岩手県下閉伊郡川井村の含クロリトイド岩

大貫 仁

doi:10.2465/ganko1941.44.300

書誌事項

タイトル別名

On the chloritoid bearing rocks from Kawai, Shimohei-gun, Iwate Prefecture

説明

The chloritoid-bearing rocks derived from tuffaceous material have been found in Kawai, Shimohei-gun, Iwate Prefecture. These chloritoid-bearing rocks contain sericite and chlorite as index minerals of the quartz-albite-sericite-chlorite sub-facies in the green schist facies. As compared with so-called “Kitakami median zone” where cloritoid-bearing rocks are found in various zones of the contact metamorphic aureole of the Tono granodiorite intrusion, in this area, these rocks are found only in a lower grade zone. The chemical composition of these chloritoid-bearing and their related rocks are studied. The chemical composition, optical properties and X-ray powder diffraction data of the separated chloritoid by the isodynamic magnetic separator have been investigated. The chemical formura and optical properties of this chloritoid are<br> (Fe⁺⁺_0.74 Fe⁺⁺⁺_{0, 18} Mg_0.05 Ca_0.02 Mn_0.00)_0.99 Al_1.91 Si_1.08 (OH)_1.78 O_5.22 and α=1.721 β=1.725 γ=1.729 2V_γ=60°. These resulting data, nearly equal the nature of the theoretical chloritoid. Some geological and petrological consideration of these chloritoid-bearing rocks are discussed.

収録刊行物

岩石鉱物鉱床学会誌

岩石鉱物鉱床学会誌 44 (6), 300-306, 1960

一般社団法人　日本鉱物科学会

詳細情報詳細情報について

CRID: 1390001206216454400

NII論文ID: 130003883845

DOI: 10.2465/ganko1941.44.300

ISSN: 18830765; 00214825

データソース種別

JaLC
Crossref
CiNii Articles

抄録ライセンスフラグ: 使用不可

書き出し

問題の指摘