Abstract:

The Shuiyindong gold deposit is one of the most important gold deposits in Yunnan-Guizhou-Guangxi“golden triangle”area,
southwestern China and it is a typical Carlin-type strata-bound gold deposits. In this study, we analyzed the borehole data of No.0~427
prospecting line by drawing a contour map and a distribution map of mineralization trending degree in ore-bearing strata. The study
uses the Surfer software to draw the simulation diagram of deposits boundary and the mineralization trend. The study is focused on
analyzing the structure geometry and mineralization pattern of ore-bearing strata in the Shuiyindong mining area. Our analysis reveals
that interface contour line reflects the shape of the anticline. Also, the main locations of gold deposits are at the hinge area of the
anticline and the plunging end of the anticline in the Shuiyindong gold deposit. There existed a negative correlation between Sbt
(structurally altered rock body) and the upper part of the Longtan Formation in the mineralization degree; and the mineralization of the
Shuiyindong gold deposit shows obvious inhomogeneity; In addition, the mineralization degree of Sbt has a regular distribution of a
weak-strong-weak pattern along the east-west directionn and the mineralization degree in the Longtan Formation shows a negative
correlation with the SARB. The mineralization degree is enhanced at the plunging end of the anticline in the Longtan Formation,
suggesting that a large-scale industrial ore body may exist in the deep part of the strata.

Key words: gold deposit in Shuiyindong, mineralization degree, Sbt