| 李赛赛.地物化综合方法寻找隐伏岩体—以广西西大明山隐伏岩体的发现为例[J].地质与勘探,2016,52(3):524-536 |
| 地物化综合方法寻找隐伏岩体—以广西西大明山隐伏岩体的发现为例 |
| Search for hidden rock bodies using geological, geophysical, and geochemical methods: An example from the West Damingshan area of Guangxi Province |
| 投稿时间：2015-10-19 修订日期：2016-03-04 |
| DOI： |
| 中文关键词: 隐伏岩体预测 地物化 钻孔验证 西大明山 广西 |
| 英文关键词: arcuate tectonic zone tectonic deformation hydrocarbon accumulation Qaidam basin |
| 基金项目:广西自然科学基金重点项目(编号:2015GXNSFDA139029)、2013年广西大规模地质矿产勘查项目(编号:桂财预函[2013]116号)和桂林理工大学人才引进科研启动基金项目(编号:002401003374)联合资助。 |
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| 摘要点击次数: 2042 |
| 全文下载次数: 271 |
| 中文摘要: |
| 广西西大明山地区是广西重要的整装勘查区之一。区内与岩浆活动密切相关的内生矿床丰富，然而仅在局部地表上发现少量的小型岩脉，区内隐伏岩体的预测研究一直是个难点。基于广西大规模地质矿产勘查项目，在成岩成矿理论的指导下，分析了该区域地质、地球物理、地球化学及遥感特征，确定了西大明山地区深部隐伏岩体的大致分布范围和埋藏深度。在区内选定了埋藏较浅的隐伏岩体预测靶区，采用高精度的地、物、化方法圈定隐伏岩体的具体位置。经验证。ZK31901、ZK40004钻孔分别在500m和960m以下发现了隐伏的黑云母花岗闪长岩，同时在隐伏岩体上部发现了具有工业价值的罗维钨铋矿床。预测靶区验证钻孔成功发现了岩体，为相邻地区的隐伏岩体预测工作提供了范例，而且对西大明山地区成矿系统、矿床成因的研究以及找矿勘查具有重要意义。 |
| 英文摘要: |
| Based on the data from field outcrops, drilling wells and fine seismic data interpretation, combined with analysis on the paleogeography, this paper presents a detailed study on late Cenozoic tectonic evolution and reservoir generation process in the west section of the northern margin of Qaidam Basin. The results suggest that this section consists of a series of arc-shaped thrust faults and folds along the front of the range. Since late Cenozoic, its tectonic evolution is featured by spreading from range-front to interior of the basin and propagating from either side to the middle. The hydrocarbon accumulation coupled well with the tectonic evolution process. Both sides of each arc-shaped tectonic zone formed earlier, with good combination of generation, storage, and cover as well as the background of ancient tectonics. These places indicate long-term direction of hydrocarbon migration and accumulation, which should be the priority of exploration targets in the future. |
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