DataSheet1_Geochemistry and zircon U–Pb ages of early Ordovician syenites from the Inexpressible Island, Antarctica and tectonic implications.docx
The Ross Orogenic Belt is in the Antarctica Transantarctic Mountains. North Victoria Land Granite Harbour Intrusive complex (GHI) records the tectonic-magmatism evolution of Ross orogeny. Extensively developed post-collisional granites around this margin of early Paleozoic magmatism can provide insi...
Main Authors: | , , |
---|---|
Format: | Dataset |
Language: | unknown |
Published: |
2023
|
Subjects: | |
Online Access: | https://doi.org/10.3389/feart.2022.966085.s001 https://figshare.com/articles/dataset/DataSheet1_Geochemistry_and_zircon_U_Pb_ages_of_early_Ordovician_syenites_from_the_Inexpressible_Island_Antarctica_and_tectonic_implications_docx/21875487 |
id |
ftfrontimediafig:oai:figshare.com:article/21875487 |
---|---|
record_format |
openpolar |
spelling |
ftfrontimediafig:oai:figshare.com:article/21875487 2024-09-15T17:40:17+00:00 DataSheet1_Geochemistry and zircon U–Pb ages of early Ordovician syenites from the Inexpressible Island, Antarctica and tectonic implications.docx Peng Gao Limei Tang Ling Chen 2023-01-12T04:06:42Z https://doi.org/10.3389/feart.2022.966085.s001 https://figshare.com/articles/dataset/DataSheet1_Geochemistry_and_zircon_U_Pb_ages_of_early_Ordovician_syenites_from_the_Inexpressible_Island_Antarctica_and_tectonic_implications_docx/21875487 unknown doi:10.3389/feart.2022.966085.s001 https://figshare.com/articles/dataset/DataSheet1_Geochemistry_and_zircon_U_Pb_ages_of_early_Ordovician_syenites_from_the_Inexpressible_Island_Antarctica_and_tectonic_implications_docx/21875487 CC BY 4.0 Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change U-Pb geochronology geochemistry Rose orogeny syenite Inexpressible island Dataset 2023 ftfrontimediafig https://doi.org/10.3389/feart.2022.966085.s001 2024-08-19T06:19:52Z The Ross Orogenic Belt is in the Antarctica Transantarctic Mountains. North Victoria Land Granite Harbour Intrusive complex (GHI) records the tectonic-magmatism evolution of Ross orogeny. Extensively developed post-collisional granites around this margin of early Paleozoic magmatism can provide insights into the growth of continental crust through accretionary orogenesis. We provide geochemical and geochronological data from syenites from Terra Nova Bay, north Victoria Land in order to constrain its tectonic evolution and setting. The syenite belongs to the potassium-alkaline, calc-alkaline series and is characterized by high concentrations of rare Earth elements and large ion lithophile elements (LILE), and low content in high field strength elements (Nb, Ta, P, Ti). The petrographic and geochemical signatures show a possible island-arc granite affinity. LA-ICP-MS zircon U-Pb dating results suggest that the Inexpressible Island syenite was emplaced at ca. 471.8 ± 1.8 Ma and 477.3 ± 1.7 Ma, respectively. Zircon ε Hf (t) values range from −7.4 to −9.1; average −8.2 and whole-rock ε Nd (t) values range from −8.5 to −10.3, indicating that formed by the partial melting of the lithospheric mantle enriched with subduction slab fluids and subcontinental lithosphere. Whereas, the syenite has a strong positive Eu anomaly and a positive Sr anomaly, suggesting that plagioclase cumulate crystallization occurred in the magma source area. Furthermore, through integration with previous studies, we suggest that syenite is a result of the melting zone of an older previously subduction enriched layer of the subcontinental lithospheric mantle (SCLM). To enable syenite emplacement we suggest a tectonic-magmatic model that invokes alternating phases of extension and contraction in the overriding plate. Finally, we report the youngest age of (post-orogenic) magmatism occurred during extension in the overriding plate ca. 478–471 Ma. Dataset Antarc* Antarctica Inexpressible Island Victoria Land Frontiers: Figshare |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change U-Pb geochronology geochemistry Rose orogeny syenite Inexpressible island |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change U-Pb geochronology geochemistry Rose orogeny syenite Inexpressible island Peng Gao Limei Tang Ling Chen DataSheet1_Geochemistry and zircon U–Pb ages of early Ordovician syenites from the Inexpressible Island, Antarctica and tectonic implications.docx |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change U-Pb geochronology geochemistry Rose orogeny syenite Inexpressible island |
