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Early cretaceous topographic evolution associated with the collapse of the Mongol-Okhotsk orogen in Western Transbaikalia: an integrated analysis
- Source :
- International Geology Review, International Geology Review, In press, ⟨10.1080/00206814.2022.2139296⟩
- Publication Year :
- 2022
- Publisher :
- Informa UK Limited, 2022.
-
Abstract
- International audience; 12 The Early Cretaceous topographic evolution of Transbaikalia was largely governed by the 13 tectonic evolution of the Mongol-Okhotsk orogenic belt. The collapse of the Mongol-Okhotsk 14 orogen triggered the formation of metamorphic core complexes and associated extensional basins, 15 widespread throughout Transbaikalia, North Mongolia, and North China. Numerous lithofacies proximal sediment sources. Distal provinces also made a contribution to sedimentation indicating 29 the rise of a positive topography characterizing the exhumation of the metamorphic core 30 complexes. Overlying fine-grained formations indicate a significant smoothing of the topography, 31 suggesting that from middle Aptian, Western Transbaikalia developed in a relatively calm tectonic 32 regime. We also show that the basins of Transbaikalia were formed both in conjunction with the 33 exhumation of metamorphic cores complexes and reactivated structural sutures. Revised data on 34 dinosaur fauna and palynology, together with the dating of host deposits, provide insights on the 35 Early Cretaceous paleoenvironmental evolution.
- Subjects :
- [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry
Geology
U-Pb detrital zircons dating sediment source-to-sink analysis topographic evolution
U-Pb detrital zircons dating
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology
topographic evolution
sediment source-to-sink analysis
Subjects
Details
- ISSN :
- 19382839 and 00206814
- Database :
- OpenAIRE
- Journal :
- International Geology Review
- Accession number :
- edsair.doi.dedup.....61520e8658ce1a90cefc9ddcffe7f139