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《Geology of Shaanxi》 1991-01
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THE CHARACTERISTICS OF THE FRACTURE TECTONIC CONTROLLING VEINS (ORES) AND THE RELATIONSHIP BETWEEN THE TECTONIC EVOLUTION AND OREFORMING IN THE GOLD-WOLFRAM DEPOSIT IN THE YANGXIE-FENGBEIHE AREA IN SHAANXI

Luo Xu (The Geological Team No.13 of the Shaanxi Bureau of Geology and Mineral Resources)  
The gold-wolfram deposit in the Yangxie-Fengbeihe area is strictly controlled by fracture tectonics.The fractures controlling the veins(ores) are characterized by tenso-shear,shear and compresso-shear properties, which changed many times from stabilization to movement.They are con- nected with the regional fractures and deep-seated fractures in NE and NWW trends,thus forming the tectonic network controlling the ores in the area.In the Indosinian ore-forming period,the transformation and super- position of the regional multiple stress fields,magmatic movement and fre- quent alternation of the torsional force couple directions resulted in the transformation of the mechanic properties of fractures with different gra- de,which was the decisive factor for the ore fluid formation,movement and ore deposition.
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