Nature of the Paleo-Pacific Subduction Along the East Asian Continental Margin in the Mesozoic: Insights From the Sedimentary Record of West Sarawak, Borneo

Zhou，Yang1,2,3; Carter，Andrew4; Wu，Jonny5; Yao，Yongjian6; Zhu，Rongwei6; Liu，Hailing7; Liu，Wei3; Zhao，Qi8; Zhu，Zuofei6; Yan，Yi8; Liu，Qingsong3

2023-04-28

10.1029/2022GL102370

Geophysical Research Letters   影响因子和分区

0094-8276

1944-8007

The Mesozoic subduction history of the Paleo-Pacific plate below the East Asian margin remains contentious, in part because the southern part is poorly understood. To address this, we conducted a sediment provenance study to constrain Mesozoic subduction history below West Sarawak, Borneo. A combination of detrital zircon U-Pb geochronology, heavy minerals, trace element, and bulk rock Nd isotope data were used to identify the tectonic events. The overall maturity of mineral assemblages, dominantly felsic sources, abundant Precambrian-aged zircons, and low εNd(0) values (average −13.07) seen in Late Triassic sedimentary rocks suggest a period of inactive subduction near Borneo. Slab shallowing subduction occurred between 200 and 170 Ma based on subdued magmatism and tectonic compression across West Sarawak. From c. 170 to 70 Ma there was widespread magmatism and we interpret the Paleo-Pacific slab steepened. Collectively, we show the Paleo-Pacific plate subduction had variable slab dip histories in Borneo.

inactive subduction Paleo-Pacific plate shallowing subduction slab steepened subduction history

SCI ; EI

英语

NI论文

通讯

National Natural Science Foundation of China[41874076];National Natural Science Foundation of China[41874078];National Natural Science Foundation of China[42106079];National Natural Science Foundation of China[92158208];Ministry of Natural Resources[KLMMR-2022-G05];

Geology

Geosciences, Multidisciplinary

WOS:000999832900001

AMER GEOPHYSICAL UNION

20232014081789

Binary alloys ; Geochronology ; Lead alloys ; Sedimentary rocks ; Sedimentology ; Tectonics ; Trace elements ; Uranium alloys

Geology:481.1 ; Geophysics:481.3 ; Minerals:482.2 ; Gems:482.2.1 ; Lead and Alloys:546.1 ; Minor, Precious and Rare Earth Metals and Alloys:547 ; Radioactive Materials, General:622.1

GEOSCIENCES

2-s2.0-85159021549

Scopus

1.School of National Safety and Emergency Management,Beijing Normal University,Zhuhai,China
2.Key Laboratory of Marine Mineral Resources,Ministry of Natural and Resources,Guangzhou,China
3.Centre for Marine Magnetism (CM2),Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,China
4.Department of Earth and Planetary Sciences,Birkbeck,University of London,London,United Kingdom
5.Department of Earth & Atmospheric Sciences,University of Houston,Houston,United States
6.Guangzhou Marine Geological Survey,Guangzhou,China
7.South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou,China
8.Key Laboratory of Ocean and Marginal Sea Geology,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,China

Zhou，Yang,Carter，Andrew,Wu，Jonny,et al. Nature of the Paleo-Pacific Subduction Along the East Asian Continental Margin in the Mesozoic: Insights From the Sedimentary Record of West Sarawak, Borneo[J]. Geophysical Research Letters,2023,50(8).

Zhou，Yang.,Carter，Andrew.,Wu，Jonny.,Yao，Yongjian.,Zhu，Rongwei.,...&Liu，Qingsong.(2023).Nature of the Paleo-Pacific Subduction Along the East Asian Continental Margin in the Mesozoic: Insights From the Sedimentary Record of West Sarawak, Borneo.Geophysical Research Letters,50(8).

Zhou，Yang,et al."Nature of the Paleo-Pacific Subduction Along the East Asian Continental Margin in the Mesozoic: Insights From the Sedimentary Record of West Sarawak, Borneo".Geophysical Research Letters 50.8(2023).