TY - GEN

T1 - Conditions of formation of the mesozoic igneous rocks of the dzheltula alkaline massif according to the results of mineralogical studies

AU - Ivanov, Alexey

AU - Kravchenko, Alexander

AU - Zhuravlev, Anatolii

AU - Loskutov, Evgeny

AU - Prokopiev, Ilya

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The paper reports the results of petrological calculations of some generations of rock-forming (pyroxene, amphibole, biotite) minerals and accessory minerals (zircon and apatite) from the Mesozoic igneous rocks of the poorly studied Dzheltula alkaline massif. It is the largest magmatic structure of the Tyrkanda ore region, located in the eastern part of the Aldan-Stanovoy shield. Obtained results of identification of physical-chemical conditions of pyroxene, amphibole and biotite crystallization indicate the fact, they were formed at various temperatures and at two deep levels. Based on the study of typomorphic features of accessory minerals (zircons, apatites) it is concluded that, during formation of the Dzheltula massif, two sources existed - of mantle and crust nature. It is concluded that, petrological characteristics of rock-forming and accessory minerals from the rocks of the Dzheltula massif reflect features of deep structure of the Earth’s crust. Obtained data indicate that, the typomorphism and chemical composition of zircons and apatites reflect formation conditions, features of host igneous rock composition and their geochemical specialization for such elements as U and Th.

AB - The paper reports the results of petrological calculations of some generations of rock-forming (pyroxene, amphibole, biotite) minerals and accessory minerals (zircon and apatite) from the Mesozoic igneous rocks of the poorly studied Dzheltula alkaline massif. It is the largest magmatic structure of the Tyrkanda ore region, located in the eastern part of the Aldan-Stanovoy shield. Obtained results of identification of physical-chemical conditions of pyroxene, amphibole and biotite crystallization indicate the fact, they were formed at various temperatures and at two deep levels. Based on the study of typomorphic features of accessory minerals (zircons, apatites) it is concluded that, during formation of the Dzheltula massif, two sources existed - of mantle and crust nature. It is concluded that, petrological characteristics of rock-forming and accessory minerals from the rocks of the Dzheltula massif reflect features of deep structure of the Earth’s crust. Obtained data indicate that, the typomorphism and chemical composition of zircons and apatites reflect formation conditions, features of host igneous rock composition and their geochemical specialization for such elements as U and Th.

KW - Aldan-Stanovoy shield

KW - Amphibole

KW - Mineralogy

KW - Petrology

KW - Pyroxene

UR - http://www.scopus.com/inward/record.url?scp=85073698039&partnerID=8YFLogxK

U2 - 10.5593/sgem2019/1.1/S01.014

DO - 10.5593/sgem2019/1.1/S01.014

M3 - Conference contribution

AN - SCOPUS:85073698039

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

SP - 109

EP - 116

BT - Education and Accreditation in Geosciences; Environmental Legislation, Multilateral Relations and Funding Opportunities

PB - International Multidisciplinary Scientific Geoconference

T2 - 19th International Multidisciplinary Scientific Geoconference, SGEM 2019

Y2 - 30 June 2019 through 6 July 2019

ER -