Mesozoic overthrust tectonics in south China

Hsü, Kenneth J.; Shu, Sun; Li, Jiliang; Chen, Haihong; Haipo, Pen; Şengör, A. M. Celâl

doi:10.1130/0091-7613(1988)016<0418:motisc>2.3.co;2

Cited by 267 publications

(84 citation statements)

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“…However, alternative hypotheses have been proposed, implying a Mesozoic collision in SE China ( [Hsü et al, 1988], [Hsü et al, 1990] and [Xiao and He, 2005]). The hypothesis of a Mesozoic alpine-type collision advocated by (Hsü et al, 1988) and (Hsü et al, 1990), has been questioned by several authors pointing out the contradiction with field data (e.g. [Rowley et al, 1989], [Gupta, 1989] and ).…”

Section: Discussion Geodynamic Evolutionmentioning

confidence: 99%

Structural development of the Lower Paleozoic belt of South China: Genesis of an intracontinental orogen

Charvet

Shu

Faure

et al. 2010

Journal of Asian Earth Sciences

386

250

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An extensive structural study of Wuyishan and surrounding areas (South China) brings data on the structures formed prior to the Devonian unconformity, building the Lower Paleozoic belt. An Ordovician tectonic event was responsible for: (i) south-directed structures in the Wuyishan proper and its southern border, related to both thin and thick-skinned tectonics, accompanied by metamorphism and crustal thickening; (ii) north-directed structures to the west of Ganjiang Fault and north of Jiangshan-Shaoxing Fault, where only thin-skinned tectonics is visible. The southward deformation accommodating the shortening includes emplacement of thrust sheets, involving deep crustal material and some mantle peridotite, and likely repetition of continental material, both responsible for crustal thickening. The orogeny was due to the underthrusting of the southern part of the South China Block beneath the northern part of this block, closing the pre-existing Nanhua rift, created at around 850-800 Ma, and involving the rift sedimentary fill in the southward thrusting. The synmetamorphic tectonic piling was followed by anatexis and granite emplacement at around 440-390 Ma. Our new U-Th-Pb EPMA monazite dating gives ages of 433 ± 9 Ma and 437 ± 5 Ma (Early Silurian) for the main anatectic event, and a younger age of 412 ± 5 Ma (Late Silurian-Early Devonian) for a late re-heating process. The Lower Paleozoic belt is an intracontinental orogen, without oceanic suture record. It shows some similarities with the Cenozoic European Pyrénées Chain, with a strong asymmetry.

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Section: Discussion Geodynamic Evolutionmentioning

confidence: 99%

Structural development of the Lower Paleozoic belt of South China: Genesis of an intracontinental orogen

Charvet

Shu

Faure

et al. 2010

Journal of Asian Earth Sciences

386

250

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“…Although some evidence of geologic events during Late Permian and Early Triassic has been uncovered [12 14,60,61] , different viewpoints remain on the tectonic model of South China in that period. Hsü et al [55] proposed an Alpine-type collisional orogenesis in this region. However, this collision model raise considerable interests among researchers [17,58,62,63] .…”

Section: Geologic Implicationsmentioning

confidence: 97%

U-Pb zircon geochronology and Hf isotope study of metamorphosed basic-ultrabasic rocks from metamorphic basement in southwestern Zhejiang: The response of the Cathaysia Block to Indosinian orogenic event

Xiang

Zhang

Zhou

et al. 2008

Sci. China Ser. D-Earth Sci.

