| Инд. авторы: | Shapovalova M., Tolstykh N., Shelepaev R., Cherdantseva M. |
| Заглавие: | Petrology of Ortsog-Uul peridotite-gabbro massif in Western Mongolia |
| Библ. ссылка: | Shapovalova M., Tolstykh N., Shelepaev R., Cherdantseva M. Petrology of Ortsog-Uul peridotite-gabbro massif in Western Mongolia // IOP Conference Series: Earth and Environmental Science. - 2018. - Vol.110. - Iss. 1. - Art.012020. - ISSN 1755-1307. - EISSN 1755-1315. |
| Внешние системы: | DOI: 10.1088/1755-1315/110/1/012020; РИНЦ: 35518815; SCOPUS: 2-s2.0-85040734152; WoS: 000435400500020; |
| Реферат: | eng: The Ortsog-Uul mafic-ultramafic massif of Western Mongolia is located in a tectonic block with overturned bedding. The massif hosts two intrusions: a rhythmically-layered peridotite-gabbro association (Intrusion 1) and massive Bt-bearing amphibole-olivine gabbro (Intrusion 2). Intrusions 1 and 2 have different petrology features. Early Intrusion 1 (278±2.5Ma) is characterized by lower concentrations of alkalis, titanium and phosphorus than late Intrusion 2 (272±2Ma). The chondrite-normalized REE and primitive mantle-normalized rare elements patterns of Ortsog-Uul intrusions have similar curves of elements distribution. However, Intrusion 2 is characterized higher contents of REE and rare elements. High concentrations of incompatible elements are indicative of strong fractionation process. It has been suggested that Intrusions 1 and 2 derived from compositionally different parental melts. Model calculations (COMAGMAT-3.57) show that parental melts of two intrusions were close to high-Mg picrobasaltic magmas. The concentration of MgO in melt is 16.21 (Intrusion 1) and 16.17 (Intrusion 2). Isotopic data of Ortsog-Uul magmatic rocks exhibit different values of ϵNd (positive and negative) for Intrusion 1 and 2, respectively. © Published under licence by IOP Publishing Ltd. |
| Ключевые слова: | Tectonic blocks; Model calculations; Magmatic rock; Isotopic data; Incompatible element; Mercury (metal); Elements distribution; Silicate minerals; Rocks; Petrology; Magnesium compounds; Fractionation process; Ultramafic massifs; |
| Издано: | 2018 |
| Физ. характеристика: | 012020 |
| Конференция: | Название: 9th All Russian Petrographic Conference with International Participation: Petrology of Magmatic and Metamorphic Complexes Даты проведения: 2017-11-28 - 2017-12-02 |