项目名称: 桂林地区碳酸盐岩层滑断裂构造地球化学系统的特征和动力分异机制
项目编号: No.41263003
项目类型: 地区科学基金项目
立项/批准年度: 2013
项目学科: 天文学、地球科学
项目作者: 钱建平
作者单位: 桂林理工大学
项目金额: 48万元
中文摘要: 运用构造地球化学理论和方法,选择桂林地区相对纯化和完整的碳酸盐岩层滑断裂构造地球化学系统,通过宏观构造地质背景调查、小构造测量、显微构造岩石学研究、主元素和微量元素地球化学分析等手段,阐明层滑断裂构造地球化学系统的几何形态、产状特征和分带结构;厘定层滑断裂构造地球化学系统的功能特性-溶出区、输运通道和沉淀区;总结特征元素的构造地球化学性质,认识不同元素的迁移富集规律,建立元素的活动性序列。通过显微构造分析、碳酸盐岩相容元素、稀土元素、包裹体地球化学、碳氧同位素地质学、碳的物相分析、电子探针技术和构造地球化学模拟实验等综合手段,阐明层滑断裂构造地球化学系统的动力分异机制,揭示碳酸盐岩层滑断裂形成过程中的构造地球化学作用及类型;确定原岩岩性、构造应力和流体性质等因素对构造地球化学分异作用的影响;在上述研究的基础上,建立基于区域地质构造背景下的碳酸盐岩层滑断裂构造地球化学系统形成和演化模型。
中文关键词: 碳酸盐岩;层滑断裂;动力分异;构造地球化学;桂林
英文摘要: Basted on the theory and method of the tectonic geochemistry,the geometry, occurrence and zoning structures of a relatively pure and complete tectonic geochemical system of the layer-slid fault in the carbonate rocks in Guilin area will be explained clearly through these means such as the investigation of tectonic background, measurement of small structure, microstructural petrology and fabric study and analysis of main and trace elements and so on.The functional characteristics of the tectonic geochemical system of the layer-slid fault will be identified, which contains dissloution subsystem, transport and sediment subsystem. The tectonic geochemical nature of the characteristic elements will be summarized, the regularities of migration and enrichment of the different elements will be understood and the activity sequence of the different elements will be set up.Base on these combined methods such as microscopic structure-composition analysis, compatible elements,rare-earth elements analysis, geochemistry of fluid inclusions, isotope geology of carbon and oxygen, phase analysis of carbon, electron microprobe in tectonite, the simulated experiments of tectonic geochemistry and so on, the mechanisms of dynamic differentiation of tectonic geochemistry in the layer-slid fault in the carbonate rocks will be figured
英文关键词: carbonate rock;layer-slid fault;dynamic differentiation;tectonic geochemistry;Guilin