| 黑龙江东部林口地区下白垩统穆棱组砾岩的成因及其意义 |
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| 引用本文： | 张云鹏,任建业,赵学钦,汤艳,王珊,杨承志.黑龙江东部林口地区下白垩统穆棱组砾岩的成因及其意义[J].中国区域地质,2012(10):1731-1738. |
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| 作者姓名： | 张云鹏 任建业 赵学钦 汤艳 王珊 杨承志 |
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| 作者单位： | [1]中国地质调查局西安地质调查中心,陕西西安710054 [2]中国地质大学（武汉）资源学院,湖北武汉430074 [3]西南科技大学环境与资源学院,四川绵阳621010 [4]长安大学地球科学与资源学院,陕西西安710054 [5]中国石油勘探开发研究院,北京100083 |
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| 基金项目： | 科技部国家重大科技专项《复杂含油气盆地构造及其控油气作用》（编号：2011zx05009-001） |
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| 摘 要： | 大三江地区是中国东部重要的油气资源接替区,早白垩世时期该地区曾为一个统一的盆地,之后盆地遭受破坏分解。如何确定当时的盆地边界进而恢复盆地原型,是该地区亟待解决的关键地质问题之一。前人对盆地边界的确定大都以理论推测为主,缺乏实际证据。本次工作在黑龙江林口地区发现一套穆棱组底部砾岩,对砾石进行成分及分选特征、沉积特征等的统计与分析,结合古水流恢复和地震解释资料,认为该套砾岩整体为冲积扇相,以河道砾岩沉积和漫流砾岩沉积为主,物源主要来自盆地西部的张广才岭。结合地震资料分析,认为研究区穆棱组时期的沉积模型为冲积扇相向滨浅湖亚相的直接过渡。本研究不仅为大三江盆地西部边界的确定提供了直接证据,同时也为该地区今后的油气勘探指明了方向。
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| 关 键 词： | 黑龙江大三江地区 砾岩成因 沉积模型 边缘相 盆地边界 |
Genesis and significance of conglomerate in Lower Cretaceous Muling Formation of Linkou area, Heilongjiang Province. |
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| ZHANG Yun-peng,REN Jian-ye,ZHAO Xue-qin,TANG Yan,WANG Shan,YANG Cheng-zhi.Genesis and significance of conglomerate in Lower Cretaceous Muling Formation of Linkou area, Heilongjiang Province.[J].Regional Geology of China,2012(10):1731-1738. |
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| Authors: | ZHANG Yun-peng REN Jian-ye ZHAO Xue-qin TANG Yan WANG Shan YANG Cheng-zhi |
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| Institution: | 1. Xi＇ an Geological Survey Center, China Geological Survey, Xi＇ an 710054, Shaanxi, China; 2. Faculty of Earth Resources, China University of Geosciences, Hubei 430074, , Wuhan China; 3. School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China;4. College of Earth Science and Land Resources, Chang＇an University, Xi＇an 710064, Shaanxi, China; 5. Research Institute of Petroleum Exploration ＆ Development, Beijing 100083, China |
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| Abstract: | Great Sanjiang region is an important oil and gas resources succeeding district in eastern China. During the Early Cretaceous period, this region was once a unified lake basin, and then broken up. The problem as to the determination of the basin boundary and the reconstruction of the basin prototype is one of the key geological problems in this region. Previous study on the basin boundary was mainly focused on theoretical speculation and seemed lack of actual evidence. In this study, a set of conglomerates was found at the bottom of Muling Formation in Linkou basin. Based on an analysis of gravel composition and sorting as well as sedimentary char- acteristics, combined with the paleocurrent recovery and seismic data interpretation, the authors have concluded that the set of con- glomerate is on the whole of alluvial fan facies, the river conglomerate deposition and overflow conglomerate deposition constitute thedominant depositions, and the provenance mainly came from the Zhangguangcai Mountain in the west of the basin. Combined with the seismic data analysis, it is held that the deposition model of the study area was the direct transition from the alluvial fan to the shal- low lake subfacies in the period of Muling Formation. This study not only provides direct evidence for the determination of the west- ern border of the Great San.jiang Basin, but also points out the direction for the future oil and gas exploration in this region. |
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| Keywords: | Great Sanjiang region of Heilongjiang Province geneSis of conglomerate deposition model marginal facies basin boundary |
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