Detrital zircon geochronology of the Lützow-Holm Complex, East Antarctica: implications for Antarctica-Sri Lanka correlation
The Lützow-Holm Complex (LHC) of East Antarctica has been regarded as a collage of Neoarchean (ca. 2.5 Ga), Paleoproterozoic (ca. 1.8 Ga), and Neoproterozoic (ca. 1.0 Ga) magmatic arcs which were amalgamated through the latest Neoproterozoic collisional events during the assembly of Gondwana superco...
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/116558 2023-12-17T10:19:49+01:00 Detrital zircon geochronology of the Lützow-Holm Complex, East Antarctica: implications for Antarctica-Sri Lanka correlation Takamura, Y. Tsunogae, T. Santosh, M. Tsutsumi, Y. 2018 application/pdf http://hdl.handle.net/2440/116558 https://doi.org/10.1016/j.gsf.2017.08.006 en eng Elsevier Geoscience Frontiers, 2018; 9(2):355-375 1674-9871 http://hdl.handle.net/2440/116558 doi:10.1016/j.gsf.2017.08.006 Santosh, M. [0000-0002-1073-8477] © 2018 China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). http://dx.doi.org/10.1016/j.gsf.2017.08.006 The northern Lützow-Holm–Vijayan Complex zircon U–Pb geochronology crustal evolution tectonic correlations Gondwana supercontinent Journal article 2018 ftunivadelaidedl https://doi.org/10.1016/j.gsf.2017.08.006 2023-11-20T23:27:08Z The Lützow-Holm Complex (LHC) of East Antarctica has been regarded as a collage of Neoarchean (ca. 2.5 Ga), Paleoproterozoic (ca. 1.8 Ga), and Neoproterozoic (ca. 1.0 Ga) magmatic arcs which were amalgamated through the latest Neoproterozoic collisional events during the assembly of Gondwana supercontinent. Here, we report new geochronological data on detrital zircons in metasediments associated with the magmatic rocks from the LHC, and compare the age spectra with those in the adjacent terranes for evaluating the tectonic correlation of East Antarctica and Sri Lanka. Cores of detrital zircon grains with high Th/U ratio in eight metasediment samples can be subdivided into two dominant groups: (1) late Meso- to Neoproterozoic (1.1–0.63 Ga) zircons from the northeastern part of the LHC in Prince Olav Coast and northern Sôya Coast areas, and (2) dominantly Neoarchean to Paleoproterozoic (2.8–2.4 Ga) zircons from the southwestern part of the LHC in southern Lützow-Holm Bay area. The ca. 1.0 Ga and ca. 2.5 Ga magmatic suites in the LHC could be proximal provenances of the detrital zircons in the northeastern and southwestern LHC, respectively. Subordinate middle to late Mesoproterozoic (1.3–1.2 Ga) detrital zircons obtained from Akarui Point and Langhovde could have been derived from adjacent Gondwana fragments (e.g., Rayner Complex, Eastern Ghats Belt). Meso- to Neoproterozoic domains such as Vijayan and Wanni Complexes of Sri Lanka, the southern Madurai Block of southern India, and the central-western Madagascar could be alternative distal sources of the late Meso- to Neoproterozoic zircons. Paleo- to Mesoarchean domains in India, Africa, and Antarctica might also be distal sources for the minor ∼2.8 Ga detrital zircons from Skallevikshalsen. The detrital zircons from the Highland Complex of Sri Lanka show similar Neoarchean to Paleoproterozoic (ca. 2.5 Ga) and Neoproterozoic (ca. 1.0 Ga) ages, which are comparable with those of the LHC, suggesting that the two complexes might have formed under similar tectonic ... Article in Journal/Newspaper Antarc* Antarctica East Antarctica Prince Olav Coast The University of Adelaide: Digital Library East Antarctica Langhovde ENVELOPE(39.733,39.733,-69.217,-69.217) Lützow-Holm Bay ENVELOPE(38.000,38.000,-69.500,-69.500) Prince Olav Coast ENVELOPE(41.000,41.000,-69.000,-69.000) Rayner ENVELOPE(-45.166,-45.166,-60.650,-60.650) Skallevikshalsen ENVELOPE(39.333,39.333,-69.692,-69.692) Sôya Coast ENVELOPE(39.750,39.750,-69.300,-69.300) Geoscience Frontiers 9 2 355 375 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
The northern Lützow-Holm–Vijayan Complex zircon U–Pb geochronology crustal evolution tectonic correlations Gondwana supercontinent |
spellingShingle |
The northern Lützow-Holm–Vijayan Complex zircon U–Pb geochronology crustal evolution tectonic correlations Gondwana supercontinent Takamura, Y. Tsunogae, T. Santosh, M. Tsutsumi, Y. Detrital zircon geochronology of the Lützow-Holm Complex, East Antarctica: implications for Antarctica-Sri Lanka correlation |
topic_facet |
The northern Lützow-Holm–Vijayan Complex zircon U–Pb geochronology crustal evolution tectonic correlations Gondwana supercontinent |
description |
