Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.marpetgeo.2015.03.003 |
The origin, type and preservation of organic matter of the Barremian-Aptian organic-rich shales in the Muglad Basin, Southern Sudan, and their relation to paleoenvironmental and paleoclimate conditions | |
Makeen, Yousif M.1; Hakimi, Mohammed Hail2; Abdullah, Wan Hasiah1 | |
通讯作者 | Hakimi, Mohammed Hail |
来源期刊 | MARINE AND PETROLEUM GEOLOGY |
ISSN | 0264-8172 |
EISSN | 1873-4073 |
出版年 | 2015 |
卷号 | 65页码:187-197 |
英文摘要 | Barremian-Aptian organic-rich shales from Abu Gabra Formation in the Muglad Basin were analysed using geochemical and petrographic analyses. These analyses were used to define the origin, type of organic matters and the influencing factors of diagenesis, including organic matter input and preservation, and their relation to paleoenvironmental and paleoclimate conditions. The bulk geochemical characteristics indicated that the organic-rich shales were deposited in a lacustrine environment with seawater influence under suboxic conditions. Their pyrolysis hydrogen index (HI) data provide evidence for a major contribution by Type I/II kerogen with HI values of >400 mg HC/g TOC and a minor Type II/III contribution with HI values <400 mg HC/g TOC. This is confirmed by kerogen microscopy, whereby the kerogen is characterized by large amounts of structured algae (Botryococcus) and structureless (amorphous) with a minor terrigenous organic matter input. An enhanced biological productivity within the photic zone of the water columns is also detected. The increased biological productivity in the organic-rich shales may be related to enhanced semi-arid/humid to humid-warm climate conditions. Therefore, a high bio-productivity in combination with good organic matter preservation favoured by enhanced algae sizes are suggested as the OM enrichment mechanisms within the studied basin. (C) 2015 Elsevier Ltd. All rights reserved. |
英文关键词 | Organic-rich shale Bioproductivity OM preservation Muglad Basin Sudan |
类型 | Article |
语种 | 英语 |
国家 | Malaysia ; Yemen |
收录类别 | SCI-E |
WOS记录号 | WOS:000357229700013 |
WOS关键词 | NE CHINA IMPLICATIONS ; OIL-SHALE ; PETROGRAPHIC CHARACTERIZATION ; ATLANTIC OCEAN ; INTERIOR SUDAN ; CARBON ; SEDIMENTS ; WESTERN ; AREA ; PRODUCTIVITY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/189167 |
作者单位 | 1.Univ Malaya, Dept Geol, Kuala Lumpur 50603, Malaysia; 2.Taiz Univ, Fac Sci Appl, Dept Geol, Taizi 6803, Yemen |
推荐引用方式 GB/T 7714 | Makeen, Yousif M.,Hakimi, Mohammed Hail,Abdullah, Wan Hasiah. The origin, type and preservation of organic matter of the Barremian-Aptian organic-rich shales in the Muglad Basin, Southern Sudan, and their relation to paleoenvironmental and paleoclimate conditions[J],2015,65:187-197. |
APA | Makeen, Yousif M.,Hakimi, Mohammed Hail,&Abdullah, Wan Hasiah.(2015).The origin, type and preservation of organic matter of the Barremian-Aptian organic-rich shales in the Muglad Basin, Southern Sudan, and their relation to paleoenvironmental and paleoclimate conditions.MARINE AND PETROLEUM GEOLOGY,65,187-197. |
MLA | Makeen, Yousif M.,et al."The origin, type and preservation of organic matter of the Barremian-Aptian organic-rich shales in the Muglad Basin, Southern Sudan, and their relation to paleoenvironmental and paleoclimate conditions".MARINE AND PETROLEUM GEOLOGY 65(2015):187-197. |
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