Carbonate production and reef building under ferruginous seawater conditions in the Cambrian rift branches of the Avalon Zone, Newfoundland
The characterization of carbonate production on rift basins is critical for understanding the nucleation and demise of reefs in tectonically active areas. A new petrographic and mineralogical analysis of Cambrian strata from the Avalon Zone in Newfoundland, based on scanning electron microscopy – ba...
Published in: | Sedimentology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2024
|
Subjects: | |
Online Access: | https://hdl.handle.net/20.500.14352/104288 https://doi.org/10.1111/sed.13172 |
id |
ftunivcmadrid:oai:docta.ucm.es:20.500.14352/104288 |
---|---|
record_format |
openpolar |
spelling |
ftunivcmadrid:oai:docta.ucm.es:20.500.14352/104288 2024-06-23T07:54:45+00:00 Carbonate production and reef building under ferruginous seawater conditions in the Cambrian rift branches of the Avalon Zone, Newfoundland Álvaro, J.J. Mills, Andrea 2024-06 application/pdf https://hdl.handle.net/20.500.14352/104288 https://doi.org/10.1111/sed.13172 eng eng Wiley PID2021-125585NB-I00 https://hdl.handle.net/20.500.14352/104288 Álvaro, José Javier, y Andrea Mills. «Carbonate Production and Reef Building under Ferruginous Seawater Conditions in the Cambrian Rift Branches of the Avalon Zone, Newfoundland». Sedimentology, vol. 71, n.o 4, junio de 2024, pp. 1245-69 doi:10.1111/sed.13172 1365-3091 https://doi.org/10.1111/sed.13172 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ open access 551.732(718) 551.351.3(718) Avalonia Cambrian Chamosite Mud-mound Phosphorite Geología estratigráfica 2506.19 Estratigrafía journal article VoR 2024 ftunivcmadrid https://doi.org/20.500.14352/10428810.1111/sed.13172 2024-05-29T01:04:51Z The characterization of carbonate production on rift basins is critical for understanding the nucleation and demise of reefs in tectonically active areas. A new petrographic and mineralogical analysis of Cambrian strata from the Avalon Zone in Newfoundland, based on scanning electron microscopy – back-scattered electron detector and Raman spectrometer analyses, facilitates recognition of several episodes of Terreneuvian–Miaolingian carbonate production and associated precipitation of ironstone and phosphorite. These distinct units mainly developed on uplifted rift shoulders and basaltic lava palaeoreliefs, and reflect amalgamated high-energy events, interrupted by scouring discontinuities (diastems) commonly lined by phosphatized and ferruginized microbial crusts. Mud-mounds, in contrast, nucleated under calm conditions episodically punctuated by high-energy episodes, where scattered thromboid structures occur as both clotted textures and distinct calcimicrobes. Precipitation of hematite/goethite versus chamosite couplets, both occluding primary porosities and replacing interlaminae and cortices of oncoids and coated aggregates, point to marine substrates close to the Fe-redox boundary. Upwelling of phosphate-rich ferruginous hydrothermal waters contributed to the precipitation of ironstone and phosphate interbeds. Ferruginous waters related to penecontemporaneous hydrothermal activity, reflected by the record of synsedimentary fissuring and stockwork ore bodies, were delivered to confined rift-related horst-and-graben settings, largely controlled by the development of specific Cambrian carbonate and associated ironstone facies. The influence of ferruginous waters necessarily affected the record of climatically sensitive evaporitic pseudomorphs, reefs/mounds and phosphorites, which are then not suitable criteria to discriminate palaeolatitude, as demonstrated by a comparison of low-latitude to middle-latitude margins fringing Baltica, and the Avalonian and Atlas – Ossa-Morena – Northarmorican rift transects of ... Article in Journal/Newspaper Newfoundland Docta Complutense (Universidad Complutense de Madrid - UCM) Morena ENVELOPE(-67.121,-67.121,-68.580,-68.580) Sedimentology 71 4 1245 1269 |
institution |
Open Polar |
collection |
Docta Complutense (Universidad Complutense de Madrid - UCM) |
op_collection_id |
ftunivcmadrid |
language |
English |
topic |
551.732(718) 551.351.3(718) Avalonia Cambrian Chamosite Mud-mound Phosphorite Geología estratigráfica 2506.19 Estratigrafía |
spellingShingle |
