鄂尔多斯盆地本溪组沉积物物源探讨及其构造意义
- 贾浪波1,
- 钟大康1, ,
- 孙海涛1,
- 严锐涛2,
- 张春林3,
- 莫午零3,
- 邱存1,
- 董媛1,
- 李兵1,
- 廖广新4
- 1. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249;
- 2. 西安石油大学地球科学与工程学院, 西安 710000;
- 3. 中国石油勘探开发研究院, 河北廊坊 065000;
- 4. 中石化江汉油田分公司采气工程技术服务中心, 湖北潜江 433124
基金项目:
国家自然科学基金项目（41072104）；国家科技重大专项（2016ZX05002）；长庆油田5000万吨持续高效稳产关键技术研究与应（2016E-05-02）
作者简介:
贾浪波,男,1990年出生,博士,沉积学及古地理学,E-mail:641159268@qq.com
- 收稿日期:
2018-10-29
- 修回日期:
2019-01-29
- 刊出日期:
2019-10-10
摘要: 鄂尔多斯盆地在经历了古生代抬升剥蚀之后，在晚古生代晚期开始沉降并沉积了海陆过渡相本溪组碎屑岩。为阐明该套碎屑岩的物源体系特征，基于露头、岩芯、分析化验等多种分析测试手段，分析了本溪组砾岩分布、轻矿物碎屑组分、石英阴极发光、重矿物特征及碎屑锆石U-Pb年龄分布特征，识别了本溪组平面上不同物源体系，继而确定了不同物源体系的母岩类型及本溪组沉积时期盆地南部构造演化特征；研究表明本溪组沉积时期，鄂尔多斯盆地整体南北双向供源，其中北部物源供给相对较强，进一步划分为四个子物源体系，西北物源母岩主要为变质岩和少量火山岩，东北部地区母岩主要为酸性侵入岩，西南部地区物源主要为高级变质岩、部分岩浆岩和少量沉积岩，东南部地区主要为高级变质岩。同时在本溪组沉积时期，南部物源影响范围可达盆地中部地区，北秦岭陆块该时期已与华北板块南缘发生碰撞是南部物源体系重要组成部分。
Sediment Provenance Analysis and Tectonic Implication of the Benxi Formation,Ordos Basin
- JIA LangBo
1,
- ZHONG DaKang
1, ,
- SUN HaiTao
1,
- YAN RuiTao
2,
- ZHANG ChunLin
3,
- MO WuLing
3,
- QIU Cun
1,
- DONG Yuan
1,
- LI Bing
1,
- LIAO GuangXin
4
- 1. State Key Laboratory of Petroleum Resources and Prospecting in China University of Petroleum, Beijing 102249, China;
- 2. College of Earth Sciences and Engineering, Xi'an Shiyou University, Xi'an 710000, China;
- 3. PetroChina Research Institute of Petroleum Exploration & Development, Langfang, Hebei 065000, China;
- 4. Gas Production Engineering Service Center of SINOPEC Jianghan Oilfield Company, Qianjiang, Hubei 433124, China
Funds:
National Natural Science Foundation of China, No. 41072104; National Science and Technology Major Project, No.2016 ZX05002; Research and Application of Key Technologies for Sustainable High-efficiency and Stable Production of 50 Million Tons in Changqing Oilfield, No. 2016E-05-02
- Received Date:
2018-10-29
- Rev Recd Date:
2019-01-29
- Publish Date:
2019-10-10
Abstract: The Ordos Basin experienced uplift and bending in the Paleozoic,then started to subside and deposit the sea-land transition phase clastics of the Benxi Formation. Data from outcrops,cores and various analytical testing tools were used to clarify the provenance of the Benxi Formation,including conglomerate distribution,light mineral debris component,quartz cathodoluminescence,heavy mineral suites,stability coefficient and zircon ages. Different provenance systems were recognized from consistent source-rock types from different sources,as well as the tectonic evolutionary history of the southern part of the basin. The study revealed two main provenance systems,which were further subdivided into four systems,two in the northern basin and two in the south. The northern provenance supply ability was found to be greater than in the south. The source rocks of the NW provenance were metamorphics,together with a small amount of volcanic rocks. The NE source rocks were acidic intrusives. The SW source rocks were highgrade metamorphics,with some magmatic rocks and a small proportion of sedimentary rocks. The SE source rocks were high-grade metamorphics. During deposition of the Benxi formation,the southern provenance extended as far as the center of the basin. A main component of the southern provenance system at that time was the collision of the North Qinling terrace and the North China Block.
贾浪波, 钟大康, 孙海涛, 严锐涛, 张春林, 莫午零, 邱存, 董媛, 李兵, 廖广新. 鄂尔多斯盆地本溪组沉积物物源探讨及其构造意义[J]. 沉积学报, 2019, 37(5): 1087-1103. doi: 10.14027/j.issn.1000-0550.2019.014
| 引用本文: |
贾浪波, 钟大康, 孙海涛, 严锐涛, 张春林, 莫午零, 邱存, 董媛, 李兵, 廖广新. 鄂尔多斯盆地本溪组沉积物物源探讨及其构造意义[J]. 沉积学报, 2019, 37(5): 1087-1103. doi: 10.14027/j.issn.1000-0550.2019.014
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JIA LangBo, ZHONG DaKang, SUN HaiTao, YAN RuiTao, ZHANG ChunLin, MO WuLing, QIU Cun, DONG Yuan, LI Bing, LIAO GuangXin. Sediment Provenance Analysis and Tectonic Implication of the Benxi Formation,Ordos Basin[J]. Acta Sedimentologica Sinica, 2019, 37(5): 1087-1103. doi: 10.14027/j.issn.1000-0550.2019.014
| Citation: |
JIA LangBo, ZHONG DaKang, SUN HaiTao, YAN RuiTao, ZHANG ChunLin, MO WuLing, QIU Cun, DONG Yuan, LI Bing, LIAO GuangXin. Sediment Provenance Analysis and Tectonic Implication of the Benxi Formation,Ordos Basin[J]. Acta Sedimentologica Sinica, 2019, 37(5): 1087-1103. doi: 10.14027/j.issn.1000-0550.2019.014
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