1,720,999 research outputs found
THE ORCHESTRA OF THE THEATRE OF CAESARAUGUSTA, IDENTIFICATION OF ITS MARBLES
No full textPOSTER PRESENTATO A "ARCHAEOMETRY 2004" ZARAGOZA, MAY 3-7, 200
87SR/86SR, 18O/16O AND 13C/12C ISOTOPIC RATIOS IN PROVENANCE DETERMINATION OF CLASSICAL MARBLES: THE CASE OF QUARRIES DISCRIMINATION OF THASOS ISLAND.
No full textPOSTER PRESENTATO AL CONVEGNO "ARCHAEOMETRY 2004", ZARAGOZA, MAY 3-7,200
The role of water-rock ratio and temperature in the isotopic alteration of flysch rock in the Tolfa Mountain mining district (Latium, Central Italy)
No full textCarbon and oxygen isotope analyses have been performed on calcium carbonate samples from flysch rocks collected in the south of Tolfa and Allumiere villages (Central Italy). Large variation it) delta(18)O occurs from values around +28 per mil (SMOW), typical of marine carbonates, down to values of about +9 per mil (SMOW). The lower values are measured on samples collected close to phanerocrystalline carbonate deposits outcropping in the area and interpreted as part of a hydrothermal vein system. delta(13)C does not show large variation, and, aside from a few outliers, falls within a range of 0 and +2 per mil (PDB). Similar carbon and oxygen isotope spatial relationships between the flysch country rocks and the phanerocrystalline carbonate deposits were determined in a previous study by FERRINI & MASI (1987), who interpreted the O-18 depletion as due to interaction of the host rock with an aqueous fluid at hydrothermal temperatures below 250degreesC and with a water to rock ratio progressively increasing toward the carbonate vein. The combined results indicate that hydrothermal fluid temperature largely regulates oxygen isotope variation (and possibly the carbon and oxygen deltas co-variation) with respect to the variation of the water to rock ratio
THE HISTORY OF THE MEDIEVAL OPEN SETTLEMENT OF STARE MIASTO (CIVITAS ANTIQUA) AT KALISZ (GREATER POLAND) TRACKED BY ISOTOPE DATING METHODOLOGY
No full textThe main results achieved by the present research are summarized as follows: 1) Two distinct Early Middle Ages occupation phases in the most elevated area of the Kalisz-Stare Miasto settlement have been distinguished and their timing assessed by isotope dating. 2) A significant hiatus between the two occupation phases could indicate abandonment or a change of function of the higher parts of stare Miasto. 3) The transition from the first, unmanaged Stare Miasto village to a proto-urban settlement took place over some 400 years. During this time interval, however, the occupation appears to have been confined to the lower parts of the eminence (e.g. trench II, not discussed here). 4) The 14C readings have confirmed that layers exposed in trenches X and XII were unaffected by reworking and therefore the excavated bones and wood fragments refer to the Christian cemetery of the most recent (cal. A.D. 1165-1280) Early Middle Ages occupation phase
Evidence for crustal assimilation, mixing of magmas, and a 87-Sr rich upper mantle. Contr.Min. Petr. 92, 269-280, 1986.
No full textSedimentological, Petrographic and Geochemical remarks on some Miocene Rhodolite deposits from Veneto and Northern Apennine (North Italy). Miner.Petr.Act, XXXVII,261-276,1994.
No full textITALICA (SEVILLE). USE OF LOCAL MARBLE IN AUGUSTAN AGE
No full textATTI DEL CONGRESSO ASMOSIA VIII- GIUGNO 200
Provenance determination of classical marbles by the combined use of oxygen, carbon and strontium isotopes: a preliminary study.
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Parte II Capitolo III: La determinazione della provenienza dei marmi usati in architettura a Ostia.
No full textNel Cap. III si è effettuata la detereminazione della provenienza dei marmi appartenenti ad elementi architettonici, prendendo in esame gli edifici di Ostia Antica. L'indagine archeometrica è stata condotta utilizzando l'analisi petrografica unitamente allo studio della composizione isotopica di ossigeno e carbonio tramite spettrometria di massa. Irisultati sono riportati nelle tabell
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