Physicochemical parameters of the origin of hydrothermal mineral deposits: Evidence from fluid inclusions. IV. Copper and molybdenum deposits

Наумов, В. Б.; Дорофеева, В. А.; Mironova, O. F.

doi:10.1134/s0016702917080055

Cited by 6 publications

(9 citation statements)

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“…The different minimum and maximum values of parameters of mineralizing fluids at porphyry deposits of different types in the Cu−Mo−Au system generally do not contradict either the results of earlier studies, e.g., [31,46,47], or the current understanding of processes that produce porphyry deposits, e.g., [8,33,40]. All parameters of mineralizing fluids (their temperature, salinity, and density) at porphyry deposits broadly vary, as do the concentrations of cations, anions, and metals, which confirms that porphyry deposits are formed where and when the mineralizing fluids become heterogeneous [33].…”

Section: Discussionsupporting

confidence: 50%

“…NaCl, [31] from 0 to >60 wt % equiv. NaCl, and [47] from 0.1 to 70.0 wt % equiv. NaCl, which only slightly shifts the upper limit.…”

Section: Discussionmentioning

confidence: 99%

“…Naumov at Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI), Russian Academy of Sciences [48]. This database comprises data from more than 22,700 publications devoted to melt and fluid inclusions and contains more than 116,500 determinations of the temperatures of mineralizing fluids and melts, 16,000 determines of pressure, more than 67,500 determinations of fluid salinity, more than 130,000 analyses of concentrations of various elements in natural fluids, and information on fluid inclusions in minerals from more than 4200 deposits around the globe, e.g., [47][48][49]. We have searched the database for parameters of mineralizing fluids at approximately 60 porphyry deposits of various types in the Cu-Mo-Au system.…”

Section: Overview Of Deposits Discussed In This Publicationmentioning

confidence: 99%

“…It is pertinent to mention the following reviews of fluid inclusions in the minerals of porphyry systems, e.g., [5,26,34,38,[41][42][43][44][45]. Some reviews were devoted to the parameters and composition of fluid inclusions in minerals from porphyry deposits, e.g., [31,46,47]. Fluid inclusions hosted in minerals at porphyry deposits are still actively studied, and extensive newly acquired data were published after the aforementioned reviews.…”

Section: Introductionmentioning

confidence: 99%

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Ranges of Physical Parameters and Geochemical Features of Mineralizing Fluids at Porphyry Deposits of Various Types of the Cu−Mo−Au System: Evidence from Fluid Inclusions Data

Prokofiev

Наумов

2022

Minerals

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The paper reviews and summarizes data on the physicochemical parameters and chemical features of mineralizing fluids at porphyry deposits of the Cu–Mo–Au system. The calculated average values and ranges of parameters of the fluids in mineral-hosted fluid inclusions at porphyry deposits are as follows: temperature 90–957 °C, average 388 °C; salinity 0.1–88.0 wt % equiv. NaCl, average 29.4 wt % equiv. NaCl; and density 0.38–1.85 g/cm3, average 0.93 g/cm3. The highest average temperature and the highest maximum homogenization temperatures of the fluids were detected at deposits of the Cu (Au) type, with both values systematically decreasing with the transition to the Cu, Mo (Au), and then to Mo and Au types of porphyry deposits. The situations with the average and maximum salinity values of the fluids and their density are analogous. The data in the literature on the concentrations of some elements are still insufficient to reliably characterize variations in these concentrations at all of the discussed types of porphyry deposits. The highest Cu and Fe concentrations were found in the highest temperature fluids at deposits of the Cu (Au) type. The maximum Mo concentrations were detected in fluids at porphyry Mo deposits, and the highest Ag concentrations occurred at porphyry Au deposits. The chemical composition of the mineralizing fluids is, thus, strongly correlated with the types of the porphyry deposits. The hypothesis is discussed: the geochemical specifics of mineralizing fluids at various types of porphyry deposits of the Cu–Mo–Au system are related to the depths at which fluid separated from the magmatic melt. A scenario is proposed for the separation of mineralizing fluids from granite melt at various depths for fluids that form different types of porphyry deposits.

