Metallogenic Conditions Of Copper Mine And Resource Potentiality Evaluation In Two Rivers Region Of North-central,Heilongjiang Province

Duobaoshan ore concentrated area lies in the north central part of Heilongjiangprovince,where has found various types of deposits13points and multiple mining,mineral,which is one of porphyre and skarn copper ore deposit in northeast. Stratum ofore concentrated area is exposed from the Lower Proterozoic to Quaternary System, northernvalleys are mainly Mesozoic Erathem Stratum, Paleozoic Stratum are sporadicdistribution,where tectonic position includes Handaqi eugeosyncline fold belt in Daxinganlinggeosyncline fold system and Longjiang moletrack in Xiaoxinganling Nenjiang massif..Intrusive rocks are mainly the middle,late Hercynian and early Yanshanian Intrusive rocks.Batholith，stock form of the middle, late Hercynian Intrusive rocks distribute in south–central evaluation area。stock form of the early Yanshanian intrusive rocks distribute in thenortheast and west。Variscan and Yanshanian small intrusive bodies are close to mineralizationof porphyry copper–molybdenum gold deposit and gold deposit is of a hydrothermal fluidfilling quartz vein–type.At the margin or its joint band of rise and depression,riftgrow,which is favourable setting for mineralization. Basic ore–control factor of the study onminerogenic series is variscan structure control functions of mineralization and Yanshanianstructure control functions of mineralization. Middle Ordovician Duobao Shan Group issource beds of copper deposit.But andesite in Duobao Shan Group and its neutral tuff issource beds of copper deposit.which provides sufficient material sources for creating largecopper deposit.This paper special research Duobao Shan type porphyry Cu deposit and San Kuanggoutype contact metasomatism copper depositDuobao Shan type porphyry Cu deposit reflects that andesite in early middle Ordoviciancopper volcanio sedimentary formation is source beds under early middle Ordovicianvolcanic island arcs tectonic settings,middle Ordovician granodiorite andgranodiorite porphyry squeezes crush foliation tectoniczone passive emplacement along thevertical NW arc of Duobao Shan volcanic arc,which the action of multi hydrothemalporphyry deposit gathers two large copper deposit.San Kuanggou type contact metasomatism copper deposit reflects that a part of granodiorite which contains copper and iron intrude into Duobao Shan group stratum alongNW structure (fault,fracture)predommainantly in early Yanshanian,which contactmetasomatism with its marble lense deeply and hottest to form ontact metasomatism copperdeposit that andradite skarn is wall rock.This paper focuses on Xigou in Aihui district of Heihe city and Shangshijiawopeng inLongjiang county choice of evaluation area. and makes the copper the key minerals, adoptslarge scale geological, geophysical exploration, geochemical exploration measure and the dataof the surface exposing and deep proving and evaluates resource potential for regional ore–searching.Circle14ore bodies(Mineralized bodies),in which4buried ore bodies(Mineralizedbodies), are mainly molybdenum mineralization （Mo≥0.015×10~2）, silver mineralization（Ag≥20×10~6）,secondly copper mineralization Cu≥0.1×10~2）. ore bodies(Mineralized bodies)are in the side of Tamulangou group andesite and intrusive rock of Late Hercynian granite andearly Yanshanian Wenxiang granite granite porphyry contact zone.This paper makes a summary of regional metallogenetic features and regular,andevaluate resource potential for regional ore–searching.