- 责任者：Li Yuchun (No.5 Exploration Institute of Geology and Mineral Resources ; Xining 810006 ; China) ; Zhang Aikui
- 刊名：Northwestern Geology
- 出版年：2013
- 卷期：46(3)
- 关键词：花岗闪长岩 ; granodiorites ; 二长花岗岩 ; monzogranite ; 青海 ; Qinghai Province
- 页码：p.70-82
- 图表：16 illus., 3 tables, 21 refs.
- 分类号：0801
- issnNo：ISSN1009-6248
- isbnNo：CN61-1149/P
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Restricted by the cover of desert, metallogenic belt is rather difficult. Recently, the prospecting in Shaqiu area of Qimantage 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 SiO2 and K2 O, but reduced in TiO2, A1203, Fe203, FeO, MnO, MgO, CaO and P20~. The differentiated degree and Eu- deficit get stronger while the ratio of Na20 and K20 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.