鲁西地区馒头组下部滑塌堆积的地质特征及其意义  

Geological Features and Significance of Olistostromes from Lower Part of the Mantou Formation in the Luxi Areas, Shandong Province

作　　者：闫臻[1] 杨长春[1] 李继亮[1] 王真理[1] 肖文交[1] 徐兴旺[1] 段秋梁[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029

出　　处：《沉积学报》2005年第1期29-33,共5页Acta Sedimentologica Sinica

基　　金：中国科学院知识创新项目"环渤海(湾)地区前新生代海相典型含油气区剖析(KZCX1-SW-18)"资助。

摘　　要：华北地台馒头组以干热气候条件下的陆源细碎屑岩为主夹碳酸盐岩组成,角度不整合于太古宙泰山群之上。济南仲宫镇的馒头组底部,为厚度约 4m的滑塌堆积。岩块由灰岩和细碎屑岩组成,基质为粉砂岩。岩块内部的构造变形样式及基质中的斜层理表明,寒武纪华北地台曾存在古斜坡和构造隆升作用是诱发成岩作用过程中滑塌堆积形成的重要机制。馒头组中滑塌堆积的发现和研究,有利于进一步认识华北地台古生代古地貌、沉积环境以及古潜山的形成和演化,从而为华北地台古生代含油气盆地和古潜山的研究以及油气资源勘探提供借鉴。TheMantou Formation in the North China platform, which overlain the Archaean Taishan Group, mainly consists of terrigenous clastic rocks and carbonate intercalations. In the Zhonggong village of the Jinan city, olistotrome with thickness of about 4m occurredin the lower part of the Mantou Formation. Carbonate and fine clastic rocks is its block, and siltstone is its matrix. Deformation styles of the blocks and cross beddingwithin the blocks demonstrate that there should exist an old slope in the North China platform and tectonic uplifting had took place in the Cambrain. They were main factors toinduce olistotrome. Identifying and studying the olistostrome within the Mantou Formation is benefit to study the Paleozoicpaleogeography and sedimentary environments of the North China platform and the evolution of the buriedhills, which can provide some good evidences for the study on the Paleozoicsedimentary basin contained with abundant oil and gas and buriedhills, and for prospecting source of oil and gas.

关 键 词：华北地台 堆积 碎屑岩 古生代 鲁西地区 角度不整合 构造隆升 古潜山 含油气盆地 油气资源勘探 

分 类 号：P618[天文地球—矿床学] P542[天文地球—地质学]