Gravity compensation in the mantle beneath the neovolcanic zone of Iceland

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doi: 10.1016/0012-821X(81)90077-7
Authors:Hermance, John F.
Author Affiliations:Primary:
Brown Univ., Dep. Geol. Sci., Providence, RI, United States
Volume Title:Earth and Planetary Science Letters
Source:Earth and Planetary Science Letters, 54(1), p.157-166. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X
Publication Date:1981
Note:In English. 21 refs.; illus. incl. 4 tables, sketch map
Summary:The total gravity field over Iceland is separated into two contributions: one primarily from the crust, the other primarily from the mantle. The analysis is restricted to the neovolcanic zone, using crustal thickness estimates supplied by regional seismic refraction interpretations. Comparing Iceland to less active tectonic regions nearby, a mantle gravity effect of about -430 + or - 40 mgal is obtained. For a simple slab model this leads to a vertically integrated mass deficit per unit surface area of 106g/cm2. The relation of this mass anomaly to the evolution of the Iceland-Faeroe ridge is considered by examining two end- members of a suite of possible evolutionary models. [P.Br.]
Subjects:Bouguer anomalies; Crust; Density; Gravity anomalies; Isostasy; Mantle; Tectonophysics; Volcanism; Atlantic Ocean; Europe; Iceland; Iceland-Faeroe Ridge; North Atlantic; Western Europe; Compensation; North Atlantic Ridge; Ridges; Volcanic zones
Coordinates:N634000 N663000 W0133000 W0244500
Abstract Numbers:82M/2111
Record ID:1981056554
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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