The Origin of Pseudoleucite in Tinguaite, Ghori, India: a Re-evaluation

被引：5
|
作者：
Viladkar, S. G. [1 ]
机构：
[1] St Xavier Coll, Dept Geol, Mumbai Carbonatite Res Ctr, Amba Dongar Kadipani 390117, India
来源：
PETROLOGY | 2010年 / 18卷 / 05期
关键词：
BEARPAW MOUNTAINS; ALKALINE ROCKS; LEUCITE; CLINOPYROXENES; PHONOLITE; MONTANA; GUJARAT;
D O I：
10.1134/S0869591110050061
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Pseudoleucite occurs as large megacrysts (giant phenocrysts) in tinguaite at Ghori which is located in the Panwad-Kawant carbonatite-alkalic complex, India. In thin sections the pseudoleucite crystals show mainly an oriented intergrowth of nepheline and orthoclase with additional minerals phases such as white mica, analcime, sodalite and cancrinite. From mineralogy and geochemistry it is inferred that the scheme involving subsolidus breakdown of leucite and subsequent reaction with Na-rich fluids can satisfactorily explain origin of pseudoleucite crystals in tinguaites.
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页码：544 / 554
页数：11
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