Study On Characteristics Of Tectonic Evolution And Metallogenic Regularity In Alake Lake-Hongshuichuan Of The East Kunlun Area

The Alake Lake-Hongshuichuan area is located in the southern margin of eastern East-Kunlun which is a compound continental orogenic belt. It had undergone some multiple sedimentation-magatism-tectonism, and has good metallogenetic geological conditions. Studies of regional tectonic evolution characteristics and metallogenic regularities of the Alake Lake-Hongshuichuan area in the East Kunlun, are under the premise of macro mastering the latest research achievements and progress, at the base of the 1:50000 regional geological mineral survey, using the Plate Tectonic theory and metallogenic theory, as well as combining with studies of the latest wild-field work and indoor stratigraphic geology, petrology, isotopic geochronology, geochemistry, mineral geological information. The paper has systematically discussed the relationship between tectonic evolution and mineralization in the East Kunlun region. The anomalous areas are divided after the analysis of regional geological characteristics, geochemical anomalies and geophysical anomalies in the Alake Lake-Hongshuichuan area. Combined with the mineral (mineralized) spots in this area, the author puts the emphasis on the geologic reasons of each anomalous area, and has pointed out the prospecting direction. Based on this, the paper has discussed tectonic evolution and metallogenic regularities of the Alake Lake-Hongshuichuan area.After studies of the research area, the following cognitions are acquired in the paper.1. The relationship between tectonic evolution and mineralization has been revised in the East Kunlun region. East Kunlun is a compound continental orogenic belt with complex evolutionary history. Its tectonic evolution had involved four tectonic circles, which were Precambrian orogenic belt basal formation stage, Caledonian subduction-collision orogenic stage, Hercynian-Indosinian compound orogenic stage, and Yanshanian-Himalayan intracontinental tectonic stage. Caledonian orogenic stage was the main orogenic stage, and Hercynian-Indosinian stage was a compound continental orogenesis which superimposed on the Caledonian orogenic stage. Regional geotectonic evolution plays a decisive role in the formation and spatial and temporal distribution of each kind of deposit. The deposit association types in east Kunlun region mainly are SEDEX and VHMS types related with rift-oceanic basin, and orogenic deposit association related with subduction-collision orogenesis. Caledonian and Hercynian-Indosinian were the main metallogenic periods in the East Kunlun area.2. With the comprehensive analysis from geochemical exploration, geophysical exploration, geology, etc., the paper divides the research area into five anomalous areas. Combined with the main mineral (mineralized) spots in the research area, the paper has discussed the geological minerogenetic conditions of each anomalous area, and analysed the prospecting potential of Alake Lake-Hongshuichuan area.3. The paper has multi-analysed the deposit-controlling conditions of Alake Lake-Hongshuichuan area in terms of regional geochemistry, stratum, magma, tectonics, etc., and discussed the tectonic evolution and metallogenic regularities of the research area, which may provide certain theoretical support for prospecting in the research area in future.