Tectonic evolution of the Dongshan terrane, Fujian Province, China

Lu, Haijian; Jia, Dong; Wang, Z.; Guo, Lang; Shi, Yu; Zhang, Q.

doi:10.1016/0895-9811(94)90020-5

Cited by 20 publications

(14 citation statements)

References 8 publications

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“…Zhou et al 2006;He et al 2010), whereas Cretaceous rocks occur along the coasts of Guangdong, Fujian, and Zhejiang provinces (e.g. Lu et al 1994;Laplerre et al 1997;Chen et al 2004Chen et al , 2008aZhou et al 2006;Cui et al 2013) (Figure 1). Generally the prolonged magmatic episode comprises the Indosinian (Late Triassic,, the early Yanshanian (Middle to Late Jurassic,, and the late Yanshanian periods (Early Cretaceous, 140-66 Ma) ( Figure 1).…”

Section: Regional Geologymentioning

confidence: 99%

Geochemical and geochronological constraints on Late Jurassic volcanic rocks at Tuen Mun, Hong Kong, with implications for the Palaeo-Pacific subduction

Zhou

Lai³

et al. 2014

International Geology Review

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Widespread Mesozoic igneous rocks in Hong Kong form part of the giant Mesozoic igneous province in Southeastern China. The Tuen Mun Formation in the Northwestern New Territories is the oldest volcanic unit known in Hong Kong. This formation contains a lower unit composed of dominantly volcanic breccia, minor dacite, rhyolite, and tuff, and an upper unit of basaltic andesitic to andesitic lava. The volcanic rocks from the lower unit contain zircon grains with a mean U-Pb age of 163.4 ± 0.9 Ma, synchronous with the adjacent Tsuen Wan Volcanic Group in the region. Good inter-correlations between different elements in the Harker diagrams indicate that the volcanic rocks with high SiO 2 (e.g. >65 wt.%) are essentially physical mixtures of intermediate magmas and various xenoliths of country rocks, characterizing the palaeo-volcanic plug facies. Preservation of large amounts of xenoliths of sandstone and marble in the volcanic rocks, which is revealed both in field and under microscopic observation, further supports this hypothesis. The original andesitic magma, represented by the intermediate volcanic rocks with SiO 2 <65 wt.%, exhibit enrichments of LILEs and LREEs compared with N-MORB, but have negative Nb-Ta-Ti anomalies in the primitive-mantle normalized diagram, similar to those derived from metasomatized mantle wedge in an arc environment. Large ranges of SiO 2 , MgO, and CaO contents, and negative Eu and Ce anomalies are consistent with significant fractional crystallization of likely olivine/pyroxene and plagioclase. We propose that during the Late Jurassic subduction of the Palaeo-Pacific Plate underneath the coastal continental arc in Southeast China generated prolonged and cyclic volcanism in the northern part of Hong Kong.

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Section: Regional Geologymentioning

confidence: 99%

Geochemical and geochronological constraints on Late Jurassic volcanic rocks at Tuen Mun, Hong Kong, with implications for the Palaeo-Pacific subduction

Zhou

Lai³

et al. 2014

International Geology Review

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“…High greenschist to amphibolite grade metamorphism occurred during Late Triassic-Middle Jurassic terrane collision in the Fujian Province of southeast China (FP: Fig. 1) (Lu et al 1994); similar aged collision on the Mianlue suture zone, part of the collision zone between the North China and South China blocks, in central China is associated with major gold mineralization (NS: Fig. 1) (Vielreicher et al 2003).…”

Section: Eurasiamentioning

confidence: 99%

“…In the Fujian Province of southern China (FP, Fig. 2), gabbroic and ultramafic rocks of a dismembered ophiolite suite (Wang & Lu 1998) were emplaced on Paleozoic basement rocks by ocean-vergent thrusting coeval with ~115 Ma gabbro and granitoid plutons (Wang 2002), and compressional shear joints dated at 107 Ma (Lu et al 1994). Fission track dating also suggests that uplift had ceased by ~110 Ma .…”

Section: East and Southeast Asiamentioning

confidence: 99%

Episodicity of Mesozoic terrane accretion along the Pacific margin of Gondwana: implications for superplume-plate interactions