The Lützow-Holm Complex (LHC) of East Antarctica has been regarded as a collage of Neoarchean (ca. 2.5 Ga), Paleoproterozoic (ca. 1.8 Ga), and Neoproterozoic (ca. 1.0 Ga) magmatic arcs which were amalgamated through the latest Neoproterozoic collisional events during the assembly of Gondwana supercontinent. Here, we report new geochronological data on detrital zircons in metasediments associated with the magmatic rocks from the LHC, and compare the age spectra with those in the adjacent terranes for evaluating the tectonic correlation of East Antarctica and Sri Lanka. Cores of detrital zircon grains with high Th/U ratio in eight metasediment samples can be subdivided into two dominant groups: (1) late Meso- to Neoproterozoic (1.1–0.63 Ga) zircons from the northeastern part of the LHC in Prince Olav Coast and northern Sôya Coast areas, and (2) dominantly Neoarchean to Paleoproterozoic (2.8–2.4 Ga) zircons from the southwestern part of the LHC in southern Lützow-Holm Bay area. The ca. 1.0 Ga and ca. 2.5 Ga magmatic suites in the LHC could be proximal provenances of the detrital zircons in the northeastern and southwestern LHC, respectively. Subordinate middle to late Mesoproterozoic (1.3–1.2 Ga) detrital zircons obtained from Akarui Point and Langhovde could have been derived from adjacent Gondwana fragments (e.g., Rayner Complex, Eastern Ghats Belt). Meso- to Neoproterozoic domains such as Vijayan and Wanni Complexes of Sri Lanka, the southern Madurai Block of southern India, and the central-western Madagascar could be alternative distal sources of the late Meso- to Neoproterozoic zircons. Paleo- to Mesoarchean domains in India, Africa, and Antarctica might also be distal sources for the minor ∼2.8 Ga detrital zircons from Skallevikshalsen. The detrital zircons from the Highland Complex of Sri Lanka show similar Neoarchean to Paleoproterozoic (ca. 2.5 Ga) and Neoproterozoic (ca. 1.0 Ga) ages, which are comparable with those of the LHC, suggesting that the two complexes might have formed under similar tectonic ... |
format |
Article in Journal/Newspaper |
author |
Takamura, Y. Tsunogae, T. Santosh, M. Tsutsumi, Y. |
author_facet |
Takamura, Y. Tsunogae, T. Santosh, M. Tsutsumi, Y. |
author_sort |
Takamura, Y. |
title |
Detrital zircon geochronology of the Lützow-Holm Complex, East Antarctica: implications for Antarctica-Sri Lanka correlation |
title_short |
Detrital zircon geochronology of the Lützow-Holm Complex, East Antarctica: implications for Antarctica-Sri Lanka correlation |
title_full |
Detrital zircon geochronology of the Lützow-Holm Complex, East Antarctica: implications for Antarctica-Sri Lanka correlation |
title_fullStr |
Detrital zircon geochronology of the Lützow-Holm Complex, East Antarctica: implications for Antarctica-Sri Lanka correlation |
title_full_unstemmed |
Detrital zircon geochronology of the Lützow-Holm Complex, East Antarctica: implications for Antarctica-Sri Lanka correlation |
title_sort |
detrital zircon geochronology of the lützow-holm complex, east antarctica: implications for antarctica-sri lanka correlation |
publisher |
Elsevier |
publishDate |
2018 |
url |
http://hdl.handle.net/2440/116558 https://doi.org/10.1016/j.gsf.2017.08.006 |
long_lat |
ENVELOPE(39.733,39.733,-69.217,-69.217) ENVELOPE(38.000,38.000,-69.500,-69.500) ENVELOPE(41.000,41.000,-69.000,-69.000) ENVELOPE(-45.166,-45.166,-60.650,-60.650) ENVELOPE(39.333,39.333,-69.692,-69.692) ENVELOPE(39.750,39.750,-69.300,-69.300) |
geographic |
East Antarctica Langhovde Lützow-Holm Bay Prince Olav Coast Rayner Skallevikshalsen Sôya Coast |
geographic_facet |
East Antarctica Langhovde Lützow-Holm Bay Prince Olav Coast Rayner Skallevikshalsen Sôya Coast |
genre |
Antarc* Antarctica East Antarctica Prince Olav Coast |
genre_facet |
Antarc* Antarctica East Antarctica Prince Olav Coast |
op_source |
http://dx.doi.org/10.1016/j.gsf.2017.08.006 |
op_relation |
Geoscience Frontiers, 2018; 9(2):355-375 1674-9871 http://hdl.handle.net/2440/116558 doi:10.1016/j.gsf.2017.08.006 Santosh, M. [0000-0002-1073-8477] |
op_rights |
© 2018 China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
op_doi |
https://doi.org/10.1016/j.gsf.2017.08.006 |
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Geoscience Frontiers |
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9 |
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2 |
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355 |
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375 |
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1785586667456823296 |