中国煤炭地质
中國煤炭地質
중국매탄지질
COAL GEOLOGY OF CHINA
2014年
12期
74-80
,共7页
地球化学%矿床成因%多金属矿床%热液叠加%矿物包裹体
地毬化學%礦床成因%多金屬礦床%熱液疊加%礦物包裹體
지구화학%광상성인%다금속광상%열액첩가%광물포과체
geochemistry%ore deposit genesis%polymetallic ore deposit%hydrothermal stacking%mineral inclusion
依据青海索拉沟铜多金属矿床地质地球化学特征,特别是矿床物质来源、矿物、元素分带、成矿热液演化中铜多金属矿床的性状,对该矿床的地质特征、矿床成因及控矿条件进行了研究。研究表明,该索拉沟铜多金属矿床属火山沉积—热液改造型矿床,其矿床经历了沉积成岩和热液改造两个阶段。中三叠世海底火山喷发喷气活动携带大量成矿物质,在浅海台地相对低洼的部位(还原条件下)与火山碎屑物、陆源物一起沉积下来,形成了最初的“矿源层”或贫矿层,在随后的(印支期)造山过程中,受强烈构造-岩浆活动的作用,地层中岩石脱水、成矿元素活化、聚集形成富矿溶液,并沿地层层理、岩石破裂运移,交代岩石中化学性活泼的组分或充填于岩石裂隙中富集成矿。
依據青海索拉溝銅多金屬礦床地質地毬化學特徵,特彆是礦床物質來源、礦物、元素分帶、成礦熱液縯化中銅多金屬礦床的性狀,對該礦床的地質特徵、礦床成因及控礦條件進行瞭研究。研究錶明,該索拉溝銅多金屬礦床屬火山沉積—熱液改造型礦床,其礦床經歷瞭沉積成巖和熱液改造兩箇階段。中三疊世海底火山噴髮噴氣活動攜帶大量成礦物質,在淺海檯地相對低窪的部位(還原條件下)與火山碎屑物、陸源物一起沉積下來,形成瞭最初的“礦源層”或貧礦層,在隨後的(印支期)造山過程中,受彊烈構造-巖漿活動的作用,地層中巖石脫水、成礦元素活化、聚集形成富礦溶液,併沿地層層理、巖石破裂運移,交代巖石中化學性活潑的組分或充填于巖石裂隙中富集成礦。
의거청해색랍구동다금속광상지질지구화학특정,특별시광상물질래원、광물、원소분대、성광열액연화중동다금속광상적성상,대해광상적지질특정、광상성인급공광조건진행료연구。연구표명,해색랍구동다금속광상속화산침적—열액개조형광상,기광상경력료침적성암화열액개조량개계단。중삼첩세해저화산분발분기활동휴대대량성광물질,재천해태지상대저와적부위(환원조건하)여화산쇄설물、륙원물일기침적하래,형성료최초적“광원층”혹빈광층,재수후적(인지기)조산과정중,수강렬구조-암장활동적작용,지층중암석탈수、성광원소활화、취집형성부광용액,병연지층층리、암석파렬운이,교대암석중화학성활발적조분혹충전우암석렬극중부집성광。
Based on Solagol copper polymetallic ore deposit geological, geochemical characteristics, especially ore deposit material provenance, minerals, elements zoning, copper polymetallic ore deposit properties and state during ore forming hydrothermal evolution carried out studies on ore deposit geological features, deposit genesis and deposit controlling factors. The study has shown that the ore deposit belongs to volcanic deposit—hydrothermal transformed type has experienced two stages of deposit and transform. Middle Trias?sic submarine volcanic eruption brought along a mass of ore-forming material, then deposited with pyroclasts and terrigenous composi?tions on relatively low part of shallow sea platform (under reducing condition) and formed initial“source bed”or“lean bed”, during the following Indo-Chinese epoch orogenic process, impacted by strong structural and magmatic activities, rock dehydration, metallogenic element activated, brought together and formed pay solution, then migrated along strata bedding, rock fractures and replaced chemical?ly active components in rocks or filled in fractures enriched into ore deposit.