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Minerals and T–P parameters of the Evolution of the Lukkulaysvaara Gabbro–Norite Massif, North Karelia

Minerals and T–P parameters of the Evolution of the Lukkulaysvaara Gabbro–Norite Massif, North... Gabbro–norites and gabbros from the Lukkulaisvaara layered ultramafic massif (Northern Karelia) was studied. The T–P parameters of its formation were determined from data on the compositions of the minerals making up these rocks. It is suggested that the Lukkulaisvaara massif was formed in three stages: the first, magmatic stage was associated with intrusion of a mafic melt and the onset of rock crystallization at temperatures above 1000–1200°C and pressure of ~10–13.5 kbar; autometasomatic reworking by fluids took place at the second, late magmatic stage; the third (hydrothermal) stage was associated with later processes. Temperatures below 800°C may reflect either the last stages of a magmatic process or a postmagmatic high-temperature hydrothermal stage. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geology of Ore Deposits Springer Journals

Minerals and T–P parameters of the Evolution of the Lukkulaysvaara Gabbro–Norite Massif, North Karelia

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References (42)

Publisher
Springer Journals
Copyright
Copyright © Pleiades Publishing, Ltd. 2022. ISSN 1075-7015, Geology of Ore Deposits, 2022, Vol. 64, No. 3, pp. 104–122. © Pleiades Publishing, Ltd., 2022. Russian Text © The Author(s), 2022, published in Geologiya Rudnykh Mestorozhdenii, 2022, Vol. 64, No. 3, pp. 276–295.
ISSN
1075-7015
eISSN
1555-6476
DOI
10.1134/s1075701522030035
Publisher site
See Article on Publisher Site

Abstract

Gabbro–norites and gabbros from the Lukkulaisvaara layered ultramafic massif (Northern Karelia) was studied. The T–P parameters of its formation were determined from data on the compositions of the minerals making up these rocks. It is suggested that the Lukkulaisvaara massif was formed in three stages: the first, magmatic stage was associated with intrusion of a mafic melt and the onset of rock crystallization at temperatures above 1000–1200°C and pressure of ~10–13.5 kbar; autometasomatic reworking by fluids took place at the second, late magmatic stage; the third (hydrothermal) stage was associated with later processes. Temperatures below 800°C may reflect either the last stages of a magmatic process or a postmagmatic high-temperature hydrothermal stage.

Journal

Geology of Ore DepositsSpringer Journals

Published: Jun 1, 2022

Keywords: ultramafic massif; gabbro; gabbro–norite; anorthosite; mineral assemblages

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