DOI: 10.1016/j.palaeo.2017.06.005
论文题名: Permo-Triassic detrital records of South China and implications for the Indosinian events in East Asia
作者: Hu L. ; Cawood P.A. ; Du Y. ; Xu Y. ; Wang C. ; Wang Z. ; Ma Q. ; Xu X.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
语种: 英语
英文关键词: Greater Youjiang Basin
; Hainan Island
; Paleo-Pacific
; Paleo-Tethys
; Permian-Triassic orogeny
英文摘要: Provenance analyses of Lower to Middle Triassic strata from the Greater Youjiang Basin along with the Permian strata of Hainan Island, provide a record of the collisional assembly of the South China Craton and Indochina Block and their incorporation into Asia. Detrital zircons from Lower and Middle Triassic samples show similar overall age spectra ranging from Archean to Triassic with major age groups at 300-250. Ma, 480-420. Ma, and 1200-900. Ma, as well as at 400-300. Ma in one Triassic sample. Permian siltstones from Hainan Island, to the southeast of the Greater Youjiang Basin, record different age spectra with major age groups at 400-300. Ma and 530-420. Ma and subordinate components at 1200-900. Ma and 1900-1700. Ma. These age data in combination with available paleocurrent data and regional geological relations suggest that Precambrian detrital zircons were derived from the Precambrian basement or recycled from the overlying early Paleozoic sedimentary rocks that contain Precambrian detritus. Early Paleozoic detrital zircons were derived from igneous rocks in the South China Craton. Devonian-Triassic detrital zircons in the Triassic strata were likely sourced from coeval magmatic activity related to closure of Paleo-Tethys branch ocean that lay to the southwest, whereas 400-300. Ma detrital zircons in the Permian siltstones of Hainan Island were likely derived from a Paleozoic magmatic arc source that extended along the eastern-southeastern margin of China from Hainan Island to Japan in response to subduction of the Paleo-Pacific oceanic crust.Detrital zircon, trace element, and sandstone modal data for Permo-Triassic strata from the Greater Youjiang Basin indicate that the basin evolved from a trailing-edge passive margin setting to a peripheral foreland basin during closure of the Paleo-Tethys Ocean and collision between Indochina and South China. The initiation time of the foreland basin decreases from southeast to southwest across the basin, probably reflecting oblique collision. In contrast, the Permian strata on Hainan Island record a provenance history distinct from the Greater Youjiang Basin, which is related to late Paleozoic to Mesozoic subduction of the Paleo-Pacific Plate beneath South China. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67896
Appears in Collections: 过去全球变化的重建
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作者单位: Collage of Marine Geosciences, Key Laboratory of Submarine Geosciences and Prospecting Technology, Ocean University of China, 238 Songling Road, Qingdao 266100, PR China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology (QNLM), Qingdao 266061, PR China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, PR China; School of Earth, Atmosphere and Environment, Monash University, Clayton, Victoria, Australia; Department of Earth Sciences, University of St. Andrews, Saint Andrews, UK; Institute of Geology and Geophysics, University of Chinese Academy of Sciences, Beijing 100029, PR China
Recommended Citation:
Hu L.,Cawood P.A.,Du Y.,et al. Permo-Triassic detrital records of South China and implications for the Indosinian events in East Asia[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01