Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica: evidence from SHRIMP U-Pb ages of detrital and plutonic zircons
Detrital zircon populations from two sandstone samples from the lower member (Johnsons Dock Member) of the Miers Bluff Formation at Hurd Peninsula have been dated by the Sensitive High Resolution Ion Microprobe (SHRIMP) U-Pb method. In one of the samples, zircons as young as early Middle Jurassic (B...
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/24032 2023-05-15T13:56:14+02:00 Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica: evidence from SHRIMP U-Pb ages of detrital and plutonic zircons Herve, Francisco Faundez, Victor Brix, Manfred Fanning, Christopher 2015-12-07T22:40:48Z http://hdl.handle.net/1885/24032 unknown British Antarctic Survey 0954-1020 http://hdl.handle.net/1885/24032 Antarctic Science Keywords: Bajocian chronology detrital deposit Jurassic Paleozoic sandstone sedimentation SHRIMP dating tectonic setting Triassic Valanginian zircon Antarctic Peninsula Antarctica Livingston Island South Shetland Islands West Antarctica Rumex Detrital zircon age spectra Early Cretaceous plutonism Hurd Peninsula Journal article 2015 ftanucanberra 2015-12-28T23:20:49Z Detrital zircon populations from two sandstone samples from the lower member (Johnsons Dock Member) of the Miers Bluff Formation at Hurd Peninsula have been dated by the Sensitive High Resolution Ion Microprobe (SHRIMP) U-Pb method. In one of the samples, zircons as young as early Middle Jurassic (Bajocian) age are present. In the second sample, the youngest detrital zircons are Middle Triassic in age. The detrital zircon age spectra indicate that Permian, early Palaeozoic and Meso- to Neoproterozoic zircon bearing rocks were present in the source areas of the Miers Bluff Formation. The sedimentary rocks are intruded by the Hespérides Point Intrusive diorite stock which yielded a U-Pb zircon crystallization age of 137.7 ± 1.4 Ma (Early Cretaceous, Valanginian). These results indicate that sedimentation of the Johnsons Dock Member of the Miers Bluff Formation is bracketed in time between the Bajocian and the Valanginian. The Miers Bluff Formation has been correlated with the Trinity Peninsula Group from the Antarctic Peninsula, based on sedimentological and structural similarity. Since the Trinity Peninsula Group is older than Middle Jurassic a direct chronological correlation is not supported by our new U-Pb zircon data. However, we suggest that the tectonic setting may have migrated in time with deposition of the pre-Middle Jurassic TPG on the peninsula, to Livingston Island where the maximum age for deposition of the MBF is Bajocian (about 170 Ma). Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica Livingston Island South Shetland Islands West Antarctica Australian National University: ANU Digital Collections Antarctic The Antarctic Antarctic Peninsula West Antarctica South Shetland Islands Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Miers ENVELOPE(163.850,163.850,-78.100,-78.100) Hurd ENVELOPE(-60.366,-60.366,-62.682,-62.682) Johnsons ENVELOPE(-60.350,-60.350,-62.665,-62.665) Trinity Peninsula ENVELOPE(-58.000,-58.000,-63.500,-63.500) Hurd peninsula ENVELOPE(-60.366,-60.366,-62.676,-62.676) Miers Bluff ENVELOPE(-60.438,-60.438,-62.720,-62.720) Johnsons Dock ENVELOPE(-60.368,-60.368,-62.660,-62.660) Hespérides Point ENVELOPE(-60.373,-60.373,-62.644,-62.644) |
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Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Bajocian chronology detrital deposit Jurassic Paleozoic sandstone sedimentation SHRIMP dating tectonic setting Triassic Valanginian zircon Antarctic Peninsula Antarctica Livingston Island South Shetland Islands West Antarctica Rumex Detrital zircon age spectra Early Cretaceous plutonism Hurd Peninsula |
spellingShingle |
Keywords: Bajocian chronology detrital deposit Jurassic Paleozoic sandstone sedimentation SHRIMP dating tectonic setting Triassic Valanginian zircon Antarctic Peninsula Antarctica Livingston Island South Shetland Islands West Antarctica Rumex Detrital zircon age spectra Early Cretaceous plutonism Hurd Peninsula Herve, Francisco Faundez, Victor Brix, Manfred Fanning, Christopher Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica: evidence from SHRIMP U-Pb ages of detrital and plutonic zircons |
