干旱区生态环境知识资源中心(Arid): 准噶尔盆地玛湖凹陷下二叠统风城组碱湖古沉积背景

Arid

	准噶尔盆地玛湖凹陷下二叠统风城组碱湖古沉积背景
其他题名	Paleo-Sedimentary Setting of The Lower Permian Fengcheng Alkali Lake in Mahu Sag, Junggar Basin
	秦志军 1; 陈丽华 1; 李玉文 2; 王婷婷 3; 曹剑 3
来源期刊	新疆石油地质
ISSN	1001-3873
出版年	2016
卷号	37 期号:1 页码:1-6
中文摘要	准噶尔盆地玛湖凹陷下二叠统风城组发育全球最古老的碱湖优质烃源岩,但其古沉积背景尚未得到系统剖析,限制了对风城组发育模式与成烃演化的认识。通过岩石学与地球化学相结合的方法,研究了古沉积的地貌、气候、水深、盐度和水温等特征,结果表明,玛湖凹陷在风城组沉积期总体属于闭塞型湖泊,古地貌表现为西陡东缓的不对称箕状凹陷,凹陷中分布有大小不等的湖湾;风城组沉积期碱湖形成的气候条件为半干旱,蒸发量大于补给量,并且季节性的潮湿环境与干旱环境相交替;古水深总体较浅,发育深色细粒的烃源岩;古水体为高盐度水介质,风城组二段盐度最高,指示风城组二段沉积时期碱湖最发育;古水温较高,相当于暖相-偏暖相。
英文摘要	The high-quality hydrocarbon source rocks of the world’s most ancient alkali lake are found in the Lower Permian Fengcheng formation of Junggar basin. The understanding of development model and hydrocarbon-forming evolution of the Fengcheng formation have been limited due to unsystematic analysis about its paleo - sedimentary setting up to now. This paper uses petrological and geochemical methods to study the characteristics of its landform, climate, lake water depth, salinity and water temperature, and the results show that Mahu sag is a closed lake in the depositional stage of Fengcheng formation as a whole, and its ancient landform appears asymmetric halfgraben-like sag with steep slope in the west and gentle slope in the east, and the sizes of lake bays are distributed in it; the climatic condition of the alkali lake formation in this stage is semi-arid, characterized by that the evaporation was greater than the recharge, with seasonal humid-arid-alternate environment; the lake water depth is shallow in general, developing dark fine-grained source rocks; the water body is of high-salinity medium, the highest salinity occurs in second member of Fengcheng formation, indicating the alkali lake is most developed in this member; and the paleotemperature of the water body is relatively high, equivalent to warm to partial warm phase.
中文关键词	准噶尔盆地 ; 玛湖凹陷 ; 风城组 ; 碱湖 ; 古沉积环境 ; 古水深 ; 古水体盐度 ; 古水温
英文关键词	Junggar basin Mahu sag Fengcheng formation alkali lake paleo - sedimentary environment paleo-water depth paleo-water salinity paleo-water temperature
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENERGY FUELS
WOS研究方向	Energy & Fuels
CSCD记录号	CSCD:5626159
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235203
作者单位	1.中国石油新疆油田分公司勘探开发研究院, 克拉玛依, 新疆 834000, 中国; 2.中国石油勘探开发研究院杭州分院, 杭州, 浙江 310023, 中国; 3.南京大学地球科学与工程学院, 南京, 江苏 210023, 中国
推荐引用方式 GB/T 7714	秦志军,陈丽华,李玉文,等. 准噶尔盆地玛湖凹陷下二叠统风城组碱湖古沉积背景[J],2016,37(1):1-6.
APA	秦志军,陈丽华,李玉文,王婷婷,&曹剑.(2016).准噶尔盆地玛湖凹陷下二叠统风城组碱湖古沉积背景.新疆石油地质,37(1),1-6.
MLA	秦志军,et al."准噶尔盆地玛湖凹陷下二叠统风城组碱湖古沉积背景".新疆石油地质 37.1(2016):1-6.