| 新疆北部扎河坝坳陷上二叠统沉积环境 |
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| 作者姓名： | 文磊 孙相灿 周新桂 易立 李清瑶 高永进 龚晓星 郭坤 |
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| 作者单位： | 1.中国地质调查局油气资源调查中心,北京 100083;2.中国地质调查局北京探矿工程研究所,北京 100083 |
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| 基金项目： | 中国地质调查局“新疆西部地区油气地质调查(编号: DD20190090)”和“准噶尔盆地及周缘油气基础地质调查(编号: DD20160170)”项目联合资助 |
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| 摘 要： | 扎河坝坳陷位于阿尔泰造山带与准噶尔盆地之间,属于中亚造山带的一部分,自早古生代以来经历了准噶尔洋盆的打开和闭合等阶段,富含煤炭和金属矿产,也具有一定的油气勘探前景。研究区火山岩和含煤层系发育,地表风化剥蚀严重,对研究其地层发育特征和沉积环境起到了一定的制约。对扎河坝坳陷新富地1井岩芯样品开展沉积岩微量元素测试,分析结果表明,扎河坝坳陷上二叠统为温暖湿润的淡水沉积环境,表明扎河坝坳陷晚二叠世经历了火山活动和陆相淡水沉积2个阶段,印证了准噶尔洋由俯冲消减向陆内阶段转换的过程。该研究对恢复研究区构造演化及沉积古地理特征具有重要意义。
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| 关 键 词： | 扎河坝坳陷 上二叠统 沉积环境 微量元素 |
| 收稿时间： | 2019-04-04 |
Sedimentary environment of Upper Permian in Zhaheba Depression of Northern Xinjiang |
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| Authors: | WEN Lei SUN Xiangcan ZHOU Xingui YI Li LI Qingyao GAO Yongjin GONG Xiaoxing GUO Kun |
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| Institution: | 1. Oil & Gas Survey, China Geological Survey, Beijing 100083, China;2. Beijing Institute of Exploration Engineering, China Geological Survey, Beijing 100083, China |
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| Abstract: | Zhaheba Depression is located between Altay Mountains and Junggar Basin, belonging to the Center Asian Orogeny belts. Zhaheba Depression has undergone the opening and closing phrases of the Junggar oceanic basin, which is rich in coal and metallic mineral resources, and has certain prospects for oil and gas exploration. Volcanic rocks and coal-bearing strata were well developed in this area, and the surface weathering and erosion were quite serious, which restricted the study of the stratigraphic characteristics and sedimentary environment. Through the test analysis of the trace element of the core samples of the well Xinfudi 1 in Zhaheba Depression, the authors thought that the Upper Permian in Zhaheba area was in a warm and humid freshwater sedimentary environment. And the sedimentary source of Zhangheba Depression mainly comes from the northeastern Altay Mountains and the southwestern Wulungu ancient land, and the depression belongs to the intermountain depression formed in the late Late Permian. This provides a basis for the subsequent study of the Late Permian tectonic-sedimentary evolution in the study area. |
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| Keywords: | Zhaheba Depression Upper Permian sedimentary environment trace element |
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