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.2000.Emanation-Sedimentary Metallogenic Series and Models of the Proterozoic Rift in the Kangdian Axis[J].Acta Geologica Sinica(),74(3):466-472
Emanation-Sedimentary Metallogenic Series and Models of the Proterozoic Rift in the Kangdian Axis    Download PDF
QIN Dexian and LIU ChunxueKunming University of Science and Engineering,Kunming 650093,Yunnan
QIN Dexian and LIU ChunxueKunming University of Science and Engineering,Kunming 650093,Yunnan
DOI:
Abstract:
      The Kangdian axis basement can be divided into two tectonic layers. The lower tectonic layer is the crystalline basement which is made up of the Archaean Dibadu Formation and early Proterozoic Dahongshan Group. The former is a kata-metamorphic basic volcano-sedimentary formation of the old geosyncline (old continental nucleus), and the latter is a medium-grade metamorphosed alkali-rich basic volcanic (emanation)-sedimentary formation of the Yuanjiang-Dahongshan marginal rift. They are in disconformable contact. The upper tectonic layer is the folded basement, and made up of the middle-late Proterozoic Kunyang Group. It is the result of Dongchuan-Yuanjiang intercontinental rifting with discordant contract with the underlying and overlying strata. Along with the evolution of Proterozoic from early to late, four types of emanation-sedimentary deposits in the Kangdian axis rift were formed in turn: (1) emanation-sedimentary iron-copper-gold deposits related to basic volcanic rocks in the Yuanmou-Dahongshan
Key words:metallogenic series and model,rift evolution
Emanation-Sedimentary Metallogenic Series and Models of the Proterozoic Rift in the Kangdian Axis    Download Fulltext
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