Compilation of shipborne magnetic and gravity data images crustal structure of Prydz Bay (East Antarctica)

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Compilation of shipborne magnetic and gravity data images crustal structure of Prydz Bay (East Antarctica). / Ishihara, T.; Leitchenkov, G. L.; Golynsky, A. V.; Alyavdin, S.; O'Brien, P. E.

In: Annali di Geofisica, Vol. 42, No. 2, 01.01.1999, p. 229-248.

Research output: Contribution to journal › Article › peer-review

Author

Ishihara, T. ; Leitchenkov, G. L. ; Golynsky, A. V. ; Alyavdin, S. ; O'Brien, P. E. / Compilation of shipborne magnetic and gravity data images crustal structure of Prydz Bay (East Antarctica). In: Annali di Geofisica. 1999 ; Vol. 42, No. 2. pp. 229-248.

BibTeX

@article{13a774ba20fe46c2a3604b2004dcd4a3,

title = "Compilation of shipborne magnetic and gravity data images crustal structure of Prydz Bay (East Antarctica)",

abstract = "A magnetic anomaly map and a free air anomaly map of Prydz Bay, of the adjacent slope and over the continental rise area (63°S-69.5°S, 69°E-81°E) were compiled using Russian, Australian, Japanese and other available data (more than 20 000 km in total length). Adjustment of different data sets was performed before gridding and making contour maps. Crossover differences of the magnetic data were significantly reduced by removing data segments with short-period time variations, by applying time variation corrections of Mawson Station to Australian and Japanese data, and by giving a constant bias to each trackline. Crossover differences of the gravity data were also substantially reduced by applying a constant bias to each cruise/leg. According to the compiled gravity data, in the western part of Prydz Bay the continent ocean boundary is inferred to be situated around the shelf edge at the seaward end of Prydz Channel, while it is in the continental rise in the eastern part. The gravity data also suggest the presence of sediments in the Prydz Bay basin reaching a thickness of about 8 km and overlying a 'granitic' layer; the Moho beneath the basin is located at a depth of about 22 km. According to the magnetic data, highly-magnetized rocks occur at shallow depths northwest of the Prydz Bay basin and other parts of Prydz Bay.",

keywords = "Gravity anomalies, Magnetic anomalies, Prydz Bay, Shipborne data, Two-dimensional modelling",

author = "T. Ishihara and Leitchenkov, {G. L.} and Golynsky, {A. V.} and S. Alyavdin and O'Brien, {P. E.}",

year = "1999",

month = jan,

day = "1",

language = "English",

volume = "42",

pages = "229--248",

journal = "Annals of Geophysics",

issn = "1593-5213",

publisher = "Editrice Compositori s.r.l.",

number = "2",

}

RIS

TY - JOUR

T1 - Compilation of shipborne magnetic and gravity data images crustal structure of Prydz Bay (East Antarctica)

AU - Ishihara, T.

AU - Leitchenkov, G. L.

AU - Golynsky, A. V.

AU - Alyavdin, S.

AU - O'Brien, P. E.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - A magnetic anomaly map and a free air anomaly map of Prydz Bay, of the adjacent slope and over the continental rise area (63°S-69.5°S, 69°E-81°E) were compiled using Russian, Australian, Japanese and other available data (more than 20 000 km in total length). Adjustment of different data sets was performed before gridding and making contour maps. Crossover differences of the magnetic data were significantly reduced by removing data segments with short-period time variations, by applying time variation corrections of Mawson Station to Australian and Japanese data, and by giving a constant bias to each trackline. Crossover differences of the gravity data were also substantially reduced by applying a constant bias to each cruise/leg. According to the compiled gravity data, in the western part of Prydz Bay the continent ocean boundary is inferred to be situated around the shelf edge at the seaward end of Prydz Channel, while it is in the continental rise in the eastern part. The gravity data also suggest the presence of sediments in the Prydz Bay basin reaching a thickness of about 8 km and overlying a 'granitic' layer; the Moho beneath the basin is located at a depth of about 22 km. According to the magnetic data, highly-magnetized rocks occur at shallow depths northwest of the Prydz Bay basin and other parts of Prydz Bay.

AB - A magnetic anomaly map and a free air anomaly map of Prydz Bay, of the adjacent slope and over the continental rise area (63°S-69.5°S, 69°E-81°E) were compiled using Russian, Australian, Japanese and other available data (more than 20 000 km in total length). Adjustment of different data sets was performed before gridding and making contour maps. Crossover differences of the magnetic data were significantly reduced by removing data segments with short-period time variations, by applying time variation corrections of Mawson Station to Australian and Japanese data, and by giving a constant bias to each trackline. Crossover differences of the gravity data were also substantially reduced by applying a constant bias to each cruise/leg. According to the compiled gravity data, in the western part of Prydz Bay the continent ocean boundary is inferred to be situated around the shelf edge at the seaward end of Prydz Channel, while it is in the continental rise in the eastern part. The gravity data also suggest the presence of sediments in the Prydz Bay basin reaching a thickness of about 8 km and overlying a 'granitic' layer; the Moho beneath the basin is located at a depth of about 22 km. According to the magnetic data, highly-magnetized rocks occur at shallow depths northwest of the Prydz Bay basin and other parts of Prydz Bay.

KW - Gravity anomalies

KW - Magnetic anomalies

KW - Prydz Bay

KW - Shipborne data

KW - Two-dimensional modelling

UR - http://www.scopus.com/inward/record.url?scp=0032886167&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032886167

VL - 42

SP - 229

EP - 248

JO - Annals of Geophysics

JF - Annals of Geophysics

SN - 1593-5213

IS - 2

ER -

ID: 35965907