From arc-continent collision to ocean closure: Lower Cretaceous Shamuluo Formation in the western segment of the Bangong–Nujiang suture zone, central Tibet
One of most hotly debated topics concerning the Late Mesozoic evolution of Tethyan and the Tibetan Plateau is the timing of the closure of the Meso-Tethys ocean, which is represented by the Bangong–Nujiang suture zone. The Upper Jurassic–Lower Cretaceous Shamuluo Formation, which unconformably overl...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2021-09-01
|
Series: | Geoscience Frontiers |
Subjects: | |
Online Access: | http://www.sciencedirect.com/science/article/pii/S1674987121000712 |
id |
doaj-bc97bc043e934c32992f675539f14473 |
---|---|
record_format |
Article |
spelling |
doaj-bc97bc043e934c32992f675539f144732021-09-03T04:44:08ZengElsevierGeoscience Frontiers1674-98712021-09-01125101207From arc-continent collision to ocean closure: Lower Cretaceous Shamuluo Formation in the western segment of the Bangong–Nujiang suture zone, central TibetAn-Bo Luo0Jian-Jun Fan1Bo-Chuan Zhang2Jian-Zhen Zhang3Hang Li4Meng-Long Duan5College of Earth Sciences, Jilin University, Changchun 130061, ChinaCollege of Earth Sciences, Jilin University, Changchun 130061, China; Key Laboratory of Mineral Resources Evaluation in Northeast Asia, Ministry of Natural Resources, Changchun 130061, China; Corresponding author at: 2199 Jianshe Street, College of Earth Sciences, Jilin University, Changchun 130061, China.College of Earth Sciences, Jilin University, Changchun 130061, ChinaHebei Institute of Regional Geological Survey, Langfang 065000, Hebei, ChinaCollege of Earth Sciences, Jilin University, Changchun 130061, ChinaCollege of Earth Sciences, Jilin University, Changchun 130061, ChinaOne of most hotly debated topics concerning the Late Mesozoic evolution of Tethyan and the Tibetan Plateau is the timing of the closure of the Meso-Tethys ocean, which is represented by the Bangong–Nujiang suture zone. The Upper Jurassic–Lower Cretaceous Shamuluo Formation, which unconformably overlies the older Mugagangri Group accretionary complex, provides important information on the closure of the Meso-Tethys Ocean. This paper precisely confines the depositional age of the Shamuluo Formation in the western segment of the Bangong–Nujiang suture zone, extending it from the Late Jurassic to the Albian. Combined with the results of previous studies, we suggest that the Shamuluo Formation in the Awengco–Baerqiong region mainly contains a bathyal Berriasian–Hauterivian subunit and a shallow-marine Albian subunit. Provenance analysis indicates that the Berriasian–Hauterivian subunit was mainly derived from the Jurassic southern Qiangtang magmatic arc, while the Albian subunit was derived from the coeval volcanic rocks and the Upper Carboniferous–Upper Permian strata in the southern Qiangtang terrane. Thus, the two subunits of the Shamuluo Formation have significant distinct sedimentary facies and provenances, indicating that they were deposited in different tectonic settings. Based on the regional geological data, we suggest that the bathyal Berriasian–Hauterivian subunit and the shallow-marine Albian subunit of the Shamuluo Formation should be interpreted as a record of the oceanic arc-continent collision and the Lhasa–Qiangtang soft-collision, respectively. Thus, the closure time of the Meso-Tethys Ocean is at least limited to the Albian.http://www.sciencedirect.com/science/article/pii/S1674987121000712Tibetan PlateauMeso-Tethys OceanShamuluo FormationOcean closureAlbian |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
An-Bo Luo Jian-Jun Fan Bo-Chuan Zhang Jian-Zhen Zhang Hang Li Meng-Long Duan |
spellingShingle |
An-Bo Luo Jian-Jun Fan Bo-Chuan Zhang Jian-Zhen Zhang Hang Li Meng-Long Duan From arc-continent collision to ocean closure: Lower Cretaceous Shamuluo Formation in the western segment of the Bangong–Nujiang suture zone, central Tibet Geoscience Frontiers Tibetan Plateau Meso-Tethys Ocean Shamuluo Formation Ocean closure Albian |
