中国庐山晚第四纪沉积岩系的石英形貌显微结构及环境过程  

Microstructure and Morphology of Quartz from Late Quaternary Sedimentary Rocks in Lushan Mts.China,and Its Environment Process

作　　者：胡东生[1,2,3] 李小豫[2] 熊卫强[4] 张华京[1] 弓虎军[3] 胡文瑄[5] 张国伟[3] 

机构地区：[1]湖南师范大学资源环境科学学院,长沙410081 [2]中国煤炭地质总局青海煤炭地质勘察院,西宁810001 [3]西北大学大陆动力学国家重点实验室,西安710069 [4]江西省庐山国土资源局,庐山332900 [5]南京大学地球科学学院,南京210093

出　　处：《地质学报》2012年第6期1020-1030,共11页Acta Geologica Sinica

基　　金：中国科学院地球环境研究所黄土与第四纪地质国家重点实验室开放基金项目(编号SKLLQG0701);湖南省重点学科建设项目(编号ZRDL0701);西北大学大陆动力学国家重点实验室开放基金项目(编号DL2006001)等共同资助的成果

摘　　要：基于庐山山地晚第四纪地层典型断面的系统调查,从地层剖面层序中筛选的微粒(θ=1～3mm)石英颗粒进行环境电子显微镜观测研究,辨认出显微结构-颗粒形态-变形构造-动力化学作用等特征,运用系统过程发展中的节点事件进行层型剖面的环境响应分析,采取综合指标表征地球表层过程及环境响应情景,明确划分出四个古气候环境发展阶段,由下往上分别表现为冰期环境-间冰期环境-冰缘环境-冰后期环境,为深入研究及科学认识庐山第四纪环境演化过程及全球变化提供了新的基础依据。During systematic investigation on the typical profiles of the Late Quaternary in the Lushan region,the authors collected quartz samples from the profiles.The samples were sieved into particles with quartz particle size of θ= 1~3mm.Observation under electronic microscope reveals quartz microstructures such as morphology,deformation,and dynamic chemical effect.Key events taking place in the process were analyzed to understand environmental response of strata profiles.Through comprehensive index which reflects earth surface process and environmental response,four paleo-climate environmental stages were determined from bottom to top：glacier environment,inter glacier environment,ice margin environment to post glacier environment.The research results provide new evidence for further study and understanding of evolution and global change of the Quaternary environment in the Lushan region.

关 键 词：石英显微形貌结构 颗粒形态-变形构造-动力化学作用 环境响应及节点事件 庐山冰期作用及过程 

分 类 号：P588.2[天文地球—岩石学]