Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13°34' N
- Author(s)
- Olga Ageeva, Gerlinde Habler, Dan Topa, Thomas Waitz, Chen Li, Alexey Pertsev, Thomas Griffiths, Olga Zhilicheva, Rainer Abart
- Abstract
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(s)
- Department of Lithospheric Research, Physics of Nanostructured Materials, Department of Geology
- External organisation(s)
- Russian Academy of Sciences, Naturhistorisches Museum Wien (NHM)
- Journal
- American Journal of Science: an international earth science journal
- Volume
- 316
- Pages
- 85-109
- No. of pages
- 25
- ISSN
- 0002-9599
- DOI
- https://doi.org/10.2475/02.2016.01
- Publication date
- 02-2016
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Keywords
- ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/plagioclase-hosted-fetioxide-microinclusions-in-an-oceanic-gabbroplagiogranite-association-from-the-mid-atlantic-ridge-at-1334-n(086de3ca-39a1-44d4-a793-1f7d5a771072).html