Tourmaline as a prospecting guide for the porphyry-style deposits

Бакшеев, И. А.; Prokof’ev, V. Yu.; Zaraisky, Georgii P.; Chitalin, A. F.; Yapaskurt, V.O.; Nikolaev, Y.N.; Тихомиров, П. Л.; Nagornaya, E. V.; Rogacheva, Lubov’ I.; Gorelikova, N. V.; Kononov, O. V.

doi:10.1127/0935-1221/2012/0024-2241

Cited by 42 publications

(21 citation statements)

References 21 publications

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“…Thus, the data obtained indicate that tourmaline evolves from dravite (or oxy-dravite) to magnesio-foitite. The trend differs from other trends typical of tourmalines from porphyry-style deposits (Baksheev et al, 2012) (Fig. 1).…”

contrasting

confidence: 79%

Tourmaline Composition of the Kışladaĝ Au Deposit, Uşak, Turkey

Bozkaya

Hanilçi

Бакшеев

et al. 2014

Acta Geologica Sinica (Eng)

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contrasting

confidence: 79%

Tourmaline Composition of the Kışladaĝ Au Deposit, Uşak, Turkey

Bozkaya

Hanilçi

Бакшеев

et al. 2014

Acta Geologica Sinica (Eng)

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“…According to Baskheev et al . (2012), the AlOFe –1 (OH) –1 and FeAl –1 exchange vectors are primary. They correspond to Al + O 2– ↔ Fe 2+ + OH – and Fe 3+ ↔ Al chemical substitutions, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…10) with variations in Fe tot content from 1.5 to 3.0 apfu. Oscillatory zoning in tourmaline crystals such as that observed in individual grains of the Solnechnoe tin-stage tourmaline has been reported in tourmaline from various environments (Baksheev and Kudryavtseva, 2004; Lussier et al , 2011; Baksheev et al ., 2012; Huang et al ., 2016). Norton and Dutrow (2001), Choo (2003), Dutrow and Henry (2018) and Dutrow et al (2019) having discussed oscillatory zoning in tourmaline crystals concluded that it is caused by a dynamic fluid regime.…”

Section: Discussionmentioning

confidence: 99%

“…The tourmaline supergroup minerals with general formula XY 3 Z 6 [ T 6 O 18 ][ B O 3 ] 3 V 3 W , where X = Na, Ca, K and □ (vacancy); Y = Li, Mg, Al, Cr 3+ , V 3+ , Fe 3+ , Fe 2+ , Mn 2+ , Ni and (Ti 4+ ); Z = Mg, Fe 2+ , Al, Fe 3+ , V 3+ and Cr 3+ ; T = Si, Al and (B) (Fe 3+ ); B = B and □; V = OH and O; and W = OH, F and O (Henry et al , 2011) are stable over a range of low-temperature hydrothermal to magmatic and high-pressure metamorphic conditions. They are extremely variable in composition and isomorphic substitutions, which allow their consideration as indicators of mineral-forming conditions and as an important prospecting guide (Kuzmin et al ., 1979; Slack, 1996; Henry et al ., 2008; Collins, 2010; Hinsberg et al ., 2011; Baksheev et al ., 2012).…”

Section: Introductionmentioning

confidence: 99%

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Tourmaline from the Solnechnoe tin deposit, Khabarovsk Krai, Russia

Бакшеев

Вигасина

Yapaskurt

et al. 2019

MinMag

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Tourmaline from the Solnechnoe hydrothermal granitoid-related tin deposit in the Khabarovsk Krai, Russian Far East has been studied with electron microprobe, infrared and Mössbauer spectroscopy. Tourmaline formed in three distinct stages with different types of chemical substitution. Tourmaline from the first unmineralised stage is classified as dravite or schorl, which could be enriched locally in Ca, the X-site vacancy and F. This tourmaline is characterised by the Fe ↔ Mg and X vacancy + Al ↔ Na + Fe substitutions. The second, molybdenum-stage tourmaline, is schorl–dravite and fluor-schorl–fluor-dravite enriched in Ca, and a few compositions belong to the calcic group. The predominant substitution is Ca + Mg ↔ Na + Al. The third, tin-stage tourmaline, is classified as schorl–dravite with some tourmalines being fluor-schorl, oxy-schorl, foitite and magnesio-foitite. The tin-stage tourmaline is characterised by the substitutions Fe2+ ↔ Mg, Altot + O2– ↔ Fe2+ + OH–, and Fe3+ ↔ Altot. An increase of the Fe3+/Fetot value from 3–9% in the molybdenum stage to 12–16% in the tin-stage tourmalines indicates an increase in oxidation potential, which possibly contributed to cassiterite deposition. Comparison of tourmalines from greisen, porphyry and intrusion-related tin deposits worldwide shows they differ in primary chemical substitutions so can be characterised by this mechanism. The Fe3+/Fetot value in tourmaline also appears to be one of the indications for the tin deposit type. The Fe3+/Fetot value increases from <10% in greisen tourmaline through 15% in tourmaline from intrusion-related deposits to 20% in tourmaline from porphyry deposits.

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“…Typical ore minerals are bornite, chalcopyrite, pyrite, magnetite, molybdenite, and rare native gold (Nagornaya 2010). The stockwork veins are conformal to the quartz-monzonite porphyry phases that merge together at depth, but also extends for tens to, locally, several hundred meters into the surrounding country rocks of the Egdygkych pluton (Baksheev et al 2012;Soloviev 2014). Deep exploration drilling defines a north-south oriented, elongated stockwork zone of about 7000 m by 1500 m in size and economic mineralization extends to a vertical depth of >700 m Nikolaev et al 2014).…”

Section: Peschanka Copper-goldmentioning

confidence: 98%