rocks from 20 DSDP-ODP sites: Insight on source-rock potential

This data set consists of analytical results from the HAWK Pyrolysis and TOC instrument for 161 bulk samples from Mesozoic to Cenozoic strata at 20 DSDP-ODP sites in the South Atlantic region, from the Weddell Sea in the south to the Demerara Rise in the north, and in the Mozambique Ridge. Based on a revised chronostratigraphic and paleoenvironment framework (Setoyama and Kanungo, submitted), our pyrolysis results, combined with data published by previous studies, allow us to identify seven Mesozoic source-rock intervals: two in the Southern South Atlantic (SA), one in the Central SA and four in the Equatorial SA. Furthermore, these data also provide an estimate of the source-rock potential and quality of the identified intervals, which are influenced by depositional environments. A significant portion of the pyrolysis data is affected by the mineral matrix effect (MME) that artificially lowers the estimated potential and quality of source rocks. Further analyses are therefore required to correct the MME and for the proper identification of organic matter to ensure the reliable determination of organofacies, thereby facilitating improved source rock system evaluation.

搜集汇总

背景与挑战

背景概述

该数据集包含来自南大西洋地区20个DSDP-ODP站点的161个样品的热解分析数据，覆盖中生代到新生代地层，旨在评估源岩潜力和质量。数据识别出七个中生代源岩层段，但部分数据受矿物基质效应影响，需校正以确保可靠评价。数据集包括TOC、S1、S2等关键参数，共1288个数据点，发布于2019年，适用于有机地球化学研究。