Simulation of rock mass balance of two typical altered rocks in Wulong gold deposit of Liaoning, China

Abstract

Wulong gold deposit hosted in granite and fine-grained diorite dikes, is a typical gold deposit of quartz vein type. Granite and fine-grained diorite dikes in the ore deposit were altered by metallogenic fluid. Based on the altered zoning, the samples of petrochemistry were collected and major and trace elements were analyzed systematically. Calculation of rock mass balance shows that the major elements (SiO₂, K₂O, P₂O₅, Fe₂O₃) in the two typical altered rocks are clearly added into the altered system, and that trace elements (V, Y, Zr, Ni, Co, Sr) assume an increasing and decreasing tendencies in the altered granite and altered diorite dike, respectively. The fluid/rock ratios are 30.17–181.00 and 115.44–692.67 respectively for altered granite and altered diorite dike, they have profoundly effects on metallogenesis.

Keywords

altered rock / rock mass balance / Wulong gold deposit

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