Geochronology and petrogeochemistry of Late Permian volcanic rocks in the B.Xiengnou area, Northwestern Laos: Petrogenesis and tectonic significance
The Nan Suture and Sukhothai Arc Terrane are products of the eastward subduction of the Paleotethyan Ocean during the Late Carboniferous to Triassic. However, their footprints in northwestern Laos are poorly constrained. New geochronological and geochemical data presented in this study demonstrate a...
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KeAi Communications Co., Ltd.
2021-12-01
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2096519222000088 |
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| author | Mei-feng Shi Bao-ci Xu Zhen-bo Wu Shu-sheng Liu Gerrit Pieter Goosen Zhi-min Peng Fei Nie Hui-min Liang |
| author_facet | Mei-feng Shi Bao-ci Xu Zhen-bo Wu Shu-sheng Liu Gerrit Pieter Goosen Zhi-min Peng Fei Nie Hui-min Liang |
| author_sort | Mei-feng Shi |
| collection | DOAJ |
| description | The Nan Suture and Sukhothai Arc Terrane are products of the eastward subduction of the Paleotethyan Ocean during the Late Carboniferous to Triassic. However, their footprints in northwestern Laos are poorly constrained. New geochronological and geochemical data presented in this study demonstrate a Late Permian origin for the andesitic rocks in the B.Xiengnou area rather than Late Triassic. The breccia-bearing andesitic tuff in the B.On ultramafic complex yield a zircon U-Pb age of 260 ± 1.4 Ma, geochemically displaying a MORB-like signature. The andesitic tuff in the B.Kiophoulan-B.Houayhak belt gave the U-Pb age of 254 ± 1.3 Ma, with arc-like geochemical affinity. By combining geochronological and geochemical data from the Nan Suture and Sukhothai Arc Terrane, the authors suggest that the andesitic rocks in the B.On ultramafic complex formed in a back-arc basin background, which connected the Jinghong and Nan back-arc basin during the Permian; while the andesitic tuff in the B.Kiophoulan-B.Houayhak belt erupted in the Sukhothai continental arc setting.©2021 China Geology Editorial Office. |
| first_indexed | 2024-04-10T16:57:43Z |
| format | Article |
| id | doaj.art-af84dae99fef499ea3247de68cf4eb32 |
| institution | Directory Open Access Journal |
| issn | 2096-5192 |
| language | English |
| last_indexed | 2024-04-10T16:57:43Z |
| publishDate | 2021-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | China Geology |
| spelling | doaj.art-af84dae99fef499ea3247de68cf4eb322023-02-07T04:22:46ZengKeAi Communications Co., Ltd.China Geology2096-51922021-12-0144630643Geochronology and petrogeochemistry of Late Permian volcanic rocks in the B.Xiengnou area, Northwestern Laos: Petrogenesis and tectonic significanceMei-feng Shi0Bao-ci Xu1Zhen-bo Wu2Shu-sheng Liu3Gerrit Pieter Goosen4Zhi-min Peng5Fei Nie6Hui-min Liang7Chengdu Center, China Geological Survey, Ministry of Natural Resource, Chengdu 610081, China; Corresponding author: E-mail address: shimeifeng-1204@163.com (Mei-feng Shi).Department of Earth and Environmental Sciences, University of Waterloo, Waterloo N2L3G1, CanadaChengdu Center, China Geological Survey, Ministry of Natural Resource, Chengdu 610081, ChinaChengdu Center, China Geological Survey, Ministry of Natural Resource, Chengdu 610081, ChinaDepartment of Geosciences, Nelson Mandela University, Port Elizabeth 6045, South AfricaChengdu Center, China Geological Survey, Ministry of Natural Resource, Chengdu 610081, ChinaChengdu Center, China Geological Survey, Ministry of Natural Resource, Chengdu 610081, ChinaChengdu Center, China Geological Survey, Ministry of Natural Resource, Chengdu 610081, ChinaThe Nan Suture and Sukhothai Arc Terrane are products of the eastward subduction of the Paleotethyan Ocean during the Late Carboniferous to Triassic. However, their footprints in northwestern Laos are poorly constrained. New geochronological and geochemical data presented in this study demonstrate a Late Permian origin for the andesitic rocks in the B.Xiengnou area rather than Late Triassic. The breccia-bearing andesitic tuff in the B.On ultramafic complex yield a zircon U-Pb age of 260 ± 1.4 Ma, geochemically displaying a MORB-like signature. The andesitic tuff in the B.Kiophoulan-B.Houayhak belt gave the U-Pb age of 254 ± 1.3 Ma, with arc-like geochemical affinity. By combining geochronological and geochemical data from the Nan Suture and Sukhothai Arc Terrane, the authors suggest that the andesitic rocks in the B.On ultramafic complex formed in a back-arc basin background, which connected the Jinghong and Nan back-arc basin during the Permian; while the andesitic tuff in the B.Kiophoulan-B.Houayhak belt erupted in the Sukhothai continental arc setting.©2021 China Geology Editorial Office.http://www.sciencedirect.com/science/article/pii/S2096519222000088Zircon U-Pb ageGeochronologyPetrogeochemistryTethyan evolutionNan SutureSukhothai Arc |
| spellingShingle | Mei-feng Shi Bao-ci Xu Zhen-bo Wu Shu-sheng Liu Gerrit Pieter Goosen Zhi-min Peng Fei Nie Hui-min Liang Geochronology and petrogeochemistry of Late Permian volcanic rocks in the B.Xiengnou area, Northwestern Laos: Petrogenesis and tectonic significance China Geology Zircon U-Pb age Geochronology Petrogeochemistry Tethyan evolution Nan Suture Sukhothai Arc |
| title | Geochronology and petrogeochemistry of Late Permian volcanic rocks in the B.Xiengnou area, Northwestern Laos: Petrogenesis and tectonic significance |
| title_full | Geochronology and petrogeochemistry of Late Permian volcanic rocks in the B.Xiengnou area, Northwestern Laos: Petrogenesis and tectonic significance |
| title_fullStr | Geochronology and petrogeochemistry of Late Permian volcanic rocks in the B.Xiengnou area, Northwestern Laos: Petrogenesis and tectonic significance |
| title_full_unstemmed | Geochronology and petrogeochemistry of Late Permian volcanic rocks in the B.Xiengnou area, Northwestern Laos: Petrogenesis and tectonic significance |
| title_short | Geochronology and petrogeochemistry of Late Permian volcanic rocks in the B.Xiengnou area, Northwestern Laos: Petrogenesis and tectonic significance |
| title_sort | geochronology and petrogeochemistry of late permian volcanic rocks in the b xiengnou area northwestern laos petrogenesis and tectonic significance |
| topic | Zircon U-Pb age Geochronology Petrogeochemistry Tethyan evolution Nan Suture Sukhothai Arc |
| url | http://www.sciencedirect.com/science/article/pii/S2096519222000088 |
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