摘要
老挝帕奔金矿区位于区域性奠边府—琅勃拉邦断裂带的旁侧,受NE-NNE向韧脆性剪切带的控制,在下二叠系灰岩中产有构造破碎蚀变岩型金矿和含金方解石型脉金矿,全区分为6个矿化带,总体呈NNE向展布。金的富集受脆韧性断裂多次叠加或不同方向断裂交汇点的控制,矿化围岩中出现碳酸盐化、铁白云石化、菱铁矿化、大理岩化、高岭土化等热液蚀变。研究认为,区域上的韧脆性剪切带的延长部位应列为找矿区段,在灰岩和砂岩的接触地带(如M6矿化带西侧)应注意找矿,各矿化带内强片理化带的边部和构造的叠加、交汇部位是勘查工作的重点。
B.Phatem primary gold deposit,Laos is located near the Dien Bien Phu-Luang Pracang fault belt and controlled by NE-NNE ductile-brittle shear zone.The altered cataclastic rock type Au ore and auriferous calcite veins occur in Permian limestone.In all there are 6 mineralization zones.Gold concentration is controlled by multi-overprinting of ductile-brittle fractures or intersection（superimposition） of fracture striking in different directions.Carbonation,ankeritization,sideritization,marblization and kaolitization are the wall rock alterations.The ore-searching should be directed to extending parts of the ductile-brittle shear zone and the contact zone of limestone and sandstone（e.g.the west side of the mineralization zone M6） and the ore exploration focused on margins of schistosity zones,superimpositions and intersections of fractures in each mineralization zone.
出处
《地质找矿论丛》
CAS
CSCD
2010年第2期171-176,共6页
Contributions to Geology and Mineral Resources Research
关键词
帕奔金矿
构造破碎蚀变岩型金矿
含金方解石脉型金矿
矿床地质特征
老挝
B.Phatem gold deposit
the altered cataclastic rock type Au ore
auriferous calcite vein
the gold deposit geological characteristics
Laos
