胶莱盆地东北缘郭城—崖子金矿集区拆离构造控矿特征及成矿前景分析
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山东省地质调查院

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中图法分类号 P545 P617

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山东省自然科学基金面上项目(ZR2020MD033);山东省地质勘查项目(鲁勘字(2023)2号,鲁勘字(2023)3号,鲁勘字(2018)19号,鲁勘字(2019)1号)。


Ore-controlling characteristics and metallogenic prospect analysis of detachment structure in Guocheng-Yazi gold ore concentration area, northeastern margin of Jiaolai basinWang Ligong 1,2, Zhi yunbao 1 *, Wang Yingpeng 1
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Shandong Institute of Geological Survey

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    摘要:

    []胶莱盆地东北缘郭城—崖子地区位于牟平-乳山金成矿带南段,是胶东地区重要的金成矿区,近年来陆续探明了蓬家夼、土堆-沙旺、西井口、辽上、西涝口、前垂柳等中型?大型金矿床,累计探获金资源量超过180 t。本文在地质填图、含矿构造调查、可控源音频大地电磁测深(CSAMT)、槽探、钻探工程等野外工作的基础上,对矿体分布、物探特征、控矿构造和成矿规律进行分析,初步明确了蓬家夼拆离断裂的西延位置,从西井口-辽上,向西延伸到郭城断裂,为蓬家夼、西井口、西涝口、前垂柳、辽上等金矿的控矿构造。鹊山变质核杂岩及其拆离断裂为该区金成矿作用的主要控矿构造及有利赋矿空间,在今后的勘查找矿工作中应当加强研究。该地区金矿集区的成矿深度主要为5. 01~7. 93 km,金矿床整体刚被剥蚀出来,深部及外围具有良好的找矿潜力。

    Abstract:

    The Guocheng Yazi area on the northeast edge of the Jiaolai Basin is located in the southern section of the Mouping Rushan gold mineralization belt and is an important gold mineralization area in the Jiaodong region. In recent years, medium-sized and large gold deposits such as Pengjiakuang, Tudui Shawang, Xijingkou, Liaoshang, Xilaokou, and Qianchuiliu have been successively discovered, with a cumulative gold resource of over 180 tons. Based on the field work of geological mapping, investigation of ore bearing structures, controlled-source audio-frequency magnetotelluric sounding (CSAMT) , trough prospecting and drilling engineering, this paper analyzes the ore-body distribution, geophysical prospecting characteristics, ore-controlling structures and metallogenic regularity. It preliminarily clarifies the western extension position of the Pengjiakuang detachment fault, which extends westward from the Xijingkou to the Liaoshang to the Guocheng fault, serving as the ore control structures for gold deposits such as Pengjiakuang, Xijingkou, Xilaokou, and Liaoshang. The Queshan metamorphic core complex and its detachment faults are the main ore-controlling structures and favorable ore-forming spaces for gold mineralization in this area, and research should be strengthened in future exploration and prospecting work. The mineralization depth of the gold deposit concentration area in this area is mainly 5. 01-7. 93 km, and the gold deposit has just been eroded as a whole. The deep and peripheral areas have good prospecting potential.

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王立功,智云宝,王英鹏. 胶莱盆地东北缘郭城—崖子金矿集区拆离构造控矿特征及成矿前景分析[J]. 科学技术与工程, , ():

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  • 收稿日期:2024-03-20
  • 最后修改日期:2024-04-28
  • 录用日期:2024-05-21
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