Authigenic monazite and xenotime from pelitic metacherts in pumpellyite-actinolite-facies conditions, Sestri-Voltaggio Zone, central Liguria, Italy

被引：46

作者：

Cabella, R ^{[1
]}

Lucchetti, G ^{[1
]}

Marescotti, P ^{[1
]}

机构：

[1] Univ Genoa, Dipartimento Studio Terr & Sue Risorse, I-16132 Genoa, Italy

来源：

CANADIAN MINERALOGIST | 2001年 / 39卷 / 03期

关键词：

monazite; xenotime; metapelite; chert; rare-earth elements; Liguria; Italy;

D O I：

10.2113/gscanmin.39.3.717

中图分类号：

P57 [矿物学];

学科分类号：

070901 [矿物学、岩石学、矿床学];

摘要：

Monazite-(Ce) and xenotime-(Y) were found in the metacherts (pumpellyite-actinolite-facies conditions: 3 less than or equal to P less than or equal to 4 kbars and 300 less than or equal to T less than or equal to 350 degreesC) of the Monte Figogna Unit, Sestri-Voltaggio Zone, Liguria, in Italy, as scattered submillimetric grains in pelitic beds and as euhedral crystals in both millimeter-thick quartz veins and open fissures. Their composition is comparable to those of known occurrences in metapelites from greenschist-facies conditions, The textural evidence points to a synmetamorphic authigenic origin of these phases related to local mobilization and reconcentration of the REE during the metamorphic recrystallization of the clay fraction.

引用

页码：717 / 727

页数：11

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