Sr-rich minerals in a carbonatite skarn, Fuerteventura, Canary Islands (Spain)

A. Ahijado, R. Casillas, G. Nagy, Carlos Fernández

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Metamorphosed carbonatites and related skarn deposits, located in Fuerteventura Basal Complex, contain unusual Sr-rich minerals. Maximum SrO concentration in the following minerals are: calcite, 7.23 wt%; apatite, 5.22 wt%; epidote, 11.64 wt%; clinozoisite, 1.25 wt%; allanite, 5.63 wt%; britholite, 4.11 wt% and a Sr-Na aluminosilicate (probably stronalsite), 16.44 wt% SrO. Calcite and apatite are chemically similar to those found in carbonatites and are therefore considered to be of igneous origin. Textural evidence indicates that the first skarn stage garnet+diopside+Sr-Na aluminosilicate formed as the result of chemical interaction between carbonatites and adjacent silicate rocks. The formation of Sr-bearing epidote/clinozoisite, allanite and britholite appears to be related to the release of Sr into the fluid phase from the breakdown of high temperature assemblages during the retrograde skarn stage. During the final evolution stages, further alteration of britholite by bastnäsite and törnebohmite took place. The occurrence of REE minerals shows that the fluids responsible for this metasomatism must also have transported significant quantities of REE.

Original languageEnglish
Pages (from-to)107-127
Number of pages21
JournalMineralogy and Petrology
Volume84
Issue number1-2
DOIs
Publication statusPublished - May 2005

Fingerprint

britholite
Canary Islands
carbonatite
skarn
Spain
clinozoisite
Minerals
Apatites
allanite
Calcium Carbonate
minerals
aluminosilicate
apatites
epidote
calcite
apatite
rare earth element
Bearings (structural)
mineral
Silicates

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Sr-rich minerals in a carbonatite skarn, Fuerteventura, Canary Islands (Spain). / Ahijado, A.; Casillas, R.; Nagy, G.; Fernández, Carlos.

In: Mineralogy and Petrology, Vol. 84, No. 1-2, 05.2005, p. 107-127.

Research output: Contribution to journalArticle

Ahijado, A. ; Casillas, R. ; Nagy, G. ; Fernández, Carlos. / Sr-rich minerals in a carbonatite skarn, Fuerteventura, Canary Islands (Spain). In: Mineralogy and Petrology. 2005 ; Vol. 84, No. 1-2. pp. 107-127.
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