山东国土资源
山東國土資源
산동국토자원
LAND AND RESOURCES IN SHANGDONG PROVINCE
2015年
4期
32-35
,共4页
矿床学%银铜多金属矿%矽卡岩型%叠加改造%丁钦弄%江达县
礦床學%銀銅多金屬礦%矽卡巖型%疊加改造%丁欽弄%江達縣
광상학%은동다금속광%석잡암형%첩가개조%정흠롱%강체현
Ore mineralogy%Ag Cu polymetallic deposits%metasomatism skarn type%superposition re-construction%Dingqinnong area%Jiangda county
西藏丁钦弄银铜多金属矿床是近年来在藏东地区发现的具大型远景的接触交代（矽卡岩）型银铜多金属矿床，该矿床位于羌塘三江成矿区之江达德钦成矿带北段。成矿作用包括陆内裂谷期的矽卡岩化成矿作用及陆内造山期构造—岩浆—热液对先成矿体的叠加改造及独立成矿作用。基于对矽卡岩矿床分带模式结合矿区实际情况的分析辅以地球物理证据，预测Ⅰ2号矿体及Ⅱ号矿体的深部找矿前景较好。两矿体含矿岩石均为锰质矽卡岩，处于侵入体与围岩的外接触带，且视电阻率、视极化率异常均显示深部存在隐伏矿体。
西藏丁欽弄銀銅多金屬礦床是近年來在藏東地區髮現的具大型遠景的接觸交代（矽卡巖）型銀銅多金屬礦床，該礦床位于羌塘三江成礦區之江達德欽成礦帶北段。成礦作用包括陸內裂穀期的矽卡巖化成礦作用及陸內造山期構造—巖漿—熱液對先成礦體的疊加改造及獨立成礦作用。基于對矽卡巖礦床分帶模式結閤礦區實際情況的分析輔以地毬物理證據，預測Ⅰ2號礦體及Ⅱ號礦體的深部找礦前景較好。兩礦體含礦巖石均為錳質矽卡巖，處于侵入體與圍巖的外接觸帶，且視電阻率、視極化率異常均顯示深部存在隱伏礦體。
서장정흠롱은동다금속광상시근년래재장동지구발현적구대형원경적접촉교대（석잡암）형은동다금속광상，해광상위우강당삼강성광구지강체덕흠성광대북단。성광작용포괄륙내렬곡기적석잡암화성광작용급륙내조산기구조—암장—열액대선성광체적첩가개조급독립성광작용。기우대석잡암광상분대모식결합광구실제정황적분석보이지구물리증거，예측Ⅰ2호광체급Ⅱ호광체적심부조광전경교호。량광체함광암석균위맹질석잡암，처우침입체여위암적외접촉대，차시전조솔、시겁화솔이상균현시심부존재은복광체。
Dingqinnong Ag Cu polymetallic deposit is a contact metasomatic skarn type polymetallic de-posit with large scale.It was found in recent years.It located in Jiangda tectonic belt in southern Sanjiang metallogenic belt.Mineralization includes intracontinental rift stage contact metasomatism silicon card lithification mineralization and intracontinental orogenic period tectono magmatic thermal fluid to ante-cedent orebody superposition and transformation and independent metallogenesis.Based on analysis of skarn deposit zone model,combining with actual situation of geophysical evidences,it is predicted Ⅰ 2 ore body and Ⅱ ore body have good prospecting future in deep part.Ore bearing rocks are manganese skarn,and located in external contact zone of the intrusive rocks and surrounding rocks.Apparent resistiv-ity and apparent polarizability anomaly shows there exists hidden ore bodies in deep part.
