摘要
黔西南金矿勘查已升级至国家战略层面,弄清其成因机制具有重要意义。综合运用区域重磁资料,对区内深部基底物质进行研究,通过对浅、深部隐伏岩体圈定及地质-重力模型异常拟合计算,结合区域地质、矿产及化探资料,提出金矿成矿物源,主要有两种供给方式,一种为前人的由表层沉积岩提供矿源层,一种为本研究提出的由深部以中生代花岗岩或变质基底(含基性-超基性岩浆岩类参与)提供矿源层。厘定了12处浅部隐伏岩体异常区,分离出4大深部岩浆岩块体。研究成果基本反映了区内的客观地质现象和地质作用结果,为研究区金矿勘探提供相关依据。
The exploration of gold deposits in southwestern Guizhou has been upgraded to the national strategic level,and it is important to clarify the gold-deposit formation mechanism. The deep substrate material has been studied using regional gravity and magnetic data in this paper. Through the delineation of the shallow and deep concealed-rock masses and the fitting calculation of the geology-gravity model anomalies,this paper has analyzed the gold mineral source combined with regional geological,geochemical and mineral data of the study area. The gold mineral source has two main supply models. One is the surface layer of sedimentary rocks providing ore-source layer previously proposed,and the other is the deep Mesozoic granite or metamorphic basement（ containing basic-ultrabasic magmatite） providing ore-source layer firstly proposed in this paper. This study has determined 12 anomaly areas of the shallow concealed-rock masses,and has separated 4 large deep-magmatite blocks. The result basically reflects the general geology situation of the study area,and can provide relevant basis for gold exploration in southwestern Guizhou.
出处
《现代地质》
CAS
CSCD
北大核心
2015年第3期702-712,共11页
Geoscience
基金
中国地质调查局基金项目"贵州省矿产地质与区域成矿规律综合研究"([2014]03-003-017))
贵州省地质矿产勘查开发局重大地质科学研究项目"水城-紫云-南丹晚古生代裂陷作用及其与主要矿产的关系"(黔地矿科[2009]15号)
关键词
花岗岩基底
煌斑岩
密度
地质-地球物理模式
金矿物源
黔西南
granite basement
lamprophyre
density
geological-geophysical model
material source of gold deposit
southwestern Guizhou
