Open AccessOxygen isotope composition of zircons from the Talnakh economic intrusion of the Noril’sk province: first data
Author(s) -
I. Yu. Badanina,
Е. А. Белоусова,
К. N. Malitch,
S. F. Sluzhenikin
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524892170-173
Subject(s) - gabbro , geochemistry , diorite , geology , plagioclase , isotopes of oxygen , δ18o , layered intrusion , sulfide , mantle (geology) , intrusion , stable isotope ratio , zircon , igneous rock , chemistry , paleontology , quartz , physics , organic chemistry , quantum mechanics
This study presents the first results of oxygen isotope analyses (18O) collected on zircons from the Talnakh economic intrusion within the Norilsk province. Zircons from gabbro-diorite, gabbroic rocks of the layered series and plagioclase-bearing wehrlite have similar mantle-like mean 18O values (5,39 0,49; 5,64 0,48 and of 5,28 0,34, respectively), which differ from 18O in zircons from sulfide-bearing melanocratic troctolite with a taxitic texture in the lower part of the intrusion (mean 18O = 6,50 0,98). These new oxygen isotope data support (i) the mantle-derived origin of the primary magma(s), parental to the Talnakh intrusion, and (ii) possible involvement of a crustal component during the formation of sulfide-bearing taxitic-textured rocks.