Petrogenesis and tectonic significance of the early Paleozoic Delenuoer ophiolite in the Central Qilian Shan, northeastern Tibetan Plateau
The newly discovered early Paleozoic Delenuoer ophiolite, in the western margin of the Central Qilian Shan, is composed of serpentinized peridotite, cumulate gabbro, diabase, massive basalt, and pillow basalt. This study presents geochronological and geochemical data for the cumulate gabbro and basa...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-11-01
|
| Series: | Geoscience Frontiers |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674987120301407 |
| _version_ | 1797763818996105216 |
|---|---|
| author | Zhen Ma Jinrong Wang Liangliang Zhang Yixin Liu Yunyun Gao Xiang Zhang Sheng Yu Cheng Zhang |
| author_facet | Zhen Ma Jinrong Wang Liangliang Zhang Yixin Liu Yunyun Gao Xiang Zhang Sheng Yu Cheng Zhang |
| author_sort | Zhen Ma |
| collection | DOAJ |
| description | The newly discovered early Paleozoic Delenuoer ophiolite, in the western margin of the Central Qilian Shan, is composed of serpentinized peridotite, cumulate gabbro, diabase, massive basalt, and pillow basalt. This study presents geochronological and geochemical data for the cumulate gabbro and basalt. LA–ICP–MS U–Pb dating of zircons from the cumulate gabbro yielded a magmatic crystallization age of 472 ± 4 Ma. The basalts have normal mid-ocean ridge basalt (N-MORB) compositions and a narrow range of εNd(t) values (+4.5 to +5.3), which indicates they were derived from a depleted mantle source. On the basis of regional geological constraints, it is proposed that the Delenuoer ophiolite is a westward extension of the South Ophiolite Belt (Yushigou–Youhulugou–Donggou–Dongcaohe Ophiolite Belt) in the North Qilian Shan. The Delenuoer ophiolite, along with the Gulangxia–Delenuoer fault, defines the westernmost part of the tectonic boundary between the North and Central Qilian Shan. This ophiolite may have formed during southward subduction of the Qilian Ocean slab during the early Paleozoic. |
| first_indexed | 2024-03-12T19:47:46Z |
| format | Article |
| id | doaj.art-05f6f6fe28284c6998253ab82284bdde |
| institution | Directory Open Access Journal |
| issn | 1674-9871 |
| language | English |
| last_indexed | 2024-03-12T19:47:46Z |
| publishDate | 2020-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Geoscience Frontiers |
| spelling | doaj.art-05f6f6fe28284c6998253ab82284bdde2023-08-02T03:25:02ZengElsevierGeoscience Frontiers1674-98712020-11-0111620172029Petrogenesis and tectonic significance of the early Paleozoic Delenuoer ophiolite in the Central Qilian Shan, northeastern Tibetan PlateauZhen Ma0Jinrong Wang1Liangliang Zhang2Yixin Liu3Yunyun Gao4Xiang Zhang5Sheng Yu6Cheng Zhang7Key Laboratory of Mineral Resources in Western China, School of Earth Sciences, Lanzhou University, Lanzhou, 730000, ChinaKey Laboratory of Mineral Resources in Western China, School of Earth Sciences, Lanzhou University, Lanzhou, 730000, China; Corresponding author.State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing, 100083, ChinaKey Laboratory of Mineral Resources in Western China, School of Earth Sciences, Lanzhou University, Lanzhou, 730000, ChinaChangqing Branch, Research Institute of Bureau of Geophysical Prospecting, China National Petroleum Corporation, Xi’an, 710021, ChinaGeological Survey of Gansu Province, Lanzhou, 730000, ChinaNo.2 Geology and Mineral Exploration Team, Gansu Provincial Bureau of Geology and Mineral Exploration and Development, Lanzhou, 730000, ChinaNo.2 Geology and Mineral Exploration Team, Gansu Provincial Bureau of Geology and Mineral Exploration and Development, Lanzhou, 730000, ChinaThe newly discovered early Paleozoic Delenuoer