中亚萨亚克矿田成矿岩体矿物学和地球化学:岩浆性质与成矿意义

CORC > 北京大学 > 地球与空间科学学院

	中亚萨亚克矿田成矿岩体矿物学和地球化学:岩浆性质与成矿意义; Mineralogy and geochemistry of intrusions related to Sayak large copper deposit, Kazakhstan, Central Asian metallogenic belt: Magma nature and its significance to mineralization
	安芳 ; 王居里 ; 朱永峰 ; 王建其 ; 魏少妮 ; 赖绍聪
刊名	岩石学报
	2015
关键词	石英闪长玢岩矿物学和地球化学岩浆性质铜成矿作用哈萨克斯坦萨亚克 Quartz diorite porphyry Mineralogy and geochemistry Magma nature Cu mineralization Sayak, Kazakhstan
英文摘要	萨亚克大型铜矿田位于哈萨克斯坦北巴尔喀什斑岩成矿带中部,以矽卡岩型矿床为主。通过对矿区石英闪长岩的矿物化学和地球化学研究,发现石英闪长岩呈斑状结构,斑晶为斜长石和角闪石,其中的斜长石斑晶主要为中长石,角闪石斑晶为镁质普通角闪石;岩石属于高钾钙碱性系列,富集Rb、Sr、Ba等大离子亲石元素和轻稀土元素,亏损Nb、Ta和重稀土元素,高Sr/Y、La/Yb比值,与埃达克岩相似。地球化学特征指示萨亚克矿区侵入岩形成于岛弧环境,为矽卡岩-斑岩型成矿提供了有利的构造背景,岩石可能是岛弧玄武质岩浆在高压下经结晶分异而成。根据角闪石温压计及其成分与氧逸度和岩浆中水含量之间的关系,确定萨亚克石英闪长玢岩中角闪石...; Sayak large copper field is located in the central part of north Balkhash porphyry copper metallogenic belt. It consists mainly of skarn copper deposits and associated porphyry and quartz-vein type copper deposits. Copper mineralization is genetically related to Carboniferous diorite, quartz diorite and granodiorite. Study on mineralogy and geochemistry reveals that the plagioclase and hornblende phenocrysts are andesine and Mg-hornblende. The quartz diorite porphyry samples belong to high-K calc-alkaline, enriched in LILE (such as Rb, Sr and Ba) and LREE, depleted in Na, Ta and HREE. They have high Sr/Y and La/Yb ratios, which is similar to the adakite. The geochemical characteristics of the quartz diorite indicate that they are subduction-related arc magma, formed by differentiation of primary basaltic arc magma. Based on the composition of hornblende, the temperature (799 similar to 843 degrees C), pressure (3.6 similar to 9. 6km), oxygen fugacity (logf(o2) = -11.5 similar to -12.0, Delta FMQ =2.0 similar to 2. 8) and water content in magma (average 1. 2%) were calculated. The tectonic setting, high oxygen fugacity and water content of the magma are favorable for the subsequent formation of magmatic-hydrothermal (porphyry and skarn) copper deposit.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000350616100020&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 3; anfang_china@163.com; 02; 555-570; 31
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/206392]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	安芳,王居里,朱永峰,等. 中亚萨亚克矿田成矿岩体矿物学和地球化学:岩浆性质与成矿意义, Mineralogy and geochemistry of intrusions related to Sayak large copper deposit, Kazakhstan, Central Asian metallogenic belt: Magma nature and its significance to mineralization[J]. 岩石学报,2015.
APA	安芳,王居里,朱永峰,王建其,魏少妮,&赖绍聪.(2015).中亚萨亚克矿田成矿岩体矿物学和地球化学:岩浆性质与成矿意义.岩石学报.
MLA	安芳,et al."中亚萨亚克矿田成矿岩体矿物学和地球化学:岩浆性质与成矿意义".岩石学报 (2015).