沉积与特提斯地质Issue(1)：43-49,7.
藏北羌塘盆地角木茶卡地区下二叠统展金组烃源岩特征及意义
Characteristics and significance of the source rocks from the Lower Permian Zhanjin Formation in the Jiaomuchaka area, Qiangtang Basin, northern Xizang
摘要
Abstract
The tuffaceous source rocks are found to be hosted in the Lower Permian Zhanjin Formation in the Jiaomuchaka area near the central uplift of the Qiangtang Basin,northern Xizang. The integration of abundance, type and maturity of the organic matter in this study has disclosed that the total organic carbon contents in the tuffaceous source rocks range between 0 . 35% and 0 . 98%, within the limits of standards coming up to the medium-grade maturity of source rocks. The microscopic examination and element and carbon isotope analyses for the kerogens indicate that the organic matter types are represented by sapropel-humic ( II2 type) and humic ( III type) . The vitrinite reflectances (Ro) for the source rocks vary from 1. 54% to 1. 59%. The pyrolytic peak temperatures ( Tmax ) range between 467 and 530℃. Meanwhile, the sapropelinite in the kerogens exhibits brownish yellow in colour. The above-mentioned results show that the thermal evolution of organic matter has now reached up to the higher maturity levels of the source rocks, and thus the source rocks have good hydrocarbon-generating potential in the study area.关键词
羌塘盆地/角木茶卡地区/烃源岩/展金组/早二叠世Key words
Qiangtang Basin/Jiaomuchaka/source rock/Zhanjin Formation/Early Permian分类
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陈文彬,付修根,占王忠,冯兴雷,宋春彦,曾胜强..藏北羌塘盆地角木茶卡地区下二叠统展金组烃源岩特征及意义[J].沉积与特提斯地质,2015,(1):43-49,7.基金项目
国家油气专项“青藏高原重点盆地油气资源战略选区”项目( XQ-2009-1)及天然气水合物试采专项羌塘盆地天然气水合物资源勘查(形成条件及控矿因素研究)联合资助 （ XQ-2009-1）
