10.6084/m9.figshare.3453017.v1
Zhenbing She
Zhenbing
She
Changqian Ma
Changqian
Ma
Yusheng Wan
Yusheng
Wan
Jinyang Zhang
Jinyang
Zhang
Min Li
Min
Li
Ling Chen
Ling
Chen
Wenjing Xu
Wenjing
Xu
Yanqing Li
Yanqing
Li
Longfei Ye
Longfei
Ye
Jian Gao
Jian
Gao
An Early Mesozoic transcontinental palaeoriver in South China: evidence from detrital zircon U–Pb geochronology and Hf isotopes
Geological Society of London
2016
South China Craton
Ga
South China
Hf isotopes Detrital zircon geochronology
West China
Cathaysia Block
Mesozoic
Geology
2016-06-21 11:04:39
Dataset
https://geolsoc.figshare.com/articles/dataset/An_Early_Mesozoic_transcontinental_palaeoriver_in_South_China_evidence_from_detrital_zircon_U_Pb_geochronology_and_Hf_isotopes/3453017
<p>Detrital zircon geochronology reveals that Late Triassic–Early Jurassic fluvial sandstones from the major basins of the South
China Craton have similar age patterns and define four populations at 2.6–2.4 Ga, 2.0–1.7 Ga, 850–700 Ma and 480–210 Ma. The
late Palaeoproterozoic group is predominant in all of the five samples, and yielded remarkable age peaks at <em>c</em>. 1.85 Ga. These zircons have ϵ<sub>Hf</sub>(t) values between −22.5 and +3.6, suggesting derivation from reworked Archaean crust and minor juvenile crustal additions
in the late Palaeoproterozoic. These characteristics differ from those of the Yangtze Block but correlate well with those
of samples from the eastern Cathaysia Block. Palaeocurrent analysis of the Early Mesozoic sandstones shows predominant west-
and NW-directed palaeoflows, supporting derivation of the sediments from the Cathaysia Block. The remarkable similarities
in provenance signatures and spatial changes of lithofacies of the Triassic–Jurassic around the South China Craton delineate
an east–west-trending sedimentary zone extending from Korea to West China. Accumulation of these sediments was probably related
to the development of an active continental margin produced by westward subduction of the Palaeo-Pacific Plate. A <em>c</em>. 2000 km long westerly draining transcontinental palaeoriver probably had existed in the Early Mesozoic and fed the basins
in Korea, South China and West China.
</p>