Terrestrial Cr-spinels in the Maiolica limestone : Where are they from?
(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
- Lenaz, Davide ; Schmitz, Birger LU and Alvarez, Walter
- organization
- publishing date
- 2019-09-11
- 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 >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}}, }