汕头地区褐灰色砂质碎屑堆积物的成因  

Origin of the drab gray sand debris accumulations in Shantou, Guangdong Province

作　　者：李建生[1] 周曾权 陈诗安 

机构地区：[1]华南师范大学,广州510631 [2]汕头市地震局,汕头515041

出　　处：《地球化学》1999年第3期297-304,共8页Geochimica

摘　　要：经过野外调查和钻孔岩芯分析，以及从海侵层的分布、硅藻、孢粉组合特征、瓣鳃类化石、颗粒度分析、电子显微镜石英颗粒表面扫描和１４Ｃ 年龄测定等测试工作，认为分布在汕头市达濠区广澳东侧尖石头山山坳等处的褐灰色石英质砂堆积物，系后来经过淋溶作用，被固结起来的岩石，实际上是一种风积岩，而不是海积作用形成的“海滩岩”。因而有必要修正该“海滩岩”因莫霍面的隆起，且断距达３～５ ｋｍ 而抬升的推论。Outdoor investigation, indoor analyses and appraisal have been carried out on the drab gray sand debris accumulations occurred at Guangao, Dahao District of Shantou City, Guangdong Province. The results indicate that they are eolian deposit rocks, which were affected by the latest eluviation and cemented into rocks. They are neither sea facies deposits, nor can they stand for the earthdrusts uplifting.

关 键 词：风积岩 海侵层 岩石成因论 砂质碎屑堆积物 

分 类 号：P588.2[天文地球—岩石学]