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Abstract

Summary

It is shown that the Central Bransfield Basin magnetic anomalies sources were connected with the neovolcanic zone development processes. Age of linear magnetic anomalies may reflect the cooling time of plateau basalts which formed in a result of periodic thermal regime change processes in the upper mantle. The powerful tectonic movements of border structures had a great influence too. The deep geoelectric boundaries and large mantle heterogeneities distribution in different segments of the Drake Passage can be interpreted as large-scale processes of formation and deep transformation of the primary crust fragments under the influence of sufficiently large diapirs of partially molten rocks.

A possible mechanism was proposed for the evolution of the Antarctic Peninsula continental margin structures and the Bransfield Strait in result of moving the mantle plume to the upper layers of lithosphere and young rift system formation under the trough axis in the Central Bransfield basin. New data give additional information for better understanding the evolution stages of structures at this region.

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/content/papers/10.3997/2214-4609.201600452
2016-05-10
2024-04-26

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Central Basin of the Bransfield Strait: magnetic anomalies and the formation stages of the Antarctic Peninsula continental margin structures
Conference Proceedings 2016, 1 (2016); https://doi.org/10.3997/2214-4609.201600452
/content/papers/10.3997/2214-4609.201600452
/content/papers/10.3997/2214-4609.201600452
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