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引用本文:汪正江 王 剑 尹福光 陈 明 熊国庆. 南羌塘侏罗纪盆地的沉积-构造转换与烃源岩[J]. 中国地质, 2006, 33(6): 1285-1291.
WANG Zheng-jiang, WANG Jian, YIN Fu-guang, CHEN Ming, XIONG Guo-qing. Depositional-tectonic transitions and hydrocarbon source rocks in the Jurassic southern Qiangtang basin[J]. Geology in China, 2006, 33(6): 1285-1291(in Chinese with English abstract).
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南羌塘侏罗纪盆地的沉积-构造转换与烃源岩
汪正江 王 剑 尹福光 陈 明 熊国庆
中国地质调查局成都地质矿产研究所,四川 成都 610082
摘要:
提要:沉积盆地层序地层和岩相古地理研究以及沉积-构造转换过程分析,是探讨沉积体系时空演化的重要思路。通过沉积-构造转换的分析,指出羌南地区在侏罗纪经历了从被动大陆边缘到夭折前陆,最后隆升剥蚀的演化历史;初步厘定了南羌塘地区烃源岩形成环境。在经历4次海侵的过程中,相应发育了两个陆源碎屑岩→碳酸盐岩沉积旋回。在这4次沉积-构造转换过程中,发育3套黑色页岩沉积:分别属于被动大陆边缘烃源岩和前陆盆地两个阶段烃源岩,是南羌塘侏罗纪盆地的油气评价的物质基础。
关键词:  侏罗纪  南羌塘盆地  沉积-构造转换  被动大陆边缘  夭折前陆  烃源岩
DOI:
分类号:
基金项目:中国地质调查局地质大调查项目(XQ-2004-06)资助。
Depositional-tectonic transitions and hydrocarbon source rocks in the Jurassic southern Qiangtang basin
WANG Zheng-jiang, WANG Jian, YIN Fu-guang, CHEN Ming, XIONG Guo-qing
Chengdu Institute of Geology and Mineral Resource, China Geological Survey, Chengdu 610082, Sichuan, China
Abstract:
Abstract:The analysis of the depositional-tectonic transition based on the study of the sequence stratigraphy and lithofacies-paleogeography is an important idea to study the temporal-spatial evolution of the depositional systems. From such an analysis, the authors find out that in the Jurassic southern Qiangtang went through the evolution from the passive continental margin through the failed foreland to an uplift which was finally eroded. The environment of formation of source rocks in southern Qiangtang has been preliminarily determined. During four marine transgressions there occurred two depositional cycles from terrigenous clastic rocks to carbonate rocks. During the four depositional-tectonic transitions, three sequences of black shale were developed, which belong to passive continental-margin source rocks (one sequence) and foreland source rocks (two sequences) respectively. They provide a material basis for petroleum evaluation of the Jurassic southern Qiangtang basin.
Key words:  Jurassic  southern Qiangtang basin  depositional-tectonic transition  passive continental margin  failed foreland basin  source rocks