U–Pb, Hf and O isotope evidence for two episodes of fluid-assisted zircon growth in marble-hosted eclogites from the Dabie orogen

Wu, Yuan–Bao; Zheng, Yong‐Fei; Zhao, Zi‐Fu; Gong, Bing; Liu, Xiaoming; Wu, Fu‐Yuan

doi:10.1016/j.gca.2006.05.011

Cited by 276 publications

(149 citation statements)

References 94 publications

(193 reference statements)

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“…Detailed petrologic, geochemical and geochronological information of the Shuanghe eclogites is available in previous work (e.g., Cong et al 1995;Zheng et al 1998;Li et al 2000;Fu et al 2001;Wu et al 2006). The peak metamorphic conditions have been estimated to be T = 700 ± 50 °C and P ≥ 2.7-2.8 GPa (Cong et al 1995).…”

Section: Shuanghementioning

confidence: 99%

Empirical calibration of the clinopyroxene–garnet magnesium isotope geothermometer and implications

Teng

Xiao

et al. 2016

Contrib Mineral Petrol

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between clinopyroxene and garnet. The equilibrium Δ 26 Mg clinopyroxene-garnet and corresponding temperature data obtained in this study, together with those available so far in literatures for natural eclogites, are used to calibrate the clinopyroxene-garnet Mg isotope thermometer. This yields a function of Δ 26 Mg clinopyroxene-garnet = (0.99 ± 0.06) × 10 6 /T 2 , where T is temperature in Kelvin. The refined function not only provides the best empirically calibrated clinopyroxene-garnet Mg isotope thermometer for precise constraints of temperatures of clinopyroxene-and garnet-bearing rocks, but also has potential applications in high-temperature Mg isotope geochemistry.

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Section: Shuanghementioning

confidence: 99%

Empirical calibration of the clinopyroxene–garnet magnesium isotope geothermometer and implications

Teng

Xiao

et al. 2016

Contrib Mineral Petrol

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“…A tectonothermal event at 1.9-1.8 Ga has been identified in the deep-seated rocks from many areas of east China, including the Raobazhai peridotites (Jin et al 2004;Zheng et al 2009b), the Shuanghe (Ayers et al 2002;Zheng et al 2003b;Wu et al 2006) and Wumiao (Maruyama et al 1998;Wu et al 2006) gneisses in the Dabie belt, and gneisses in the Rongcheng-Wendeng area (Tang et al 2008) of the Sulu belt. The tectonothermal event is also widely recorded in metasedimentary rocks, HP granulites, HP amphibolites, charnockites, S-type granites and older (Zhang et al , 2005c(Zhang et al , 2009Zheng et al 2005a); b CCSD-pp1 ?…”

Section: Proterozoic Metasomatic Modificationmentioning

confidence: 99%

Linking continental deep subduction with destruction of a cratonic margin: strongly reworked North China SCLM intruded in the Triassic Sulu UHP belt

Zheng

Tang

Xiong

et al. 2014

Contrib Mineral Petrol

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The collision between the North and South China cratons in Middle Triassic time (240-225 Ma) created the world's largest belt of ultrahigh-pressure (UHP) metamorphism. U-Pb ages, Hf isotope systematics and trace element compositions of zircons from the Xugou, Yangkou and Hujialing peridotites in the Sulu UHP terrane mainly record a *470 Ma tectonothermal event, coeval with the Early Paleozoic kimberlite eruptions within the North China craton. This event is interpreted as the result of metasomatism by fluids/melts derived from multiple sources including a subducting continental slab. The peridotites also contain zircons with ages of *3.

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“…Two groups of zircon U-Pb ages of 245-240 Ma and 225-220 Ma are common for UHP metamorphic rocks from the central and southern Dabie orogen [46][47][48][49]. The former was generally interpreted as the age of metamorphic dehydration event occurring in the transition from HP to UHP conditions during continental subduction, and the latter as the age of metamorphic dehydration event in the transition from UHP to HP conditions during the exhumation of deeply subducted continental crust [42,50].…”

Section: Interpretation Of Diachroneity Along the Direction Of The Ormentioning

confidence: 99%

Diachroneity of continental subduction and exhumation: Constraints from the Permian-Triassic HP metamorphic terrane in the Tongbai orogen, central China

Liu

Jahn

2013

Chin. Sci. Bull.

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High-pressure (HP) metamorphic terrane in the Tongbai orogen comprises two HP slices (I and II) and a tectonic mélange zone in the northeast and a blueschist-greenschist zone in the southwest. HP slice I is represented by the northern and southern eclogite zones on the two sides of the Tongbaishan antiform. HP slice II is represented by retrograded eclogite-bearing metamorphic enclaves in Cretaceous gneissic granites in the Tongbai Complex. U-Pb, Lu-Hf, Rb-Sr and 40 Ar/ 39 Ar multichronometric data indicate that the peak metamorphism of HP slice I took place at ~255 Ma, whereas the metamorphic ages of HP slice II are as young as 232-220 Ma. By contrast, the tectonic mélange zone near the suture was metamorphosed at ~256 Ma. Such a diachroneity of different slices across the direction of the orogen in the Hong'an-Dabie-Sulu HP/UHP terrane is ubiquitous, and it can be interpreted by a syn-subduction detachment/exhumation model. Furthermore, the metamorphic age of HP slice I in the Tongbai orogen is older than that of the equivalent HP slice in the Hong'an orogen by ~15 Ma, suggesting that the diachroneity may have also existed along the direction of the orogen. A seesaw-type subduction/exhumation model is proposed to explain this age disparity and the subduction of the South China Block becomimg shallower towards the west. The processes and mechanism of exhumation of ultrahighpressure (UHP) metamorphic rocks to the Earth's surface from mantle depths exceeding ~100 km remain as one of the most difficult problems in earth science. It appears that a simple mechanism involving buoyancy and erosion is unable to explain the rapid exhumation required for the preservation of coesite. Much attention should be paid to the deepseated tectonic processes of continental slab. Based on the nature of structural contacts and existence of metamorphic gaps between different HP/UHP metamorphic units in the Dora Maira Massif of the western Alps, Chopin [1] andSchreyer [2] inferred that the end of the downgoing slab might have successively broken to several slices during its subduction along very low geothermal gradients (~7C/km). The earlier subducted slices could be uplifted as the overlying hanging-walls during the subduction of the later underlying slices. Liu and Hu [3] have formerly noticed the similarity of HP/UHP terrane from the Dabie Mountains and the Dora Maira Massif. Lately Liu et al. [4,5] distinguished UHP, HP and low-temperature (LT) HP slices and a tectonic mélange zone with the time difference of exhumation of ~30 Ma in the Hong'an orogen on the basis of thermobaric structure and geochronological data, and proposed a diachronous subduction/exhumation model for the formation of

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U–Pb, Hf and O isotope evidence for two episodes of fluid-assisted zircon growth in marble-hosted eclogites from the Dabie orogen

Cited by 276 publications

References 94 publications

Empirical calibration of the clinopyroxene–garnet magnesium isotope geothermometer and implications

Empirical calibration of the clinopyroxene–garnet magnesium isotope geothermometer and implications

Linking continental deep subduction with destruction of a cratonic margin: strongly reworked North China SCLM intruded in the Triassic Sulu UHP belt

Diachroneity of continental subduction and exhumation: Constraints from the Permian-Triassic HP metamorphic terrane in the Tongbai orogen, central China

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