The Late Silurian Langmuri Cu‐Ni Deposit in East Kunlun Orogenic Belt: An Example of Magmatic Sulfide Deposit in a Post‐Collisional Extensional Setting
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2025
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| author | Namkha Norbu Jinchao Li Zhouyuan Zhang Wenjing Zhang |
| author_facet | Namkha Norbu Jinchao Li Zhouyuan Zhang Wenjing Zhang Namkha Norbu Jinchao Li Zhouyuan Zhang Wenjing Zhang |
| collection | Wiley Open Access |
| contents | The Late Silurian Langmuri Cu‐Ni Deposit in East Kunlun Orogenic Belt: An Example of Magmatic Sulfide Deposit in a Post‐Collisional Extensional Setting Namkha Norbu Jinchao Li Zhouyuan Zhang Wenjing Zhang Island Arc ABSTRACT The East Kunlun orogenic belt (EKOB), located in the northeastern part of the Qinghai‐Tibet Plateau, is a significant Cu‐Ni mineralization region associated with the geological evolution of the Paleo‐Tethys and Proto‐Tethys stages. Orogenic environments in this region exhibit considerable metallogenic potential, with two distinct metallogenic models: the subduction‐related island arc model and the post‐collisional extensional model. This study investigates the petrology, zircon U–Pb chronology, and geochemistry of ore‐bearing intrusions in the Langmuri Cu‐Ni deposit. The results reveal that the wehrlite yields a zircon U–Pb age of 420.0 ± 1.4 Ma, with an average ε Hf ( t ) value of −5.5 and significant Nb‐Ta negative anomalies. These features suggest that the parental magma was likely derived from the partial melting of a metasomatized continental lithospheric mantle. Additionally, crustal contamination during magma ascent triggered significant crustal sulfur assimilation. The Langmuri deposit represents a mineralization event formed during the final tectonic stage of the Proto‐Tethys Ocean in a post‐collisional extensional setting. Slab breakoff released hydrous fluids and melts that metasomatically enriched the lithospheric mantle, thereby providing the material basis for magmatic sulfide segregation. 10.1111/iar.70013 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| doi_str_mv | 10.1111/iar.70013 |
| format | Artículo Open Access |
| id | wiley_oa_10_1111_iar_70013 |
| institution | Wiley Open Access |
| license_str_mv | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| publishDate | 2025 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | The Late Silurian Langmuri Cu‐Ni Deposit in East Kunlun Orogenic Belt: An Example of Magmatic Sulfide Deposit in a Post‐Collisional Extensional Setting Namkha Norbu Jinchao Li Zhouyuan Zhang Wenjing Zhang Island Arc The Late Silurian Langmuri Cu‐Ni Deposit in East Kunlun Orogenic Belt: An Example of Magmatic Sulfide Deposit in a Post‐Collisional Extensional Setting Namkha Norbu Jinchao Li Zhouyuan Zhang Wenjing Zhang Island Arc ABSTRACT The East Kunlun orogenic belt (EKOB), located in the northeastern part of the Qinghai‐Tibet Plateau, is a significant Cu‐Ni mineralization region associated with the geological evolution of the Paleo‐Tethys and Proto‐Tethys stages. Orogenic environments in this region exhibit considerable metallogenic potential, with two distinct metallogenic models: the subduction‐related island arc model and the post‐collisional extensional model. This study investigates the petrology, zircon U–Pb chronology, and geochemistry of ore‐bearing intrusions in the Langmuri Cu‐Ni deposit. The results reveal that the wehrlite yields a zircon U–Pb age of 420.0 ± 1.4 Ma, with an average ε Hf ( t ) value of −5.5 and significant Nb‐Ta negative anomalies. These features suggest that the parental magma was likely derived from the partial melting of a metasomatized continental lithospheric mantle. Additionally, crustal contamination during magma ascent triggered significant crustal sulfur assimilation. The Langmuri deposit represents a mineralization event formed during the final tectonic stage of the Proto‐Tethys Ocean in a post‐collisional extensional setting. Slab breakoff released hydrous fluids and melts that metasomatically enriched the lithospheric mantle, thereby providing the material basis for magmatic sulfide segregation. 10.1111/iar.70013 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| title | The Late Silurian Langmuri Cu‐Ni Deposit in East Kunlun Orogenic Belt: An Example of Magmatic Sulfide Deposit in a Post‐Collisional Extensional Setting |
| topic | Island Arc |
| url | https://onlinelibrary.wiley.com/doi/10.1111/iar.70013 |