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- W2348676406 abstract "The Langyashan copper deposit in Chuxian, Anhui province, is part of the Lower Reaches of the Yangtze River metallogenic belt, where the largest copper deposit associated with gold was found so far in east Anhui. There are few case studies on geochemical features of the Chuxian magmatic intrusion that closely related to the mineralization. Base on field geological survey, a suit of samples from the Chuxian magmatic intrusion and Shangyapu magmatic intrusion was analyzed. The results show that these Yanshanian intrusive rocks have geochemical characteristics similar to those of adakite, with features of SiO256%, high Al content (Al2O3≥15%), rich in Sr, Ba and Cr, Ni, high in Sr/Y(145~181) and (La/Yb)N≥21 ratios; with low Y(7.5~9.1 μg/g) and Yb (0.68~0.71 μg/g) contents, and no significant Eu anomalies (δEu=0.96~1.04). The high MgO contents (3.15%~3.36%), Mg#(56~66) and Sr/La(56~67), display characteristics of seawater alteration of MORB. The Yanshanian magmatic rocks in this region are the typical adakites which were derived from subducted oceanic crust, During the emplacement of the rocks, the ore-forming materials were enriched and mineralized in the suitable position. The Shangyaopu magmatic intrusion nearby has similar geochemical features, and thus, should have similar genetic and mineralization background like that of the Chuxian intrusion. Moreover, we found a pulse of silicified shattered dolomite belt with micron pyrite on the north-west side of the Chouxian magmatic body occurring as siliceous vein and polymetallic mineralization around the Shangyaopu magmatic body. Comparing the silicified belt and siliceous vein to the Langyashan copper mineralization skarn, we deduced that they are closely related to the Yanshanian intrusive rocks, the Shangyaopu magmatic body and surrounding areas can be prospective area for copper associated with gold deposit. In conclusion, the authors propose that regional ore exploration should not be limited to the present skarn-type copper-gold deposit while the new type of siliceous veins with polymetallic mineralization be ignored." @default.
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- W2348676406 date "2012-01-01" @default.
- W2348676406 modified "2023-09-25" @default.
- W2348676406 title "Study on the Yanshanian Intrusions in Langyashan Area of Chuxian County: Petrogenesis and Regional Ore Prospection" @default.
- W2348676406 hasPublicationYear "2012" @default.
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