Early Tertiary flood basalts from Hareoen and western Nugssuaq, west Greenland
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Early Tertiary flood basalts from Hareoen and western Nugssuaq, west Greenland

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Published by Geological Survey of Greenland in Copenhagen .
Written in English

Subjects:

  • Basalt - Greenland

Book details:

Edition Notes

11

The Physical Object
Pagination36 p.
Number of Pages36
ID Numbers
Open LibraryOL22032613M

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  Hald N (a) Lithostratigraphy of the Maligât and Hareoen formations, West Greenland basalt group, on Hareoen and Western Nugssuaq. Rapp Gronlands Geol Unders –16 Google Scholar Hald N (b) Normally magnetized lower tertiary lavas on Nugssuaq, central West by:   Courtillot et al.1 have presented palaeomagnetic, palaeontological and K–Ar data for the Deccan flood basalts which suggest that > km3 of basalt may have been erupted in Cited by: Twelve sites (57 drill cores) from two lava series and one dike were sampled for a palaeomagnetic study of the late Paleocene and early Eocene West Greenland flood basalts. Other articles where Flood basalt is discussed: plateau: Formative processes: lava flows (called flood basalts or traps) and volcanic ash bury preexisting terrain, as exemplified by the Columbia Plateau in the northwestern United States. The volcanism involved in such situations is commonly associated with hot spots. The lavas and ash are generally carried long distances from their .

The lower m of the Tertiary lava pile on Mull, western Scotland, consists mainly of small volume (–1 km3), high-magnesian basaltic lava flows. Eruption of these flows probably occurred from fissures or point-source vents, producing pahoehoe-textured sheets averaging about 5 m in thickness. Certain lavas cropping out in northwest Mull greatly exceed this . The accumulation of flood basalts of the Deccan Traps, western India, is one of the most remarkable volcanic provinces on Earth in sheer extent and volume. These rocks are akin in composition and occurrence to other extensive continental basalt provinces, usually located near plate margins, but distributed worldwide and of various ages1. Recent interest in the Deccan flood basalts. In the late Oligocene-early Miocene through to the present time, large volumes of flood basalts emplaced at discrete eruptive centres along the western margin of the Arabian plate from the Gulf of Aden to the Mediterra- nean. These plateau basalts are concentrated on the Ara- bian side of the Red Sea without matching counterparts. A Model for Flood Basalt Vulcanism by K. G. COX Department of Geology and Mineralogy, Parks Road, Oxford, U.K. (Received 15 June ; in revised form 19 October ) ABSTRACT The question of whether basaltic rocks in continental flood basalt provinces are primary magmas or whether they are descended in general from picritic parent magmas is.

In the nunataks of the Prince of Wales Mountains the tholeiite flood basalts of the East Greenland Tertiary Province are unconformably overlain by alkaline lavas. The majority of the alkaline lavas are strongly porphyritic picrites, ankaramites and hawaiites. These rocks have lower Nd/Nd and higher 87Sr/86Sr than the tholeiitic flood basalts and are isotopically akin to ocean island basalts. The accumulation of flood basalts of the Deccan Traps, western India, is one of the most remarkable volcanic provinces on Earth in sheer extent and volume. These rocks are akin in composition and. FLOOD BASALTS or LARGE IGNEOUS PROVINCES (LIP) Atlantic Flood Basalts Greenland ‐North Atlantic basalts were erupted. Dating Early K/Ar dating indicated eruptions over 40‐50 Myr. Modern 40Ar/39Ar dating narrows this down to under 2. Their similarity to other Flood Basalts, eg of Antarctica, is marked. Two small groups of lavas, one highly magnesian, analysed by Kerr, (, ); (, ) for the Plateau Lavas of Mull, do not have a distinct flood basalt fingerprint but have high Ba, variable K and a slightly -ve Nb, and moderately high silica (%).