寒武、奥陶纪海平面变化与烃源岩发育关系——以塔里木盆地为例  

THE RELATIONSHIP BETWEEN SEA LEVEL CHANGE AND SOURCE ROCK DEVELOPMENT OF CAMBRIAN—ORDOVICIAN IN TALIMU BASIN

作　　者：陈新军[1] 蔡希源[2] 高志前[3] 马士忠[3] 

机构地区：[1]同济大学 [2]中国石油化工集团公司 [3]中国地质大学.北京

出　　处：《天然气工业》2005年第10期18-20,I0020,共4页Natural Gas Industry

摘　　要：文章研究了寒武—奥陶纪海平面变化与烃源岩发育的关系,并探索其烃源岩的发育模式和分布规律。认为海平面变化和地壳沉降才是烃源岩发育决定性因素,其烃源岩发育模式泥质类烃源岩主要形成于广海陆棚—半深海盆地,处于深水沉积背景;陆棚相泥质烃源岩,其形成与上升洋流的作用有关;半深海相烃源岩的形成是由于深水缺氧,沉积速率低,使得有机质富集;碳酸盐岩烃源岩分布于盆地中西部,与膏岩、盐岩有着密切的共生关系。In order to solve the distribution and discrimination problems of the source rock of Cambrian-Ordovician System in Talimu Basin, the source rock development mode and distribution laws are discussed by studying the relationship between the sea level changes and source rock development of Cambrian - Ordovician in the basin. The source rock development laws in the process of every sea level change gyration are analyzed. It is pointed out that sea level changes and earth crust subsidence are the decision factors of source rock development. The source rock development mode is summarized: the pelitic source rock with a deep water sediment background formed in vast ocean shelf-half blue ware basin; the continent shelf facies source rock has the relation with raise ocean current process; the organic matter enrichment of half blue water facies source rock is caused by deep water oxygen lack and lower sediment velocity; the carbonate source rock distribute in the middle-west part at the basin and has close relationship with gypsum rock and salt rock.

关 键 词：塔里木盆地 寒武纪 奥陶纪 海平面变化 地壳沉降 控制 烃源岩 发育 海相烃源岩 寒武-奥陶纪 

分 类 号：P618.130.1[天文地球—矿床学] P618.13[天文地球—地质学]