La stabilité des céramiques par rapport à l'environnement

Vitali, Vanda; Franklin, Ursula; Hancock, R. G. V.

doi:10.3406/arsci.1984.1210

Cited by 6 publications

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“…Freestone et al (1985), Walter and Besnus (1989) and Freestone (2001) argued that phosphates can precipitate in potsherds from aqueous solutions, forming sub-microscopic crystals and thin films, or adsorb at the surface of primary mineral phases, leading to high bulk phosphorus, a parameter that is commonly assumed to be a marker for contamination. The experimental work of Vitali et al (1984), Franklin and Vitali (1985) and Collomb and Maggetti (1996) supports this mechanism for phosphorus enrichment in potsherds. In soils, phosphate precipitation is related to environmental conditions, particularly to pH and Eh (Nriagu and Dell 1974;Lindsay and Vlek 1977), which are controlled by a complex interaction of changes in the water table, movement of water in the ground (Medrano and Piper 1997;Ann et al 2000;Pierri et al 2000;Scaccia et al 2002), the presence of organic matter and bacterial activity (Fredrickson et al 1998;Brown et al .…”

Section: Discussionsupporting

confidence: 53%

Phosphates in Archaeological Finds: Implications for Environmental Conditions of Burial*

Maritan

Mazzoli

2004

Archaeometry

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The occurrence of coarse‐grained vivianite and mitridatite aggregates in a potsherd, a grand ring and a timber imprint from the Second Iron Age site of Adria (Rovigo, northeastern Italy) suggest contrasting environmental conditions of burial. In particular, bone fragments were replaced by vivianite at relatively low pH and Eh, due to the presence of deteriorating organic matter, together with slag and iron flakes. Subsequent interactions with Ca‐rich groundwater characterized by higher pH and Eh determined the growth of mitridatite after vivianite. Although phosphates crystallized after burial, the examined samples were not involved in pervasive chemical contamination.

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Section: Discussionsupporting

confidence: 53%

Phosphates in Archaeological Finds: Implications for Environmental Conditions of Burial*

Maritan

Mazzoli

2004

Archaeometry

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“…This research found that for all but the coarsest of wares, all elements that were measured relatively precisely could be analysed quite reliably using either 100 mg or 300 mg samples. A study of surface corrosion of newly made ceramics was one of the first such laboratory studies (Vitali et al 1984; Franklin and Vitali 1985).…”

Section: Numbers Of Archaeological and Historical Samples Analysedmentioning

confidence: 99%

Archaeometry at Slowpoke‐toronto

2007

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This paper describes the archaeometric research conducted at the SLOWPOKE ReactorFacility of the University of Toronto (SLOWPOKE-Toronto) during its existence from 1971 to 1998. The contributions to student teaching and research are described, and the total contribution of the facility to studies of an eclectic assortment of ancient and historic materials is addressed. experimentation, many researchers from a wide variety of disciplines had access to what turned out to be a useful analytical technique.Archaeometric research began in the first year of facility operation, and had a 27-year history, continuing through to the closing of SLOWPOKE-Toronto in late 1998. ARCHAEOMETRIC USAGE PATTERNSThe information presented in this section has been culled from contributions from individual academics to SLOWPOKE-Toronto Annual Reports and the SLOWPOKE Publications collection. It therefore probably represents a reasonable description of what really occurred, somewhat akin to the way in which INAA data describe archaeological materials.Ceramic analyses began in the first year of reactor operation, using a donated 100-channel multichannel analyser ( Thirteen elements were positively identified and there were strong indications of seven more ; Hancock and Franklin 1972). Archaeometrically inclined students, however, did not initiate research projects until the 1974-5 academic year (Czuba 1975;Katz 1975;Stahl 1975), and the first conference presentations were not until 1976 (Hancock 1976a;Hancock and Franklin 1976).A summary of the long-term, archaeometric usefulness of SLOWPOKE-Toronto is presented in Table 1. In this, five-year blocks of numbers are presented for student reports and theses, for conference presentations, and for final publications in journals or conference proceedings. Of the archaeometric student research projects, most were undertaken by undergraduate students (43), with six master's projects (. The last undergraduate report, on the analysis of red glass beads, was by Kwok (1998).In the numbers of student research projects, there was growth over the first decade, followed by consistent output. This continuing archaeometric contribution to the overall research and teaching undertaken at SLOWPOKE-Toronto was noted by a Dean of Engineering, who bemoaned the fact that his faculty was supporting a facility that was being used significantly by non-engineering students. This profession-centric view made no allowances for the many non-engineering students who would later go on to academic and other meaningful employment.The unique hands-on learning opportunities provided by SLOWPOKE-Toronto must certainly have helped the careers of many students. It was also almost the only opportunity that archaeologists got to wear white lab coats.

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Ceramic abandonment. How to recognise post-depositional transformations

Maritan

2020

Archaeol Anthropol Sci

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La stabilité des céramiques par rapport à l'environnement

Cited by 6 publications

References 2 publications

Phosphates in Archaeological Finds: Implications for Environmental Conditions of Burial*

Phosphates in Archaeological Finds: Implications for Environmental Conditions of Burial*

Archaeometry at Slowpoke‐toronto

Ceramic abandonment. How to recognise post-depositional transformations

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