Gutenberg Open Science: Petrogenesis of the Snezhnoe ruby deposit, Central Pamir

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-4933

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DC Field	Value	Language
dc.contributor.author	Litvinenko, Andrey K.	-
dc.contributor.author	Sorokina, Elena S.	-
dc.contributor.author	Häger, Tobias	-
dc.contributor.author	Kostitsyn, Yuri A.	-
dc.contributor.author	Botcharnikov, Roman E.	-
dc.contributor.author	Somsikova, Alina V.	-
dc.contributor.author	Ludwig, Thomas	-
dc.contributor.author	Romashova, Tatiana V.	-
dc.contributor.author	Hofmeister, Wolfgang	-
dc.date.accessioned	2020-07-10T08:49:30Z	-
dc.date.available	2020-07-10T08:49:30Z	-
dc.date.issued	2020	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/4936	-
dc.description.abstract	The Snezhnoe ruby deposit is located in the Muzkol–Rangkul anticlinorium within the Cimmerian zone of the Central Pamir. On the local scale, the deposit occurs on discrete relict bedding planes of calcitic marbles belonging to the Sarydzhilgin suite. Four ruby-bearing mineral assemblages are present within the main parts of the deposit: (1) scapolite + phlogopite + muscovite + margarite; (2) plagioclase + muscovite + margarite; (3) muscovite + phlogopite + margarite; (4) calcite. The ruby + calcite association is the most economically important, whereas the association of plagioclase + scapolite + phlogopite + muscovite is typical for the ruby-free parts of the deposit. Mica group minerals with a distinctive green color due to enhanced Cr and V concentrations are the main prospecting indicators for the ruby mineralization. The oxygen isotopic composition of the rubies is +15.3‰, a common value for crustal metamorphic and sedimentary rocks. The ratios of indicative trace elements in the rubies are Ga/Mg < 8.2, Fe/Mg < 51.2, Cr/Ga > 6.9 and Fe/Ti < 31.6. These values are characteristic for metamorphic corundum. The bulk ruby-bearing rocks have an initial 87Sr/86Sr ratio of ~0.70791 and εNd of ~−9.6, also pointing to the crustal origin of the deposit in agreement with the geological data. Ancient Al-enriched sediments are suggested to be a possible protolith for the ruby-bearing rocks. The temperature of the metamorphic processes was estimated at 760 ± 30 °C using Zr-in-rutile geothermometry. Raman mapping of rutile inclusions trapped within the ruby crystal indicates that the minimum pressure of mineralization was about one kilobar. The age determined by the Rb–Sr thermal ionization mass spectrometry of phlogopite, plagioclase and bulk rock is 23 ± 1.6 Ma, corresponding to the timing of relaxation after peak metamorphism during the Alpine–Himalayan Orogeny	en_GB
dc.description.sponsorship	DFG, Open Access-Publizieren Universität Mainz / Universitätsmedizin Mainz	de
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject.ddc	550 Geowissenschaften	de_DE
dc.subject.ddc	550 Earth sciences	en_GB
dc.title	Petrogenesis of the Snezhnoe ruby deposit, Central Pamir	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-4933	-
jgu.type.dinitype	article	-
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 09 Chemie, Pharmazie u. Geowissensch.	de
jgu.organisation.number	7950	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Minerals	de
jgu.journal.volume	10	de
jgu.journal.issue	5	de
jgu.pages.alternative	Art. 478	de
jgu.publisher.year	2020	-
jgu.publisher.name	MDPI	de
jgu.publisher.place	Basel	de
jgu.publisher.uri	https://doi.org/10.3390/min10050478	de
jgu.publisher.issn	2075-163X	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	550	de
jgu.publisher.doi	10.3390/min10050478
jgu.organisation.ror	https://ror.org/023b0x485
Appears in collections:	JGU-Publikationen

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