Petrogenesis and metallogenic potential of the early devonian Yugusayi mafic-ultramafic complex in Qimantagh, East Kunlun orogeic belt

Hu, Chaobin; Li, Meng; Chen, Feng; Zha, Xianfeng; Gao, Xiaofeng; Meng, Jianping

doi:10.1080/00206814.2021.1878474

Cited by 4 publications

(1 citation statement)

References 57 publications

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“…[106]), Yugusayi hornblende gabbro (U-Pb age 405 Ma, ref. [107]), and Lalingzahuo A2-type granite (U-Pb age 396 ± 2 Ma, ref. [108]).…”

Section: The Most Distant North Branch Of the East Paleo-tethys Ocean...mentioning

confidence: 99%

Petrogenesis and Tectonic Setting of the Baluogenguole Mafic Dykes, Zongwulong Belt: Implications for Evolution of the Northern East Paleo-Tethys Ocean

Chen,

Pan,

Zhao

et al. 2024

Minerals

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The late Paleozoic tectonic setting of the Zongwulong Belt (ZWLB), a significant unit located in the northern Qaidam margin, Qinghai province, remains uncertain. Diabase dykes in the western part of the Zongwulong Belt offer insights into this issue. Field investigations reveal that the dips of the dykes are almost vertical, and they have sharp boundaries with the host rocks. These dykes consist of plagioclase, clinopyroxene, and opaque minerals exhibiting a characteristic porphyritic texture and massive structure. Zircon U-Pb dating of the dykes yields a weighted 206Pb/238U age of 289 ± 1 Ma. The dykes exhibit relatively high concentrations of TFeO, K2O + Na2O, and TiO2, while the SiO2 and MgO concentrations are relatively low. They display relative light-over-heavy REE enrichment, and lack negative Nb-Ta and Eu anomalies. The dykes underwent negligible crustal contamination, and experienced extensive fractional crystallization of olivine, clinopyroxene, and Fe-Ti oxides. Originating from the spinel–garnet transition zone at depths of approximately 75 km, the dykes result from garnet facies low-degree melting (5%–10%) in a continental rift setting. Combining these findings with regional geological data, we propose that the ZWLB likely experienced a continental rift in the west and exhibited a narrow oceanic environment in the east in the late Paleozoic period, potentially representing the most distant north branch of the East Paleo-Tethys Ocean.

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“…[106]), Yugusayi hornblende gabbro (U-Pb age 405 Ma, ref. [107]), and Lalingzahuo A2-type granite (U-Pb age 396 ± 2 Ma, ref. [108]).…”

Section: The Most Distant North Branch Of the East Paleo-tethys Ocean...mentioning

confidence: 99%

Petrogenesis and Tectonic Setting of the Baluogenguole Mafic Dykes, Zongwulong Belt: Implications for Evolution of the Northern East Paleo-Tethys Ocean

Chen,

Pan,

Zhao

et al. 2024

Minerals

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Structures and chronology of the Yabrai shear zone in the Alxa, NW China: Constraints on the late Paleozoic shear system in central segment of the Central Asian Orogenic Belt

Hong-yan

Zhang

et al. 2022

Journal of Structural Geology

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Early palaeozoic arc-continent collision in East Kunlun, northern Tibet: evidence from the minerology, geochemistry, and geochronology of the Adatan garnet amphibolites

Zha

Dong

et al. 2022

International Geology Review

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Petrogenesis and metallogenic potential of the early devonian Yugusayi mafic-ultramafic complex in Qimantagh, East Kunlun orogeic belt

Cited by 4 publications

References 57 publications

Petrogenesis and Tectonic Setting of the Baluogenguole Mafic Dykes, Zongwulong Belt: Implications for Evolution of the Northern East Paleo-Tethys Ocean

Petrogenesis and Tectonic Setting of the Baluogenguole Mafic Dykes, Zongwulong Belt: Implications for Evolution of the Northern East Paleo-Tethys Ocean

Structures and chronology of the Yabrai shear zone in the Alxa, NW China: Constraints on the late Paleozoic shear system in central segment of the Central Asian Orogenic Belt

Early palaeozoic arc-continent collision in East Kunlun, northern Tibet: evidence from the minerology, geochemistry, and geochronology of the Adatan garnet amphibolites

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