551.732(718) 551.351.3(718) Avalonia Cambrian Chamosite Mud-mound Phosphorite Geología estratigráfica 2506.19 Estratigrafía Álvaro, J.J. Mills, Andrea Carbonate production and reef building under ferruginous seawater conditions in the Cambrian rift branches of the Avalon Zone, Newfoundland |
topic_facet |
551.732(718) 551.351.3(718) Avalonia Cambrian Chamosite Mud-mound Phosphorite Geología estratigráfica 2506.19 Estratigrafía |
description |
The characterization of carbonate production on rift basins is critical for understanding the nucleation and demise of reefs in tectonically active areas. A new petrographic and mineralogical analysis of Cambrian strata from the Avalon Zone in Newfoundland, based on scanning electron microscopy – back-scattered electron detector and Raman spectrometer analyses, facilitates recognition of several episodes of Terreneuvian–Miaolingian carbonate production and associated precipitation of ironstone and phosphorite. These distinct units mainly developed on uplifted rift shoulders and basaltic lava palaeoreliefs, and reflect amalgamated high-energy events, interrupted by scouring discontinuities (diastems) commonly lined by phosphatized and ferruginized microbial crusts. Mud-mounds, in contrast, nucleated under calm conditions episodically punctuated by high-energy episodes, where scattered thromboid structures occur as both clotted textures and distinct calcimicrobes. Precipitation of hematite/goethite versus chamosite couplets, both occluding primary porosities and replacing interlaminae and cortices of oncoids and coated aggregates, point to marine substrates close to the Fe-redox boundary. Upwelling of phosphate-rich ferruginous hydrothermal waters contributed to the precipitation of ironstone and phosphate interbeds. Ferruginous waters related to penecontemporaneous hydrothermal activity, reflected by the record of synsedimentary fissuring and stockwork ore bodies, were delivered to confined rift-related horst-and-graben settings, largely controlled by the development of specific Cambrian carbonate and associated ironstone facies. The influence of ferruginous waters necessarily affected the record of climatically sensitive evaporitic pseudomorphs, reefs/mounds and phosphorites, which are then not suitable criteria to discriminate palaeolatitude, as demonstrated by a comparison of low-latitude to middle-latitude margins fringing Baltica, and the Avalonian and Atlas – Ossa-Morena – Northarmorican rift transects of ... |
format |
Article in Journal/Newspaper |
author |
Álvaro, J.J. Mills, Andrea |
author_facet |
Álvaro, J.J. Mills, Andrea |
author_sort |
Álvaro, J.J. |
title |
Carbonate production and reef building under ferruginous seawater conditions in the Cambrian rift branches of the Avalon Zone, Newfoundland |
title_short |
Carbonate production and reef building under ferruginous seawater conditions in the Cambrian rift branches of the Avalon Zone, Newfoundland |
title_full |
Carbonate production and reef building under ferruginous seawater conditions in the Cambrian rift branches of the Avalon Zone, Newfoundland |
title_fullStr |
Carbonate production and reef building under ferruginous seawater conditions in the Cambrian rift branches of the Avalon Zone, Newfoundland |
title_full_unstemmed |
Carbonate production and reef building under ferruginous seawater conditions in the Cambrian rift branches of the Avalon Zone, Newfoundland |
title_sort |
carbonate production and reef building under ferruginous seawater conditions in the cambrian rift branches of the avalon zone, newfoundland |
publisher |
Wiley |
publishDate |
2024 |
url |
https://hdl.handle.net/20.500.14352/104288 https://doi.org/10.1111/sed.13172 |
long_lat |
ENVELOPE(-67.121,-67.121,-68.580,-68.580) |
geographic |
Morena |
geographic_facet |
Morena |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
PID2021-125585NB-I00 https://hdl.handle.net/20.500.14352/104288 Álvaro, José Javier, y Andrea Mills. «Carbonate Production and Reef Building under Ferruginous Seawater Conditions in the Cambrian Rift Branches of the Avalon Zone, Newfoundland». Sedimentology, vol. 71, n.o 4, junio de 2024, pp. 1245-69 doi:10.1111/sed.13172 1365-3091 https://doi.org/10.1111/sed.13172 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ open access |
op_doi |
https://doi.org/20.500.14352/10428810.1111/sed.13172 |
container_title |
Sedimentology |
container_volume |
71 |
container_issue |
4 |
container_start_page |
1245 |
op_container_end_page |
1269 |
_version_ |
1802647020543934464 |