ophiolite, in the western margin of the Central Qilian Shan, is composed of serpentinized peridotite, cumulate gabbro, diabase, massive basalt, and pillow basalt. This study presents geochronological and geochemical data for the cumulate gabbro and basalt. LA–ICP–MS U–Pb dating of zircons from the cumulate gabbro yielded a magmatic crystallization age of 472 ± 4 Ma. The basalts have normal mid-ocean ridge basalt (N-MORB) compositions and a narrow range of εNd(t) values (+4.5 to +5.3), which indicates they were derived from a depleted mantle source. On the basis of regional geological constraints, it is proposed that the Delenuoer ophiolite is a westward extension of the South Ophiolite Belt (Yushigou–Youhulugou–Donggou–Dongcaohe Ophiolite Belt) in the North Qilian Shan. The Delenuoer ophiolite, along with the Gulangxia–Delenuoer fault, defines the westernmost part of the tectonic boundary between the North and Central Qilian Shan. This ophiolite may have formed during southward subduction of the Qilian Ocean slab during the early Paleozoic.http://www.sciencedirect.com/science/article/pii/S1674987120301407OphioliteDelenuoerCentral Qilian ShanEarly PaleozoicTectonic boundary |
| spellingShingle | Zhen Ma Jinrong Wang Liangliang Zhang Yixin Liu Yunyun Gao Xiang Zhang Sheng Yu Cheng Zhang Petrogenesis and tectonic significance of the early Paleozoic Delenuoer ophiolite in the Central Qilian Shan, northeastern Tibetan Plateau Geoscience Frontiers Ophiolite Delenuoer Central Qilian Shan Early Paleozoic Tectonic boundary |
| title | Petrogenesis and tectonic significance of the early Paleozoic Delenuoer ophiolite in the Central Qilian Shan, northeastern Tibetan Plateau |
| title_full | Petrogenesis and tectonic significance of the early Paleozoic Delenuoer ophiolite in the Central Qilian Shan, northeastern Tibetan Plateau |
| title_fullStr | Petrogenesis and tectonic significance of the early Paleozoic Delenuoer ophiolite in the Central Qilian Shan, northeastern Tibetan Plateau |
| title_full_unstemmed | Petrogenesis and tectonic significance of the early Paleozoic Delenuoer ophiolite in the Central Qilian Shan, northeastern Tibetan Plateau |
| title_short | Petrogenesis and tectonic significance of the early Paleozoic Delenuoer ophiolite in the Central Qilian Shan, northeastern Tibetan Plateau |
| title_sort | petrogenesis and tectonic significance of the early paleozoic delenuoer ophiolite in the central qilian shan northeastern tibetan plateau |
| topic | Ophiolite Delenuoer Central Qilian Shan Early Paleozoic Tectonic boundary |
| url | http://www.sciencedirect.com/science/article/pii/S1674987120301407 |
| work_keys_str_mv | AT zhenma petrogenesisandtectonicsignificanceoftheearlypaleozoicdelenuoerophioliteinthecentralqilianshannortheasterntibetanplateau AT jinrongwang petrogenesisandtectonicsignificanceoftheearlypaleozoicdelenuoerophioliteinthecentralqilianshannortheasterntibetanplateau AT liangliangzhang petrogenesisandtectonicsignificanceoftheearlypaleozoicdelenuoerophioliteinthecentralqilianshannortheasterntibetanplateau AT yixinliu petrogenesisandtectonicsignificanceoftheearlypaleozoicdelenuoerophioliteinthecentralqilianshannortheasterntibetanplateau AT yunyungao petrogenesisandtectonicsignificanceoftheearlypaleozoicdelenuoerophioliteinthecentralqilianshannortheasterntibetanplateau AT xiangzhang petrogenesisandtectonicsignificanceoftheearlypaleozoicdelenuoerophioliteinthecentralqilianshannortheasterntibetanplateau AT shengyu petrogenesisandtectonicsignificanceoftheearlypaleozoicdelenuoerophioliteinthecentralqilianshannortheasterntibetanplateau AT chengzhang petrogenesisandtectonicsignificanceoftheearlypaleozoicdelenuoerophioliteinthecentralqilianshannortheasterntibetanplateau |