西北地质2012，Vol.45Issue(1)：63-70,8.
青海治多多彩地区火山岩岩石特征
Characteristics of Volcanic Rocks and Analysis on the Prospecting Potentiality in Duocai Region,Zhiduo County, Qinghai Province
摘要
Abstract
Duocai region lies in the east of Late Triassic Xijinwulan-Yidun island arc zone, belonging to the northwest of Sanjiang Metallogenic Belt. Galonggema copper-polymetallic deposit and Ladiouma copper mineralized spot have been discovered for many years in this belt. This paper focused on the characteristics of volcanic rocks which close to the mineralization in the area, restored volcanic apparatus and volcanic e-ruption environment, and discussed the relationship between volcanic activity and mineralization. Studies have shown that the volcanic rocks in this area are mainly dacite and dacitic pyroclastic rocks, followed by andesite, andesitic pyroclastic rocks. Trace elements of volcanic rocks enriched in lithophile elements Rb, Sr, Th and siderophile elements Co, Ni. Chalcophile elements and Zr is similar to the reference value, V and Ba contents are higher than the element abundance of the crust, and Sc, Cr are depleted. ΣREE of in-termediate-acidic volcanic rocks are higher, and general characteristics are similar with volcanic rocks of o-rogenic belt with negative Eu anomalies on the REE patterns. Volcanic phase of the overflow phase. Vol-canic eruption was happen in shallow marine zone with structure environment of volcanic belongs to island-arc environment. Mineralization mainly related to ancient volcanic apparatus and the late dynamic meta-morphism.关键词
青海治多多彩地区/火山岩/岩石特征Key words
Duocai region of Zhiduo county of Qinghai Province/volcanic rocks/geologic characteristics分类
天文与地球科学引用本文复制引用
郑宗学,覃泽礼,吴远安..青海治多多彩地区火山岩岩石特征[J].西北地质,2012,45(1):63-70,8.基金项目
研究项目受中央基金“青海省治多县多彩地区铜多金属矿普查”(编号2009221002) （编号2009221002）
