Stable isotope constraints on the origin of the Cabe de Creus garnet-tourmaline pegmatites, Massif des Alberes, eastern Pyrenees, Spain

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Authors:Damm, Klaus-Werner; Harmon, Russell S.; Heppner, Peter-Michael; Dornsiepen, Ulrich
Author Affiliations:Primary:
South. Methodist Univ., Stable Isot. Lab., Dallas, TX, United States
Other:
Nat. Environ. Res. Counc., United Kingdom
Freie Univ. Berlin, Federal Republic of Germany
Volume Title:Geological Journal
Source:Geological Journal, 27(1), p.75-86. Publisher: Wiley & Sons, Chichester-New York, United Kingdom. ISSN: 0072-1050
Publication Date:1992
Note:In English. 32 refs.; illus. incl. 1 table, geol. sketch map
Summary:These pegmatite dyke swarms intrude high-grade Cambro-Ordovician metasediments but do not show obvious relationships to Hercynian intrusive rocks. Quartz, microcline, albite, idiomorphic garnet, acicular tourmaline and folded muscovite characterize the early series of pegmatite veins. A second series of pegmatites shows no deformation, lack 'disharmonic fibrolite' and are fine-grained. Equilibrium O-isotope fractionations at approx 600 degrees C, lack of subsolidus exchange, and H- and O-isotopic signatures of water in equilibrium with mica and quartz and other data suggest derivation of the pegmatites from anatexis of metapelites at shallow crustal levels. [R.K.H.]
Subjects:D/H; Deuterium; Geochemistry; Granites; Hydrogen; Igneous rocks; Isotopes; O-18/O-16; Oxygen; Pegmatite; Petrology; Plutonic rocks; Stable isotopes; Europe; Iberian Peninsula; Pyrenees; Southern Europe; Spain; Spanish Pyrenees; Alberes Massif; Cabo de Creus
Abstract Numbers:92M/4299
Record ID:1992068873
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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