The investigation of chemical composition of tourmalines in biotite- muscovite granite of Mashhad [PDF]
پترولوژی, 2019 Tourmaline occurs in the biotite-muscovite granite of Mashhad as nodule, euhedral tourmalines in pegmatite and aplite, quartz-tourmaline veins, tourmaline-rich veins and radial tourmalines.
Farhad Zal +2 more
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Anais da Academia Brasileira de Ciências, 2003 Tourmalines of intermediate schorl-dravite composition occur in iron formation (including metachert and tourmalinites), metasediments, calc-silicate and metabasic/intermediate rocks of the Morro da Pedra Preta Formation, a volcanic-sedimentary sequence ...
Gianna M. Garda +3 more
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Evolution of ore- forming fluids in Dashkasan gold deposit, NE Qorveh, West of Iran, based on tourmaline chemical composition and fluid inclusion data [PDF]
پترولوژی, 2023 Tourmaline is a borosilicate mineral with general formula of XY3Z6[T6O18](BO3)3V3W. Experimental studies demonstrate a wide range of stability for tourmaline-supergroup minerals to record different geological processes.
Mohammad Moradi +3 more
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Insights from the compositional evolution of a multi-coloured, zoned tourmaline from the Cruzeiro pegmatite, Minas Gerais, Brazil [PDF]
European Journal of MineralogyThis study compares the compositional evolution of a multi-coloured, zoned tourmaline crystal from the Cruzeiro pegmatite, Brazil, with the compositions of homogeneous tourmaline crystals systematically collected from the outer to the inner zones of the ...
G. B. Andreozzi +7 more
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Genetic model for the color anomalies at the termination of pegmatitic gem tourmaline crystals from the island of Elba, Italy [PDF]
European Journal of Mineralogy, 2023 Tourmaline crystals from the island of Elba commonly display a sharp transition to dark colors at the analogous termination due to the incorporation of Fe and/or Mn during the latest stages of crystallization in pegmatites.
A. Altieri +4 more
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Frontiers in Earth Science, 2023 The Cuonadong Sn–W–Be polymetallic deposit in the Himalayan leucogranite belt is a representative hydrothermal deposit. The role of fluid exsolution directly from magma and the fluid reaction with surrounding rocks for ore-forming element enrichment is ...
Guozhi Xie +10 more
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Inclusions of diamond crystals in the tourmaline of the schorl-uvite series: problems of genesis
Записки Горного института, 2023 The mineralogical and geochemical features of diamond-bearing tourmaline crystals (schorl-uvite series) from garnet-clinopyroxene rocks of the Kumdy-Kol deposit (Northern Kazakhstan) have been studied in detail.
Andrei V. Korsakov +3 more
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Geochemistry Petrography, thermobarometry and investigation of magmatic series in Mirabad- Chehel Khane granitoid body (east of Bouin– Miandasht, Isfahan province) [PDF]
پترولوژی, 2017 On the base of petrology, the Mirabad- Chehel Khane granitoid, east of Bouin-Miandasht, dominantly consists of syenogranite, monzogranite, alkali granite and granodiorites.
Seyed Mohsen Tabatabaei Manesh +2 more
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Geologica Acta, 2019 The chemical composition of tourmaline has been used as a host environment register as well as a potential exploration tool for mineral deposits. In this study, the textural and chemical composition of tourmalines associated with Zn-Pb mineralizations ...
R. Galdos +3 more
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Записки Горного института, 2019 The research focused on the composition of tourmaline from tin ore deposits and ore occurrences within the Verkhneurmiysky ore cluster in the Amur region. The aim of the study is to determine the indicative signs of tourmaline from cassiterite-quartz and
V. I. Alekseev, Yu. B. Marin
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