Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/10623
DC Field | Value | Language |
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dc.date.accessioned | 2017-11-06T09:27:13Z | en |
dc.date.available | 2017-11-06T09:27:13Z | en |
dc.date.issued | 2018-01 | en |
dc.identifier.uri | http://hdl.handle.net/2122/10623 | en |
dc.description.abstract | Hyperalkaline mineral springs related to active continental serpentinization are a theme of growing interest since they may contain significant amounts of abiotic gas and have important implications for energy resource exploration, subsurface microbiology and astrobiology.We report the discovery of a new hyperalkaline (pH~12) spring issuing in the Agioi Anargyroi monastery at Ermioni (Greece), connected to serpentinization of peridotites of the Argolis ophiolite. Two water samples have been collected from separated springs and analysed for the chemical composition of major, minor and trace elements, and isotopic composition (2H and 18O) of water by IC, ICP-OES, ICP-MS and IRMS, and for the chemical (H2, O2, N2, CH4, CO2 and C2H6) and isotopic (He, d2H-CH4 and d13C-CH4) composition of dissolved gases. The Iliokastron M elange Unit, comprising abundant serpentinized harzburgite, represent the aquifer feeding the hyperalkaline springs. The isotopic composition of water indicates a recent meteoric recharge probably through the close by and stratigraphically higher limestones of the Faniskos Unit. The Ca-OH water composition resulted to be similar to other hyperalkaline waters of Greece and worldwide. Although the concentrations of dissolved H2 are very low (tens of nmol/L) compared to other gases collected in similar manifestations, the concentrations of CH4 are considerable (38-314 mmol/L) and display isotopic compositions indicating a substantial if not exclusive abiogenic origin. Methane oxidation is also hypothesized in one of the two springs. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Marine and petroleum geology | en |
dc.relation.ispartofseries | /89 (2018) | en |
dc.rights | CC0 1.0 Universal | en |
dc.rights.uri | http://creativecommons.org/publicdomain/zero/1.0/ | en |
dc.subject | Hydrogeochemistry | en |
dc.subject | gas geochemistry | en |
dc.subject | Serpentinization | en |
dc.subject | Abiogenic methane | en |
dc.subject | Stable isotopes | en |
dc.subject | Biologic methane oxidation | en |
dc.title | Water chemistry and abiogenic methane content of a hyperalkaline spring related to serpentinization in the Argolida ophiolite (Ermioni, Greece) | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 185-193 | en |
dc.identifier.URL | http://www.sciencedirect.com/science/article/pii/S0264817217300387?via%3Dihub | en |
dc.subject.INGV | 04. Solid Earth | en |
dc.identifier.doi | 10.1016/j.marpetgeo.2017.01.028 | en |
dc.description.obiettivoSpecifico | 6A. Geochimica per l'ambiente e geologia medica | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | D'Alessandro, Walter | en |
dc.contributor.author | Daskalopoulou, Kyriaki | en |
dc.contributor.author | Calabrese, Sergio | en |
dc.contributor.author | Bellomo, Sergio | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | en |
dc.contributor.department | Dipartimento di Scienze della Terra e del Mare (DiSTeM), University of Palermo, Italy | en |
dc.contributor.department | Dipartimento di Scienze della Terra e del Mare (DiSTeM), University of Palermo, Italy | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | - |
crisitem.author.dept | Dipartimento di Scienze della Terra e del Mare (DiSTeM), University of Palermo, Italy | - |
crisitem.author.dept | Dipartimento C.F.T.A., Palermo University, Palermo/Italy | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | - |
crisitem.author.orcid | 0000-0003-1724-0388 | - |
crisitem.author.orcid | 0000-0003-0249-6663 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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