干旱区生态环境知识资源中心(Arid): 青海祁漫塔格沙丘地区侵入岩地质、地球化学特征及找矿意义

Arid

	青海祁漫塔格沙丘地区侵入岩地质、地球化学特征及找矿意义
其他题名	The Geological and Geochemical Characteristics of the Intrusive Rock and Prospecting Significance in Shaqiu Areas, Qimantage Metallogenic Belt, Qinghai Province
	李玉春 1; 张爱奎 2; 张培青 2; 刘光莲 2
来源期刊	西北地质
ISSN	1009-6248
出版年	2013
卷号	46 期号:3 页码:70-82
中文摘要	青海祁漫塔格沙丘地区由于受沙漠覆盖的影响,增加了找矿难度,近年来新发现了众多矽卡岩型铁多金属矿床和矿点。通过对区内与成矿有关的侵入岩研究,认为与成矿关系密切的代表性侵入岩组合为花岗闪长岩-二长花岗岩,与虎头崖、野马泉和四角羊沟具有相似的岩石组合特征。由早到晚,侵入岩向富SiO_2和K_2O,贫TiO_2、Al_2O_3、Fe_2O_3、FeO、MnO、MgO、CaO、P_2O_5,分异程度增高,A/CNK值增大,omega (Na_2O) /omega (K_2O)值减小,Eu亏损增强的方向演化。岩石总体属I型,构造背景具有接近碰撞阶段的特征。沙丘地区侵入岩岩浆源区具有清晰的地幔物质贡献印记,辉长闪长岩和花岗闪长岩表现的较为明显,具有形成大型矽卡岩型铁多金属矿床的成矿地质条件。随着矿产勘查工作的深入开展,有望实现找矿重大突破。
英文摘要	Restricted by the cover of desert, the prospecting in Shaqiu area of Qimantage metallogenic belt is rather difficult. Recently, a number of iron-polymetallic deposits of skarn type have been explored. Study on intrusive rocks related to mineralization in this area is conducted. Based on the findings, it is concluded that granodiorite-monzonitic granite was the typical intrusive rock assemblage closely connected to mineralizing, with the same petrotectonic assemblage characteristics in Hutouya, Yemaquan and Sijiaoyanggou deposits. From early period to late period, compositions of intrusive rocks gradually enriched in SiO_2 and K_2O, but reduced in TiO_2, Al_2O_3, Fe_2O_3, FeO, MnO, MgO, CaO and P_2O_5. The differentiated degree and Eu-deficit get stronger while the ratio of Na_2O and K_2O is reducing. Belonging to rocks of I-type, these intrusive rocks possess features in terms of tectonic setting similar to those in collision stage. The magma source region in Shaqiu area has some explicit contribution to mantle-derived substances, especially to gabbro diorite and granodiorite, which is favorable mineralization geological condition for large-sized ron-polymetallic deposits of skarn type. With the progression of mining exploration, major prospecting breakthrough will probably be made.
中文关键词	侵入岩 ; 岩石学 ; 岩石化学 ; 地球化学 ; 沙丘地区 ; 祁漫塔格 ; 青海省
英文关键词	intrusive rock petrology petrochemistry geochemistry Shaqiu area Qimantage Qinghai Province
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:4956590
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230280
作者单位	1.青海省第五地质矿产勘查院, 西宁, 青海 810006, 中国; 2.青海省第三地质矿产勘查院, 西宁, 青海 810029, 中国
推荐引用方式 GB/T 7714	李玉春,张爱奎,张培青,等. 青海祁漫塔格沙丘地区侵入岩地质、地球化学特征及找矿意义[J],2013,46(3):70-82.
APA	李玉春,张爱奎,张培青,&刘光莲.(2013).青海祁漫塔格沙丘地区侵入岩地质、地球化学特征及找矿意义.西北地质,46(3),70-82.
MLA	李玉春,et al."青海祁漫塔格沙丘地区侵入岩地质、地球化学特征及找矿意义".西北地质 46.3(2013):70-82.