An early extensional event of the South China Block during the Late Mesozoic recorded by the emplacement of the Late Jurassic syntectonic Hengshan Composite Granitic Massif (Hunan, SE China)

Wei, Wei; Chen, Yan; Faure, Michel; Martelet, Guillaume; Lin, Wei; Wang, Qingchen; Yan, Quanren; Hou, Quanlin

doi:10.1016/j.tecto.2016.01.028

Cited by 38 publications

(34 citation statements)

References 84 publications

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“…The world‐class Jurassic magmatism and associated ore formation in South China took place from 170 to 140 Ma (Li, Wei, et al, ). Continent‐scale extension was the major tectonic event in South China during the Jurassic, characterized by faulting, half‐grabens, and bimodal volcanic rocks distributed over a huge area (Wei et al, ). Jurassic magmatic intrusions, widely distributed in South Hunan, are characterized by multiple stages of activity resulting in a significant number of large and giant metal deposits (Peng et al, ; Yao et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…China during the Jurassic, characterized by faulting, half-grabens, and bimodal volcanic rocks distributed over a huge area (Wei et al, 2016). Jurassic magmatic intrusions, widely distributed in South Hunan, are characterized by multiple stages of activity resulting in a significant number of large and giant metal deposits (Peng et al, 2006;Yao et al, 2007).…”

Section: Continent-scale Extension Was the Major Tectonic Event In Southmentioning

confidence: 99%

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Genesis of the Huangshaping W–Mo–Cu–Pb–Zn deposit, South China: Role of magmatic water, metasomatized fluids, and basinal brines during intra‐continental extension

Palinkaš

Evans

et al. 2019

Geological Journal

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The Huangshaping world‐class W–Mo–Cu–Pb–Zn deposit formed during Jurassic intra‐continental extension in the central Nanling region (South Hunan), South China. In order to assess the role of fluids in ore genesis and the origin of polymetallic mineralization, three types of mineralized porphyries (quartz porphyry, granophyre, and granite porphyry) were studied. The multi‐method approach included whole‐rock Sr–Nd isotopic geochemistry and determination of the trace element content and gaseous and aqueous composition of ore minerals from the three stages of intrusion and ore emplacement. Geochemical results show that the Sr–Nd isotopes in these altered porphyries were strongly affected by fluid metasomatism. The 87Sr/86Sr and 147Sm/144Nd ratios for the quartz porphyry and granophyre range from 0.72894 to 0.83093 and 0.1524 to 0.2080, respectively, whereas higher and considerably more variable ratios were determined for the granite porphyry (0.90396 to 1.51943 and 0.2391 to 0.2914). These observations imply that granite porphyry‐associated W–Mo mineralization underwent more intensive fluid–rock interaction. The relatively low REE concentrations and high abundances of CH4 and H2 in the Cu ores associated with the quartz porphyry unambiguously suggest a deep‐sourced magmatic fluid for the Cu mineralization. The high REE concentrations, pronounced negative Eu anomalies, M‐type tetrad effects, and high CO2, H2O, and Ca2+ contents of the W–Mo ores associated with the granite porphyry imply that the W–Mo polymetallic mineralization was formed in a relatively oxidizing, high‐temperature environment with strong metasomatism. In contrast, the slightly negative Eu anomalies, W‐type tetrad effects, low CH4, and high F− and Cl− concentrations of the Pb–Zn ores indicate involvement of a sediment‐derived basinal brine and reducing mineralization conditions. Collectively, a three‐stage genetic model is proposed for the Huangshaping polymetallic deposit. Corresponding to initiation, development, and cessation of Jurassic intra‐continental extension, magmatic water, metasomatized fluids, and basinal brines played key sequential roles in Cu, W–Mo, and Pb–Zn mineralization.

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Section: Discussionmentioning

confidence: 99%

Section: Continent-scale Extension Was the Major Tectonic Event In Southmentioning

confidence: 99%

Genesis of the Huangshaping W–Mo–Cu–Pb–Zn deposit, South China: Role of magmatic water, metasomatized fluids, and basinal brines during intra‐continental extension

Palinkaš

Evans

et al. 2019

Geological Journal

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“…Such a combined approach has already been successfully applied to decipher the pluton emplacement modes, such as in the European Variscan belt (e.g., Améglio, Vigneresse, & Bouchez, 1997;Aranguren et al, 2003;Gébelin et al, 2006;Joly et al, 2009;Talbot et al, 2005;Turrillot et al, 2011), as well as in eastern China (Liang et al, 2015;Lin, Charles, et al, 2013;Wei et al, 2016). Such a combined approach has already been successfully applied to decipher the pluton emplacement modes, such as in the European Variscan belt (e.g., Améglio, Vigneresse, & Bouchez, 1997;Aranguren et al, 2003;Gébelin et al, 2006;Joly et al, 2009;Talbot et al, 2005;Turrillot et al, 2011), as well as in eastern China (Liang et al, 2015;Lin, Charles, et al, 2013;Wei et al, 2016).…”

Section: Emplacement Modes and Their Bearings On The Regional Tectonicsmentioning

confidence: 99%

“…Li, Qiu, & Yang, 2014;Zhou & Li, 2000;Zhou et al, 2006). In particular, determining the fabric patterns and shape at depth of plutons is crucial to address their emplacement modes, but only a few such work have been carried out in south China (Feng et al, 2012;Wei et al, 2016;Zhang et al, 2008). The lack of structural constraints makes difficult the assessment of the tectonic regimes (compression, extension, or strike slip) that are associated with the magmatism in the overriding continental plate.…”

