Geochemical Constrains of Lamprophyres: Clues of Mesozoic Tectonic Interaction between the South China Block and North China Craton in Northern Jiangsu Province

2022 ◽  
Author(s):  
Qi Hou ◽  
Xiaoyong Yang ◽  
Jun Tang ◽  
Lei Liu
Keyword(s):  
South China ◽  
North China Craton ◽  
North China ◽  
Jiangsu Province ◽  
South China Block ◽  
The South

Detrital zircon geochronology of pre-Cretaceous strata: tectonic implications for the Jiangnan Orogen, South China

2014 ◽  
Vol 151 (6) ◽  
pp. 975-995 ◽  
Author(s):  
JINBAO SU ◽  
SHUWEN DONG ◽  
YUEQIAO ZHANG ◽  
YONG LI ◽  
XUANHUA CHEN ◽  
...  
Keyword(s):  
South China ◽  
North China ◽  
Seismic Profile ◽  
Upper Jurassic ◽  
Detrital Zircons ◽  
South China Block ◽  
Yangtze Block ◽  
The South ◽  
Provenance Data ◽  
Cathaysia Block

AbstractFifteen sandstone samples taken from pre-Cretaceous strata of the Yangtze Block are analysed to constrain the evolution of the South China Block, especially the assembly between the Yangtze and Cathaysia blocks. The results show that the maximum depositional age of the Neoproterozoic Lengjiaxi Group adjacent to the Cathaysia Block isc. 830 Ma, differing from that of the Kunyang and Dahongshan groups (> 960 Ma) on the southwestern margin of the Yangtze Block. The detrital zircons from Palaeozoic samples from the Yangtze Block have similar age populations to those in the Cathaysia Block, and they may originate from the Cathaysia Block according to palaeogeographic, palaeocurrent and former research data. The detrital zircons of Middle–Upper Jurassic sandstones in the southwestern and central Yangtze Block yield dominant age populations at 2.0–1.7 Ga and subordinate groups of 2.6–2.4 Ga, 0.8–0.7 Ga and 0.6–0.4 Ga. The Upper Triassic strata may be derived from the southern Yangtze and North China blocks due to the collisions between the Indosina, South China and North China blocks, whereas the Jurassic sediments may be partly derived from uplift and erosion of the Jiangnan Orogen due to an intracontinental orogeny induced by Pacific subduction towards the Eurasia Plate. The detrital age spectra and provenance data for basement in the South China Block are analysed and compared with each other. The South China Block has affinity with Australia not only in the Columbia supercontinent but also in the Rodinia supercontinent. We infer the existence of an ancient orogen under the western Jiangnan Orogen, which may have occurred during the Columbia age, earlier than the Sibao orogeny. This is supported by seismic profile proof from the SinoProbe.

XKS splitting-based upper-mantle deformation in the Jiaodong Peninsula records the boundary between the North China Craton and South China Block

2020 ◽  
Vol 222 (2) ◽  
pp. 956-964
Author(s):  
Chenglong Wu ◽  
Tao Xu ◽  
Yinshuang Ai ◽  
Weiyu Dong ◽  
Long Li
Keyword(s):  
South China ◽  
North China Craton ◽  
North China ◽  
Pacific Plate ◽  
Late Triassic ◽  
South China Block ◽  
The North ◽  
Jiaodong Peninsula ◽  
Pacific Plate Subduction ◽  
Plate Subduction

SUMMARY The Jiaodong Peninsula consists of the Jiaobei massif and the Northern Sulu UHP massif. These are separated by the Wulian suture zone (WSZ), a key region for understanding the collision between the North China Craton (NCC) and South China Block (SCB). To interpret this collisional zone, a broad-band seismic profile of 20 stations was installed across the WSZ. Shear wave splitting analysis of teleseismic data revealed a contrast in the splitting patterns beneath different structural zones of the Jiaodong Peninsula. The anisotropic structures of the Jiaobei massif and Northern Sulu UHP massif can be explained by a single anisotropic layer model with WNW-ESE or E-W oriented fast directions. In the WSZ, splitting parameters exhibit pronounced variation in backazimuths indicating a two-layer anisotropy pattern. The lower layer exhibits a WNW-ESE fast direction consistent with that observed in the other two regions. Because the fast direction is generally parallel to the present-day direction of Pacific plate subduction, the anisotropy most likely represents asthenospheric return flow in the big mantle wedge caused by Pacific plate subduction. The upper layer exhibits an NE fast direction, that is, parallel to faulting associated with the WSZ. The lithosphere may preserve fossilized anisotropy induced by the Late Triassic collision of the NCC and SCB even after subsequent destruction and thinning from the Late Mesozoic to Cenozoic. We infer that the WSZ represents a lithospheric-scale structural boundary between the NCC and SCB.

Mesozoic Hydrothermal Overprint on Carboniferous Bauxite in China

2020 ◽  
Author(s):  
Ruixue Wang ◽  
Qingfei Wang ◽  
I. Tonguç Uysal ◽  
Erick Ramanaidou ◽  
Jun Deng ◽  
...  
Keyword(s):  
Organic Matter ◽  
Raman Spectra ◽  
South China ◽  
Intensity Ratio ◽  
North China ◽  
South China Block ◽  
The South ◽  
North China Block ◽  
The North ◽  
North And South

Abstract Bauxite is the world’s main source of aluminum and typically consists of gibbsite, boehmite, and minor amounts of diaspore. However, bauxite deposits from the North and South China blocks consist mostly of diaspore and associated minerals, including anatase and illite. Much of this illite is authigenic and occurs as three polytypes (1M, 1Md, and 2M1), with Kübler indices ranging from 0.23 to 0.47 indicating precipitation temperatures of 175° to 300°C. The Raman spectra of anatase show an intensity ratio of <1.5 for G (~1,600 cm–1) and D bands (~1,350 cm–1) diagnostic of organic matter, suggesting its presence during bauxite sedimentation followed by heating (165° to 270°C). The K-Ar ages of authigenic illite from the South China block (178–137 Ma) and the North China block (214–203 Ma) are synchronous with known regional Mesozoic tectono-thermal events generating hydrothermal overprints resulting in (1) the formation of illite, (2) the conversion of some diaspores from thermal of gibbsite and boehmite, and (3) the heating of anatase postsedimentation of the Carboniferous bauxites.

Spatio-temporal evolution and dynamic origin of Jurassic-Cretaceous magmatism in the South China Block

2021 ◽  
Vol 217 ◽  
pp. 103605
Author(s):  
Xianzhi Cao ◽  
Nicolas Flament ◽  
Sanzhong Li ◽  
R. Dietmar Müller
Keyword(s):  
South China ◽  
Temporal Evolution ◽  
South China Block ◽  
The South ◽  
Spatio Temporal ◽  
Cretaceous Magmatism

scholarly journals Thrusting, exhumation and basin fill on the western margin of the South China block during India-Asian collision

2018 ◽  
Author(s):  
Kai Cao ◽  
Guocan Wang ◽  
Philippe Hervé Leloup ◽  
Wei Mahéo ◽  
Yadong Xu ◽  
...  
Keyword(s):  
South China ◽  
South China Block ◽  
The South ◽  
Western Margin ◽  
Basin Fill
Sign in / Sign up

Export Citation Format

Share Document