Can low-titanium lamproite magmas produce ore deposits? Evidence from Mesozoic Aldan Shield lamproites

Авторы: Chayka I.F., Izokh A.E., Vasyukova Ye A.
Сборник: Life with Ore Deposits on Earth – 15th SGA Biennial Meeting 2019, Volume 4
Том: 4
Тезисы
Год издания: 2019
Место издания: Glazgow
Первая страница: 1850
Последняя страница: 1854
Аннотация: Lamproites and lamprophyres fromRyabinovoye gold deposit (Aldan Shield, Siberia) werestudied. We demonstrate that these rocks, varying fromOl-Di-Phl-lamproites to syenite-porphyries, form acontinuous series of lamproite magma differentiation. Atthe stage of phlogopite and clinopyroxene crystallization,silicate-carbonate and then carbonate-salt immiscibilitiesoccur. A suggestion is that during these processes LREE,Y, U, Sr and Ba distribute to a phosphate-fluoride fractionand probably accumulate in apatite-fluorite gangues.Based on our results and considering existing data onorebearing massifs within Central Aldan (Inagli, Ryabinoviy)and also of the Nam-Xe ore-bearing province (Vietnam),we concluded that Au, PGE and Th-U-Ba-REE depositscan be genetically connected with low-titanium lamproitemagmas
Добавил в систему: Чайка Иван Федорович

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