武汉阳逻砾石层砾石统计分析研究  

Study on the Statistical Analysis of Gravels at Yangluo in Wuhan City

作　　者：梅惠[1] 胡道华[1] 陈方明[1] 李中强[1] 赵锦慧[1] 

机构地区：[1]湖北大学资源环境学院,武汉430062

出　　处：《地球与环境》2011年第1期42-47,共6页Earth and Environment

基　　金：湖北自然科学基金项目(批准号:2008CDB054)资助

摘　　要：阳逻砾石层是长江中下游新生代的一个重要的岩石地层单位,不仅具有重要的地层学意义,在长江中下游古地理和古环境研究中也具有重要价值。砾石统计分析可为阳逻砾石层研究提供重要参考。阳逻砾石层砾石统计分析表明,砾径主要是中粗砾和粗砾;砾向主要是北西和南西方向;砾性主要是石英砂岩、脉石英、硅质岩、石英岩、砾岩和砂岩;砾态主要表现是磨圆度好。由此分析认为阳逻砾石层可能为远源物质,来源方向主要为北西和南西;一个可能是来源于长江的干流以上,另一个可能是来源于长江支流倒水的上游大别山南麓;阳逻砾石层沉积时水动力条件较强,且在不同的时期沉积环境不一样。Gravels at Yangluo Town are an important rock unit in the Neozoic era in the middle and lower reaches of the Yangtze River, which are not only of important stratigraphic significance, but also of great value for the study of palaeogeography and paleoenvironment in the middle and lower reaches of the Yangtze River. Statistical analysis of gravels is of important reference. So the result of statistical analysis showed that the gravels are westwards. Lithologieally, quartz sandstone , vein quartz, etc. big in diameter, mainly extending southwestwards and north- are dominant. The gravels are mainly circular in shape. From this, it is considered that the gravels at Yangluo mainly come from two sources： one is the upper reaches of the Yangtze River and the other is the Daoshui River to the south of Dabie mountains. Hydrodynamic conditions of gravels at Yangluo are very good in the course of sedimentation, and the sedimentary environment is different in different periods.

关 键 词：砾石 砾径 砾向 砾态 砾性 阳逻砾石层 

分 类 号：P588.2[天文地球—岩石学]