Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula
Aeromagnetic data for Palmer Land provide new information on crustal structures of the Antarctic Peninsula. Features shown on the compilation of the Lassiter Coast and Orville Coast are characterized by systems of subparallel regional anomaly zones and lineaments. The magnetic data reveal the widesp...
Published in: | Annals of Geophysics |
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Language: | English |
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2000
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Online Access: | https://doi.org/10.4401/ag-3649 https://doaj.org/article/a18349460f6f4d7c8dca50c05a921adc |
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ftdoajarticles:oai:doaj.org/article:a18349460f6f4d7c8dca50c05a921adc 2023-05-15T13:34:21+02:00 Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula V. N. Masolov A. V. Golynsky 2000-06-01T00:00:00Z https://doi.org/10.4401/ag-3649 https://doaj.org/article/a18349460f6f4d7c8dca50c05a921adc EN eng Istituto Nazionale di Geofisica e Vulcanologia (INGV) http://www.annalsofgeophysics.eu/index.php/annals/article/view/3649 https://doaj.org/toc/1593-5213 https://doaj.org/toc/2037-416X doi:10.4401/ag-3649 1593-5213 2037-416X https://doaj.org/article/a18349460f6f4d7c8dca50c05a921adc Annals of Geophysics, Vol 43, Iss 2 (2000) aeromagnetic survey batholoth magnetic anomalies modelling Palmer Land susceptibility Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 article 2000 ftdoajarticles https://doi.org/10.4401/ag-3649 2022-12-31T05:33:12Z Aeromagnetic data for Palmer Land provide new information on crustal structures of the Antarctic Peninsula. Features shown on the compilation of the Lassiter Coast and Orville Coast are characterized by systems of subparallel regional anomaly zones and lineaments. The magnetic data reveal the widespread presence of an orthogonal pattern of crosscutting linear discontinuities that can be interpreted as a Late Cretaceous/Early Tertiary fracture pattern. The main displacements in the anomaly pattern between the two units are recognized in Wetmore-Irvine glaciers area where the structure of the Antarctic Peninsula changes orientation from SW-NE to S-N. The NW-SE trending transitional zone is probably a transfer zone associated with north-westerly movement of the Lassiter Coast crustal segment relative to the Orville Coast segment. Within the Lassiter Coast a fragment of Pacific Margin Anomaly (PMA), Central Plateau Magnetic Anomaly and East Coast Magnetic Anomaly (ECMA) are mapped. Two-dimensional modelling suggests that PMA is caused by a limited depth body (8 km) consisting of numerous plutons, probably, of different ages, composition and magnetization. The Central Plateau Magnetic Anomaly and the Merrick-Sweeney-Latady zone of the Orville Coast are represented by strong positive anomaly bands that are associated with gabbro-diorite rocks and accompanying plutons intruded near by the border of Mount Poster Formation and Latady Formation. The ECMA are alignments of high-amplitude magnetic anomalies caused by gabbro-diorite bodies, which are located within the framework of the Cretaceous granite-granodiorite plutons. Granite-granodiorite plutons of Lassiter Coast Intrusive Suite are mostly reflected by positive anomalies (100-500 nT). Modelling studies and the character of distribution of the magnetic anomalies suggest that the plutons of Lassiter Coast Intrusive Suite are prominently reflected in magnetic anomalies of regional extent. The plutonic activities during the geological evolution of Palmer Land have been ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Palmer Land Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula Lassiter ENVELOPE(-62.000,-62.000,-73.750,-73.750) Lassiter Coast ENVELOPE(-62.000,-62.000,-74.000,-74.000) Latady ENVELOPE(-65.833,-65.833,-75.500,-75.500) Merrick ENVELOPE(49.300,49.300,-67.700,-67.700) Mount Poster ENVELOPE(-65.652,-65.652,-74.688,-74.688) Orville ENVELOPE(-63.000,-63.000,-75.167,-75.167) Orville Coast ENVELOPE(-65.500,-65.500,-75.750,-75.750) Pacific Palmer Land ENVELOPE(-65.000,-65.000,-71.500,-71.500) The Antarctic Wetmore ENVELOPE(-63.583,-63.583,-74.633,-74.633) Annals of Geophysics 43 2 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
aeromagnetic survey batholoth magnetic anomalies modelling Palmer Land susceptibility Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
