Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13°34' N

Olga Ageeva; Gerlinde Habler; Dan Topa; Thomas Waitz; Chen Li; Alexey Pertsev; Thomas Griffiths; Olga Zhilicheva; Rainer Abart

doi:10.2475/02.2016.01

Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13°34' N

Olga Ageeva (Corresponding author)
, Gerlinde Habler
, Dan Topa
, Thomas Waitz
, Chen Li
, Alexey Pertsev
, Thomas Griffiths
, Olga Zhilicheva
, Rainer Abart

Publications: Contribution to journal › Article › Peer Reviewed

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.

Original language	English
Pages (from-to)	85-109
Number of pages	25
Journal	American Journal of Science: an international earth science journal
Volume	316
Issue number	2
DOIs	https://doi.org/10.2475/02.2016.01
Publication status	Published - Feb 2016

Funding

This study was supported by grants of the Austrian Science foundation (FWF grant I 2066-N29) and the Russian Foundation for Basic Research (grants 14-05-91001 and 14-05-00958). We thank Elena Petrishcheva for consultations on the MatLab processing of EBSD data. We are grateful to Alexey Smirnov and an anonymous reviewer for their useful comments. Authors also would like to thank Boris Ye. Borutzky for helpful discussion.

Austrian Fields of Science 2012

103018 Materials physics

Keywords

Fe-Ti-oxide micro-inclusions
magnetite
clouded plagioclase
gabbro
plagiogranite
Mid-Atlantic ridge
crystallographic relations
electron back scatter diffraction
SINGLE-DOMAIN MAGNETITE
HYDROTHERMAL ALTERATION
REMANENCE ANISOTROPY
STILLWATER COMPLEX
PALEOINTENSITY
ROCKS
PALEOMAGNETISM
ORIGIN
CRYSTALLIZATION
DIFFERENTIATION
Clouded plagioclase
Electron back scatter diffraction
Magnetite
Gabbro
Plagiogranite
Crystallographic relations

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10.2475/02.2016.01

Cite this

Ageeva, O., Habler, G., Topa, D., Waitz, T., Li, C., Pertsev, A., Griffiths, T., Zhilicheva, O., & Abart, R. (2016). Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13°34' N. American Journal of Science: an international earth science journal, 316(2), 85-109. https://doi.org/10.2475/02.2016.01

@article{086de3ca39a144d4a7931f7d5a771072,

title = "Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13°34' N",

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.",

keywords = "Fe-Ti-oxide micro-inclusions, magnetite, clouded plagioclase, gabbro, plagiogranite, Mid-Atlantic ridge, crystallographic relations, electron back scatter diffraction, SINGLE-DOMAIN MAGNETITE, HYDROTHERMAL ALTERATION, REMANENCE ANISOTROPY, STILLWATER COMPLEX, PALEOINTENSITY, ROCKS, PALEOMAGNETISM, ORIGIN, CRYSTALLIZATION, DIFFERENTIATION, Clouded plagioclase, Electron back scatter diffraction, Magnetite, Gabbro, Plagiogranite, Crystallographic relations",

author = "Olga Ageeva and Gerlinde Habler and Dan Topa and Thomas Waitz and Chen Li and Alexey Pertsev and Thomas Griffiths and Olga Zhilicheva and Rainer Abart",

note = "Funding Information: This study was supported by grants of the Austrian Science foundation (FWF grant I 2066-N29) and the Russian Foundation for Basic Research (grants 14-05-91001 and 14-05-00958). We thank Elena Petrishcheva for consultations on the MatLab processing of EBSD data. We are grateful to Alexey Smirnov and an anonymous reviewer for their useful comments. Authors also would like to thank Boris Ye. Borutzky for helpful discussion.",

year = "2016",

month = feb,

doi = "10.2475/02.2016.01",

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Ageeva, O, Habler, G, Topa, D, Waitz, T, Li, C, Pertsev, A, Griffiths, T, Zhilicheva, O & Abart, R 2016, 'Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13°34' N', American Journal of Science: an international earth science journal, vol. 316, no. 2, pp. 85-109. https://doi.org/10.2475/02.2016.01

Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13°34' N. / Ageeva, Olga (Corresponding author); Habler, Gerlinde; Topa, Dan et al.
In: American Journal of Science: an international earth science journal, Vol. 316, No. 2, 02.2016, p. 85-109.

Publications: Contribution to journal › Article › Peer Reviewed

TY - JOUR

T1 - Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13°34' N

AU - Ageeva, Olga

AU - Habler, Gerlinde

AU - Topa, Dan

AU - Waitz, Thomas

AU - Li, Chen

AU - Pertsev, Alexey

AU - Griffiths, Thomas

AU - Zhilicheva, Olga

AU - Abart, Rainer

N1 - Funding Information: This study was supported by grants of the Austrian Science foundation (FWF grant I 2066-N29) and the Russian Foundation for Basic Research (grants 14-05-91001 and 14-05-00958). We thank Elena Petrishcheva for consultations on the MatLab processing of EBSD data. We are grateful to Alexey Smirnov and an anonymous reviewer for their useful comments. Authors also would like to thank Boris Ye. Borutzky for helpful discussion.

PY - 2016/2

Y1 - 2016/2

N2 - 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.

AB - 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.

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KW - magnetite

KW - clouded plagioclase

KW - gabbro

KW - plagiogranite

KW - Mid-Atlantic ridge

KW - crystallographic relations

KW - electron back scatter diffraction

KW - SINGLE-DOMAIN MAGNETITE

KW - HYDROTHERMAL ALTERATION

KW - REMANENCE ANISOTROPY

KW - STILLWATER COMPLEX

KW - PALEOINTENSITY

KW - ROCKS

KW - PALEOMAGNETISM

KW - ORIGIN

KW - CRYSTALLIZATION

KW - DIFFERENTIATION

KW - Clouded plagioclase

KW - Electron back scatter diffraction

KW - Magnetite

KW - Gabbro

KW - Plagiogranite

KW - Crystallographic relations

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U2 - 10.2475/02.2016.01

DO - 10.2475/02.2016.01

M3 - Article

SN - 0002-9599

VL - 316

SP - 85

EP - 109

JO - American Journal of Science: an international earth science journal

JF - American Journal of Science: an international earth science journal

IS - 2

ER -

Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13°34' N

Abstract

Funding

Austrian Fields of Science 2012

Keywords

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