topic_facet |
Keywords: Bajocian chronology detrital deposit Jurassic Paleozoic sandstone sedimentation SHRIMP dating tectonic setting Triassic Valanginian zircon Antarctic Peninsula Antarctica Livingston Island South Shetland Islands West Antarctica Rumex Detrital zircon age spectra Early Cretaceous plutonism Hurd Peninsula |
description |
Detrital zircon populations from two sandstone samples from the lower member (Johnsons Dock Member) of the Miers Bluff Formation at Hurd Peninsula have been dated by the Sensitive High Resolution Ion Microprobe (SHRIMP) U-Pb method. In one of the samples, zircons as young as early Middle Jurassic (Bajocian) age are present. In the second sample, the youngest detrital zircons are Middle Triassic in age. The detrital zircon age spectra indicate that Permian, early Palaeozoic and Meso- to Neoproterozoic zircon bearing rocks were present in the source areas of the Miers Bluff Formation. The sedimentary rocks are intruded by the Hespérides Point Intrusive diorite stock which yielded a U-Pb zircon crystallization age of 137.7 ± 1.4 Ma (Early Cretaceous, Valanginian). These results indicate that sedimentation of the Johnsons Dock Member of the Miers Bluff Formation is bracketed in time between the Bajocian and the Valanginian. The Miers Bluff Formation has been correlated with the Trinity Peninsula Group from the Antarctic Peninsula, based on sedimentological and structural similarity. Since the Trinity Peninsula Group is older than Middle Jurassic a direct chronological correlation is not supported by our new U-Pb zircon data. However, we suggest that the tectonic setting may have migrated in time with deposition of the pre-Middle Jurassic TPG on the peninsula, to Livingston Island where the maximum age for deposition of the MBF is Bajocian (about 170 Ma). |
format |
Article in Journal/Newspaper |
author |
Herve, Francisco Faundez, Victor Brix, Manfred Fanning, Christopher |
author_facet |
Herve, Francisco Faundez, Victor Brix, Manfred Fanning, Christopher |
author_sort |
Herve, Francisco |
title |
Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica: evidence from SHRIMP U-Pb ages of detrital and plutonic zircons |
title_short |
Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica: evidence from SHRIMP U-Pb ages of detrital and plutonic zircons |
title_full |
Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica: evidence from SHRIMP U-Pb ages of detrital and plutonic zircons |
title_fullStr |
Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica: evidence from SHRIMP U-Pb ages of detrital and plutonic zircons |
title_full_unstemmed |
Jurassic sedimentation of the Miers Bluff Formation, Livingston Island, Antarctica: evidence from SHRIMP U-Pb ages of detrital and plutonic zircons |
title_sort |
jurassic sedimentation of the miers bluff formation, livingston island, antarctica: evidence from shrimp u-pb ages of detrital and plutonic zircons |
publisher |
British Antarctic Survey |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/24032 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(163.850,163.850,-78.100,-78.100) ENVELOPE(-60.366,-60.366,-62.682,-62.682) ENVELOPE(-60.350,-60.350,-62.665,-62.665) ENVELOPE(-58.000,-58.000,-63.500,-63.500) ENVELOPE(-60.366,-60.366,-62.676,-62.676) ENVELOPE(-60.438,-60.438,-62.720,-62.720) ENVELOPE(-60.368,-60.368,-62.660,-62.660) ENVELOPE(-60.373,-60.373,-62.644,-62.644) |
geographic |
Antarctic The Antarctic Antarctic Peninsula West Antarctica South Shetland Islands Livingston Island Miers Hurd Johnsons Trinity Peninsula Hurd peninsula Miers Bluff Johnsons Dock Hespérides Point |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula West Antarctica South Shetland Islands Livingston Island Miers Hurd Johnsons Trinity Peninsula Hurd peninsula Miers Bluff Johnsons Dock Hespérides Point |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica Livingston Island South Shetland Islands West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica Livingston Island South Shetland Islands West Antarctica |
op_source |
Antarctic Science |
op_relation |
0954-1020 http://hdl.handle.net/1885/24032 |
_version_ |
1766263608824561664 |