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2019 | OriginalPaper | Buchkapitel

6. Makarov Basin

verfasst von : Alexey L. Piskarev, Yury G. Firsov, Victor A. Poselov, Oleg E. Smirnov

Erschienen in: Geologic Structures of the Arctic Basin

Verlag: Springer International Publishing

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Abstract

Makarov Basin - abyssal plain, 3800 m bsl on average (occasionally–over 4000 m, very close to the depth of the Nansen and Canada Basins), is mostly flat, disturbed only by 800 m-high linear ridge – abyssal continuation of the Marvin Spur. The potential fields anomalies illustrate the variety of structural plans of the Makarov Basin and surrounding regions. Gravity anomalies inside the Makarov Basin display symmetrical pattern relative to the linear positive anomaly parallel to 120°E, flanked by gravity lows on both side.

The total thickness of the sedimentary cover varies from 2 to 4 km. The regional pre-Miocene unconformity RU at the base of the hemipelagic Miocene deposits is traceable through the whole Makarov Basin. The reduced Paleogene complex between the RU and post-Campanian unconformity pCU overlays the Upper Cretaceous and, possibly, older formations. Upper and lower crusts are estimated to be 3–6 km and 3–4 km, accordingly. Total crust thickness is 10–12 km.

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Vorheriges Kapitel Podvodnikov Basin

Nächstes Kapitel Mendeleev and Alpha Ridges

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Titel: Makarov Basin
verfasst von: Alexey L. Piskarev
Yury G. Firsov
Victor A. Poselov
Oleg E. Smirnov
Verlag: Springer International Publishing
Buch: Geologic Structures of the Arctic Basin
Print ISBN: 978-3-319-77741-2

Electronic ISBN: 978-3-319-77742-9

Copyright-Jahr: 2019
DOI: https://doi.org/10.1007/978-3-319-77742-9_6