A palaeomagnetic survey of South American rock formations - Palaeomagnetic studies on rock formations from Northwest Argentina
Cambrian, Cambro-Ordovician and Ordovician formations of red sandstones and siltstones from the sub-Andean regionso f the Provinces of Salta and Jujuy have been studied. The grouping of n.r.m . directions suggests partial remagnetization after folding in the Tertiary or Quaternary geomagnetic field....
Published in: | Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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The Royal Society
1970
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Online Access: | http://dx.doi.org/10.1098/rsta.1970.0053 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.1970.0053 |
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crroyalsociety:10.1098/rsta.1970.0053 2024-06-02T08:14:35+00:00 A palaeomagnetic survey of South American rock formations - Palaeomagnetic studies on rock formations from Northwest Argentina 1970 http://dx.doi.org/10.1098/rsta.1970.0053 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.1970.0053 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences volume 267, issue 1183, page 481-501 ISSN 0080-4614 2054-0272 journal-article 1970 crroyalsociety https://doi.org/10.1098/rsta.1970.0053 2024-05-07T14:16:02Z Cambrian, Cambro-Ordovician and Ordovician formations of red sandstones and siltstones from the sub-Andean regionso f the Provinces of Salta and Jujuy have been studied. The grouping of n.r.m . directions suggests partial remagnetization after folding in the Tertiary or Quaternary geomagnetic field. Thermal cleaning at 300 °C and higher temperatures destroys this secondary magnetization leaving a magnetization which is accepted as representing the lower Palaeozoic geomagnetic field. Palaeomagnetic south pole positions have been computed and lie in the Atlantic Ocean to the NNE of Brazil. The period between the Carboniferous and Triassic is covered by the Paganzo formation which is exposed in La Rioja Province. The older part (Paganzo II) is reversely magnetized with a south p.m . pole in the South Atlantic, while the upper part (Paganzo III) is normally magnetized with a south palaeomagnetic pole in the vicinity of poles obtained for Triassic rock formations from elsewhere in S. America. Formations of red beds from Salta province regarded as Upper Palaeozoic or Mesozoic yield a south palaeomagnetic pole in the South Atlantic corresponding to a Triassic age. Ore microscope and thermal decay curves suggest that the remanent magnetism is due to haematite. Article in Journal/Newspaper South pole The Royal Society American Rock ENVELOPE(-55.731,-55.731,53.300,53.300) Argentina South Pole Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences 267 1183 481 501 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Cambrian, Cambro-Ordovician and Ordovician formations of red sandstones and siltstones from the sub-Andean regionso f the Provinces of Salta and Jujuy have been studied. The grouping of n.r.m . directions suggests partial remagnetization after folding in the Tertiary or Quaternary geomagnetic field. Thermal cleaning at 300 °C and higher temperatures destroys this secondary magnetization leaving a magnetization which is accepted as representing the lower Palaeozoic geomagnetic field. Palaeomagnetic south pole positions have been computed and lie in the Atlantic Ocean to the NNE of Brazil. The period between the Carboniferous and Triassic is covered by the Paganzo formation which is exposed in La Rioja Province. The older part (Paganzo II) is reversely magnetized with a south p.m . pole in the South Atlantic, while the upper part (Paganzo III) is normally magnetized with a south palaeomagnetic pole in the vicinity of poles obtained for Triassic rock formations from elsewhere in S. America. Formations of red beds from Salta province regarded as Upper Palaeozoic or Mesozoic yield a south palaeomagnetic pole in the South Atlantic corresponding to a Triassic age. Ore microscope and thermal decay curves suggest that the remanent magnetism is due to haematite. |
format |
Article in Journal/Newspaper |
title |
A palaeomagnetic survey of South American rock formations - Palaeomagnetic studies on rock formations from Northwest Argentina |
spellingShingle |
A palaeomagnetic survey of South American rock formations - Palaeomagnetic studies on rock formations from Northwest Argentina |
title_short |
A palaeomagnetic survey of South American rock formations - Palaeomagnetic studies on rock formations from Northwest Argentina |
title_full |
A palaeomagnetic survey of South American rock formations - Palaeomagnetic studies on rock formations from Northwest Argentina |
title_fullStr |
A palaeomagnetic survey of South American rock formations - Palaeomagnetic studies on rock formations from Northwest Argentina |
title_full_unstemmed |
A palaeomagnetic survey of South American rock formations - Palaeomagnetic studies on rock formations from Northwest Argentina |
title_sort |
palaeomagnetic survey of south american rock formations - palaeomagnetic studies on rock formations from northwest argentina |
publisher |
The Royal Society |
publishDate |
1970 |
url |
http://dx.doi.org/10.1098/rsta.1970.0053 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.1970.0053 |
long_lat |
ENVELOPE(-55.731,-55.731,53.300,53.300) |
geographic |
American Rock Argentina South Pole |
geographic_facet |
American Rock Argentina South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences volume 267, issue 1183, page 481-501 ISSN 0080-4614 2054-0272 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsta.1970.0053 |
container_title |
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences |
container_volume |
267 |
container_issue |
1183 |
container_start_page |
481 |
op_container_end_page |
501 |
_version_ |
1800738494520229888 |