Emeralds from the Delbegetey deposit (Kazakhstan): mineralogical characteristics and fluid-inclusion study

Gavrilenko, Egor and Calvo Pérez, Benjamín and Castroviejo Bolibar, Ricardo and García del Amo, D. (2006). Emeralds from the Delbegetey deposit (Kazakhstan): mineralogical characteristics and fluid-inclusion study. "Mineralogical Magazine", v. 70 (n. 2); pp. 159-173. ISSN 0026-461X.

Description

Title: Emeralds from the Delbegetey deposit (Kazakhstan): mineralogical characteristics and fluid-inclusion study
Author/s:
  • Gavrilenko, Egor
  • Calvo Pérez, Benjamín
  • Castroviejo Bolibar, Ricardo
  • García del Amo, D.
Item Type: Article
Título de Revista/Publicación: Mineralogical Magazine
Date: April 2006
ISSN: 0026-461X
Volume: 70
Subjects:
Faculty: E.T.S.I. Minas (UPM)
Department: Ingeniería Geológica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (3MB) | Preview

Abstract

The aim of this study is to provide the first detailed mineralogical and fluid-inc1usion description of emeralds from the Delbegetey deposit (Kazakhstan). The characteristic features of Delbegetey emeralds are established: they have dissolution figures on crystal faces, bluish colour and distinct colour zoning; the refractive indices are ro = 1.566-1.570, E = 1.558-1.562, and the specific gravity is 2.65±0.005, relatively low for natural emeralds; they have very small concentrations of the impurities (Fe, Mg, Na and others) typical of other emeralds, and contain Cr and V; there is a significant preponderance of vapour in fluid inc1usions of all types and there is liquid-to-vapour homogenization of primary fluid inc1usions (at 395-420°C). The lattice oxygen isotope composition data obtained (0180 SMOW value of 11.3%0) situate the deposit within the range characteristic of other granite-related emerald deposits. Emerald crystallization took place in low-density (0.40-0.55 g/cm3 ) aqueous fluid, with the following chemical composition (mol.%): 75.6-97.4 HzO, 0.0-18.4 caz, 0.0-0.9 C~, and 4.06-9.65 wt.% NaCI equiv. salinity. According to the calculated isochores, the pressure offormation ofthe Delbegetey emeralds can be estimated at 570-1240 bar.

More information

Item ID: 10221
DC Identifier: http://oa.upm.es/10221/
OAI Identifier: oai:oa.upm.es:10221
Official URL: http://minmag.geoscienceworld.org/
Deposited by: Biblioteca ETSI Minas y Energía
Deposited on: 03 Feb 2012 12:34
Last Modified: 20 Apr 2016 18:27
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM