Stable isotope evidence for a marine origin of ophicalcites from the north-central Apennines (Italy)

Barbieri, Mário; Masi, Umberto; Tolomeo, L.

doi:10.1016/0025-3227(79)90015-x

Cited by 24 publications

(22 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The carbon isotope compositions of the studied ophicalcite samples range from -0.1 to 1.7‰ indicating a normal marine origin (e.g. Hoefs 1987), in agreement with other studies on ophicarbonate rocks (Barbieri et al 1979;Lemoine et al 1983;Weissert and Bernoulli 1984;Früh-Green et al 1990;Driesner 36 A. Demény et al Central European Geology 50, 2007 Pozzorini and Früh-Green 1996). This carbon isotope range implies that the calcite may have been precipitated from hydrothermal solutions of seawater origin (containing dissolved carbonate, bicarbonate and CO 2 with a total δ 13 C of about 0‰), or may have been derived from the mechanical mixing of sedimentary carbonate and silicate material and subsequent recrystallization during the metamorphic events.…”

Section: Formation Conditions Of Ophicalcitesupporting

confidence: 89%

Stable isotope compositions of the Penninic ophiolites of the Kõszeg-Rechnitz series

Demény¹,

Vennemann²,

Koller³

2007

Central European Geology

View full text Add to dashboard Cite

The ophiolitic rocks of the easternmost Penninic unit, the Kõszeg-Rechnitz series, were analyzed for their H, C and O stable isotope compositions. Serpentinite, gabbro, blueschist, talc deposits, ophicarbonates, as well as calcite and inclusion fluids from quartz segregation veins were analyzed in order to determine the effects of different metamorphic events on the stable isotope compositions.The oxygen isotope compositions have a wide range depending on rock type and locality. Gabbro and serpentinite of Bienenhütte (Bernstein Window) have preserved mantle-like δ 18 O values (5.9 to 6.3‰; all values are in ‰ relative to V-SMOW), whereas the serpentinite of Glashütten and Rumpersdorf (Kõszeg-Rechnitz Window) and the silicate minerals of the ophicarbonate rocks show a strong 18 O-enrichment (up to 16.2‰). The 18 O-enrichment may have been induced by lowtemperature serpentinization or interaction with 18 O-rich fluids that had been in equilibrium with sedimentary rocks. Contrary to the O isotope compositions, the H isotope compositions seem to be homogeneous in the entire series, with D values of -63 ± 7‰. Only some serpentinite rocks were depleted in D (down to -106‰), usually regarded as a result of interaction with meteoric water infiltrating during late-stage metamorphism. The meteoric water infiltration was rather limited, as even samples taken directly from slickensides within serpentinite bodies preserved isotopic compositions close to those of the bulk series. H and O isotope compositions of fluids mobilized in the metasedimentary rocks of the Penninic unit during the main metamorphic stage were determined by analyzing inclusion fluids and calcites in quartz-carbonate veins. The isotope compositions indicate interaction between these fluids and the ophiolite series, although relative deuterium enrichment has been preserved in the ophiolitic rocks.The strong D-enrichment characteristic for oceanic crust that has experienced high-temperature interaction with seawater was not detected. However, the H isotope compositions obtained for the Kõszeg-Rechnitz series indicate that subduction of the Penninic oceanic crust and the associated devolatilization may have been potentially responsible for mantle metasomatism, resulting in H Addresses: A. Demény: H-1112 Budapest, Budaörsi út 45, Hungary, e-mail: demeny@geochem.hu T. W. Vennemann: L'Anthropole, CH-1015 Lausanne, Switzerland F. Koller: Althanstr. 14, 1090 Vienna, Austria Received: January 2, , accepted: March 28, 2007 1788-2281/$ 20.00 © 2007 Akadémiai Kiadó, Budapest Central European Geology, Vol. 50/1, pp. 29-46 (2007 DOI: 10.155610. /CEuGeol.50.2007 isotope compositions of about -40‰, similar to the range determined from mantle-derived amphibole megacrysts (Demény et al. 2005). To conclude, the present dataset is discussed in the light of earlier studies on the formation of the Sopron leucophyllite.

show abstract

Section: Formation Conditions Of Ophicalcitesupporting

confidence: 89%

Stable isotope compositions of the Penninic ophiolites of the Kõszeg-Rechnitz series

