Full text

Turn on search term navigation

© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Conditions of high-temperature volcano-related mineral formation are a source of the new and rare minerals and their associations; they are rather fragmentarily described for volcanic systems as a whole, except for several objects characterized in this regard. The study aim is to present the first results of the mineralogical study of atypical suprasubduction zone neoformation encountered from the Taketomi flank eruption (1933–1934) of the Alaid volcano (Kuril Islands), which has been studied through electron microprobe analyses and powder and single-crystal X-ray diffraction. The following mineral paragenesis is described: diopside, andradite, anorthite, wollastonite, esseneite, wadalite, rhönite-like mineral, fluorite, calcite, apatite, and atacamite. The parageneses of calcium silicates found in volcanic systems are usually interpreted as reworked crustal xenoliths and commonly associated with volcanoes that have a carbonate basement. However, carbonates have not been previously described at the base of the Alaid volcano. Even though the skarn nature of such a mineral paragenesis is possible, we suggest the important role of high-temperature volcanic gases along with the pyrometamorphic effect in the mineral-forming process at depth or in near-surface conditions (fumarole-like type in the form of a system of cracks and burrows). The described mineral paragenesis has not been previously documented, at least for the North Kuril Islands. A detailed mineralogical study of such formations is one of the important steps in understanding the functioning of magmatic systems, the circulation and transformation of natural matter, and mineral-forming processes.

Details

Title
Calcareous Skarn-like Mineral Paragenesis from Unaltered Basalt of the Alaid Volcano (Kuril–Kamchatka Island Arc)
Author
Zhitova, Elena S 1   VIAFID ORCID Logo  ; Nuzhdaev, Anton A 1   VIAFID ORCID Logo  ; Davydova, Vesta O 2   VIAFID ORCID Logo  ; Sheveleva, Rezeda M 3   VIAFID ORCID Logo  ; Zhegunov, Pavel S 1 ; Kuznetsov, Ruslan A 1   VIAFID ORCID Logo  ; Kutyrev, Anton V 1   VIAFID ORCID Logo  ; Khokhlova, Maria A 1 ; Vlasenko, Natalia S 4 

 Institute of Volcanology and Seismology FEB RAS, 683006 Petropavlovsk-Kamchatsky, Russia; [email protected] (E.S.Z.); [email protected] (A.A.N.); [email protected] (V.O.D.); [email protected] (R.M.S.); [email protected] (P.S.Z.); [email protected] (R.A.K.); [email protected] (M.A.K.) 
 Institute of Volcanology and Seismology FEB RAS, 683006 Petropavlovsk-Kamchatsky, Russia; [email protected] (E.S.Z.); [email protected] (A.A.N.); [email protected] (V.O.D.); [email protected] (R.M.S.); [email protected] (P.S.Z.); [email protected] (R.A.K.); [email protected] (M.A.K.); Lomonosov Moscow State University, Leninskie Gory, 1, 119191 Moscow, Russia; [email protected] 
 Institute of Volcanology and Seismology FEB RAS, 683006 Petropavlovsk-Kamchatsky, Russia; [email protected] (E.S.Z.); [email protected] (A.A.N.); [email protected] (V.O.D.); [email protected] (R.M.S.); [email protected] (P.S.Z.); [email protected] (R.A.K.); [email protected] (M.A.K.); St. Petersburg State University, 199034 St. Petersburg, Russia 
 Lomonosov Moscow State University, Leninskie Gory, 1, 119191 Moscow, Russia; [email protected] 
First page
237
Publication year
2025
Publication date
2025
Publisher
MDPI AG
e-ISSN
2075163X
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3181677744
Copyright
© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.