Isotopic (Sr,Nd, O) systematics of the high Sr-Ba Late Miocene granitoid intrusions from the Caucasian Mineral Waters region |
| |
| Authors: | E O Dubinina A A Nosova A S Avdeenko L Ya Aranovich |
| |
| Institution: | 1.Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry,Russian Academy of Sciences,Moscow,Russia |
| |
| Abstract: | This paper is dedicated to the interpretation of isotope-geochemical data on high Sr-Ba granitoids exemplified by their typical
representatives—Late Miocene laccoliths of the Caucasian Mineral Waters (CMW). These massifs are made up of amphibole granites,
granosyenites, syenites, and leucogranites, which show particular behavior of Sr, Nd, and O isotope systems. The syenites
and granosyenites are characterized by δ18O variations from 8 to 10‰. As compared to them, the amphibole granites have lowered (up to 7‰), while leucogranites, elevated
(up to 12.5–13.7‰) oxygen isotope compositions. The (87Sr/86Sr)8.3 ratio in the granitoids accounts for 0.7083–0.7086, whereas σNd(T) varies from −4.2 to −2.1. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