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A combined study using LA-ICP-MS U-Pb dating, Hf isotopes, trace elements and the Ti-in-zircon geothermometer was carried out on zircons from the metamorphosed basic-ultrabasic rocks in the metamorphic basement of the Cathaysia Block, southwestern Zhejiang Province. The formation and metamorphic ages of the rocks from the metamorphic basement of the Cathaysia Block were determined based on zircon U-Pb geochronology. The age for the magmatic crystalline zircons from the protolith is about 1.85 Ga. The H Hf (t) values of the older zircons were from 7 to 3, with two-stage model Hf ages (T DM2 LC ) of about 2.9 to 3.4 Ga, indicating that the source material was derived from anatexis and recycling of the Archean crust. The newly formed metamorphic zircons yielded U-Pb ages of 260 230 Ma. The metamorphic temperature calculated using the Ti-in-zircon geothermometer ranged from 610 to 720 , consistent with the results from petrographic observations, indicating that the Cathaysia Block experienced an amphibolite facies metamorphism during the Indosinian. Results from this study provided an important timeframe for the tectonic evolution in South China and the Southeast Asia during the Late Permian and Early Triassic times.

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“…Recently, the studies on influencing scale and manifestation of this movement in interior of SC are rare and obtained recognitions are still controversial. Four viewpoints about geneses of Indosinian granites in SC have been given: (1) these granites were derived from the intracontinental collision within SCB [17,18] ; (2) they were related to the subduction of the Pacific plate [19] ; (3) they were derived from partial melting of thickened curst caused by collision [20] ; and (4) the early Indosinian granites (T 1 -T 2 1 ) were syn-collisional granites, the late ones (T 2 2 -T 3 )…”

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confidence: 99%

Chronological and geochemical studies of granite and enclave in Baimashan pluton, Hunan, South China

Chen

Hongye³

et al. 2007

SCI CHINA SER D

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Zircon LA-ICP-MS U-Pb dating reveals that the Baimashan Pluton is composed mainly of late Indosinian (204.5±2.8 Ma-209.2±3.8 Ma) biotite granodiorites/monzonitic granites (LIGs) and early Yanshanian (176.7±1.7 Ma) two-micas monzonitic granites (EYGs), and the coeval (203.2±4.5 Ma-205.1±3.9 Ma) mafic microgranular enclaves (MMEs) are generally found in the former. In addition, the ages of cores within zircons from LIGs and MMEs ranging from 221.4±4.0 Ma to 226.5±4.1Ma provide evidence of multistage magma intrusion during Indosinian in the study area. Measured 3010±20.6 Ma of inherited zircon age suggests that there may be recycling Archaean curstal material in existence in this area. LIGs and EYGs share some similar geochemical features: subalkaline and peraluminous granites, enrichment of Th, U, K, Ta, Zr, Hf and LREE but depletion of Ba, Nb, P, Ti and Eu, low ε Nd (t) values but high ( 87 Sr/ 86 Sr) i ratios, and old T 2DM (ca. 1.9-2.0 Ga). The behaviors of incompatible elements and REE are mainly dominated by fractional crystallization of plagioclase, K-feldspar, ilmenite and apatite, but that of Sr isotope mainly controlled by EC-AFC. They are crust-sourced and derived from partial melting of paleo-Proterozoic metagreywackes and related to biotite dehydration melting. LIGs are formed in post-collisional tectonic setting as crustal local extension and thinning during late Indosinian. But EYGs may be evolved products of congeneric granitic magma with LIGs formed in late Indoinian, which were emplaced again when crust underwent extensive thinning and extension in post-orogenic tectonic setting during Yanshanian in SC after undergoing EC-AFC. MMEs should be cognate enclaves and derived from liquid immiscibility of host magma. granite, mafic microgranular enclave, zircon LA-ICP-MS dating, lithogenesis, EC-AFC

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Mesozoic overthrust tectonics in south China

Cited by 267 publications

References 0 publications

Structural development of the Lower Paleozoic belt of South China: Genesis of an intracontinental orogen

Structural development of the Lower Paleozoic belt of South China: Genesis of an intracontinental orogen

U-Pb zircon geochronology and Hf isotope study of metamorphosed basic-ultrabasic rocks from metamorphic basement in southwestern Zhejiang: The response of the Cathaysia Block to Indosinian orogenic event

Chronological and geochemical studies of granite and enclave in Baimashan pluton, Hunan, South China

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