FN Archimer Export Format
PT J
TI Magma-assisted fragmentation of Pangea: Continental breakup initiation and propagation
BT 
AF GUAN, Huixin
   GEOFFROY, Laurent
   XU, Min
AS 1:1,2,3;2:4,5;3:1,2,3;
FF 1:;2:;3:;
C1 Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 511458, China
   Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China
   China-Pakistan Joint Research Centre on Earth Sciences, CAS-HEC, Islamabad 45320, Pakistan
   Université de Bretagne Occidentale, Brest 29238, France
   CNRS, UMR 6538, Laboratoire Domaines Océaniques, 29280 Plouzané, France
C2 CHINESE ACAD SCI, CHINA
   SOUTHERN MARINE SCI & ENGN GUANGDONG LAB, CHINA
   CAS HEC, PAKISTAN
   UBO, FRANCE
   CNRS, FRANCE
UM LGO
IF 6.151
TC 7
UR https://archimer.ifremer.fr/doc/00744/85647/91043.pdf
LA English
DT Article
DE ;Supercontinents;Volcanic passive margin;Non-volcanic passive margin;Large igneous province;Pangea;Breakup propagation
AB Pre-magmatic continental extension often precedes the major magmatic expulsion of large igneous provinces (LIPs). However, the cause-and-effect relationship between pre-magmatic rifting and the extrusion of large amount of magma is controversial. It remains unclear whether magmatism arises as a consequence of passive rifting or whether it is related to active upwelling of the mantle. In addition, the relationship between the pre-magmatic stages and the final breakup, with the onset of conjugate passive margins, is ambiguous. In this study, we compiled available data from six LIPs (Central Atlantic, Karoo, Parana-Etendeka, Deccan, North Atlantic, and Afar igneous provinces) that successively occurred during the fragmentation of Pangea and found that pre-magmatic rift trends may show a high obliquity or even be orthogonal with respect to the future passive margins. We conclude that syn-magmatic rifts should not be directly correlated, both structurally and dynamically, to the ancient pre-magmatic rift phase. Furthermore, following the breakup of a supercontinent, seafloor spreading usually initiates within volcanic passive margins (VPMs) and then propagates away to create non-volcanic passive margins (NVPMs) as a consequence of the consumption and cooling of a sub-lithospheric positive thermal anomaly. Major transform faults often exist between VPMs and NVPMs, acting as a mechanical barrier to mantle melting and magmatism transportation. (c) 2021 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. 
PY 2021
PD AUG
SO Gondwana Research
SN 1342-937X
PU Elsevier
VL 96
UT 000659533300004
BP 56
EP 75
DI 10.1016/j.gr.2021.04.003
ID 85647
ER

EF