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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes


Pub. Id: A110 (1982)

First Page: 103

Last Page: 113

Book Title: M 34: Studies in Continental Margin Geology

Article/Chapter: Geodynamics of the Transitional Zone from the Moma Rift to the Gakkel Ridge: Rifted Margins: Field Investigations of Margin Structure and Stratigraphy

Subject Group: Geologic History and Areal Geology

Spec. Pub. Type: Memoir

Pub. Year: 1982

Author(s): A. F. Grachev


The Moma Rift, the Laptev Sea rift zone, and the mid-oceanic Gakkel Ridge form the Arctic rift system. It took shape about 50 m.y. ago due to opening of the Eurasian Basin with respect to a rotation pole in the southern Moma rift (Northeastern Asia). A thinned crust, anomalous mantle, local seismicity, and linear grabens characterize the present structure of the Laptev sea floor. These features were caused by the invasion of the mid-oceanic Gakkel Ridge onto a shelf area. The southernmost Arctic rift system (i.e. the Moma Rift) developed as a superimposed tension structure within a Northeastern Asia orogenic zone.

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