Results 101 to 110 of about 16,578 (144)

Ultramafic lamprophyre dyke swarm, Torngat Mountains, Quebec and Labrador: mineralogy and geochemistry

International Kimberlite Conference Extended Abstracts: 2003, 2019
openaire   +2 more sources

Impact structures in Africa: A review.

J Afr Earth Sci, 2014
Reimold WU, Koeberl C.
europepmc   +1 more source

Ultramafic lamprophyre from the Wajrakarur kimberlite field of Southern India and its petrogenetic significance

International Kimberlite Conference Extended Abstracts: 2017, 2019
openaire   +2 more sources

Late Cretaceous Ultramafic Lamprophyres and Carbonatites From the Delitzsch Complex, Germany

Chemical Geology, 2013
The Delitzsch Complex consists of late Cretaceous ultramafic lamprophyres and carbonatitic rocks. They form dikes and diatremes, emplaced into Palaeozoic to lower Permian volcanic and sedimentary rocks, and are covered by up to 120 m thick sequences of Tertiary sedimentary rocks. The complex includes a diversity of magmatic and subvolcanic rocks.
H Kämpf, R L Romer
exaly   +5 more sources

Ultramafic Lamprophyres of the Ferrar Large Igneous Province: Evidence for a HIMU Mantle Component

Lithos, 2003
Abstract Ultramafic lamprophyre (UML) dykes from the Ferrar Province (Pensacola Mountains) of Antarctica preserve trace element and isotope signatures similar to Bouvet volcanic rocks, which are considered to reflect the palaeo composition of the Bouvet mantle plume.
Ian Parkinson, Teal R Riley, Philip Leat
exaly   +5 more sources

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Torngat Ultramafic Lamprophyres and Their Relation to the North Atlantic Alkaline Province

Lithos, 2004
Geological mapping and diamond exploration in northern Quebec and Labrador has revealed an undeformed ultramafic dyke swarm in the northern Torngat Mountains. The dyke rocks are dominated by an olivine-phlogopite mineralogy and contain varying amounts of primary carbonate.
Stephen Foley, Larry M Heaman, Sebastian Tappe   +2 more
exaly   +2 more sources

Alkaline‐Ultramafic Lamprophyres and Kimberlites of the Kola Peninsula

Polar Geography and Geology, 1994
Abstract The distribution of the alkaline lamprophyres (dikes and diatremes) of the central and southern parts of the Kola Peninsula and of the kimberlite pipes on its southeastern coast is controlled by the Onega‐Kandalaksha graben zone. In the western part of this zone the dikes and diatremes are confined to alkaline‐ultramafic plutons, but in the ...
Sergei Simakov
exaly   +2 more sources

Petrology of Late Jurassic Allochthonous Ultramafic Lamprophyres Within the Batain Nappes, Northeastern Oman

International Geology Review, 2016
ABSTRACTLate Jurassic ultramafic lamprophyre (UML) sills and dikes occur as 3 km-long intrusions within the allochthonous Whara Formation of the Batain nappes, eastern Oman. The sills and dikes comprise macrocrystic phlogopite and spinel-bearing aillikite and damtjernite.
Sobhi Nasir
exaly   +2 more sources

Trace Elements in Olivine of Ultramafic Lamprophyres Controlled by Phlogopite-Rich Mineral Assemblages in the Mantle Source

Lithos, 2017
Abstract Carbonate-rich ultramafic lamprophyres (aillikites) and associated rocks characteristically occur during the early stages of thinning and rifting of cratonic mantle lithosphere, prior to the eruption of melilitites, nephelinites and alkali basalts.
Marina Veter, Stephen Foley, Regina Mertz-Kraus   +2 more
exaly   +2 more sources