TY - GEN

T1 - Composition of the gases from minerals of corundum-bearing rocks from the belomorian mobile belt (North Karelia, Russia)

AU - Akimova, Ekaterina

AU - Verchovsky, Alexander

AU - Kozlov, Evgeniy

AU - Lokhov, Kirill

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Isotopic composition of noble gases and other volatiles (CO2, N2) from minerals of corundum-bearing rocks with isotopically ultralight oxygen from Khitoostrov deposit have been investigated. The studies were conducted on Finesse mass-spectrometry system [1] using step heating in temperature range from 200ºС to 1400ºС. The following minerals were investigated: corundum, amphibole, garnet, staurolite. For the same samples, differential scanning calorimetry and thermogravimetry curves have been obtained. The first results of the studies show that the low-temperature (less than 400°C) release peaks of carbon dioxide and nitrogen probably represent a laboratory organic contamination. The middle-temperature release peaks (400-800ºC) are potentially consistent with decrepitation of fluid inclusions and diffusion of the gases from crystalline lattice of the minerals, and the high-temperature release peaks (900-1400ºC) possibly indicate the transformation of mineral structures such as amphibole and staurolite as a result of dehydration.

AB - Isotopic composition of noble gases and other volatiles (CO2, N2) from minerals of corundum-bearing rocks with isotopically ultralight oxygen from Khitoostrov deposit have been investigated. The studies were conducted on Finesse mass-spectrometry system [1] using step heating in temperature range from 200ºС to 1400ºС. The following minerals were investigated: corundum, amphibole, garnet, staurolite. For the same samples, differential scanning calorimetry and thermogravimetry curves have been obtained. The first results of the studies show that the low-temperature (less than 400°C) release peaks of carbon dioxide and nitrogen probably represent a laboratory organic contamination. The middle-temperature release peaks (400-800ºC) are potentially consistent with decrepitation of fluid inclusions and diffusion of the gases from crystalline lattice of the minerals, and the high-temperature release peaks (900-1400ºC) possibly indicate the transformation of mineral structures such as amphibole and staurolite as a result of dehydration.

KW - Corundum-bearing rocks

KW - Noble gas

KW - Thermal analysis

UR - http://www.scopus.com/inward/record.url?scp=85032461336&partnerID=8YFLogxK

U2 - 10.5593/sgem2017/11/S01.013

DO - 10.5593/sgem2017/11/S01.013

M3 - Conference contribution

AN - SCOPUS:85032461336

SN - 978-619-7105-98-8

VL - 17, Issue 11

T3 - International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM

SP - 103

EP - 108

BT - 17TH INTERNATIONAL MULTIDISCIPLINARY SCIENTIFIC GEOCONFERENCE SGEM 2017

PB - STEF92 Technology Ltd.

T2 - 17th International Multidisciplinary Scientific Geoconference, SGEM 2017

Y2 - 29 June 2017 through 5 July 2017

ER -