Section: Introductionmentioning

confidence: 99%

“…Pluton emplacement processes contain significant information on the concomitant regional stress fields, since magma ascent and final emplacement are usually controlled by both internal dynamics and external tectonism (Bouchez, Hutton, & Stephens, 1997;Brown, 2013;Castro, 1987; Journal of Geophysical Research: Solid Earth 10.1002/2017JB014598 Hutton, 1988;Paterson et al, 1998). In particular, determining the fabric patterns and shape at depth of plutons is crucial to address their emplacement modes, but only a few such work have been carried out in south China (Feng et al, 2012;Wei et al, 2016;Zhang et al, 2008). The Dayunshan-Mufushan batholith that intruded into the Xuefengshan-Jiuling belt in the central SCB comprises Late Jurassic to Early Cretaceous granitic intrusions.…”

Section: Introductionmentioning

confidence: 99%

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Multiple Emplacement and Exhumation History of the Late Mesozoic Dayunshan‐Mufushan Batholith in Southeast China and Its Tectonic Significance: 2. Magnetic Fabrics and Gravity Survey

Chen

et al. 2018

JGR Solid Earth

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The Late Mesozoic magmatic province is a prominent feature of the South China Block (SCB). However, the tectonic regimes associated with the magmatism are still elusive. A combined anisotropy of magnetic susceptibility and gravity study has been carried out to determine the fabric patterns and shape at depth of the Dayunshan‐Mufushan composite batholith in the north‐central SCB. This is a companion paper to Part 1 that presented the structural and geochronological data of this batholith. The magnetic fabrics in the batholith interior predominantly reflect magma flow structures. Two distinct patterns of the magnetic lineations are defined, around NNE‐SSW and WNW‐ESE trends for the early‐stage and late‐stage intrusions of the batholith, respectively. The gravity survey reveals that the early‐stage intrusion has a main feeder zone located below its northern part, while several linear feeder zones trending NNE‐SSW are inferred for the late‐stage intrusion. Integrating all results, a two‐stage construction of the batholith with distinct tectonic regimes has been established. It is concluded that the early‐stage intrusion experienced a southward magma transport during its emplacement, partially assisted by far‐field compression from the north at ca. 150 Ma. Conversely, the emplacement and exhumation of the late‐stage intrusion was accommodated by a NW‐SE crustal stretching involving a lateral magma expansion above the multiple feeder zones (likely corresponding to extensional fractures) and ductile shearing during 132–95 Ma localized mainly along the Dayunshan detachment fault. Finally, we discuss the geodynamic linkage between the paleo‐Pacific subduction and the Late Mesozoic tectonomagmatism in the SCB.

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Multiple Emplacement and Exhumation History of the Late Mesozoic Dayunshan–Mufushan Batholith in Southeast China and Its Tectonic Significance: 1. Structural Analysis and Geochronological Constraints

Faure

Lin

et al. 2018

JGR Solid Earth

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The South China Block (SCB) experienced a polyphase reworking by the Phanerozoic tectonothermal events. To better understand its Late Mesozoic tectonics, an integrated multidisciplinary investigation has been conducted on the Dayunshan–Mufushan composite batholith in the north‐central SCB. This batholith consists of two major intrusions that recorded distinct emplacement features. According to our structural analysis, two deformation events in relation to batholith emplacement and subsequent exhumation are identified. The early one (D1) was observed mostly at the southern border of the batholith, characterized by a top‐to‐the‐SW ductile shearing in the early‐stage intrusion and along its contact zone. This deformation, chiefly associated with the pluton emplacement at ca. 150 Ma, was probably assisted by farfield compression from the northern Yangtze foreland belt. The second but main event (D2) involved two phases: (1) ductile shearing (D2a) prominently expressed along the Dayunshan detachment fault at the western border of the batholith where the syntectonic late‐stage intrusion and minor metasedimentary basement in the footwall suffered mylonitization with top‐to‐the‐NW kinematics; and (2) subsequent brittle faulting (D2b) further exhumed the entire batholith that behaved as rift shoulder with half‐graben basins developed on its both sides. Geochronological constraints show that the crustal ductile extension occurred during 132–95 Ma. Such a Cretaceous NW–SE extensional tectonic regime, as indicated by the D2 event, has been recognized in a vast area of East Asia. This tectonism was responsible not only for the destruction of the North China craton but also for the formation of the so‐called “southeast China basin and range tectonics.”

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An early extensional event of the South China Block during the Late Mesozoic recorded by the emplacement of the Late Jurassic syntectonic Hengshan Composite Granitic Massif (Hunan, SE China)

Cited by 38 publications

References 84 publications

Genesis of the Huangshaping W–Mo–Cu–Pb–Zn deposit, South China: Role of magmatic water, metasomatized fluids, and basinal brines during intra‐continental extension

Genesis of the Huangshaping W–Mo–Cu–Pb–Zn deposit, South China: Role of magmatic water, metasomatized fluids, and basinal brines during intra‐continental extension

Multiple Emplacement and Exhumation History of the Late Mesozoic Dayunshan‐Mufushan Batholith in Southeast China and Its Tectonic Significance: 2. Magnetic Fabrics and Gravity Survey

Multiple Emplacement and Exhumation History of the Late Mesozoic Dayunshan–Mufushan Batholith in Southeast China and Its Tectonic Significance: 1. Structural Analysis and Geochronological Constraints

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