F-BEARING TITANIAN HYDROANDRADITE AND FLUORIAN GARNET (SPE39GRO31ALM23AND6) IN THE GRANITOIDS FROM THE SANTA-CATARINA FLUORITE DISTRICT (BRAZIL) - MINERALOGICAL DESCRIPTION, MECHANISM OF FLUORINE INCORPORATION, PETROLOGICAL AND METALLOGENIC SIGNIFICANCE

被引：0

作者：

BARBANSON, L ^{[1
]}

NETO, ACB ^{[1
]}

机构：

[1] UNIV FED SANTA CATARINA,DEPT GEOCIENCIAS,BR-88049 FLORIANOPOLIS,SC,BRAZIL

来源：

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II | 1992年 / 314卷 / 01期

关键词：

D O I：

暂无

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Two types of fluorian-garnet have been found in the granitoids of Santa Calarina. The first one is a titanian hydroandrodile (containing up to 4.6 wt % P which replaces OH) occurring with a while alteration mica. The second is a garnet (Spe39Gro31Alm23And6) containing up to 1.9 wt % P present in the magmatic paragenesis of a molybdenite-bearing leucogranite. In this case a possible mechanism of fluorine incorporation would be: sqare(VI), (Mn2+, Fe2+)VI, 4 P- = 2(Al3+)VI, 4 O2-. Chemical variation in the rim of the second garnet would probably register the effect of demixion of a fluid at the time of the first Mo mineralization stage.

引用

页码：63 / 69

页数：7