摘要
查干础鲁金矿矿体赋存在侵位于阿木山组的浅成超浅成次火山岩(次石英粗安岩)中,是受构造控制的蚀变岩型金矿床。通过对次石英粗安岩的岩石学特征、矿物学及地球化学特征进行分析,显示出次石英粗安岩为贫钙型铝过饱和系列,是金矿床的主要赋矿岩石,其次为细粒闪长玢岩。有用组分主要为Au,其次为Ag。金主要以自然金形式存在,主要与次石英粗安岩中的石英脉关系密切,或是存在于假象黄铁矿及褐铁矿中,虽然微粒金产出数量最多,但从面积比上看,则以粗粒金、巨粒金为主,赋存状态以晶隙金为主,包体金及裂隙金较少。自然金粒形态主要为片状、弯曲片状、不规则片状。
Ore bodies of the Chaganchulu gold deposit,a tectonic-altered rock type,occur in hypabyssal-superficial volcano instrusive-rock( sub-volcano quartz trachyandesite) in the Amushan Formation. Analyses of petrology,petrography and geochemistry of the sub-volcano quartz trachyandesite have revealed a calcium-poor type and aluminum- oversaturated series,a major host rock for the gold deposit,and secondly host-rock fine-grained diorite-porphyrite. The useful component is mainly Au,followed by Ag. The main mineral components are of natural gold,pyrite and limonite. The coarse and huge grains occur in gold,which are flake-shaped,or bending,irregular,and the thickness of which is less than 0. 010 mm. The natural gold,an intercrystalline one,is closely related to the quartz vein in the sub-volcano quartz trachyandesite.
出处
《地质与勘探》
CAS
CSCD
北大核心
2015年第2期246-252,共7页
Geology and Exploration
基金
国家自然科学基金项目(编号:41402009)资助
关键词
地质特征
产出特征
查干础鲁金矿
内蒙古
Geological characteristics,occurrence,Chaganchulu gold deposit,Inner Mongolia
