黄金
黃金
황금
GOLD JOURNAL
2013年
5期
17-22
,共6页
宋贵斌%刘洪利%马靖%王龙%葛永森%戴曙光%梁中恺
宋貴斌%劉洪利%馬靖%王龍%葛永森%戴曙光%樑中愷
송귀빈%류홍리%마정%왕룡%갈영삼%대서광%량중개
火山岩%地质背景%成矿机制%十五里桥金矿床
火山巖%地質揹景%成礦機製%十五裏橋金礦床
화산암%지질배경%성광궤제%십오리교금광상
volcanic rock%geological settings%metallogenic mechanism%Shiwuliqiao gold deposit
十五里桥金矿床处于上黑龙江盆地南缘,是近年来新发现的具有较大找矿潜力的岩金矿床,矿体赋存于伊利克得组次火山岩与上库力组火山岩内.岩石地球化学特征表明:伊利克得组次火山岩为钙碱性向碱性岩石过渡系列,总体为安山岩类;而上库力组火山岩为高钾钙碱性岩石类型,总体与流纹岩相当.区内火山岩是造山带分异出来的钙碱性岩浆,具有活动陆缘环境的特征,是早白垩世伸展环境下火山-岩浆活动的产物,形成深度为230 km左右,而十五里桥金矿床是火山活动后期拉张环境下构造、热液活动的产物,成矿物质主要来源于火山岩地层.
十五裏橋金礦床處于上黑龍江盆地南緣,是近年來新髮現的具有較大找礦潛力的巖金礦床,礦體賦存于伊利剋得組次火山巖與上庫力組火山巖內.巖石地毬化學特徵錶明:伊利剋得組次火山巖為鈣堿性嚮堿性巖石過渡繫列,總體為安山巖類;而上庫力組火山巖為高鉀鈣堿性巖石類型,總體與流紋巖相噹.區內火山巖是造山帶分異齣來的鈣堿性巖漿,具有活動陸緣環境的特徵,是早白堊世伸展環境下火山-巖漿活動的產物,形成深度為230 km左右,而十五裏橋金礦床是火山活動後期拉張環境下構造、熱液活動的產物,成礦物質主要來源于火山巖地層.
십오리교금광상처우상흑룡강분지남연,시근년래신발현적구유교대조광잠력적암금광상,광체부존우이리극득조차화산암여상고력조화산암내.암석지구화학특정표명:이리극득조차화산암위개감성향감성암석과도계렬,총체위안산암류;이상고력조화산암위고갑개감성암석류형,총체여류문암상당.구내화산암시조산대분이출래적개감성암장,구유활동륙연배경적특정,시조백성세신전배경하화산-암장활동적산물,형성심도위230 km좌우,이십오리교금광상시화산활동후기랍장배경하구조、열액활동적산물,성광물질주요래원우화산암지층.
@@@@The Shiwuliqiao gold deposit is located in the south margin of upper Heilongjiang Basin ,which was a newly discovered rock gold deposit and has great prospecting potential .The orebodies occurred in the Yilikede Group subvolcanics and Shangkuli Group volcanic geochemical characteristics indicate that the Yilikede Group subvolcanics are transition series from calc-alkaline to alkaline rocks and generally belong to andesite .The Shangkuli Group are high-K calc-alkaline series with similar lithology to rhyolite .The volcanics in the area were formed by calc-alkaline magmas deriving from differentiation of orogenic belt ,possessing the characteristic of active continental margin ,which is resulted from the volcano-magmatic activity in the Early Cretaceous extensional environment with metallogenic depth about 230 km.Shiwuliqiao gold deposit is formed in the tectonic and hydrothermal activities .Metallogenic materials are mainly from volcanic rock strata.