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Geological features and metallogenic model of hydrothermal superimposion (regeneration) gold deposits from Xiaguan to Erlangping in Henan(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2005年第01期
Page:
39-43，64
Research Field:
Publishing date:

Info

Title:
Geological features and metallogenic model of hydrothermal superimposion (regeneration) gold deposits from Xiaguan to Erlangping in Henan
Author(s):
WEI He-ming; ZHAO Guo-bin; JIAO Jian-gang
School of Earth Sciences and Resource Management, Chang’ an University, Xi’ an 710054, China
Keywords:
gold mineral deposit;  hydrothermal;  superimposion;  erlangping group;  telescoped deposit;  mineral deposit mod- el;  Henan
PACS:
P618.51
DOI:
-
Abstract:
From Xiaguan to Erlangping in Henan gold deposits(mineralized pits)occur extensively; they vary in mineraliza- tion type and their conditions of occurrence are complex. Gold deposits formed in intrusive bodies and contact zone between intrusive bodies and wall rocks, and in Mesoproterozoic and early Palaeozoic strata. The authors divide gold deposits in con- tact zones and strata into five types on the basis of ore source, metallogenic fluid origin and mineralization mechanism. The gold deposits are formed because of magma hydrothermalism, metamorphic hydrothermalism and hydrothermal superimpo- sion on the background of volcanism, volcanic sedimentation and normal sedimentation. Each type of gold deposits is experi- enced multiphase and polystage mineralization, but mainly late hydrothermal replacement and packing mineralization. Tec- tonics controls the formation of gold deposits distinctly. The regional deep fault belt controls gold deposits belt. Second-or- der ductile-brittle shear belt controls the distribution of gold deposits; three-order tectonics of interlayer fractured zones, fracture crack zones and contact zones control the ore forming. In all, the main mineralization was hydrothermal superimpo- sion or regeneration.

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Last Update: 1900-01-01