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Apatite Composition of Representative Magnetite‐series and Ilmenite‐series Granitoids in Japan
Author(s) -
Ishihara Shunso,
Moriyama Takeru
Publication year - 2016
Publication title -
resource geology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.597
H-Index - 43
eISSN - 1751-3928
pISSN - 1344-1698
DOI - 10.1111/rge.12086
Subject(s) - ilmenite , magnetite , apatite , fluorapatite , geology , series (stratigraphy) , geochemistry , mineralogy , paleontology
Apatites of representative magnetite‐series and ilmenite‐series granitoids were studied in the Japanese Islands. Concentrations of the volatile components F, Cl and SO 3 are differently distributed in apatites of these granitoid series. Apatites are always fluoroapatite. They have weakly higher F content in the ilmenite series than in the magnetite series. In contrast, Cl and SO 3 , are significantly concentrated in apatites of the magnetite series compared to the ilmenite series. These characteristics reflect the original concentrations of these components in the host granitic magmas. A high fO 2 seems most important for the S‐concentration as sulfate in apatite of the magnetite series. REE and Y are only erratically high in the studied apatites.