New experimental evidence on cluster-type vaporization of feldspars
- Authors: Gerasimov M.V.1, Dikov Y.P.1,2, Yakovlev O.I.1,3
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Affiliations:
- Institute for Space Research
- Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
- Vernadsky Institute of Geochemistry and Analytical Chemistry
- Issue: Vol 24, No 1 (2016)
- Pages: 49-74
- Section: Article
- URL: https://journals.rcsi.science/0869-5911/article/view/177427
- DOI: https://doi.org/10.1134/S0869591116010045
- ID: 177427
Cite item
Abstract
This paper reports experimental data on the investigation of the chemical composition of condensed silicate matter produced during the high-temperature pulse vaporization of feldspars. The experiments simulated the conditions of vaporization accompanying a high-velocity impact. Samples of albite, bytownite, calcic and sodic labradorite, and sanidine were used in the experiments. The investigation of the condensate layers obtained in the experiments included the determination of element distribution and structural characteristics of the materials using layer-by-layer X-ray photoelectron spectroscopy. It was shown that the vaporization of the samples occurred mainly through the release of complex atom–molecule groups referred to as clusters. “Nepheline,” “wollastonite,” and “sillimanite” clusters were identified as characteristic groups. The thermodynamic evaluation of melt composition at temperatures up to 5000 K performed using the Magma program confirmed high activities of these components in feldspar melts.
About the authors
M. V. Gerasimov
Institute for Space Research
Author for correspondence.
Email: mgerasim@mx.iki.rssi.ru
Russian Federation, ul. Profsoyuznaya 84/32, Moscow, 117997
Yu. P. Dikov
Institute for Space Research; Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
Email: mgerasim@mx.iki.rssi.ru
Russian Federation, ul. Profsoyuznaya 84/32, Moscow, 117997; Staromonetnyi per. 35, Moscow, 119017
O. I. Yakovlev
Institute for Space Research; Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: mgerasim@mx.iki.rssi.ru
Russian Federation, ul. Profsoyuznaya 84/32, Moscow, 117997; ul. Kosygina 19, Moscow, 119991