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Geochemical Constraints on the Alkaline Igneous Rocks in East Qingling: Significance to Au Mineralization
Author(s) -
DUAN Youqiang,
YANG Xiaoyong,
ZHANG Zhengwei
Publication year - 2014
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12375_18
Subject(s) - geochemistry , chinese academy of sciences , mineralization (soil science) , china , igneous rock , crust , mantle (geology) , geology , archaeology , geography , soil science , soil water
The Qinling–Dabie is a composite orogenic belt underwent two episodes of collision in the Early Silurian in North Qinling (444–427 Ma) and Late Triassic time in South Qinling (242–219 Ma) (Mao et al., 2001). The North Qinling and North China Craton are separated by the Luanchuan fault zone, and discontinuous outcrops of alkaline igneous rocks are along this fault zone. The Qinling alkaline igneous rocks (QAIR) are related to gold deposits, mainly distributing in Lushi Luanchuan, Songxian, Nanzhao, Wuyang and Fangcheng, the types of these alkaline rocks are varied, but formed in a similar background, they are syenite, aegirine syenite, nepheline syenite, monzonite, quartz monzonite and orthophyre.