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Alkalic-type epithermal gold mineralization associated with Tongshi complex in pinyi County, Shandong Province

Chinese Science Bulletin 1999年第S2期44卷 236-238页

作者： XIONG Xiaolin, ZHAO Zhenhua and WANG Qiang Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

THE alkali-rich subvolcanic complex of Tongshi and the associated gold mineralization are located at thesouth boundary of pinyi Mesozoic volcanic depression in western Shandong Province. There are morethan 30 gold deposits and mineralization locations around the complex, in which Guilaizhuang gold deposit and Zhuojiazhuang bonanza gold deposit with important economic value are included. This area isbecoming a perspective target of superlarge gold deposit. In the mine area, there crop out Archeangranitic gneisses, Paleozoic carbonates and Jurassic clastic rocks, which was intruded by Tongshi complexwith 30 km. The complex consists of K-high igneous rocks formed by two stages of magmatism. In thefirst stage, the monzonitic dioritic porphyrys, which belong to K-high calc-alkalic rocks, were formed andin the second stage, monzonitic-syenitic porphyrys, which belong to K-high alkalic rocks, were *** Ar-Ar ages are 189 Ma and 188 Ma, respectively. At the end of the second stage, a lot of theexplosive breccias were formed. The gold mineralization in this area is closely associated in time andspace with the second stage monzonitic-syenitic porphyrys. Based on the characteristics of

关键词： epithermal gold mineralization Tongshi complex pinyi County Shandong Province.

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