Implications of Nd isotopic mapping for crustal composition and metallogenesis in the Sanjiang orogenic belt (SW China)
The Sanjiang orogenic belt, located in southwestern China and the southeastern Tibetan Plateau, includes a variety of economically important metal deposits. Previous studies have focused on Lu-Hf isotopic mapping to suggest its lithospheric architecture and mineralization. In this study, we provide...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2023-05-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1131338/full |
| _version_ | 1797831020026789888 |
|---|---|
| author | Lingling Yuan Peng Chai Zengqian Hou Yuanchuan Zheng Haihui Quan |
| author_facet | Lingling Yuan Peng Chai Zengqian Hou Yuanchuan Zheng Haihui Quan |
| author_sort | Lingling Yuan |
| collection | DOAJ |
| description | The Sanjiang orogenic belt, located in southwestern China and the southeastern Tibetan Plateau, includes a variety of economically important metal deposits. Previous studies have focused on Lu-Hf isotopic mapping to suggest its lithospheric architecture and mineralization. In this study, we provide the results of Nd isotopic mapping and compare them with the results of Hf isotopic mapping based on the similarity of Sm-Nd and Lu-Hf isotope systems, which indicate three juvenile domains with high εNd(t) and young Nd model ages within the Eastern Qiangtang-Simao terrane, while presenting negative εNd(t) values over the entire horizon. The very negative εNd(t) and old Nd model ages found in the Tengchong-Baoshan terrane and Changning-Menglian suture suggest that these terranes are old and might be reworked. The Nd isotopic mapping of the Sanjiang orogenic belt also suggests a relationship between different lithospheric architectures and the locations of distinct ore deposits. Porphyry-skarn Cu–Mo–(Au) deposits occur in the juvenile crust, which has relatively high εNd(t) (−3.3–5.1) and young TDM ages, whereas skarn and hydrothermal vein-type W–Sn deposits and Pb‒Zn‒Cu‒Ag deposits are located in the low-εNd(t) area. |
| first_indexed | 2024-04-09T13:46:15Z |
| format | Article |
| id | doaj.art-ac49c06a81084bd98462b61c3ccfa185 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-09T13:46:15Z |
| publishDate | 2023-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-ac49c06a81084bd98462b61c3ccfa1852023-05-09T04:39:47ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-05-011110.3389/feart.2023.11313381131338Implications of Nd isotopic mapping for crustal composition and metallogenesis in the Sanjiang orogenic belt (SW China)Lingling Yuan0Peng Chai1Zengqian Hou2Yuanchuan Zheng3Haihui Quan4Institute of Geology, Chinese Academy of Geological Sciences (CAGS), Beijing, ChinaInstitute of Geology, Chinese Academy of Geological Sciences (CAGS), Beijing, ChinaInstitute of Geology, Chinese Academy of Geological Sciences (CAGS), Beijing, ChinaState Key Laboratory of Geological Process and Mineral Resources, School of Earth Sciences and Resources, China University of Geosciences Beijing, Beijing, ChinaInstitute of Geology, Chinese Academy of Geological Sciences (CAGS), Beijing, ChinaThe Sanjiang orogenic belt, located in southwestern China and the southeastern Tibetan Plateau, includes a variety of economically important metal deposits. Previous studies have focused on Lu-Hf isotopic mapping to suggest its lithospheric architecture and mineralization. In this study, we provide the results of Nd isotopic mapping and compare them with the results of Hf isotopic mapping based on the similarity of Sm-Nd and Lu-Hf isotope systems, which indicate three juvenile domains with high εNd(t) and young Nd model ages within the Eastern Qiangtang-Simao terrane, while presenting negative εNd(t) values over the entire horizon. The very negative εNd(t) and old Nd model ages found in the Tengchong-Baoshan terrane and Changning-Menglian suture suggest that these terranes are old and might be reworked. The Nd isotopic mapping of the Sanjiang orogenic belt also suggests a relationship between different lithospheric architectures and the locations of distinct ore deposits. Porphyry-skarn Cu–Mo–(Au) deposits occur in the juvenile crust, which has relatively high εNd(t) (−3.3–5.1) and young TDM ages, whereas skarn and hydrothermal vein-type W–Sn deposits and Pb‒Zn‒Cu‒Ag deposits are located in the low-εNd(t) area.https://www.frontiersin.org/articles/10.3389/feart.2023.1131338/fullSanjiangNd isotopic mappingcrustal compositionmetallogenesiscrustal architecture |
| spellingShingle | Lingling Yuan Peng Chai Zengqian Hou Yuanchuan Zheng Haihui Quan Implications of Nd isotopic mapping for crustal composition and metallogenesis in the Sanjiang orogenic belt (SW China) Frontiers in Earth Science Sanjiang Nd isotopic mapping crustal composition metallogenesis crustal architecture |
| title | Implications of Nd isotopic mapping for crustal composition and metallogenesis in the Sanjiang orogenic belt (SW China) |
| title_full | Implications of Nd isotopic mapping for crustal composition and metallogenesis in the Sanjiang orogenic belt (SW China) |
| title_fullStr | Implications of Nd isotopic mapping for crustal composition and metallogenesis in the Sanjiang orogenic belt (SW China) |
| title_full_unstemmed | Implications of Nd isotopic mapping for crustal composition and metallogenesis in the Sanjiang orogenic belt (SW China) |
| title_short | Implications of Nd isotopic mapping for crustal composition and metallogenesis in the Sanjiang orogenic belt (SW China) |
| title_sort | implications of nd isotopic mapping for crustal composition and metallogenesis in the sanjiang orogenic belt sw china |
| topic | Sanjiang Nd isotopic mapping crustal composition metallogenesis crustal architecture |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1131338/full |
| work_keys_str_mv | AT linglingyuan implicationsofndisotopicmappingforcrustalcompositionandmetallogenesisinthesanjiangorogenicbeltswchina AT pengchai implicationsofndisotopicmappingforcrustalcompositionandmetallogenesisinthesanjiangorogenicbeltswchina AT zengqianhou implicationsofndisotopicmappingforcrustalcompositionandmetallogenesisinthesanjiangorogenicbeltswchina AT yuanchuanzheng implicationsofndisotopicmappingforcrustalcompositionandmetallogenesisinthesanjiangorogenicbeltswchina AT haihuiquan implicationsofndisotopicmappingforcrustalcompositionandmetallogenesisinthesanjiangorogenicbeltswchina |