Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13°34' N
- Autor(en)
- Olga Ageeva, Gerlinde Habler, Dan Topa, Thomas Waitz, Chen Li, Alexey Pertsev, Thomas Griffiths, Olga Zhilicheva, Rainer Abart
- Abstrakt
Shape and lattice orientation relations as well as chemical compositions of Fe-Ti-oxide micro-inclusions and plagioclase host crystals in rocks of a gabbroplagiogranite assemblage from the Mid-Atlantic ridge at 13°34' N were studied using electron back scatter diffraction, transmission electron microscopy and field-emission gun-electron microprobe analyzer. Several evolutionary stages of the micro-inclusionhost assemblages were discerned, starting with precipitation of Fe-Ti-oxides from a super-saturated plagioclase in otherwise unaltered gabbro, followed by transformation and re-crystallization of the micro-inclusions as well as chemical alteration of both inclusions and host during plagiogranite intrusion and subsequent hydrothermal alteration. A detailed sequence of petrogenetic processes could be reconstructed. Fe-Ti-oxide micro-inclusions are the main carriers of the paleo-magnetic record of these rocks, and understanding the transformations affecting Fe-Ti-oxide microinclusions in the highly dynamic mid-ocean ridge environment is crucial for interpreting paleo-magnetic data.
- Organisation(en)
- Department für Lithosphärenforschung, Physik Nanostrukturierter Materialien, Institut für Geologie
- Externe Organisation(en)
- Russian Academy of Sciences, Naturhistorisches Museum Wien (NHM)
- Journal
- American Journal of Science: an international earth science journal
- Band
- 316
- Seiten
- 85-109
- Anzahl der Seiten
- 25
- ISSN
- 0002-9599
- DOI
- https://doi.org/10.2475/02.2016.01
- Publikationsdatum
- 02-2016
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103018 Materialphysik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Earth and Planetary Sciences(all)
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/plagioclase-hosted-fetioxide-microinclusions-in-an-oceanic-gabbroplagiogranite-association-from-the-mid-atlantic-ridge-at-1334-n(086de3ca-39a1-44d4-a793-1f7d5a771072).html