Show simple item record

dc.contributor.authorLi, S.
dc.contributor.authorWilde, Simon
dc.contributor.authorHe, Z.
dc.contributor.authorJiang, X.
dc.contributor.authorLiu, R.
dc.contributor.authorZhao, L.
dc.identifier.citationLi, S. and Wilde, S. and He, Z. and Jiang, X. and Liu, R. and Zhao, L. 2014. Triassic sedimentation and postaccretionary crustal evolution along the Solonker suture zone in Inner Mongolia, China. Tectonics. 33: pp. 960-981.

Detrital zircon U-Pb dating of the Xingfuzhilu Formation in southern Inner Mongolia yields a maximum depositional age of around 220 Ma. The predominantly Permian and Triassic zircons are characterized by oscillatory zoning and euhedral shapes, with mostly positive zircon εHf(t) values (+2.0 to +16.4), indicating that they were derived from a proximal magmatic source. Early-Middle Paleozoic zircons have variable zircon εHf(t) values from −6.2 to +11.2 and are characterized by weak oscillatory zoning and subhedral-subrounded shapes, suggesting that the sources are a proximal magmatic arc, possibly mixed with components of the Ondor Sum magmatic arc and the magmatic arc at the northern margin of the North China Craton. The remnants of Precambrian blocks in the southeastern Central Asian Orogenic Belt (CAOB), and the North China Craton may also have been a minor source region for the Xingfuzhilu succession. These results, combined with regional data, indicate that a closing remnant ocean basin or narrow seaway possibly existed in the Middle Permian (Guadalupian) immediately prior to final collision of the CAOB and closure of the Paleo-Asian Ocean. Subsequent collision resulted in the crustal uplift and thickening along the Solonker suture zone, accompanied by possible slab break-off and lithospheric delamination during the Latest Permian to Middle Triassic. The resultant orogen in the Late Triassic underwent exhumation and denudation of rocks in response to the postorogenic collapse and regional extension. Vertical crustal growth in the Triassic is documented by detrital zircons from the Xingfuzhilu Formation and appears to have been widespread across entire eastern CAOB.

dc.publisherAmerican Geophysical Union
dc.titleTriassic sedimentation and postaccretionary crustal evolution along the Solonker suture zone in Inner Mongolia, China
dc.typeJournal Article

Copyright © 2014 American Geophysical Union. All Rights Reserved

curtin.departmentDepartment of Applied Geology
curtin.accessStatusOpen access

Files in this item


This item appears in the following Collection(s)

Show simple item record