干旱区生态环境知识资源中心(Arid): Geochemical characteristics of the Silurian shales from the central Taurides, southern Turkey: Organic matter accumulation, preservation and depositional environment modeling

Arid

DOI	10.1016/j.marpetgeo.2018.12.042
	Geochemical characteristics of the Silurian shales from the central Taurides, southern Turkey: Organic matter accumulation, preservation and depositional environment modeling
	Doner, Zeynep 1; Kumral, Mustafa 1; Demirel, Ismail Hakki 2; Hu, Qinhong 3
通讯作者	Doner, Zeynep ; Hu, Qinhong
来源期刊	MARINE AND PETROLEUM GEOLOGY
ISSN	0264-8172
EISSN	1873-4073
出版年	2019
卷号	102 页码:155-175
英文摘要	The Silurian-age organic-rich and organic-lean shales, located within Aydincik, Gulnar and Silifke districts of Mersin province in central Taurides, southern Turkey, is considered as an unconventional resources. These organic-rich and-lean shales are controlled by the similar geological, tectonic and sedimentary processes, as the passive margin basin has acted as the provenance region throughout the deposition of these shales. Geochemical data of major and trace elements obtained for a total of 39 outcrop samples were interpreted to determine the depositional model, water column productivity, amount of organic matter and preservation conditions. Total organic carbon (TOC) values of these organic-rich and-lean shales range from 0.56 to 4.06 wt. % and 0.01 to 0.38 wt. %. Several redox indicators, such as V systematics (V/Sc, V/Ni) as well as ratios of Ni/Co, Th/U and Mo/Mn, showed that the organic-rich shales were deposited in suboxic to anoxic environments, as opposed to oxic-dysoxic conditions for organic-lean ones. However, organic matter enrichment is not restrained by water column productivity, as indicated by a lack of correlation between TOC and productivity indexes (P/Ti and Ba/Al), but rather probably controlled by dysoxic-anoxic water column environment. In addition, a detrital material input cannot be ignored for its influence on organic matter enrichment in the shale deposition. The increase in the elastic fluxes probably resulted from the deposition in the extended shelf with coastal upwelling. A lack of correlation between K2O, Al2O3, SiO2 and TOC contents among these shales imply that clay minerals may not influence organic matter preservation. According to w(La)(N)/w(Yb)(N) and Sigma REE values, a high sedimentation rate is determined during the shale deposition, which would result in a dilution of organic matter. Furthermore, slight marine influences with sulphur limitation and low salinity, semi-arid/warm to humid-warm climatic conditions are widespread, according to total sulphur (TS), Sr/Ba, Sr/Cu, chemical index of alteration (CIA), C-value and related discrimination diagrams. In the end, a depositional model of the central Taurides shales is established to display an excellent preservation condition as the major controlling factor for organic matter enrichment in the Silurian shales.
英文关键词	Silurian shale Central Taurides Turkey Organic matter Redox condition Depositional environment Preservation model
类型	Article
语种	英语
国家	Turkey ; USA
收录类别	SCI-E
WOS记录号	WOS:000464086400013
WOS关键词	CARBON-RICH SEDIMENTS ; BLACK SHALES ; APPALACHIAN BASIN ; OCEANIC ANOXIA ; NORTH-AFRICA ; SOURCE ROCKS ; HOT SHALES ; TRACE ; PRODUCTIVITY ; ORDOVICIAN
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/2XILL650/217547
作者单位	1.Istanbul Tech Univ, Fac Mines, Dept Geol Engn, Istanbul, Turkey; 2.Hacettepe Univ, Fac Engn, Dept Geol Engn, Ankara, Turkey; 3.Univ Texas Arlington, Dept Earth & Environm Sci, Arlington, TX 76019 USA
推荐引用方式 GB/T 7714	Doner, Zeynep,Kumral, Mustafa,Demirel, Ismail Hakki,et al. Geochemical characteristics of the Silurian shales from the central Taurides, southern Turkey: Organic matter accumulation, preservation and depositional environment modeling[J],2019,102:155-175.
APA	Doner, Zeynep,Kumral, Mustafa,Demirel, Ismail Hakki,&Hu, Qinhong.(2019).Geochemical characteristics of the Silurian shales from the central Taurides, southern Turkey: Organic matter accumulation, preservation and depositional environment modeling.MARINE AND PETROLEUM GEOLOGY,102,155-175.
MLA	Doner, Zeynep,et al."Geochemical characteristics of the Silurian shales from the central Taurides, southern Turkey: Organic matter accumulation, preservation and depositional environment modeling".MARINE AND PETROLEUM GEOLOGY 102(2019):155-175.