Journal
GONDWANA RESEARCH
Volume 23, Issue 4, Pages 1342-1364Publisher
ELSEVIER
DOI: 10.1016/j.gr.2012.05.015
Keywords
Central Asian Orogenic Belt; Inner Mongolia; Paleo-Asian Ocean; Melange, foreland basin
Categories
Funding
- National Natural Science Foundation of China [40872145, 40821002]
- China geological survey projects [1212011220906]
- UNESCO-IUGS
Ask authors/readers for more resources
Based mainly on field geological observation and geochronologic data, six tectonic units have been recognized in western Inner Mongolia (China), including, from south to north: North China Craton (NCC), Southern Orogenic Belt (SOB), Hunshandake Block (HB), Northern Orogenic Belt (NOB), South Mongolia microcontinent (SMM), and Southern margin of Ergun Block (SME), suggesting that the tectonic framework of the CAOB in western Inner Mongolia is characterized by an accretion of different blocks and orogenic belts. The SOB includes, from north to south, fold belt, melange, arc-pluton belt, and retroarc foreland basin, representing a southern subduction-collision system between the NCC and HB blocks during 500-440 Ma. The NOB consists also of four units: arc-pluton belt, melange, foreland molasse basin, and fold belt, from north to south, representing a northern subduction-collision system between the HB and SMM blocks during 500-380 Ma. From the early Paleozoic, the Paleo-Asian oceanic domains subducted to the north and the south, resulting in the forming of the SOB and the NOB in 410 Ma and 380 Ma, respectively. This convergent orogenic system, therefore, constrained the consumption process of the Paleo-Asian Ocean in western Inner Mongolia. A double subduction-collision accretionary process is the dominant geodynamic feature for the eastern part of the CAOB during the early to middle Paleozoic. (C) 2012 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available