摘要
球状风化发育类型广泛,并且与人们的生产生活息息相关,但是人们对球状风化的研究却相对较少。为进一步研究其发育特征和形成机制,笔者通过薄片鉴定、扫描电镜、X--射线衍射、主量及微量元素分析等实验手段对米仓山构造带下寒武统筇竹寺组砂岩球状风化发育特征及成因机制开展了系统研究。研究表明,米仓山构造带下寒武统筇竹寺组砂岩的球状风化除了受构造运动、气候和降雨等因素的影响外,其核心因素是地层岩性、化学风化作用和不同部位的差异风化。风化的形成过程大致可以分为节理的形成以及岩层的分割、核部球体的形成及边部风化壳的剥落3个阶段。
Spherical weathering has a wide range of development types and is closely related to people s production and life,but research on spherical weathering is relatively few.In order to further study its characteristics and formation mechanism,the authors conducted a systematic study on the characteristics and formation mechanism of sandstone spherical weathering in the Lower Cambrian Qiongzhusi Formation within the Micangshan structural zone by means of thin section identification,scanning electron microscope,X-ray diffraction,as well as major and trace element analysis.The research shows that the spherical weathering of sandstone in the Lower Cambrian Qiongzhusi Formation from the Micangshan structural zone is influenced by tectonic movement,climate,rainfall and other factors,and the core factors are the stratum lithology,chemical weathering and different weathering of different parts.The formation processes of weathering can be divided into three stages:the formation of the fractures and the division of rock strata,the formation of the nuclear sphere and the peeling of the edge weathered shell.
作者
师文文
杨兆林
尹洪荣
牛基宏
杜贵超
陈娟
陈奕阳
崔耀科
SHI Wenwen;YANG Zhaolin;YIN Hongrong;NIU Jihong;DU Guichao;CHEN Juan;CHEN Yiyang;CUI Yaoke(College of Earth Sciences and Engineering,Xi an Shiyou University,Xi an 710065,China;Key Laboratory of Oil and Gas Reservoir Geology in Shaanxi Province,Xi an 710065,China;Exploration and Development Research Institute of Petro China Changqing Oilfield Company,Xi an 710065,China)
出处
《世界地质》
CAS
2022年第1期173-185,共13页
World Geology
基金
国家重大科技专项(2017ZX05039-001)
陕西省教育厅重点实验室科研计划项目(18JS092)联合资助。
关键词
砂岩球状风化
成因机制
下寒武统
米仓山构造带
筇竹寺组
sandstone spherical weathering
formation mechanism
Lower Cambrian
Micangshan structural zone
Qiongzhusi Formation
