| 珠江口盆地花岗岩成因探讨及其对油气资源指示
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| 引用本文： | 刘安,吴世敏.珠江口盆地花岗岩成因探讨及其对油气资源指示
意义[J].地学前缘,2011,18(1):141-148. |
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| 作者姓名： | 刘安 吴世敏 |
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| 作者单位： | 1中国地质调查局 武汉地质矿产研究所, 湖北 武汉 430205
2中山大学 地球科学系, 广东 广州 510275 |
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| 基金项目： | 国家重点基础研究发展计划"973"项目，国家自然科学基金，中国地质调查局计划项目 |
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| 摘 要： | 珠江口盆地燕山期花岗岩地球化学、地球物理等特征分析表明,其形成缘于中生代太平洋板块向华南大陆的俯冲,并引起华南大陆边缘岩石圈等温面上隆及上地壳硅铝质岩石的多次重熔。花岗岩层形成后的区域性剥蚀作用导致盆地隆起部位花岗岩穹窿和背斜的形成;此后,新生代沉积物覆盖在花岗岩背斜和穹窿之上并形成披覆背斜,该类构造为珠江口盆地重要的含油气构造类型。在中生代时,东沙隆起及其以北具有高地温场,花岗岩发育的特点;南部坳陷带则表现低地温场和中生代沉积等特点。中生代烃源岩演化程度相对较低,它在新生代时期具备二次生烃的可能性。
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| 关 键 词： | 原地重熔 珠江口盆地 花岗岩 披覆背斜 二次生烃 |
| 收稿时间： | 2010-11-30 |
A discussion on the formation of granite in the Pearl River Mouth Basin and its implication to hydrocarbon resource |
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| Liu An,Wu Shimin.A discussion on the formation of granite in the Pearl River Mouth Basin and its implication to hydrocarbon resource[J].Earth Science Frontiers,2011,18(1):141-148. |
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| Authors: | Liu An Wu Shimin |
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| Institution: | 1Wuhan Institute of Geology and Mineral Resources, China Geological Survey, Wuhan 430223, China;
2Department of Earth Sciences, Sun Yat Sen University, Guangzhou 510275, China |
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| Abstract: | The analysis of the geochemical and geophysical characteristics of Yanshan Period granite in the Pearl River Mouth Basin suggested that the uplifting of the lithosphere isothermal surface and multiple melting of the upper crust,which resulted from the subduction of the Pacific plate under the South China plate,gave rise to the formation of the granite.The granite dome and drape anticline on the uplifting part of the basin was formed by the regional erosion and the sedimentation in the Cenozoic afterwards.Th... |
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| Keywords: | in-situ melting Pearl River Mouth Basin granite drape anticline secondary hydrocarbon generation |
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