Mantle sources and differentiation of alkaline magmatic suite of Lages, Santa Catarina, Brazil

被引：1

作者：

Traversa, G

Barbieri, M

Beccaluva, L

Coltorti, M

Conte, AM

Garbarino, C

Gomes, CB

Macciotta, G

Morbidelli, L

Ronca, S

Scheibe, LF

机构：

[1] UNIV FERRARA,INST MINERAL,I-44100 FERRARA,ITALY

[2] UNIV CAGLIARI,INST GIACIMENTI MINERARI,I-09123 CAGLIARI,ITALY

[3] UNIV SAO PAULO,INST GEOCIENCIAS,BR-01498 SAO PAULO,BRAZIL

[4] UNIV CAGLIARI,DIPARTIMENTO SCI TERRA,I-09100 CAGLIARI,ITALY

[5] UNIV PERUGIA,DIPARTIMENTO SCI TERRA,I-06100 PERUGIA,ITALY

[6] UNIV FED SANTA CATARINA,DEPT GEOCIENCIAS,FLORIANOPOLIS,SC,BRAZIL

来源：

EUROPEAN JOURNAL OF MINERALOGY | 1996年 / 8卷 / 01期

关键词：

igneous petrology; Sr-Nd isotopes; basanite-peralkaline phonolite; Brazil;

D O I：

暂无

中图分类号：

P57 [矿物学];

学科分类号：

070901 ;

摘要：

The alkaline-carbonatite district of Lages (Santa Catarina, Brazil) contains mafic-ultramafic and prevalent leucocratic bodies mainly composed of olivine melilitites, olivine nephelinites, basanites, phonotephrites, nepheline syenites and peralkaline phonolites. Kimberlitic pipe breccias and carbonatitic rocks are also present. Petrography, mineral and bulk-rock chemistry and mass balance calculations show that differentiated leucocratic rock-types can be derived by fractional crystallization processes from basanitic magmas. Trace element and Sr-Nd isotopic data suggest metasomatized mantle sources for the primary magmas and variable crystal contamination for the more differentiated rock-types.

引用

页码：193 / 208

页数：16

共 35 条

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