Volcanic marker horizons in the Maligat Formation on Disko and Nugssuaq, and implications for the development of the southern part of the West Greenland Basin in the early Tertiary

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Authors:Larsen, L. M.; Pedersen, A. K.
Author Affiliations:Primary:
Geol. Survey Greenland, Copenhagen 1350, Denmark
Volume Title:Rapport - Gronlands Geologiske Undersogelse (1964)
Source:Rapport - Gronlands Geologiske Undersogelse (1964), Vol.148, p.65-73. Publisher: Grønlands Geologiske Undersøgelse, Copenhagen, Denmark. ISSN: 0418-6559
Publication Date:1990
Note:In English; illus. incl. 6 anals., chart, 1 table, sketch maps
Summary:The feldspar-phyric basalts of the Rinks Dal member (Lower Tertiary Maligat formation) contain two marker units of lavas which are distinct chemically and can be recognized over large areas. A pahoehoe unit filled a approx 60 m deep water basin in E Disko and evened out the topography so that the following FeTi unit was able to spread subaerially throughout Disko and S Nugssuaq. Eruption sites were located in W Disko. In the E parts the FeTi unit lavas are intercalated with sandstones and shales, and the lavas have sometimes invaded the sediments to form sill-like bodies. Lateral time-equivalent facies variations are demonstrated. The general palaeoslope was from W to E which shows that the continental margins to the W had not yet begun to sag. Major-element analyses of six lavas are given. [W.S.W.]
Subjects:Cenozoic; Igneous rocks; Lower Tertiary; Major elements; Marker beds; Paleogeography; Tertiary; Volcanic rocks; Arctic region; Disko Island; Greenland; West Greenland; Key beds; Maligat Formation; Nugssuaq; Polar regions
Abstract Numbers:93M/1065
Record ID:1993030148
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique
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