The crystallization temperature of vein quartz estimated from the concentration of the titanium paramagnetic center in quartz: A case study of the Peschanka porphyry copper–molybdenum–gold deposit, Western Chukchi Peninsula, Russia

被引：1

作者：

Prudnikova A.D. ^{[1
]}

Koshchug D.G. ^{[1
]}

Vyatkin S.V. ^{[1
]}

Baksheev I.A. ^{[1
]}

Nagornaya E.V. ^{[1
]}

Marushchenko L.I. ^{[1
]}

Nikolaev Y.N. ^{[1
]}

Chitalin A.F. ^{[2
]}

机构：

[1] Department of Geology, Moscow State University, Moscow

[2] Institute of Geotechnologies LLC, Moscow

来源：

Moscow University Geology Bulletin | 2017年 / 72卷 / 2期

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D O I：

10.3103/S0145875217020041

中图分类号：

学科分类号：

摘要：

The concentration of the Al and Ti paramagnetic impurity centers in pre-ore and ore-stage quartz at the Peschanka porphyry copper–molybdenum–gold deposit in the Western Chukchi Peninsula, Russia were determined using electron paramagnetic resonance spectroscopy (EPR). The [AlO4 -/h+]0 concentration in pre-ore and ore-stage quartz varies from 29 to 124 and from 13 to 101 at. ppm, respectively. The contents of the [TiO4 -/Li+]0 and [TiO4 -/H+]0 centers reach 20 and 6.3 at. ppm, respectively. Pre-ore quartz associated with the formation of biotite–potassium feldspar–quartz alteration and ore-stage quartz associated with the formation of quartz–sericite rocks followed by the ore deposition differ considerably in the Ti center content, especially the [TiO4 -/H+]0 center. The [TiO4 -/H+]0 concentration is much higher in the pre-ore quartz (>2 at. ppm) than that in the ore-stage quartz related to copper mineralization (<2 at. ppm). The [TiO4 -/Li+]0 concentration also decreases from pre-ore to ore-stage quartz. Taking the data we obtained into account, the formation temperature of pre-ore and ore-stage quartz estimated from a titaniumin-quartz geothermometer is 590–470°C (weighted average 520°C) and 510–310°C (weighted average 430°C), respectively. The obtained temperature range of 590 to 310°C is similar to that determined from homogenization of fluid inclusions in quartz. © 2017, Allerton Press, Inc.

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页码：106 / 114

页数：8