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...
Main Authors: | , |
---|---|
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1999
|
Subjects: | |
Online Access: | http://hdl.handle.net/2122/1385 |
id |
ftingv:oai:www.earth-prints.org:2122/1385 |
---|---|
record_format |
openpolar |
spelling |
ftingv:oai:www.earth-prints.org:2122/1385 2024-06-09T07:40:06+00:00 Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula Golynsky, A. V. Masolov, V. N. Golynsky, A. V.; VNII Okeangeologia, St. Petersburg, Russia Masolov, V. N.; Polar Marine Geological Research Expedition, Lomonosov, Russia VNII Okeangeologia, St. Petersburg, Russia Polar Marine Geological Research Expedition, Lomonosov, Russia 1999-04 6677932 bytes application/pdf http://hdl.handle.net/2122/1385 en eng 2/42 (1999) http://hdl.handle.net/2122/1385 open aeromagnetic survey batholoth magnetic anomalies modelling Palmer Land susceptibility 04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies article 1999 ftingv 2024-05-15T08:04:29Z 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 Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic The Antarctic Antarctic Peninsula Pacific Orville ENVELOPE(-63.000,-63.000,-75.167,-75.167) Palmer Land ENVELOPE(-65.000,-65.000,-71.500,-71.500) Merrick ENVELOPE(49.300,49.300,-67.700,-67.700) Latady ENVELOPE(-65.833,-65.833,-75.500,-75.500) Lassiter ENVELOPE(-62.000,-62.000,-73.750,-73.750) Wetmore ENVELOPE(-63.583,-63.583,-74.633,-74.633) Lassiter Coast ENVELOPE(-62.000,-62.000,-74.000,-74.000) Orville Coast ENVELOPE(-65.500,-65.500,-75.750,-75.750) Mount Poster ENVELOPE(-65.652,-65.652,-74.688,-74.688) |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
topic |
aeromagnetic survey batholoth magnetic anomalies modelling Palmer Land susceptibility 04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies |
spellingShingle |
aeromagnetic survey batholoth magnetic anomalies modelling Palmer Land susceptibility 04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies Golynsky, A. V. Masolov, V. N. Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula |
topic_facet |
aeromagnetic survey batholoth magnetic anomalies modelling Palmer Land susceptibility 04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies |
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 ... |
author2 |
Golynsky, A. V.; VNII Okeangeologia, St. Petersburg, Russia Masolov, V. N.; Polar Marine Geological Research Expedition, Lomonosov, Russia VNII Okeangeologia, St. Petersburg, Russia Polar Marine Geological Research Expedition, Lomonosov, Russia |
format |
Article in Journal/Newspaper |
author |
Golynsky, A. V. Masolov, V. N. |
author_facet |
Golynsky, A. V. Masolov, V. N. |
author_sort |
Golynsky, A. V. |
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 |
publishDate |
1999 |
url |
http://hdl.handle.net/2122/1385 |
long_lat |
ENVELOPE(-63.000,-63.000,-75.167,-75.167) ENVELOPE(-65.000,-65.000,-71.500,-71.500) ENVELOPE(49.300,49.300,-67.700,-67.700) ENVELOPE(-65.833,-65.833,-75.500,-75.500) ENVELOPE(-62.000,-62.000,-73.750,-73.750) ENVELOPE(-63.583,-63.583,-74.633,-74.633) ENVELOPE(-62.000,-62.000,-74.000,-74.000) ENVELOPE(-65.500,-65.500,-75.750,-75.750) ENVELOPE(-65.652,-65.652,-74.688,-74.688) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Pacific Orville Palmer Land Merrick Latady Lassiter Wetmore Lassiter Coast Orville Coast Mount Poster |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Pacific Orville Palmer Land Merrick Latady Lassiter Wetmore Lassiter Coast Orville Coast Mount Poster |
genre |
Antarc* Antarctic Antarctic Peninsula Palmer Land |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Palmer Land |
op_relation |
2/42 (1999) http://hdl.handle.net/2122/1385 |
op_rights |
open |
_version_ |
1801383591582629888 |