华南小型“红盆”区域地质调查中的几个关键问题--以鄂东南、赣西北为例  

Several Key Problems about Regional Geological Surveying in the Small "Red Basin" of South China:An Example from Southeast Hubei and Northwest Jiangxi

作　　者：张晓保 张雄华[2] 郄文昆[2] 张扬[2] 

机构地区：[1]湖北省鄂东北地质队,湖北孝感432000 [2]中国地质大学地球科学学院,武汉430074

出　　处：《地质科技情报》2008年第4期15-19,共5页Geological Science and Technology Information

基　　金：江西三都幅1:5万区域地质调查(1992022034);湖北崇阳县幅1:5万区域地质调查(2001014002)

摘　　要：填图单位、微岩相及盆缘断层是华南小型"红盆"区域地质调查中的3个关键问题。沉积环境和微岩相是"红盆"研究及填图单元划分的基础。通过对鄂东南及赣西北等"红盆"的研究总结出23个微岩相。在微岩相、沉积组合及古流向研究的基础上,通过识别冲积扇体及划分冲积扇体内的沉积单元,对原有简单的岩石地层单位进行了细分。此外,通过对盆缘断层的研究,为盆地的形成、演化及后期改造提供了直接的地质证据。The paper discusses 3 key problems about regional geological surveying in the small ＂red basin＂ of South China. mapping units, micro-lithofacies and basin-marginal faults. It states that the analysis of sedimentary environments and micro-lithofacies are foundational for the red basin study and the subdivision of mapping units. Then it summarizes 23 micro-lithofacies through the red basin study in Southeast Hubei and Northwest Jiangxi. The research of micro-lithofacies, sedimentary association and paleocurrent direction has subdivided the originally simple lithostratigraphic units through the identification of alluvial fans and classification of sedimentary units of alluvial fans. This has enriched the contents of images and is of great significance for reconstruct paleoenvironment and evolvement process of the ＂red basin＂. Furthermore, the analysis of basin-marginal faults provides direct geological evidence for the formation, evolvement and late-stage modification of the ＂red basin＂.

关 键 词：华南 “红盆” 填图单位 微岩相 盆缘断层 

分 类 号：P56[天文地球—构造地质学]