Palaeozoic tectonics and evolutionary history of the Qinling orogen: Evidence from geochemistry and geochronology of ophiolite and related volcanic rocks

Dong, Yunpeng; Zhang, Guowei; Hauzenberger, Christoph; Neubauer, Franz; Yang, Zhao; Liu, Xiaoming

doi:10.1016/j.lithos.2010.11.011

Cited by 289 publications

(189 citation statements)

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“…These facts indicate that their protoliths were formed in the early Neoproterozoic. The Danfeng Group crops out in the southern NQB, and is composed of arc volcanic-sedimentary rocks that underwent greenschist to low amphibolite facies metamorphism and is intruded by the 517-430 Ma gabbroic intrusion [25]. Their youngest concordant detrital zircon age is 827 Ma, suggesting that the Danfeng Group was deposited after 827 Ma [21], most possibly during 827-517 Ma.…”

Section: Geological Settingmentioning

confidence: 99%

“…Several episodes of arc-continental collision might have taken place in the process of early Paleozoic convergence between the NCB and SCB. The Qinling oceanic crust was completely consumed alone the SDSZ in the Devonian [1, 13,25,32,33]. The HP-UHP metamorphism with the peak age of 500 Ma and two-phase retrogressive metamorphism of 450 Ma granulite-and 420 Ma amphibolitefacies, were distinguished in the NQB.…”

Section: Granitic Magmatism In Response To Tectonic Eventsmentioning

confidence: 99%

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Granitic magmatism related to early Paleozoic continental collision in North Qinling

et al. 2013

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Zircon U-Pb dating of early Paleozoic granitoids in North Qinling yields three age peaks of ~500, ~452 and ~420 Ma. They can be temporally correlated with high-pressure to ultrahigh-pressure metamorphism at ca. 500 Ma, retrograde granulite-facies metamorphisms at ca. 450 Ma and amphibolite-facies metamorphism at ca. 420 Ma, respectively. The first episode of granitic magmatism is considered to have resulted from continental collision, whereas the second and third episodes of magmatism are attributed to crustal uplifting. Combined with the regional geological setting and new results from high-pressure and ultrahigh-pressure metamorphic rocks, the ca. 500 Ma magmatism is interpreted as the result of partial melting of sedimentary rocks in accretionary wedge between the south Qinling microcontinent and the north Qinling belt including the southern margin of the North China Craton. The ca. 450 Ma intensive magmatism is ascribed to dehydration melting of deeply subducted continental crust at thickened conditions in response to slab breakoff, and the final magmatism in ca. 420 Ma is interpreted as the product of partial melting during the tectonic transition from contraction to extension.

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Section: Geological Settingmentioning

confidence: 99%

Section: Granitic Magmatism In Response To Tectonic Eventsmentioning

confidence: 99%

Granitic magmatism related to early Paleozoic continental collision in North Qinling

et al. 2013

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“…1a). It is at a key tectonic position, been considered as a composite orogenic belt, formed by the collision of the South China and North China blocks (Mattauer et al, 1985;Sengor, 1985;Zhang, 1985;Ren et al, 1986;Hsu et al, 1987;Zhang et al, 1987Zhang et al, , 1989Enkin et al, 1992;Kröner et al, 1993;Li et al, 1993;Okay and Sengor, 1993;Ames et al, 1996;Zhang et al, 1996a;Hacker et al, 1998;Meng and Zhang, 1999;Faure et al, 2001;Zhang et al, 2001;Ratschbacher et al, 2003Ratschbacher et al, , 2006Dong et al, 2011aDong et al, ,b,c, 2012aBader et al, 2013a,b;Dong et al, 2013;Li et al, 2015;Dong et al, 2016). Qinling orogenic belt has preserved a lot of kinematic evolution records of long-term multiple stages subduction and collision between the South China and North China blocks, as well as tectonic records of overthrust thrusting, strike-slip regulation, extensional collapse, been a good region for studying orogenic tectonic process.…”

Section: Introductionmentioning

confidence: 99%

The geological and geodynamic condition on the formation of the Dabashan thrust nappe structure: Based on FLAC numerical modelling

Zhang¹,

Dong²

2016

Earth sci. res. j.

