Magnetic field map of the Wilhelm Archipelago shelf zone, West Antarctica

• Autorzy: Bakhmutov, Volodymyr , Yegorova, Tamara , Bakarzhiyeva, Mariya , Mytrokhyn, Olexandr , Shpyra, Viktor , Orlyuk, Mykhailo , Maksymchuk, Valentyn , Tarasov, Viktor , Romenets, Andrii , Nakalov, Yevheniy , Brillinh, Yevhenii , Romanyuk, Oleh , Otruba, Yurii , Litvinov, Dmytro
• Języki publikacji: EN

Abstrakty

EN

The Antarctic Digital Magnetic Anomaly Project is an international research effort to construct a magnetic map of the continent based on ground, satellite, marine, and aeromagnetic surveys. This paper reports the magnetic mapping of the shelf zone in the SE part of the Wilhelm Archipelago, West Antarctica, based on magnetic surveys conducted with Zodiac boats. A spectacular feature of this area is the strong magnetic anomaly of the Antarctic Peninsula (AP) batholith, which was the product of subduction-related Mesozoic-Cenozoic arc magmatism on the former margin of Western Gondwana. We constructed and analyzed a detailed magnetic map of magnetic field anomalies using field observations of rock exposures on the islands and magnetic properties of rocks from laboratory data. The oldest volcanic rocks of Jurassic to Lower Cretaceous age relate to N-NE trending bands of negative magnetic field. The largest feature in the study area is an Upper Cretaceous/ Paleogene granodiorite complex that produces a positive magnetic anomaly. Many smaller anomalies are also present over gabbroid bodies of Cretaceous age. Two-dimensional magnetic modeling shows that heterogeneities in the upper crust may have magnetic susceptibilities in the range of 0.005-0.13 SI. Magnetic field anomalies also delineate an orthogonal system of tectonic faults, including the main NE fault along the Penola Strait (sub-parallel to the AP coastline) and four intersecting faults. These fault systems may be associated with different stages of continental margin evolution along the Antarctic Peninsula.

Słowa kluczowe

PL

półwysep Antarktyczny; archipelag Wilhelma; badania geofizyczne; anomalie magnetyczne; badania skorupy ziemskiej

EN

Antarctic Peninsula; Wilhelm Archipelago; geophysical survey; magnetic anomalies; crustal studies

• Czasopismo: Acta Geophysica
• Rocznik: 2024
• Tom: Vol. 72, no. 3
• Strony: 1693--1712
• Opis fizyczny: Bibliogr. 68 poz.

Twórcy

autor

Bakhmutov, Volodymyr

• Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 32 Palladina Av., Kyiv 03680, Ukraine,
• Institute of Geophysics Polish Academy of Sciences, 64 Księcia Janusza, 01-452 Warszawa, Poland

autor

Yegorova, Tamara

• Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 32 Palladina Av., Kyiv 03680, Ukraine
• Department of Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, Campus, I-43124 Parma, Italy

autor

Bakarzhiyeva, Mariya

• Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 32 Palladina Av., Kyiv 03680, Ukraine

autor

Mytrokhyn, Olexandr

• Educational-Scientific Institute ‘Institute of Geology’, TarasShevchenko National University of Kyiv, 90 Vasylkivska Str., Kyiv 03022, Ukraine

autor

Shpyra, Viktor

• Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 32 Palladina Av., Kyiv 03680, Ukraine

autor

Orlyuk, Mykhailo

• Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 32 Palladina Av., Kyiv 03680, Ukraine

autor

Maksymchuk, Valentyn

• Carpathian Branch of Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 3-B Naukova Str., Lviv 79060, Ukraine

autor

Tarasov, Viktor

• Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 32 Palladina Av., Kyiv 03680, Ukraine

autor

Romenets, Andrii

• Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 32 Palladina Av., Kyiv 03680, Ukraine

autor

Nakalov, Yevheniy

• Carpathian Branch of Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 3-B Naukova Str., Lviv 79060, Ukraine

autor

Brillinh, Yevhenii

• Carpathian Branch of Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 3-B Naukova Str., Lviv 79060, Ukraine

autor

Romanyuk, Oleh

• Carpathian Branch of Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, 3-B Naukova Str., Lviv 79060, Ukraine

autor

Otruba, Yurii

• State Institution National Antarctic Scientific Center, Ministry of Education and Science of Ukraine, 16 Taras Shevchenko Blvd, Kyiv 01601, Ukraine

autor

Litvinov, Dmytro

• Institute of Geological Sciences, National Academy of Sciences of Ukraine, 55-b O. Honchar Str., Kyiv 01054, Ukraine

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Identyfikatory

DOI

10.1007/s11600-023-01190-6