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Silicate and salt melts in the genesis of the Industrial'noe tin deposit: Evidence from inclusions in minerals

Citation

Naumov, VB and Kamenetsky, VS, Silicate and salt melts in the genesis of the Industrial'noe tin deposit: Evidence from inclusions in minerals, Geochemistry International, 44, (12) pp. 1181-1190. ISSN 0016-7029 (2006) [Refereed Article]

DOI: doi:10.1134/S00167029060120032

Abstract

The data obtained on melt and fluid inclusions in minerals of granites, metasomatic rocks, and veins with tin ore mineralization at the Industrial'noe deposit in the southern part of the Omsukchan trough, northeastern Russia, indicate that the melt from which the quartz of the granites crystallized contained globules of salt melts. Silicate melt inclusions were used to determine the principal parameters of the magmatic melts that formed the granites, which had temperatures at 760-1020°C, were under pressures of 0.3-3.6 kbar, and had densities of 2.11-2.60 g/cm3 and water concentrations of 1.7-7.0 wt %. The results obtained on the fluid inclusions testify that the parameters of the mineral-forming fluids broadly varied and corresponded to temperatures at 920-275°C, pressures 0.1-3.1 kbar, densities of 0.70-1.90 g/cm3, and salinities of 4.0-75.0 wt % equiv. NaCl. Electron microprobe analyses of the glasses of twelve homogenized inclusions show concentrations of major components typical of an acid magmatic melt (wt %, average): 73.2% SiO2, 15.3% Al2O3, 1.3% FeO, 0.6% CaO, 3.1% Na2O, and 4.5% K2O at elevated concentrations of Cl (up to 0.51 wt %, average 0.31 wt %). The concentrations and distribution of some elements (Cl, K, Ca, Mn, Fe, Cu, Zn, Pb, As, Br, Rb, Sr, and Sn) in polyphase salt globules in quartz from both the granites and a mineralized miarolitic cavity in granite were assayed by micro-PIXE (proton-induced X-ray emission). Analyses of eight salt globules in quartz from the granites point to high concentrations (average, wt %) of Cl (27.5), Fe (9.7), Cu (7.2), Mn (1.1), Zn (0.66), Pb (0.37) and (average, ppm) As (2020), Rb (1850), Sr (1090), and Br (990). The salt globules in the miarolitic quartz are rich in (average of 29 globules, wt %) Cl (25.0), Fe (5.4), Mn (1.0), Zn (0.50), Pb (0.24) and (ppm) Rb (810), Sn (540), and Br (470). The synthesis of all data obtained on melt and fluid inclusions in minerals from the Industrial'noe deposit suggest that the genesis of the tin ore mineralization was related to the crystallization of acid magmatic melts. © Pleiades Publishing, Inc. 2006.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Ore Deposit Petrology
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Other Mineral Resources (excl. Energy Resources)
Objective Field:Mineral Resources (excl. Energy Resources) not elsewhere classified
Author:Kamenetsky, VS (Professor Vadim Kamenetsky)
ID Code:43375
Year Published:2006
Web of Science® Times Cited:8
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2006-08-01
Last Modified:2007-05-02
Downloads:0

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