aeromagnetic survey batholoth magnetic anomalies modelling Palmer Land susceptibility Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 V. N. Masolov A. V. Golynsky Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula |
topic_facet |
aeromagnetic survey batholoth magnetic anomalies modelling Palmer Land susceptibility Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
description |
Aeromagnetic data for Palmer Land provide new information on crustal structures of the Antarctic Peninsula. Features shown on the compilation of the Lassiter Coast and Orville Coast are characterized by systems of subparallel regional anomaly zones and lineaments. The magnetic data reveal the widespread presence of an orthogonal pattern of crosscutting linear discontinuities that can be interpreted as a Late Cretaceous/Early Tertiary fracture pattern. The main displacements in the anomaly pattern between the two units are recognized in Wetmore-Irvine glaciers area where the structure of the Antarctic Peninsula changes orientation from SW-NE to S-N. The NW-SE trending transitional zone is probably a transfer zone associated with north-westerly movement of the Lassiter Coast crustal segment relative to the Orville Coast segment. Within the Lassiter Coast a fragment of Pacific Margin Anomaly (PMA), Central Plateau Magnetic Anomaly and East Coast Magnetic Anomaly (ECMA) are mapped. Two-dimensional modelling suggests that PMA is caused by a limited depth body (8 km) consisting of numerous plutons, probably, of different ages, composition and magnetization. The Central Plateau Magnetic Anomaly and the Merrick-Sweeney-Latady zone of the Orville Coast are represented by strong positive anomaly bands that are associated with gabbro-diorite rocks and accompanying plutons intruded near by the border of Mount Poster Formation and Latady Formation. The ECMA are alignments of high-amplitude magnetic anomalies caused by gabbro-diorite bodies, which are located within the framework of the Cretaceous granite-granodiorite plutons. Granite-granodiorite plutons of Lassiter Coast Intrusive Suite are mostly reflected by positive anomalies (100-500 nT). Modelling studies and the character of distribution of the magnetic anomalies suggest that the plutons of Lassiter Coast Intrusive Suite are prominently reflected in magnetic anomalies of regional extent. The plutonic activities during the geological evolution of Palmer Land have been ... |
format |
Article in Journal/Newspaper |
author |
V. N. Masolov A. V. Golynsky |
author_facet |
V. N. Masolov A. V. Golynsky |
author_sort |
V. N. Masolov |
title |
Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula |
title_short |
Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula |
title_full |
Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula |
title_fullStr |
Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula |
title_full_unstemmed |
Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula |
title_sort |
interpretation of ground and aeromagnetic surveys of palmer land, antarctic peninsula |
publisher |
Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
publishDate |
2000 |
url |
https://doi.org/10.4401/ag-3649 https://doaj.org/article/a18349460f6f4d7c8dca50c05a921adc |
long_lat |
ENVELOPE(-62.000,-62.000,-73.750,-73.750) ENVELOPE(-62.000,-62.000,-74.000,-74.000) ENVELOPE(-65.833,-65.833,-75.500,-75.500) ENVELOPE(49.300,49.300,-67.700,-67.700) ENVELOPE(-65.652,-65.652,-74.688,-74.688) ENVELOPE(-63.000,-63.000,-75.167,-75.167) ENVELOPE(-65.500,-65.500,-75.750,-75.750) ENVELOPE(-65.000,-65.000,-71.500,-71.500) ENVELOPE(-63.583,-63.583,-74.633,-74.633) |
geographic |
Antarctic Antarctic Peninsula Lassiter Lassiter Coast Latady Merrick Mount Poster Orville Orville Coast Pacific Palmer Land The Antarctic Wetmore |
geographic_facet |
Antarctic Antarctic Peninsula Lassiter Lassiter Coast Latady Merrick Mount Poster Orville Orville Coast Pacific Palmer Land The Antarctic Wetmore |
genre |
Antarc* Antarctic Antarctic Peninsula Palmer Land |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Palmer Land |
op_source |
Annals of Geophysics, Vol 43, Iss 2 (2000) |
op_relation |
http://www.annalsofgeophysics.eu/index.php/annals/article/view/3649 https://doaj.org/toc/1593-5213 https://doaj.org/toc/2037-416X doi:10.4401/ag-3649 1593-5213 2037-416X https://doaj.org/article/a18349460f6f4d7c8dca50c05a921adc |
op_doi |
https://doi.org/10.4401/ag-3649 |
container_title |
Annals of Geophysics |
container_volume |
43 |
container_issue |
2 |
_version_ |
1766051872071745536 |