Petrogenesis of mafic and felsic rocks from the Comei large igneous province, South Tibet: Implications for the initial activity of the Kerguelen plume

Zhou, Qing; Liu, Zheng; Lai, Yang; Wang, Guochang; Zhen-wen, Liao; Li, Yingxu; Wu, Jianyang; Wang, Shengwei; Qing, Chengshi

doi:10.1130/b31653.1

Cited by 30 publications

(25 citation statements)

References 56 publications

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“…A distinctive feature is emplacement in extensional tectonic environments, such as continental rift, back-arc, post-orogenic and within-plate settings (e.g. Eby, 1990;Sun et al 2017;Zhou et al 2018), commonly postdating calc-alkaline magmatism. In terms of geochemical signatures, A-type granitoids have been divided into two subtypes: A 1 and A 2 (Eby, 1992).…”

Section: C Tectonic Settingmentioning

confidence: 99%

“…Similar to A-type granite, there are also A-type eruptive lavas, which are common and closely associated with the equivalent intrusion (e.g. Clemens et al 1986;Turner et al 1992;Frost & Frost, 1997;Liu et al 2015;Zhou et al 2018). In contrast to huge Sand I-type batholiths, A-type rocks commonly form small subvolcanic intrusions or occur as eruptive lavas (Clemens et al 1986;Bonin, 2007;Shellnutt & Jahn, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to huge Sand I-type batholiths, A-type rocks commonly form small subvolcanic intrusions or occur as eruptive lavas (Clemens et al 1986;Bonin, 2007;Shellnutt & Jahn, 2010). A typical extrusive rock association that includes A-type rocks is the bimodal suite of rhyolite and basalt (Clemens et al 1986;Liu et al 2015;Zhou et al 2018). Although A-type rocks are insignificant in volume, they have received much attention because of their tectonic implications and economic potential for Be, Li, Mo, Sn, W, Nb, Ta and rare earth element (REE) mineralization.…”

Section: Introductionmentioning

confidence: 99%

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Petrogenesis and tectonic implications of Late Mesoproterozoic A1- and A2-type felsic lavas from the Huili Group, southwestern Yangtze Block

Wang

Yin

et al. 2019

Geol. Mag.

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This paper presents new LA-ICP-MS zircon U–Pb chronology, whole-rock geochemical and zircon Hf isotopic data for the felsic lavas of the Huili Group from the southwestern Yangtze Block. LA-ICP-MS zircon U–Pb dating shows that these rocks were emplaced in Late Mesoproterozoic time (∼1028 to 1019 Ma). Relative to typical I-type and S-type granitoids, all the samples are characterized by low Sr and Eu, and high high-field-strength element contents, highTFeO/MgO, enriched rare earth element compositions and negative Eu anomalies, indicating that they share the geochemical signatures of A-type granitoid. They can be further divided into two groups: Group I and Group II. Group I are A1-type felsic rocks and were produced by fractional crystallization of alkaline basaltic magmas. The Group II felsic lavas belong to the A2-type and were derived by partial melting of a crustal source with mixing of mantle-derived magmas. Both Group I and Group II felsic lavas may erupt in a continental back-arc setting. The coexistence of A1- and A2-type rocks in the southwestern Yangtze Block suggests that they can occur in the same tectonic setting.

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Section: C Tectonic Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Petrogenesis and tectonic implications of Late Mesoproterozoic A1- and A2-type felsic lavas from the Huili Group, southwestern Yangtze Block

Wang

Yin

et al. 2019

Geol. Mag.

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“…Recently, extensive Early Cretaceous mafic rocks around the Comei area in southeastern Tibet have been identified as part of the Comei–Bunbury large igneous province, which may be produced by the Kerguelen mantle plume (Figure 1; Zhu et al, 2007, 2009; Zhu, Mo, Zhao, Niu, & Chung, 2008). Since then, more and more Early Cretaceous mafic rocks have been reported around the Comei region and have been suggested to be part of the Comei–Bunbury large igneous province (Liu et al, 2015; Zhou et al, 2018). Most of these Early Cretaceous rocks have zircon U–Pb ages of ca.…”

