Geochronology, trace elements and Hf isotopic geochemistry of zircons from Swat orthogneisses, Northern Pakistan
In this study, zircon grains are applied for U–Pb dating, Hf isotopes and trace elements to reveal the origin of magmatism and tectonic evolution of Late Paleozoic rocks of the Indian plate, Northern Pakistan. Most of the zircons are characterized by oscillatory zoning, depletion of light rare earth...
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| Format: | Article |
| Language: | English |
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De Gruyter
2020-06-01
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| Series: | Open Geosciences |
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| Online Access: | https://doi.org/10.1515/geo-2020-0109 |
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| author | Sheikh Lawangin Lutfi Wasiq Zhao Zhidan Awais Muhammad |
| author_facet | Sheikh Lawangin Lutfi Wasiq Zhao Zhidan Awais Muhammad |
| author_sort | Sheikh Lawangin |
| collection | DOAJ |
| description | In this study, zircon grains are applied for U–Pb dating, Hf isotopes and trace elements to reveal the origin of magmatism and tectonic evolution of Late Paleozoic rocks of the Indian plate, Northern Pakistan. Most of the zircons are characterized by oscillatory zoning, depletion of light rare earth elements (LREE) and enrichment of heavy rare earth elements (HREE) with Ce and Eu anomalies. The yielded ages for these rocks are 256 ± 1.9 Ma and are plotted in the zones defined for the continental setting with few deviated toward the mid-oceanic ridge and the oceanic arc setting. Deviated zircons are recognized as inherited zircons by displaying a high concentration of normalized primitive La and Pr values, while others are plotted in the continental zones. Rare earth elements (REE) and trace elements including Th, Hf, U, Nb, Sc and Ti discriminate Swat orthogneisses into the within plate setting and the inherited zircons are plotted in the orogenic or the arc-related setting. The LREE discriminated these zircons into a magmatic zone with inherited zircons deviated toward the hydrothermal zone. The temperature calculated for these rocks based on the Ti content in zircon ranges from 679 to 942°C. The εHf(t) ranging from −11.1 to +1.4 reveals that the origin is the continental crust with the minute input of the juvenile mantle. |
| first_indexed | 2024-12-22T13:23:07Z |
| format | Article |
| id | doaj.art-358db7041f134363b7c6c693372dbf3e |
| institution | Directory Open Access Journal |
| issn | 2391-5447 |
| language | English |
| last_indexed | 2024-12-22T13:23:07Z |
| publishDate | 2020-06-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Geosciences |
| spelling | doaj.art-358db7041f134363b7c6c693372dbf3e2022-12-21T18:24:24ZengDe GruyterOpen Geosciences2391-54472020-06-0112114816210.1515/geo-2020-0109geo-2020-0109Geochronology, trace elements and Hf isotopic geochemistry of zircons from Swat orthogneisses, Northern PakistanSheikh Lawangin0Lutfi Wasiq1Zhao Zhidan2Awais Muhammad3State Key Laboratory of Geological Processes and Mineral Resources, and School of Earth Science and Resources, China University of Geosciences, Beijing 100083, ChinaState Key Laboratory of Geological Processes and Mineral Resources, and School of Earth Science and Resources, China University of Geosciences, Beijing 100083, ChinaState Key Laboratory of Geological Processes and Mineral Resources, and School of Earth Science and Resources, China University of Geosciences, Beijing 100083, ChinaDepartment of Geology, University of Swabi, Anbar, Swabi, Khyber Pakhtunkhwa, PakistanIn this study, zircon grains are applied for U–Pb dating, Hf isotopes and trace elements to reveal the origin of magmatism and tectonic evolution of Late Paleozoic rocks of the Indian plate, Northern Pakistan. Most of the zircons are characterized by oscillatory zoning, depletion of light rare earth elements (LREE) and enrichment of heavy rare earth elements (HREE) with Ce and Eu anomalies. The yielded ages for these rocks are 256 ± 1.9 Ma and are plotted in the zones defined for the continental setting with few deviated toward the mid-oceanic ridge and the oceanic arc setting. Deviated zircons are recognized as inherited zircons by displaying a high concentration of normalized primitive La and Pr values, while others are plotted in the continental zones. Rare earth elements (REE) and trace elements including Th, Hf, U, Nb, Sc and Ti discriminate Swat orthogneisses into the within plate setting and the inherited zircons are plotted in the orogenic or the arc-related setting. The LREE discriminated these zircons into a magmatic zone with inherited zircons deviated toward the hydrothermal zone. The temperature calculated for these rocks based on the Ti content in zircon ranges from 679 to 942°C. The εHf(t) ranging from −11.1 to +1.4 reveals that the origin is the continental crust with the minute input of the juvenile mantle.https://doi.org/10.1515/geo-2020-0109late paleozoiczircon trace elementshf isotopesanorogenicnorthern pakistan |
| spellingShingle | Sheikh Lawangin Lutfi Wasiq Zhao Zhidan Awais Muhammad Geochronology, trace elements and Hf isotopic geochemistry of zircons from Swat orthogneisses, Northern Pakistan Open Geosciences late paleozoic zircon trace elements hf isotopes anorogenic northern pakistan |
| title | Geochronology, trace elements and Hf isotopic geochemistry of zircons from Swat orthogneisses, Northern Pakistan |
| title_full | Geochronology, trace elements and Hf isotopic geochemistry of zircons from Swat orthogneisses, Northern Pakistan |
| title_fullStr | Geochronology, trace elements and Hf isotopic geochemistry of zircons from Swat orthogneisses, Northern Pakistan |
| title_full_unstemmed | Geochronology, trace elements and Hf isotopic geochemistry of zircons from Swat orthogneisses, Northern Pakistan |
| title_short | Geochronology, trace elements and Hf isotopic geochemistry of zircons from Swat orthogneisses, Northern Pakistan |
| title_sort | geochronology trace elements and hf isotopic geochemistry of zircons from swat orthogneisses northern pakistan |
| topic | late paleozoic zircon trace elements hf isotopes anorogenic northern pakistan |
| url | https://doi.org/10.1515/geo-2020-0109 |
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