Reconstruction of a Ross lost Cambrian Series 2mixed siliciclastic–carbonate platform from carbonate clasts of the Shackleton Range, Antarctica
ABSTRACT The presence of archaeocyath-bearing clasts from Cenozoic tills and Cambrian Mount Wegener Formation reveal erosion of a hidden Cambrian carbonate platform in Shackleton Range, Antarctica. We provide microfacies, paleontological, diagenetic and tectonically induced fabric data from carbonat...
Published in: | Earth and Environmental Science Transactions of the Royal Society of Edinburgh |
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/s1755691022000111 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1755691022000111 |
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crcambridgeupr:10.1017/s1755691022000111 2024-09-15T17:46:07+00:00 Reconstruction of a Ross lost Cambrian Series 2mixed siliciclastic–carbonate platform from carbonate clasts of the Shackleton Range, Antarctica RODRÍGUEZ-MARTÍNEZ, Marta BUGGISCH, Werner MENÉNDEZ, Silvia MORENO-EIRIS, Elena PEREJÓN, Antonio 2022 http://dx.doi.org/10.1017/s1755691022000111 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1755691022000111 en eng Cambridge University Press (CUP) https://creativecommons.org/licenses/by/4.0/ Earth and Environmental Science Transactions of the Royal Society of Edinburgh volume 113, issue 3, page 175-226 ISSN 1755-6910 1755-6929 journal-article 2022 crcambridgeupr https://doi.org/10.1017/s1755691022000111 2024-07-31T04:04:36Z ABSTRACT The presence of archaeocyath-bearing clasts from Cenozoic tills and Cambrian Mount Wegener Formation reveal erosion of a hidden Cambrian carbonate platform in Shackleton Range, Antarctica. We provide microfacies, paleontological, diagenetic and tectonically induced fabric data from carbonate clasts which, in addition to available geochemical and geochronological data from Shackleton Range, allow the paleoenvironmental reconstruction of a lost Cambrian Series 2 mixed siliciclastic–carbonate platform that was developed and eroded during the Ross orogeny. Carbonate production was dominated by non-skeletal grains in possibly restricted platform-interior and oolitic shoal complex settings, while open subtidal sub-environments (calcimicrobe carpets, calcimicrobe–archaeocyath patch reefs, muddy bottoms) were dominated by a diverse calcimicrobe assemblage and/or by secondary to accessory heterozoan assemblage (archaeocyaths and other sponges, chancelloriids, hyoliths, coralomorphs, trilobites, echinoderms). We describe a Botoman assemblage with 34 archaeocyathan species among 12 existing archaeocyathan genera. A new archaeocyath family Shackletoncyathidae is proposed. New species ( Rotundocyathus glacius sp. nov., Buggischicyathus microporus gen. et sp. nov., Paragnaltacyathus hoeflei , Shackletoncyathus buggischi gen. et. sp. nov., Santelmocyathus santelmoi gen. et sp. nov., Wegenercyathus sexangulae gen. et sp. nov.) and Tabulaconus kordae coralomorph are reported from Antarctica for the first time. Archaeocyathan fauna share few species with contemporary fauna of South Australia (9) and even fewer with the Antarctic platforms of the Shackleton Limestone (2) or the Schneider Hills limestone (1). Similarity is greater with Antarctic allochthonous assemblages of Permo-Carboniferous tillites from Ellsworth Mountains (2), Cenozoic deposits from King George Island (4) or Weddell Sea (1). The Shackleton Range lost/hidden platform shows a distinct entity related with its tectonosedimentary evolution, in a possible ... Article in Journal/Newspaper Antarc* Antarctic Antarctica King George Island Weddell Sea Cambridge University Press Earth and Environmental Science Transactions of the Royal Society of Edinburgh 1 52 |
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Cambridge University Press |
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crcambridgeupr |
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English |
description |