Section: Introductionmentioning

confidence: 99%

“…132 Ma with a few ranging from ca. 145 to 139 Ma (Zhou et al, 2018; Zhu et al, 2008, 2009). These rocks have ocean island basalt (OIB)‐like or N‐MORB‐like trace element patterns and were likely produced by interaction between plume and lithospheric mantle, or between anhydrous lithospheric mantle and rising depleted asthenospheric mantle (Zhou et al, 2018; Zhu, Mo, Pan, et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Isotopic (Sr, Nd, and Os) compositions of Zhaxikang diabases, southern Tibet: Records of mantle‐plume activity and implications for Zhaxikang Sb–Pb–Zn–Ag mineralization

Sun

Mou

et al. 2020

Geological Journal

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Zn-Ag deposit in southeastern Tibet provide an opportunity to reveal the tempo-spatial distribution of the recently identified Comei large igneous province and understand the association with Zhaxikang mineralization. Here we present whole-rock geochemical and Sr-Nd-Re-Os isotopic data on the Zhaxikang diabases. The Zhaxikang diabases have a Re-Os isochron age of 136.1 ± 3.1 Ma. These rocks are characterized by high TiO 2 content (3.0-4.2 wt%) and have alkaline ocean island basalt-like trace element patterns with initial 87 Sr/ 86 Sr ratios of 0.7060-0.7069, ε Nd (t) values of 1.3-3.3, and 187 Os/ 188 Os(t) ratios of 0.12-0.13. The Zhaxikang diabases are part of the Comei large igneous province and were derived from partial melting of enriched garnet-bearing mantle source and related to interaction of plume melts with subcontinental lithospheric mantle. Our new data provided additional evidence that Zhaxikang Pb-Zn(Ag)-bearing Mn-Fe carbonate veins were not produced by a sedimentary exhalative event in Triassic-Jurassic rift environment.

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Early Cretaceous Greater Kerguelen Large Igneous Province and its plumbing systems: A contemplation on concurrent magmatic records of the eastern Indian Shield and adjoining regions

Srivastava

2021

Geological Journal

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A detailed contemplation is attempted to comprehend the likely connection of a large number of Early Cretaceous mafic, felsic, alkaline (kimberlite, lamproites, ultramafic lamprophyre, etc.), and carbonatite magmatic records of the eastern and northeastern region of the Indian Shield and adjoining regions. All these Early Cretaceous magmatic records occupied a large area, covering adjoining regions of south-eastern Tibet, eastern and north-eastern India, western Australia, Eastern Indian Ocean, southern Kerguelen Plateau, and north-eastern Antarctica, are supposed to be part of the Greater Kerguelen Large Igneous Province (LIP) and likely to be related to the break-up of East Gondwana. Available age results, chiefly ranging from ca. 145 to 100 Ma, support a genetic connection with the Kerguelen mantle plume. However, there are other lines of evidences, particularly radiogenic isotope data that preclude direct involvement of any mantle plume component; likely to be derived from decompression melting related to passive rifting. Two major magmatic phases, ca. 145-130 Ma and ca. 124-100 Ma, have been distinctly identified, which could be related to distinct rifting events. Break-up of East Gondwana had happened at ca. 137 Ma with separation of Western Australia from Greater India. Later, ca. 124-122 Ma, separation of Antarctica from Eastern India occurred. The later magmatic phases (after ca. 120 Ma) are likely to have an indirect connection with the Greater Kerguelen LIP probably with the mantle plume providing extra heat for melting.

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Petrogenesis of mafic and felsic rocks from the Comei large igneous province, South Tibet: Implications for the initial activity of the Kerguelen plume

Cited by 30 publications

References 56 publications

Petrogenesis and tectonic implications of Late Mesoproterozoic A1- and A2-type felsic lavas from the Huili Group, southwestern Yangtze Block

Petrogenesis and tectonic implications of Late Mesoproterozoic A1- and A2-type felsic lavas from the Huili Group, southwestern Yangtze Block

Isotopic (Sr, Nd, and Os) compositions of Zhaxikang diabases, southern Tibet: Records of mantle‐plume activity and implications for Zhaxikang Sb–Pb–Zn–Ag mineralization

Early Cretaceous Greater Kerguelen Large Igneous Province and its plumbing systems: A contemplation on concurrent magmatic records of the eastern Indian Shield and adjoining regions

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