Analysis of Seguence Stratigraphy and Depositional Filling in the Gyangze Basin, Tibet
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摘要: 在区域性盆地研究的基础上,通过对沙拉岗锑 (金 )矿区沉积相与层序地层分析,初步识别出Ⅰ类和Ⅱ类不同性质的层序界面,划分出 8个三级层序,包括 2个Ⅰ类层序和 6个Ⅱ类层序,所有层序均具有清晰的三分结构。将江孜盆地斜坡背景的沉积充填演化划分为四个阶段:相对陡的陆源斜坡阶段、相对平缓的陆源斜坡阶段、硅质海底扇阶段、陆源海底扇阶段Abstract: Based on the detaiIed regionaI geoIogicaI setting anaIysis, this paper deaIs with the research of ore-bearing basin, the depositionaI facies and seguence stratigraphic anaIysis have been done for the first time in ShaIagang mining region.And aII kinds of characteristic gravity-fIow sediments, for erampIe, sIide, debris-fIow and turbidity deposits, are significantIy documented . SiIiceous submarine fans made up of different grain sizes and different types of siIiceous rock are aIso discovered for the first time in Gyangze basin. The evoIution stages of depositionaI fiIIing with sIope setting are divided in Gyangze basin
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Key words:
- Gyangze basin /
- seguence stratigraphy /
- depositionaI fiIIing
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