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The Dabashan thrust nappe structure at the southern margin of the Qinling orogenic belt suffered at least two stages of evolution which are Late Triassic plate subduction collisional orogeny between North China block, Qinling micro-plate and Yangtze block followed by intracontinental orogeny since the Meso-Cenozoic. A prominent topography characteristic within the Dabashan area is a southwestward extrusive arc (Bashan Arc fault) that is one of key factors to understand the geodynamic condition of the Dabashan thrust nappe structure.In this work, two-dimensional plan-view models are constructed to simulate the collisional and intracontinental orogenic movements, and the factors that may control the formation of the Bashan Arc fault are analysed. The modelling results show that the compressive stress produced by the plates collision along both north and south boundaries is the main driving force. The dextral shearing derived from the inconsistent shape on the block margins is the main controller. Rigid tectonic units such as Bikou and Hanan-Micangshan terranes, Foping and Wudang domes, as well as Shennongjia-Huangling anticline also contribute as "anchor" effects. Additionally, the rheology properties of rock material in the Dabashan area affect the shape of the arc.La estructura de la falla de cabalgamiento de las montañas Dabashan en el margen sur del cinturón orogénico de Qinling sufrió por lo menos dos etapas de evolución, la colisión orogénica del Triásico Superior entre el bloque de la China del Norte, la microplaca de Qinling y el bloque Yangtze, y la orogénesis intracontinental desde el Meso-Cenozoico. Una característica topográfica prominente del área de Dabashan es un arco extrusivo (falla Arco de Bashan) hacia el suroeste, que es un factor determinante para entender la condición geodinámica de la falla de cabalgamiento en las montañas Dabashan. En este trabajo se construyeron modelos bidimensionales planos para simular los movimientos de colisión e intracontinental orogénicos y se analizaron los factores que podrían controlar la formación de la falla del Arco de Bashan. Los resultados del modelado muestran que el esfuerzo de compresión producido por las placas de colisión en los límites norte y sur es la principal fuerza impulsora de la falla. La principal controladora es la fuerza de cizallamiento dextral derivada de la forma inconsistente en los margenes del bloque. Las unidades tectónicas rígidas como los terrenos Bikou y HananMicangshan, el domo Foping y Wudang, al igual que el anticlinal Shennongjia-Huangling tienen funciones de ancla. Adicionalmente, las propiedades reológicas del material rocoso en el área Dabashan afectan la forma del arco. Condición geológica y geodinámica para la formación estructural de la falla de cabalgamiento en las montañas Dabashan basada en el modelo numérico del software FLAC B2 Xiaoning Zhang and Yunpeng Dong. ABSTRACT RESUMEN

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“…Considerable progress in the research on the Qinling orogenic belt has been achieved in the recent years [13,14,[16][17][18][19][20][21][22][23][24]. The Qinling-Dabie orogen, lasting about 600 Ma, is a typical "composite orogen" that underwent two collision events during the Devonian and Triassic Periods and an intracontinental orogeny during the Cretaceous [20,21,24,25]. The orogenic activity in the Qinling area during the Late Jurassic to the Early Cretaceous was caused by neither the collision related to plate subduction nor the remote effect of plate tectonics, but by the intracontinental orogen not related to the tectonic dynamic [14].…”

mentioning

confidence: 99%

Uprising period and elevation of the Wenyu granitic pluton in the Xiaoqinling District, Central China

Liu

Zhang

et al. 2013

Chin. Sci. Bull.

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Xiaoqinling District is an important gold-producing area in China. It ranks second to Jiaodong with regard to gold deposits. The uprising period of the Wenyu granitic pluton and the wall-rocks of the deposit, as well as the mineralizing depth and reserved place of gold ore bodies, are significant to ore exploration. Fission-track (FT) analysis of zircons and apatites of granitic rocks from the Wenyu granitic pluton shows that apatite FT (AFT) data modeling indicates a rapid cooling rate of 20°C/Ma from 138 to 120 Ma after emplacement at 138 Ma. Thermal evolution and inversion curves suggest a secondary phase of fast cooling and uprising from 45 to 35 Ma, and 35 Ma, respectively, with a cooling rate of 6.7°C/Ma and a denudation quantity of ~4.3 km. The last cooling phase took place from <4 Ma, with an average cooling rate of ~11.3°C/Ma and a denudation amount of 1.3 km. Total exhumation quantity of 5.6 km and uprising elevation of 7.3 km are similar to the estimated results of fluid inclusions from the Dongtongyu and Wenyu gold deposits. The 39 Ar/ 40 Ar dating of sericite from the fault planes of the Xunmadao-Xiaohe and Taiyao faults demonstrate two uprising activities of the ore-host metamorphic complex. The Huashan and Wenyu granitic plutons intensively occurred during 77 and 45 Ma, respectively. These data sets are valuable for understanding the uplifting process and for preserving gold ore bodies in the Xiaoqinling area, as well as for further studies on tectonic evolutions of the Taihua Complex and the Qinling-Dabie Orogen.

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Palaeozoic tectonics and evolutionary history of the Qinling orogen: Evidence from geochemistry and geochronology of ophiolite and related volcanic rocks

Cited by 289 publications

References 42 publications

Granitic magmatism related to early Paleozoic continental collision in North Qinling

Granitic magmatism related to early Paleozoic continental collision in North Qinling

The geological and geodynamic condition on the formation of the Dabashan thrust nappe structure: Based on FLAC numerical modelling

Uprising period and elevation of the Wenyu granitic pluton in the Xiaoqinling District, Central China

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