ABSTRACT The presence of archaeocyath-bearing clasts from Cenozoic tills and Cambrian Mount Wegener Formation reveal erosion of a hidden Cambrian carbonate platform in Shackleton Range, Antarctica. We provide microfacies, paleontological, diagenetic and tectonically induced fabric data from carbonate clasts which, in addition to available geochemical and geochronological data from Shackleton Range, allow the paleoenvironmental reconstruction of a lost Cambrian Series 2 mixed siliciclastic–carbonate platform that was developed and eroded during the Ross orogeny. Carbonate production was dominated by non-skeletal grains in possibly restricted platform-interior and oolitic shoal complex settings, while open subtidal sub-environments (calcimicrobe carpets, calcimicrobe–archaeocyath patch reefs, muddy bottoms) were dominated by a diverse calcimicrobe assemblage and/or by secondary to accessory heterozoan assemblage (archaeocyaths and other sponges, chancelloriids, hyoliths, coralomorphs, trilobites, echinoderms). We describe a Botoman assemblage with 34 archaeocyathan species among 12 existing archaeocyathan genera. A new archaeocyath family Shackletoncyathidae is proposed. New species ( Rotundocyathus glacius sp. nov., Buggischicyathus microporus gen. et sp. nov., Paragnaltacyathus hoeflei , Shackletoncyathus buggischi gen. et. sp. nov., Santelmocyathus santelmoi gen. et sp. nov., Wegenercyathus sexangulae gen. et sp. nov.) and Tabulaconus kordae coralomorph are reported from Antarctica for the first time. Archaeocyathan fauna share few species with contemporary fauna of South Australia (9) and even fewer with the Antarctic platforms of the Shackleton Limestone (2) or the Schneider Hills limestone (1). Similarity is greater with Antarctic allochthonous assemblages of Permo-Carboniferous tillites from Ellsworth Mountains (2), Cenozoic deposits from King George Island (4) or Weddell Sea (1). The Shackleton Range lost/hidden platform shows a distinct entity related with its tectonosedimentary evolution, in a possible ... |
format |
Article in Journal/Newspaper |
author |
RODRÍGUEZ-MARTÍNEZ, Marta BUGGISCH, Werner MENÉNDEZ, Silvia MORENO-EIRIS, Elena PEREJÓN, Antonio |
spellingShingle |
RODRÍGUEZ-MARTÍNEZ, Marta BUGGISCH, Werner MENÉNDEZ, Silvia MORENO-EIRIS, Elena PEREJÓN, Antonio Reconstruction of a Ross lost Cambrian Series 2mixed siliciclastic–carbonate platform from carbonate clasts of the Shackleton Range, Antarctica |
author_facet |
RODRÍGUEZ-MARTÍNEZ, Marta BUGGISCH, Werner MENÉNDEZ, Silvia MORENO-EIRIS, Elena PEREJÓN, Antonio |
author_sort |
RODRÍGUEZ-MARTÍNEZ, Marta |
title |
Reconstruction of a Ross lost Cambrian Series 2mixed siliciclastic–carbonate platform from carbonate clasts of the Shackleton Range, Antarctica |
title_short |
Reconstruction of a Ross lost Cambrian Series 2mixed siliciclastic–carbonate platform from carbonate clasts of the Shackleton Range, Antarctica |
title_full |
Reconstruction of a Ross lost Cambrian Series 2mixed siliciclastic–carbonate platform from carbonate clasts of the Shackleton Range, Antarctica |
title_fullStr |
Reconstruction of a Ross lost Cambrian Series 2mixed siliciclastic–carbonate platform from carbonate clasts of the Shackleton Range, Antarctica |
title_full_unstemmed |
Reconstruction of a Ross lost Cambrian Series 2mixed siliciclastic–carbonate platform from carbonate clasts of the Shackleton Range, Antarctica |
title_sort |
reconstruction of a ross lost cambrian series 2mixed siliciclastic–carbonate platform from carbonate clasts of the shackleton range, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1017/s1755691022000111 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1755691022000111 |
genre |
Antarc* Antarctic Antarctica King George Island Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica King George Island Weddell Sea |
op_source |
Earth and Environmental Science Transactions of the Royal Society of Edinburgh volume 113, issue 3, page 175-226 ISSN 1755-6910 1755-6929 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/s1755691022000111 |
container_title |
Earth and Environmental Science Transactions of the Royal Society of Edinburgh |
container_start_page |
1 |
op_container_end_page |
52 |
_version_ |
1810494095709175808 |