The analysis of the volatiles from fluid inclusions in hydrothermal fluorite

Piperov, N.B.; Penchev, N.P.; Zidarova, B.

doi:10.1016/0009-2541(79)90040-8

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…It is evident that grains, smaller than a critical size (e.g. a < 10 mm), [20][21][22] would not contain sufficiently large inclusions and therefore would not supply enough material to reach the detection limits of the analytical method.…”

Section: Time-resolved D-icp Analysismentioning

confidence: 99%

A reappraisal of decrepitation-inductively coupled plasma spectroscopy (D-ICP) for the bulk analysis of fluid inclusions in minerals

2016

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Section: Time-resolved D-icp Analysismentioning

confidence: 99%

A reappraisal of decrepitation-inductively coupled plasma spectroscopy (D-ICP) for the bulk analysis of fluid inclusions in minerals

2016

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“…The technique of decrepitation in vacuo (Fig. 3 -V) and some decreptograms of fluorite and quartz are given in Piperov and Zidarova (1995) and Piperov et al (2016). Mineral samples (~0.5 g grains) are subjected to kinetic study by heating them at a rate of 10 °C/min in a closed volume (~2 L) at a starting (background) pressure p ≤ 10 -3 Torr.…”

Section: Decreptometrymentioning

confidence: 99%

“…The intensive increase in the pressure is detected by a Pirani-type manometer and recorded continuously (e.g., Piperov and Zidarova, 1995) (Fig. 3 -K).…”

Section: Decreptometrymentioning

confidence: 99%

Thermometric and chemical studies of fluid inclusions in sphalerite from Rhodope lead-zinc deposits: Shumachevski Dol – Gyudyurska (Madan District) and Kenan Dere (Laki District), Bulgaria

Piperov¹,

Petrov²,

Atanassova-Vladimirova³

2023

GeolBalc

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The objects of this study are fluid inclusions in sphalerite crystals or selected parts of them from two Central Rhodopean deposits: Shumachevski Dol – Gyudyurska (Madan District) and Kenan Dere (Laki District). A set of data for temperature of homogenization and total salinity are presented. The locations of coupled data in coordinates Th vs total salinity reveal that the Kenan Dere sphalerite has been deposited from solutions of higher temperature (280–374 °C) and lower salinity (2–5 wt.% NaCl-eqv.). Conversely, the Shumachevski Dol and Gyudyurska sphalerites show lower Th = 200–230 °C and somewhat higher salinity (S = 6–12 wt.% NaCl-eqv.). Furthermore, it is likely that both late Kenan Dere and Gyudyurska sphalerites were deposited at 30–50 °C lower temperatures than the earlier ones. Additionally, Decrepitation Inductively-Coupled-Plasma Atomic-Emission-Spectrometry was applied to determine the cations in the inclusion solute. The vacuum decrepitation was also used for liberating the volatiles (H2O, CO2) and analysing them by mass spectrometry. On that account, more detailed preliminary studies of the process of decrepitation were performed. However, the Zn-concentration in sphalerite-hosted fluid inclusions cannot be evaluated and the results from syngenetic quartz offer the only possibility for obtaining information about ore-element content. On the basis of a compilation of both present and previously published data, it can be concluded that the hydrothermal fluid under the Central Rhodope Dome was constituted in situ as a closed system at a depth of ~1 km, under nearly lithostatic pressure (~200 bars), T ≥ 350 °C, and NaCl-dominated salt content ~10%. Under these conditions, a solution with a pH of ~4.0–4.5 contains ore elements (Fe, Zn, Pb) as soluble chlorido-complexes; for Zn, the total concentration may reach 1 wt.%. Sulphide-S compound under these conditions is H2S. The sphalerite deposition follows a reverse path of the chemical reactions. The elevation of the hydrothermal fluid along the extensional dislocations results in boiling (i.e., separation of CO2) and cooling. The temperature decrease destabilizes the chlorido-complexes and leads to an increase in the Zn2+ activity. On the other hand, CO2 loss enhances pH, and thus dissociates H2S, yielding HS- and S2- ions, needed for sphalerite deposition.

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New data from studies on fluid inclusions in hydrothermal fluorites (Mikhalkovo, Bulgaria) with respect to mineral genesis

1981

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The analysis of the volatiles from fluid inclusions in hydrothermal fluorite

Cited by 3 publications

References 10 publications

A reappraisal of decrepitation-inductively coupled plasma spectroscopy (D-ICP) for the bulk analysis of fluid inclusions in minerals

A reappraisal of decrepitation-inductively coupled plasma spectroscopy (D-ICP) for the bulk analysis of fluid inclusions in minerals

Thermometric and chemical studies of fluid inclusions in sphalerite from Rhodope lead-zinc deposits: Shumachevski Dol – Gyudyurska (Madan District) and Kenan Dere (Laki District), Bulgaria

New data from studies on fluid inclusions in hydrothermal fluorites (Mikhalkovo, Bulgaria) with respect to mineral genesis

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