Demény¹,

Vennemann²,

Koller³

2007

Central European Geology

View full text Add to dashboard Cite

show abstract

“…In these environments, carbonate veins may represent paleo-stockwork systems similar to those beneath the LCHF (Kelley et al, 2005). Oxygen isotopes of carbonate material in ophicalcite veins indicate paleo fluid temperatures of <150°C (Barbieri et al, 1979;Weissert and Bernoulli, 1984;Früh-Green et al, 1990;Treves and Harper, 1994) similar to those at Lost City (Frü h-Green et al, 2003).…”

Section: Comparison Of Lost City To Other Environmentsmentioning

confidence: 92%

Formation and evolution of carbonate chimneys at the Lost City Hydrothermal Field

Ludwig¹,

Kelley²,

Butterfield³

et al. 2006

Geochimica et Cosmochimica Acta

212

229

View full text Add to dashboard Cite

“…Yellow rectangle containing black dots: aragonite in serpentinized peridotites dredged from the Mid-Atlantic Ridge (Bonatti et al 1980). Black dashed rectangle: calcite in Ligurian and Appenine ophicalcite deposits, ranging from lower (heavy δ 18 O) to higher metamorphic grade (light δ 18 O; Barbieri et al 1979). White rectangles containing diagonal black lines: (right) calcite in oceanic ophicarbonates affected by later Alpine regional metamorphism (Früh-Green et al 1990); (left) calcite in contact-metamorphosed ophicarbonates in the Bergell aureole, Val Malenco (Abart & Pozzorini 2000, Pozzorini & Früh-Green 1996.…”

Section: Stable Isotope Data: Mineral Crystallization Thermometrymentioning

confidence: 99%

Rates and Mechanisms of Mineral Carbonation in Peridotite: Natural Processes and Recipes for Enhanced, in situ CO₂ Capture and Storage

Kelemen

Matter

Streit

et al. 2011

Annu. Rev. Earth Planet. Sci.

399

408

View full text Add to dashboard Cite

Near-surface reaction of CO 2 -bearing fluids with silicate minerals in peridotite and basalt forms solid carbonate minerals. Such processes form abundant veins and travertine deposits, particularly in association with tectonically exposed mantle peridotite. This is important in the global carbon cycle, in weathering, and in understanding physical-chemical interaction during retrograde metamorphism. Enhancing the rate of such reactions is a proposed method for geologic CO 2 storage, and perhaps for direct capture of CO 2 from near-surface fluids. We review, synthesize, and extend inferences from a variety of sources. We include data from studies on natural peridotite carbonation processes, carbonation kinetics, feedback between permeability and volume change via reaction-driven cracking, and proposed methods for enhancing the rate of natural mineral carbonation via in situ processes ("at the outcrop") rather than ex situ processes ("at the smokestack"). 545 Annu. Rev. Earth Planet. Sci. 2011.39:545-576. Downloaded from www.annualreviews.org by University of British Columbia on 10/27/12. For personal use only.

show abstract

Stable isotope evidence for a marine origin of ophicalcites from the north-central Apennines (Italy)

Cited by 24 publications

References 15 publications

Stable isotope compositions of the Penninic ophiolites of the Kõszeg-Rechnitz series

Stable isotope compositions of the Penninic ophiolites of the Kõszeg-Rechnitz series

Formation and evolution of carbonate chimneys at the Lost City Hydrothermal Field

Rates and Mechanisms of Mineral Carbonation in Peridotite: Natural Processes and Recipes for Enhanced, in situ CO₂ Capture and Storage

Contact Info

Product

Resources

About

Stable isotope evidence for a marine origin of ophicalcites from the north-central Apennines (Italy)

Cited by 24 publications

References 15 publications

Stable isotope compositions of the Penninic ophiolites of the Kõszeg-Rechnitz series

Stable isotope compositions of the Penninic ophiolites of the Kõszeg-Rechnitz series

Formation and evolution of carbonate chimneys at the Lost City Hydrothermal Field

Rates and Mechanisms of Mineral Carbonation in Peridotite: Natural Processes and Recipes for Enhanced, in situ CO2 Capture and Storage

Contact Info

Product

Resources

About

Rates and Mechanisms of Mineral Carbonation in Peridotite: Natural Processes and Recipes for Enhanced, in situ CO₂ Capture and Storage