Vaughan

Livermore

2005

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A review of evidence for deformation and terrane accretion on the Late Triassic-Early Jurassic margins of Pangaea and the mid-Cretaceous margins of the palaeo-Pacific ocean shows that deformation was global and synchronous with probable superplume events. Late Triassic-Early Jurassic deformation appears to be concentrated in the period 202–197 Ma and was coeval with eruption of the Central Atlantic Magmatic Province, onset of Pangaea break-up, a period of extended normal magnetic polarity and a major mass extinction event, all possible expressions of a superplume event. Mid-Cretaceous deformation occurred in two brief periods, the first from approximately 116 Ma to 110 Ma in the west palaeo-Pacific and the second from roughly 105 Ma to 99 Ma in the east palaeo-Pacific, with both events possibly represented in northeast Siberia. This deformation was coeval with eruption of major oceanic plateaux, core-complex formation and rifting of New Zealand from Gondwana, the Cretaceous normal polarity epoch, and a major radiation of flowering plants and several animal groups, all linked with the mid-Cretaceous superplume event. A simple unifying mechanism is presented suggesting that large continental or oceanic plates, when impacted by a superplume, tend to break-up/reorganize, associated with gravitational spreading away from a broad, thermally generated topographic high and with a resulting short-lived pulse of plate-marginal deformation and terrane accretion.

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“…The main units are lower Paleozoic regional metamorphic rocks and Mesozoic granites, volcanic rocks, and mafic-ultramafic rocks. The metamorphic rocks are biotite gneiss, amphibole schist, sillimanite schist, and quartz schist; Rb-Sr isochron ages, mainly obtained from the orthogneisses and some metasedimentary rocks, mostly lie in the range 165-178 Ma (e.g., Jahn et al, 1976;Lu et al, 1994). The mafic-ultramafic rocks are exclusively distributed along the Changle-Nanao fracture zone, and their ages are 95-115 Ma (Li et al, 1995;Dong et al, 1997;Wang, 2002).…”

Section: Geological Settingmentioning

confidence: 99%

Geochemistry, Petrogenesis, and Tectonic Significance of Mesozoic Mafic Dikes, Fujian Province, Southeastern China

Zhao

Liu

2004

International Geology Review

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Major-and trace-element data for Mesozoic mafic dikes from Fujian Province, Southeast China, provide insights into the nature of their mantle source and evolution of the lithospheric mantle beneath the Cathaysian block. These dikes are alkali to subalkali in composition, and are characterized by high Al 2 O 3 (14.0-20.4 wt%) and moderate CaO (4.09-12.7 wt%) compared to Cenozoic basalts in the same region. In primitive mantle-normalized plots, they are enriched in LREE and LILE, and depleted in HFSE (Nb and Ta), with positive Pb and negative Ti anomalies. They are divided into two types, based on their REE contents: type 1 had low total REE (53.8-145.5 ppm) with relatively flat chondrite-normalized patterns [(La/Yb) n =1.68-4.65], whereas type 2 has much higher total REE (63-247 ppm) with LREE enrichment [(La/Yb) n = 4.63-19]. Zr/Y ratios show a good correlation with Y in the type 1 dikes, but not in the type 2 varieties. Rocks in both groups experienced modest crustal contamination. All have slightly higher Pb isotopic ratios than the associated Cenozoic basalts, suggesting that the Mesozoic dikes were derived from a mantle source that had been modified by subducted materials (fluid + sediment). Type 1 dikes are believed to have been derived from garnet-spinel lherzolite, whereas type 2 dikes were probably derived from spinelor spinel-plagioclase lherzolite. Both mantle sources were compositionally heterogeneous and they experienced different degrees of depletion. Asthenospheric upwelling provides a possible mechanism for lithosphere thinning and extension, leading to emplacement of the dikes.

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Tectonic evolution of the Dongshan terrane, Fujian Province, China

Cited by 20 publications

References 8 publications

Geochemical and geochronological constraints on Late Jurassic volcanic rocks at Tuen Mun, Hong Kong, with implications for the Palaeo-Pacific subduction

Geochemical and geochronological constraints on Late Jurassic volcanic rocks at Tuen Mun, Hong Kong, with implications for the Palaeo-Pacific subduction

Episodicity of Mesozoic terrane accretion along the Pacific margin of Gondwana: implications for superplume-plate interactions

Geochemistry, Petrogenesis, and Tectonic Significance of Mesozoic Mafic Dikes, Fujian Province, Southeastern China

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