Occurence and petrology of lamprophyres from the Northern part of the Ditrău alkaline massif, Eastern Carpathians, Romania

Batki Andrea and Pál Molnár Elemér and Bárdossy Apolka: Occurence and petrology of lamprophyres from the Northern part of the Ditrău alkaline massif, Eastern Carpathians, Romania. In: Acta mineralogica-petrographica, (45) 2. pp. 21-27. (2004)

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Abstract

Lamprophyre dykes and dyke swarms exposed in the northern part of the Ditràu Alkaline Massif (DAM) intersect granitoids, syenitoids, hornblendites and diorites. Accordingly to the lamprophyres geological conditions, they are the last stage of the DAM's magmatic evolution. Most of the lamprophyres are composed of phenocrysts of augite which are included in a matrix consisting of fine-grained kaersutiteferrokaersutite, hastingsite-magnesiohastingsite, biotite and interstitial albite-oligoclase-andesine. Other lamprophyre varieties have augite and/or melanite phenocrysts. Their microcrystalline groundmass is composed of mainly arfvedsonite, biotite, albite-oligoclase and orthoclase. Both lamprophyre types contain felsic globular structures filled with carbonatic and/or feldspathic minerals. Mineral assemblage and major element geochemical composition indicate that they are camptonites within alkaline lamprophyres and kersantites within calcalkaline lamprophyres.

Item Type: Article
Journal or Publication Title: Acta mineralogica-petrographica
Date: 2004
Volume: 45
Number: 2
ISSN: 0365-8066
Page Range: pp. 21-27
Language: English
Publisher: Department of Mineralogy, Geochemistry and Petrology, University of Szeged
Place of Publication: Szeged
Related URLs: http://acta.bibl.u-szeged.hu/39427/
Uncontrolled Keywords: Földtan, Ásványtan, Kőzettan
Additional Information: Ill. ; összefoglalás angol nyelven
Subjects: 01. Natural sciences
01. Natural sciences > 01.05. Earth and related environmental sciences
Date Deposited: 2016. Oct. 17. 09:24
Last Modified: 2022. Aug. 23. 11:08
URI: http://acta.bibl.u-szeged.hu/id/eprint/25129

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