扬子西缘康滇地区早古生代沉积物源示踪分析

早古生代时期，扬子陆块西缘是否亲缘于冈瓦纳陆块群是目前华南古大陆重建必须回答的科学问题。本项目拟以扬子西缘康滇地区重点剖面中的早古生代碎屑岩地层为研究对象，通过古流向、沉积相和沉积环境、沉积岩石学、重矿物形态和结构、重矿物年代学等综合研究，逐层恢复早古生代关键碎屑岩地层的物源属性、源区母岩岩石特征、碎屑物质的搬运途径。在此基础上，充分利用前人的成果资料及本项目申请人已有的工作基础，将扬子西缘康滇地区与扬子东南缘、腾冲-保山-思茅等亚洲块体、印度-澳大利亚等冈瓦纳核心块体进行沉积岩石组合、沉积相、碎屑物源属性、古生物化石、岩相古地理方面的对比研究，从而为约束扬子西缘康滇地区与冈瓦纳陆块群的亲缘性提供沉积学新证据。

Whether the western part of the Yangtze Block was affiliated to the Gondwana assembly of continents during the early Paleozoic is one of the key scientific questions to be addressed in the reconstruction of South China. Targeting at the early Paleozoic siliciclastic strata of some key sedimentary sections from the Kangdian region on the western Yangtze margin, this project will utilize paleocurrent analysis, sedimentary facies and sedimentary environment studies, sedimentary petrology, geomorphology and geochronology of heavy minerals, to reveal the clastic provenance nature and transport pathways of these siliciclastic layers in the Kangdian region. Based on the data and results gained from this study, the project will fully incorporate published data and beyond of other Gondwanan regions/continents from previous studies, together with our own pilot work from the Kangdian region, to conduct comparisons between the Kangdian region of western Yangtze and regions such as the southeastern Yangtze, India, Australia, other Asian terranes and etc. The comparison will be conducted in terms of sedimentary packages, sedimentary facies, siliciclastic provenances, fossil records and litho-paleogeographic records. This study will provide new sedimentary evidence to constraint the affinity between the Kangdian region of western Yangtze and the Gondwana assembly of continents.