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Terrestrial Cr-spinels in the Maiolica limestone : Where are they from?

Lenaz, Davide ; Schmitz, Birger LU and Alvarez, Walter (2019) In Special Paper of the Geological Society of America 542. p.121-131
Abstract

In total, 33 and 65 chrome-spinel (Cr-spinel) grains in the >63 and 32–63 µm size fractions, respectively, were recovered from 12 beds in two stratigraphically separated groups along the 240-m-thick Monte Acuto section of the Maiolica limestone in central Italy, spanning from the Berriasian to the early Hauterivian. The chemistry of these detrital spinels suggests they may represent windblown ophiolitic detritus, showing the evolution of an ophiolite evolving from a mid-ocean-ridge basalt setting (Bosso section) to a suprasubduction-zone setting, including a backarc and an arc setting (Monte Acuto section). The source of the Maiolica detrital minerals may have been the obducting ophiolites of the Albanides and/or the Hellenides,... (More)

In total, 33 and 65 chrome-spinel (Cr-spinel) grains in the >63 and 32–63 µm size fractions, respectively, were recovered from 12 beds in two stratigraphically separated groups along the 240-m-thick Monte Acuto section of the Maiolica limestone in central Italy, spanning from the Berriasian to the early Hauterivian. The chemistry of these detrital spinels suggests they may represent windblown ophiolitic detritus, showing the evolution of an ophiolite evolving from a mid-ocean-ridge basalt setting (Bosso section) to a suprasubduction-zone setting, including a backarc and an arc setting (Monte Acuto section). The source of the Maiolica detrital minerals may have been the obducting ophiolites of the Albanides and/or the Hellenides, which show a similar evolution. In this case, it is particularly important to note how the Cr-spinel detritus in the Maiolica limestone records this evolution over a relatively short period of time, lasting ~10 m.y.

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author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
250 Million Years of Earth History in Central Italy: Celebrating 25 Years of the Geological Observatory of Coldigioco
series title
Special Paper of the Geological Society of America
editor
Koeberl, Christian and Bice, David M
volume
542
pages
11 pages
publisher
Geological Society of America
external identifiers
  • scopus:85090141422
ISSN
0072-1077
DOI
10.1130/2019.2542(06)
language
English
LU publication?
yes
id
b030d604-dabb-42ee-8fa0-96b51cbcab19
date added to LUP
2020-09-28 10:31:47
date last changed
2022-03-26 06:41:42
@inbook{b030d604-dabb-42ee-8fa0-96b51cbcab19,
  abstract     = {{<p>In total, 33 and 65 chrome-spinel (Cr-spinel) grains in the &gt;63 and 32–63 µm size fractions, respectively, were recovered from 12 beds in two stratigraphically separated groups along the 240-m-thick Monte Acuto section of the Maiolica limestone in central Italy, spanning from the Berriasian to the early Hauterivian. The chemistry of these detrital spinels suggests they may represent windblown ophiolitic detritus, showing the evolution of an ophiolite evolving from a mid-ocean-ridge basalt setting (Bosso section) to a suprasubduction-zone setting, including a backarc and an arc setting (Monte Acuto section). The source of the Maiolica detrital minerals may have been the obducting ophiolites of the Albanides and/or the Hellenides, which show a similar evolution. In this case, it is particularly important to note how the Cr-spinel detritus in the Maiolica limestone records this evolution over a relatively short period of time, lasting ~10 m.y.</p>}},
  author       = {{Lenaz, Davide and Schmitz, Birger and Alvarez, Walter}},
  booktitle    = {{250 Million Years of Earth History in Central Italy: Celebrating 25 Years of the Geological Observatory of Coldigioco}},
  editor       = {{Koeberl, Christian and Bice, David M}},
  issn         = {{0072-1077}},
  language     = {{eng}},
  month        = {{09}},
  pages        = {{121--131}},
  publisher    = {{Geological Society of America}},
  series       = {{Special Paper of the Geological Society of America}},
  title        = {{Terrestrial Cr-spinels in the Maiolica limestone : Where are they from?}},
  url          = {{http://dx.doi.org/10.1130/2019.2542(06)}},
  doi          = {{10.1130/2019.2542(06)}},
  volume       = {{542}},
  year         = {{2019}},
}