摘要
白山钼矿是首次在东天山康古尔韧性剪切带东段南侧的康古尔-土屋-赤湖-黄山成矿带内发现的具有一定规模的斑岩(石英网脉)型钼矿床。该矿床产于下石炭统干墩组(C1g)的黑云母长英质角岩带与花岗斑岩脉内,赋矿岩石主要由含有钾长石-石英细脉、硫化物细脉和长英质角岩组成。钼矿体形态以似层状为主,长100～2000m,平均厚度2.31～43.9m,钼品位变化范围0.030%～0.106%,矿区平均品位0.06%,矿体向深部延深较稳定,厚度大。从内向外可划分出钾长石-石英网脉带、黑云母-石英-钾长石化带、石英-绢云母化带、青盘岩化带4个蚀变带,其中钾长石-石英细网脉极为发育地段形成钼矿体。同时,从地貌、遥感、地球化学、构造、岩石、蚀变6个方面与典型斑岩钼矿床进行了对比,总结了白山钼矿的找矿标志。
The Baishan Mo deposit is the first porphyry (quartz stockwork) Mo deposit of fairly large magnitude found in the Kanggur-Tuwu-Chihu-Huangshan metallogenic belt on the southern side of the eastern segment of the Kanggur ductile shear zone in the East Tianshan Mountains. It occurs in the biotite felsic hornstone zone of the Lower Carboniferous Gandun Formation and granite porphyry vein. The host rocks consist predominantly of K-feldspar-quartz veinlets, sulfide veinlets and felsic hornstone. The Mo orebodies are mainly stratified in shape, 100-2000 m long with an average thickness of 2.31-43.9 m. The Mo grade ranges from 0.030%-0.106%, with a mean grade of 0.06% in the ore district. The orebodies thickness is big and have a relatively persistent downward extension. From the center outward, four alteration zones, the K-feldspar-quartz stockwork zone, biotite-quartz-K-feldspar alteration zone, quartz-sericite alteration and propylitic alteration zone, may be distinguished. Mo orebodies formed in sites where K-feldspar-quartz stockworks are very well developed. Furthermore, this deposit is correlated with some typical porphyry Mo deposits in respect to the geomorphology, remote sensing features, geochemistry, structure, rocks and alteration and some criteria for Mo prospecting in the Baishan Mo deposit are summarized.
出处
《地质通报》
CAS
CSCD
北大核心
2004年第11期1132-1138,共7页
Geological Bulletin of China
基金
中国地质调查局<新疆哈密地区铜多金属矿调查评价>项目(编号:20011020001)
中央专项基金项目<新疆哈密市白山钼矿普查>(编号:200122002004)联合资助的部分成果。
关键词
东天山
新疆哈密
白山钼矿
长英质角岩
斑岩-石英网脉型钼矿
蚀变分带
找矿标志
East Tianshan
Hami, Xinjiang
Baishan Mo deposit
felsic hornstone
porphyry-quartz stockwork Mo deposit
alteration zoning
prospecting criteria
