Mineralogical and trace element composition of clay-sized fractions from Albian siliciclastic rocks (Oliete Basin, NE Spain)
| Autor: | J. M. González López, M. J. Mayayo, Blanca Bauluz, C. Fernández-Nieto, Alfonso Yuste |
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| Rok vydání: | 2005 |
| Předmět: |
Cassiterite
Geochemistry Mineralogy 020101 civil engineering 02 engineering and technology engineering.material 010502 geochemistry & geophysics 01 natural sciences 0201 civil engineering Geochemistry and Petrology Monazite Illite engineering Kaolinite Siliciclastic Pyrite Clay minerals Geology 0105 earth and related environmental sciences Zircon |
| Zdroj: | Clay Minerals. 40:565-580 |
| ISSN: | 1471-8030 0009-8558 |
| DOI: | 10.1180/0009855054040193 |
| Popis: | Mineralogical and geochemical techniques have been used to determine the role of minerals in controlling the trace element composition of a set of clay-sized fractions from Albian siliciclastic rocks in NE Spain. These clay-sized fractions are composed of kaolinite and illite, minor quantities of quartz, and accessory heavy minerals. Kaolinite has a smaller crystal size than illite, accounting for its relative concentration in these fractions. The µm-sized heavy minerals are rutile, Fe-Ti- and Fe-oxides, zircon, pyrite, cassiterite, monazite and xenotime. Geochemical data indicate that most of the trace elements are relatively concentrated in clay-sized fractions, except for Zr, Hf, Y and HREE. Statistical treatment shows three different associations in the clay-sized fractions: (1) Rb, Cs and Ba with clay phyllosilicates, especially illite; (2) REE with Th, Y and P phases; and (3) Sc, Cr and V with Ti- and Nb oxides. Therefore, these data do not support the dominant REE control by clay mineralogy that other authors have reported. |
| Databáze: | OpenAIRE |
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