收稿日期: 2004-09-22
修回日期: 2005-03-25
网络出版日期: 2005-06-25
基金资助
中国石油天然气集团公司“九五”攻关项目“银根—额济纳旗盆地综合评价及勘探目标选择”（编号：970207-34-2）及“蒙甘青地区中新生代板块构造演化与含油气盆地综合研究”(编号：970212-3-3)资助.
CHARACTERISTICS OF EARLY CRETACEOUS PROTOTYPE BASIN AND ITS CONTROL ON SOURCE ROCK IN MONGOLIA-GANSU-QINGHAI AREA
Received date: 2004-09-22
Revised date: 2005-03-25
Online published: 2005-06-25
陈启林 , 周洪瑞 , , 李相博 . 蒙甘青地区早白垩世原型盆地特征及其对烃源岩分布的控制[J]. 地球科学进展, 2005 , 20(6) : 656 -663 . DOI: 10.11867/j.issn.1001-8166.2005.06.0656
The lithofacies palaeogeography map can show the pattern of basins and mountains and the characteristics of original deposition. The map of MongoliaGansu-Qinghai area revealed lots of different sizes sedimentary basin groups formed in early Cretaceous in study area. These basins often belonged to extension rift basin, received lacustrine-fluvial deposition of Lower Cretaceous due to extensional tectonics movement of early Cretaceous. The sedimentary environments and situation of lithofacies palaeogeography of early Cretaceous are favorable for hydrocarbon. The source rocks were mainly distributed in sub-depression of Northern Qilian-Alashan fault depression Group. The source rock is a set of grey and grey to dark calcareous mudstones of lacustrine, which were controlled by lacustrine depositional system (shallow-moderate-deep lake). Besides, the distribution of source rocks were dominated by the climate belts, dry in south and moist in north'.
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