description |
The Ross Orogenic Belt is in the Antarctica Transantarctic Mountains. North Victoria Land Granite Harbour Intrusive complex (GHI) records the tectonic-magmatism evolution of Ross orogeny. Extensively developed post-collisional granites around this margin of early Paleozoic magmatism can provide insights into the growth of continental crust through accretionary orogenesis. We provide geochemical and geochronological data from syenites from Terra Nova Bay, north Victoria Land in order to constrain its tectonic evolution and setting. The syenite belongs to the potassium-alkaline, calc-alkaline series and is characterized by high concentrations of rare Earth elements and large ion lithophile elements (LILE), and low content in high field strength elements (Nb, Ta, P, Ti). The petrographic and geochemical signatures show a possible island-arc granite affinity. LA-ICP-MS zircon U-Pb dating results suggest that the Inexpressible Island syenite was emplaced at ca. 471.8 ± 1.8 Ma and 477.3 ± 1.7 Ma, respectively. Zircon ε Hf (t) values range from −7.4 to −9.1; average −8.2 and whole-rock ε Nd (t) values range from −8.5 to −10.3, indicating that formed by the partial melting of the lithospheric mantle enriched with subduction slab fluids and subcontinental lithosphere. Whereas, the syenite has a strong positive Eu anomaly and a positive Sr anomaly, suggesting that plagioclase cumulate crystallization occurred in the magma source area. Furthermore, through integration with previous studies, we suggest that syenite is a result of the melting zone of an older previously subduction enriched layer of the subcontinental lithospheric mantle (SCLM). To enable syenite emplacement we suggest a tectonic-magmatic model that invokes alternating phases of extension and contraction in the overriding plate. Finally, we report the youngest age of (post-orogenic) magmatism occurred during extension in the overriding plate ca. 478–471 Ma. |
format |
Dataset |
author |
Peng Gao Limei Tang Ling Chen |
author_facet |
Peng Gao Limei Tang Ling Chen |
author_sort |
Peng Gao |
title |
DataSheet1_Geochemistry and zircon U–Pb ages of early Ordovician syenites from the Inexpressible Island, Antarctica and tectonic implications.docx |
title_short |
DataSheet1_Geochemistry and zircon U–Pb ages of early Ordovician syenites from the Inexpressible Island, Antarctica and tectonic implications.docx |
title_full |
DataSheet1_Geochemistry and zircon U–Pb ages of early Ordovician syenites from the Inexpressible Island, Antarctica and tectonic implications.docx |
title_fullStr |
DataSheet1_Geochemistry and zircon U–Pb ages of early Ordovician syenites from the Inexpressible Island, Antarctica and tectonic implications.docx |
title_full_unstemmed |
DataSheet1_Geochemistry and zircon U–Pb ages of early Ordovician syenites from the Inexpressible Island, Antarctica and tectonic implications.docx |
title_sort |
datasheet1_geochemistry and zircon u–pb ages of early ordovician syenites from the inexpressible island, antarctica and tectonic implications.docx |
publishDate |
2023 |
url |
https://doi.org/10.3389/feart.2022.966085.s001 https://figshare.com/articles/dataset/DataSheet1_Geochemistry_and_zircon_U_Pb_ages_of_early_Ordovician_syenites_from_the_Inexpressible_Island_Antarctica_and_tectonic_implications_docx/21875487 |
genre |
Antarc* Antarctica Inexpressible Island Victoria Land |
genre_facet |
Antarc* Antarctica Inexpressible Island Victoria Land |
op_relation |
doi:10.3389/feart.2022.966085.s001 https://figshare.com/articles/dataset/DataSheet1_Geochemistry_and_zircon_U_Pb_ages_of_early_Ordovician_syenites_from_the_Inexpressible_Island_Antarctica_and_tectonic_implications_docx/21875487 |
op_rights |
CC BY 4.0 |
op_doi |
https://doi.org/10.3389/feart.2022.966085.s001 |
_version_ |
1810486170633633792 |