2011年6月1日 · A kinematic and geochronological study has been carried out on the Triassic high-strain shear zones in Hainan Island, the southern South China Block. There are WNW- and NE-trending high-strain shear zones with greenschist- to amphibolite-facies metamorphism in …

2024年9月1日 · The Permo–Triassic magmatism produced calc-alkaline I-type granites, peraluminous S-type granites, and minor alkaline rocks distributed in the continental hinterland and on Hainan Island that are interpreted to be the manifestations of flat-slab subduction of the Paleo–Pacific Plate or a collision between South China and other blocks (Li et ...

2022年12月1日 · We provide the first evidence of Triassic amphibolite-facies metamorphism in northeastern Hainan and, from a metamorphic perspective, discuss the Triassic tectonic evolution of Hainan Island and its temporal–spatial relationships with …

2020年2月11日 · Hainan Island may have lain at the boundary between the Tethyan and Pacific domains since the late Paleozoic. Permo–Triassic granitoids outcropped on the island provide insight into Mesozoic tectonic evolution and potential dynamics.

During late Permian to early Triassic, the Hainan Island experienced a tectonic transition from oceanic subduction to arc-continent collision, which was closely associated with the evolution of the Paleo-Tethys Ocean.

2022年1月3日 · We speculate that Hainan Island was mainly affected by the Tethyan tectonic domain during the Permian–Triassic, which involved closure of the Palaeo-Tethys Ocean, collision of the Indochina and South China blocks, and subsequent post-collisional extension.

2013年3月7日 · This work studies new petrological and geochemical data and zircon U-Pb ages for bimodal intrusive rocks from Xinglong region, Hainan Island. Zircon U-Pb dating yields mean 238U/206Pb ages of 238 ± 2 Ma and 234 ± 2 Ma for diabasic and granitic phases, respectively, representing the Middle Triassic emplacement.

2011年6月1日 · The middle Triassic structural pattern of Hainan Island is spatially and temporally compatible with those of the South China and Indochina Blocks, and thus might be a derivation from the ...

Triassic magmatic rocks linked to subduction and accretion processes on Hainan Island thus not only play a key role in the resolution of local geological history, but also provide an opportunity for evaluating the broader tectonic evolution of the Indo-China and South China blocks.

2017年12月15日 · This study presents zircon U-Pb ages and geochemistry of granites and basic diabase veins in Dazhou Island located 5 km southeast of Hainan Island. The age for granites is 237.2 Ma (MSWD = 0.14, n = 14), suggesting that they were emplaced in the late middle Triassic and are products of magmatic-tectonic episodes during the closure of paleo-Tethys.