地质找矿论丛2018，Vol.33Issue(1)：93-99,7.DOI:10.6053/j.issn.1001-1412.2018.01.012
北天山西段喇嘛苏铜矿中酸性岩体岩石化学特征及其地质意义
Petrochemical Characteristics and Its Geological Significance of the Acid-intermediate Intrusive Bodies in Lamasu Copper Deposit in the western section of north Tianshan Mountain
摘要
Abstract
Peacock index,Rittmann index and Wright index of the acid-intermediate intrusive bodies in Lamasu copper deposit all indicate that the acid-intermediate intrusive bodies in this area belong to calc-alkalic rock series.The average of differentiation index is 77.57 showing their relatively complete differenti-ation evolution;the average of solidification index is 12.01 showing relatively high magmatic differentiation;the average of felsic index is 69.96 and mafic index 61.98 showing the medium degree of fractional crystallization.On MF vs FL differentiation trend chart,distribution of sample point basically is continuous illustrating their continuous evolution.Most sample points on Na2O vs K2O relational diagram fall into the area of I-type granite reflecting that the intrusive bodies are I-type granite.The average content of TiO2 of the intrusive bodies are 0.28％ far below those of the same kind of rocks in other areas of China and other places of the World.On the relational chart of lgτ-lgσ,almost all of the sample points fall into the area of volcanic rock of subduction zone.All this indicates that the intrusive bodies should be formed in subduction zone and they related with subduction process.On the relational chart of R1 vs R2,most of the sample points fall into the area of crustal molten granite and syn-collisional granite,and a few sample pointsl into other areas illustrating assimilation and blending with country rock during the evolution of magama.关键词
喇嘛苏铜矿/中酸性岩体/结晶环境/分异演化/消减带/北天山西段/新疆Key words
Lamasu Cu deposit/acid-intermediate intrusive bodies/crystallographic environment/differentiation and evolution/subduction zone/the western section of north Tianshan Mountain/Xinjiang分类
天文与地球科学引用本文复制引用
毛政利,成功,赖健清,彭省临..北天山西段喇嘛苏铜矿中酸性岩体岩石化学特征及其地质意义[J].地质找矿论丛,2018,33(1):93-99,7.基金项目
国家自然科学基金项目(编号:41171342)资助. （编号:41171342）