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Section: Discussionsupporting

confidence: 50%

“…NaCl, [31] from 0 to >60 wt % equiv. NaCl, and [47] from 0.1 to 70.0 wt % equiv. NaCl, which only slightly shifts the upper limit.…”

Section: Discussionmentioning

confidence: 99%

Section: Overview Of Deposits Discussed In This Publicationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ranges of Physical Parameters and Geochemical Features of Mineralizing Fluids at Porphyry Deposits of Various Types of the Cu−Mo−Au System: Evidence from Fluid Inclusions Data

Prokofiev

Наумов

2022

Minerals

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“…% eq. NaCl, the homogenization temperatures of FIs are also close and are in the range of~186 to 314 • C. The maximum of the values falls on the interval of 250-300 • C, corresponding to the modal value of this parameter for Mo deposits of this type in general [33]. The calculation of temperature by using the isotope geothermometer carried out according to the data published in the article [34], using the pair of quartz-K-feldspar based on equations [34,35], showed a value of 301 • C. Consequently, the temperatures of formation of vein minerals correspond to the maximum measured values of homogenization temperatures (300-314 • C).…”

Section: Discussionmentioning

confidence: 81%

Age, Conditions of Formation, and Fluid Composition of the Pervomaiskoe Molybdenum Deposit (Dzhidinskoe Ore Field, South-Western Transbaikalia, Russia)

et al. 2019

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The article discusses the composition of studied ore-forming solutions and the P-T conditions of molybdenum mineralization in the Pervomaisky stockwork deposit which is situated within the Dzhidinsky ore field (South-Western Transbaikalia, Russia). New geochronological data of zircons from granites, muscovite, and molybdenite from the ore zones indicates the association of the granite formation and ore deposition processes which occurred 119–128 million years ago. Quartz-molybdenite veins of the Pervomaisky deposit were formed at the temperature of ≥314–186 °C with some boiling periods. Fluid inclusions in these veins have total salt concentration of 6.3–12.7 wt. % NaCl equivalent (eq. NaCl). The salt solution is composed of chlorides of Na, Ca, K, and Fe. The gas phase contains CO2, CH4, and N2. A series of elements were determined in fluid inclusions by laser ablation (LA)-ICP-MS: Li, Be, B, F, Na, Mg, Al, Cl, K, Ca, Mn, Fe, Cu, Zn, Nb, Mo, Ag, Sn, La, Ce, Ta, W, Au, Pb, Th, U. The Mo content reaches 559 ppm (average of 228 ± 190 ppm) in high-grade quartz-molybdenite veinlets, whereas Mo content is up to 212 ppm (average of 25 ± 29 ppm) in the low-grade veinlets. High-grade veinlets were formed by near-neutral solutions with a higher content of Mo, S, and F, while relatively low-grade veinlets were deposited from alkaline solutions. Our results demonstrate the pH of the solutions as one of the key factors for ore deposition.

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Physicochemical Parameters of the Origin of Hydrothermal Mineral Deposits: Evidence from Fluid Inclusions. V. Antimony, Arsenic, and Mercury Deposits

2018

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Physicochemical parameters of the origin of hydrothermal mineral deposits: Evidence from fluid inclusions. IV. Copper and molybdenum deposits

Cited by 6 publications

References 85 publications

Ranges of Physical Parameters and Geochemical Features of Mineralizing Fluids at Porphyry Deposits of Various Types of the Cu−Mo−Au System: Evidence from Fluid Inclusions Data

Ranges of Physical Parameters and Geochemical Features of Mineralizing Fluids at Porphyry Deposits of Various Types of the Cu−Mo−Au System: Evidence from Fluid Inclusions Data

Age, Conditions of Formation, and Fluid Composition of the Pervomaiskoe Molybdenum Deposit (Dzhidinskoe Ore Field, South-Western Transbaikalia, Russia)

Physicochemical Parameters of the Origin of Hydrothermal Mineral Deposits: Evidence from Fluid Inclusions. V. Antimony, Arsenic, and Mercury Deposits

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