地质调查与研究
地質調查與研究
지질조사여연구
GEOLOGICAL SURVEY AND RESEARCH
2011年
3期
203-209
,共7页
帕奔金矿%地质特征%矿床特征%找矿标志%老挝
帕奔金礦%地質特徵%礦床特徵%找礦標誌%老撾
파분금광%지질특정%광상특정%조광표지%로과
Phabon gold deposit%geological characteristic orebody characteristic%prospecting criteria%Laos
老挝帕奔金矿处于云南三江成矿带南延部分,区域上是重要的铁、铜、金矿集中区。目前矿区共发现五条金矿体,其赋矿围岩为下二叠统海相碳酸盐岩,均产于北北东向的韧性剪切带裂隙和北北西向次级构造裂隙中。矿区以发育碳酸盐化为特征,按碳酸盐的产出特征可将金矿体分为蚀变岩型（碳酸盐呈微细脉或复脉）、构造破碎带型（碳酸盐呈胶结物）和含金方解石脉型（碳酸盐单脉含矿）3类。金主要呈包裹金或裂隙金分布于方解石、黄铁矿等矿物及其显微裂隙中。经初步研究,笔者认为该矿床为构造中低温热液型金矿,并从地层、构造和蚀变角度提出了找矿标志,以期对三江成矿带找矿有一定的启示作用。
老撾帕奔金礦處于雲南三江成礦帶南延部分,區域上是重要的鐵、銅、金礦集中區。目前礦區共髮現五條金礦體,其賦礦圍巖為下二疊統海相碳痠鹽巖,均產于北北東嚮的韌性剪切帶裂隙和北北西嚮次級構造裂隙中。礦區以髮育碳痠鹽化為特徵,按碳痠鹽的產齣特徵可將金礦體分為蝕變巖型（碳痠鹽呈微細脈或複脈）、構造破碎帶型（碳痠鹽呈膠結物）和含金方解石脈型（碳痠鹽單脈含礦）3類。金主要呈包裹金或裂隙金分佈于方解石、黃鐵礦等礦物及其顯微裂隙中。經初步研究,筆者認為該礦床為構造中低溫熱液型金礦,併從地層、構造和蝕變角度提齣瞭找礦標誌,以期對三江成礦帶找礦有一定的啟示作用。
로과파분금광처우운남삼강성광대남연부분,구역상시중요적철、동、금광집중구。목전광구공발현오조금광체,기부광위암위하이첩통해상탄산염암,균산우북북동향적인성전절대렬극화북북서향차급구조렬극중。광구이발육탄산염화위특정,안탄산염적산출특정가장금광체분위식변암형（탄산염정미세맥혹복맥）、구조파쇄대형（탄산염정효결물）화함금방해석맥형（탄산염단맥함광）3류。금주요정포과금혹렬극금분포우방해석、황철광등광물급기현미렬극중。경초보연구,필자인위해광상위구조중저온열액형금광,병종지층、구조화식변각도제출료조광표지,이기대삼강성광대조광유일정적계시작용。
Phabon gold deposit in Laos is located in the extension part of the southern Sanjiang metallogenic belt in Yunnan Province,which is an important concetrated area of iron,copper and gold deposits.Five gold orebodies have been found in this area,and the host rocks are mainly composed of Permian marine carbonate rocks.The ore-control structures include fractures of NNE ductile shear zone and NNW secondary structure.Carbonatization is the main alteration and it can be classified into three types according to their occurrences： alteration-type,structural fracture zone-type and gold-bearing carbonate vein-type.Inclusion gold and fissure gold occurr in the calcites and pyrites and their fissures.Based on the investigation in the field,it is concluded that this deposit belongs to structural meso-epithermal hydrothermal type gold deposit,and some prospecting indicators from strata,structures and alteration aspects are proposed,which have an reference significance for Au prospecting in Sanjiang metallogenic belt in China.
