Evolution and metallogeny of the Sanjiang arc-back arc basin system in the Eastern Tethys: An introduction

Zhou, Jia‐Xi; Li, Wenchang

doi:10.1016/j.jseaes.2021.104961

Cited by 10 publications

(2 citation statements)

References 45 publications

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“…They have proposed a model involving northward subduction of the Neo-Tethys plate, ridge subduction, and slab rollback [51,60]. Other scholars have also suggested that the formation of granites and andesites in southeastern Guangxi around 100 Ma is connected to the northward subduction of the Neo-Tethys plate [45, 59,61]. The Shilu intrusion (103.9 Ma) within the Yangchun Basin displays adakitic features and may have been formed through partial melting of the slab during the northward subduction of the Neo-Tethys Ocean [51].…”

Section: Tectonic Setting Of the Longwan Pb-zn Depositmentioning

confidence: 99%

Zircon and Garnet U–Pb Ages of the Longwan Skarn Pb–Zn Deposit in Guangxi Province, China and Their Geological Significance

Zhang

Ding

et al. 2023

Minerals

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Garnet is the most common alteration mineral in skarn-type deposits, and the geochronological research on it can limit the mineralization age. The Longwan Pb–Zn deposit, situated within the Fozichong Pb–Zn ore field in Guangxi, lacks precise geochronological data, limiting the in-depth comprehension of its genesis and tectonic setting. This study employs LA-ICP-MS U–Pb dating of garnets developed in the skarn orebody and zircons in the associated granitic porphyry to determine the deposit’s mineralization age. Backscatter electron images and electron probe microanalysis reveal common zonation characteristics in garnets from the Longwan Pb–Zn deposit, with dominant end-member compositions of Andradite and Grossular. The values of U concentrations range from 1.8 ppm to 3.7 ppm, and a garnet U–Pb age of 102.6 ± 1.9 Ma was obtained, consistent with the zircon U–Pb age of 102.1 ± 1.2 Ma from the granite porphyry within the deposit. The Longwan Pb–Zn deposit formed during the late Early Cretaceous as a skarn deposit resulting from contact metasomatism between the granite porphyry and the host rock. The deposit likely formed in response to the Neo-Tethys plate subducting beneath the South China continent during the Cretaceous, followed by a retreat during the Late Cretaceous. The Cenxi-Bobai Fault experienced reactivation under the extensional tectonic regime induced by the Neo-Tethys Ocean’s retreat, leading to a series of magmatic activities along the NE-trending direction within the Fault. The Longwan Pb–Zn deposit formed during the processes of magma emplacement and contact metasomatic reactions with the country rock.

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Section: Tectonic Setting Of the Longwan Pb-zn Depositmentioning

confidence: 99%

Zircon and Garnet U–Pb Ages of the Longwan Skarn Pb–Zn Deposit in Guangxi Province, China and Their Geological Significance

Zhang

Ding

et al. 2023

Minerals

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“…Scholars have different views on the scale and type of these sedimentary bodies. Some believe that ne-grained sedimentary rocks are related to the deepening of water bodies at that time, that is, many mudstones in the center of the deep depression are the products of deep-water sedimentation (Wang et al, 2020;Liang et al, 2021;Zhou and Li, 2021;Yao et al, 2022). However, some scholars hold the opposite view.…”

Section: Introductionmentioning

confidence: 99%

Evolution mechanism of diagenesis of deep sag area in the central Fault basin—A case study of the Wuerhe Formation of the Dongdaohaizi sag in the Junggar basin, Northwest China

Wang

Xie

2023

Preprint

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The Junggar basin is a typical terrestrial fault basin. The stratum in the central area is deeply buried and its sedimentary and rock types are diverse. Its diagenesis is complex and the evolution law of reservoir pores is challenging to characterize, which is not conducive to oil and gas exploration in this region. In this paper, the Dongdaohaizi sag in the central deep basin was taken as an example to be detailed on its sedimentary facies, diagenesis, and micropore structure, revealing the diagenesis sequence and pore evolution law of the deep buried reservoir. First, the sedimentary facies type of the focus stratum (Wuerhe Formation) is assigned to the fan delta, its source is from the northwest, and the rock type is conglomerate, pebbly sandstone, sandstone, and siltstone. The debris content is high among the clastic grains and can reach 40%, showing near-source transport characteristics. Second, the primary diagenesis types and evolution sequence of the Wuerhe Formation is cleared according to experiment data, and the influence degree of the compassion, cementation, and dissolution of the target reservoir rock is clarified. Finally, the sandstone pore evolution model is established, the diagenesis facies is classified, the contribution degree of the unstable clasts and cemented minerals to the secondary pore is determined, and the comprehensive factors with the greatest impact on the late densification of the reservoir are clarified. The diagenesis and pore evolution of the deep rocks in the deep central sag are revealed.

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An evolving MVT hydrothermal system: Insights from the Niujiaotang Cd-Zn ore field, SW China

Zhou

Yang²,

An³

et al. 2022

Journal of Asian Earth Sciences

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Evolution and metallogeny of the Sanjiang arc-back arc basin system in the Eastern Tethys: An introduction

Cited by 10 publications

References 45 publications

Zircon and Garnet U–Pb Ages of the Longwan Skarn Pb–Zn Deposit in Guangxi Province, China and Their Geological Significance

Zircon and Garnet U–Pb Ages of the Longwan Skarn Pb–Zn Deposit in Guangxi Province, China and Their Geological Significance

Evolution mechanism of diagenesis of deep sag area in the central Fault basin—A case study of the Wuerhe Formation of the Dongdaohaizi sag in the Junggar basin, Northwest China

An evolving MVT hydrothermal system: Insights from the Niujiaotang Cd-Zn ore field, SW China

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