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Distribution of Cretaceous Proto-basin and Basin-mountain Frame Work in Iner Mongolia-Gansu-Qinghai Area(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2006年第03期
Page:
24-30
Research Field:
Publishing date:

Info

Title:
Distribution of Cretaceous Proto-basin and Basin-mountain Frame Work in Iner Mongolia-Gansu-Qinghai Area
Author(s):
LI Xiang-bo123CHEN Qi-lin2WEI Wei45ZUO Guo-chao6WANG Qi1MENG Zi-fang 1
1. Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China; 2. Northwest Branch, Research Institute of Petroleum Exploration and Development of PetroChina, Lanzhou 730020, Gansu, China; 3. School o f Graduate, Chinese Academy of Sciences, Beijing 100039, China; 4. School of Energy Resources, China Univeristy of Geosciences, Beijing 100083, China; 5. Langfang Branch, Research-Institute of Petroleum Exploration and Development of Petro- China, Langfang 065007, Hebei, China; 6. Geological Survey Institute of Gansu province, Lanzhou 730000, Gansu, China
Keywords:
Iner Mongolia-Gansu-Qinghai Area basin-mountain frame work proto-basin Cretaceous
PACS:
P542+.1
DOI:
-
Abstract:
Depositional setting and basin-mountain framework of Cretaceous proto-basin of Iner Mongolia-Gansu-Qinghai area is reconstructed based on field geological survey and previous works of others. During early Cretaceous, the studied area transferred from Late Jurassic compression and uplifting into tensional rifting stage with a northward shifting of dep- ocenter as a result of joint influence of the northerly Siberia plate, the easterly Pacific plate and the southwesterly India plate. Eight sedimentary basin groups dominated by depression and fault depression process were formed. During Late Cretaceous, those basin groups died out and there are two basin groups within Iner Mongolia-Gansu-Qinghai area and de- pocenter shifted to the eastern part of Qilian Mountain and Alashan area due to impact of collision and combination of In- dia plate with Tibet. The early Cretaceous is the mostimportant period for source rock formation and in consequence, re- construction of Cretaceous basin-mountain tectonic development and proto basin depositional setting is of great signifi- cance to the exploration of oil and gas from Cretaceous source rocks in Iner Mongolia-Gansu-Qinghai area.

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Last Update: 2006-09-20