author_facet |
An-Bo Luo Jian-Jun Fan Bo-Chuan Zhang Jian-Zhen Zhang Hang Li Meng-Long Duan |
author_sort |
An-Bo Luo |
title |
From arc-continent collision to ocean closure: Lower Cretaceous Shamuluo Formation in the western segment of the Bangong–Nujiang suture zone, central Tibet |
title_short |
From arc-continent collision to ocean closure: Lower Cretaceous Shamuluo Formation in the western segment of the Bangong–Nujiang suture zone, central Tibet |
title_full |
From arc-continent collision to ocean closure: Lower Cretaceous Shamuluo Formation in the western segment of the Bangong–Nujiang suture zone, central Tibet |
title_fullStr |
From arc-continent collision to ocean closure: Lower Cretaceous Shamuluo Formation in the western segment of the Bangong–Nujiang suture zone, central Tibet |
title_full_unstemmed |
From arc-continent collision to ocean closure: Lower Cretaceous Shamuluo Formation in the western segment of the Bangong–Nujiang suture zone, central Tibet |
title_sort |
from arc-continent collision to ocean closure: lower cretaceous shamuluo formation in the western segment of the bangong–nujiang suture zone, central tibet |
publisher |
Elsevier |
series |
Geoscience Frontiers |
issn |
1674-9871 |
publishDate |
2021-09-01 |
description |
One of most hotly debated topics concerning the Late Mesozoic evolution of Tethyan and the Tibetan Plateau is the timing of the closure of the Meso-Tethys ocean, which is represented by the Bangong–Nujiang suture zone. The Upper Jurassic–Lower Cretaceous Shamuluo Formation, which unconformably overlies the older Mugagangri Group accretionary complex, provides important information on the closure of the Meso-Tethys Ocean. This paper precisely confines the depositional age of the Shamuluo Formation in the western segment of the Bangong–Nujiang suture zone, extending it from the Late Jurassic to the Albian. Combined with the results of previous studies, we suggest that the Shamuluo Formation in the Awengco–Baerqiong region mainly contains a bathyal Berriasian–Hauterivian subunit and a shallow-marine Albian subunit. Provenance analysis indicates that the Berriasian–Hauterivian subunit was mainly derived from the Jurassic southern Qiangtang magmatic arc, while the Albian subunit was derived from the coeval volcanic rocks and the Upper Carboniferous–Upper Permian strata in the southern Qiangtang terrane. Thus, the two subunits of the Shamuluo Formation have significant distinct sedimentary facies and provenances, indicating that they were deposited in different tectonic settings. Based on the regional geological data, we suggest that the bathyal Berriasian–Hauterivian subunit and the shallow-marine Albian subunit of the Shamuluo Formation should be interpreted as a record of the oceanic arc-continent collision and the Lhasa–Qiangtang soft-collision, respectively. Thus, the closure time of the Meso-Tethys Ocean is at least limited to the Albian. |
topic |
Tibetan Plateau Meso-Tethys Ocean Shamuluo Formation Ocean closure Albian |
url |
http://www.sciencedirect.com/science/article/pii/S1674987121000712 |
work_keys_str_mv |
AT anboluo fromarccontinentcollisiontooceanclosurelowercretaceousshamuluoformationinthewesternsegmentofthebangongnujiangsuturezonecentraltibet AT jianjunfan fromarccontinentcollisiontooceanclosurelowercretaceousshamuluoformationinthewesternsegmentofthebangongnujiangsuturezonecentraltibet AT bochuanzhang fromarccontinentcollisiontooceanclosurelowercretaceousshamuluoformationinthewesternsegmentofthebangongnujiangsuturezonecentraltibet AT jianzhenzhang fromarccontinentcollisiontooceanclosurelowercretaceousshamuluoformationinthewesternsegmentofthebangongnujiangsuturezonecentraltibet AT hangli fromarccontinentcollisiontooceanclosurelowercretaceousshamuluoformationinthewesternsegmentofthebangongnujiangsuturezonecentraltibet AT menglongduan fromarccontinentcollisiontooceanclosurelowercretaceousshamuluoformationinthewesternsegmentofthebangongnujiangsuturezonecentraltibet |
_version_ |
1717818124697337856 |