地质与资源2017，Vol.26Issue(2)：134-139,6.
青海沙柳河矿区侵入岩地质特征及成矿意义
GEOLOGICAL CHARACTERISTICS AND METALLOGENIC IMPLICATION OF THE INTRUSIVE ROCKS IN SHALIUHE OREFIELD, QINGHAI PROVINCE
张钰 1马国栋 2李碧乐 2马福贵 3贾建团1
作者信息
- 1. 吉林大学地球科学学院,吉林长春130061
- 2. 青海省地质调查局,青海西宁810000
- 3. 青海省第一地质矿产勘查院,青海海东810600
- 折叠
摘要
Abstract
The Shaliuhe tungsten-tin orefield in Qinghai Province,tectonically belonging to the eastern margin of the Caledonian synclinorium fold belt in northern Qaidam Basin,is broadly intruded by Indosinian rocks.With discussion on the composition,lithology and petrochemistry of intrusive rocks,this paper analyzes the relationship between the rocks and the W-Sn metallogenesis.The result shows that the ore-forming rock in the orefield is dominated by biotite monzogranite,belonging to S-type of weak alkaline-peralkaline silica-aluminum supersaturated granite,with various kinds of accessory minerals.The Pb,Zn,W and Sn contents in the rock are 1.5-3.3 times higher than the world average values of granite,suggesting that the intrusive rock in the area is the material source for W-Sn mineralization.The granite is analyzed with the approaches of (K +Na)-Si correlation diagram,SiO2-(CaO +MgO +FeO)-(Na2O +K2O +Al2O3) phase diagram and differentiation index histogram.It is concluded that the porphyraceous biotite monzogranite in the orefield shows great similarity to the W-Sn ore-forming rocks both in China and abroad in lithology,petrochemistry,composition and forming time,to be a favorable metallogenic parent rock.关键词
侵入岩/黑云二长花岗岩/钨锡矿床/成矿母岩/沙柳河矿区/青海省Key words
intrusive rock/biotite monzogranite/W-Sn deposit/ore-forming rock/Shaliuhe orefield/Qinghai Province分类
天文与地球科学引用本文复制引用
张钰,马国栋,李碧乐,马福贵,贾建团..青海沙柳河矿区侵入岩地质特征及成矿意义[J].地质与资源,2017,26(2):134-139,6.
