Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI | http://purl.tuc.gr/dl/dias/8C4DE11E-6080-4DCF-97BA-F3794F06D9AF | - |
| Identifier | https://doi.org/10.1180/minmag.2007.071.3.327 | - |
| Language | en | - |
| Extent | 19 pages | en |
| Title | Zeolitic alteration in the Tertiary Feres volcano-sedimentary basin, Thrace, NE Greece | en |
| Creator | Christidis Georgios | en |
| Creator | Χρηστιδης Γεωργιος | el |
| Creator | T. Markopoulos | en |
| Creator | T. Marantos | en |
| Content Summary | The Tertiary volcano-sedimentary sequence of the Feres basin (Thrace, NE Greece), includes lavas of andesitic–rhyolitic composition as well as volcaniclastic rocks, pyroclastic flows and pyroclastic fall deposits principally of dacitic–rhyodacitic composition. The pyroclastic flow deposits frequently show intense devitrification, vapour-phase crystallization and evidence of fumarolic activity, which involves deposition of scapolite in pore spaces. The Feres basin can be subdivided on the basis of mineral alteration assemblages: (1) the Pefka region; characterized by intense hydrothermal alteration of the volcanic rocks and mineral zoning (silicic, arg illic, sericitic and propylitic zones) with polymetallic mineralization, and (2) the remainder of the basin; where the volcaniclastic rocks are characterized by the alteration of volcanic glass to zeolites (clinoptilolite, heulandite, mordenite, analcime), clay minerals (smectite, illite, celadonite, chlorite), SiO2 polymorphs (cristobalite, opal-CT, quartz), K-feldspar and calcite. Laumontite is also present as an alteration product of plagioclase, with stilbite sporadically occurring in veinlets. Locally, rhyolites are also altered to zeolites (clinoptilolite and/or mordenite). The zeolitization process has occurred rapidly with the depositional environment, temperature, rate of cooling (of the volcanic rocks), nature and temperature of the mineral-forming fluids and composition of the parent material controlling the formation of zeolites. | en |
| Type of Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2015-10-01 | - |
| Date of Publication | 2007 | - |
| Bibliographic Citation | I. Marantos, T. Markopoulos , G. E. Christidis ,"Zeolitic alteration in the Tertiary Feres volcano-sedimentary basin, Thrace, NE Greece ",Min.Mag. ,vol.71, no.3 , pp.327-345 ,2007. doi :10.1180/minmag.2007.071.3.327 | en |
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