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Geodynamics metallogenic mechanism in Damoqujia gold deposit of Shandong Province

LIU Xiao-huang~(1,2) SUN Bai-nian~1 WU Jing-yu~1 KANG Hong-jie~1 NI Ke-qing~3 ZHU Duo-lu~1 LI Hong-jie~2 1.School of Resources and Environmental Sciences,Lanzhou University,Lanzhou 730000,China; 2.No.7 Gold Exploration Brigade of Armed Police,Yantai 264004.Shandong,China; 3.Hebei Institute of Regional Geology Survey,Langfang 065000,Hebei,China  
An integrated analysis of the alteration zones of the Damoqujia gold deposit and the geochemical characteristics of main surrounding rocks,namely the Guojialing granodiorite,showed that the alteration zone's parent rocks of the gold deposit and the Guojialing granodiorite were from the same source,and indi- cated that the Guojialing granodiorite's dynamics mechanism was formed by the thickening of the mesozoic crust and the delamination of the lower crust.Meanwhile,the paper discussed that when the Guojialing granodiorite was made,plentiful CO_2+H_O fluid with rich O_2 appeared.which produced metal compound in the mantle oxidize.When it rose to certain position,the fluid made the surrounding rocks to have K- feldspar,chloritization and biotite and then gold deposited.Finally,metallogenic mechanism of the gold deposit's geodynamics was finished.
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