A Byzantine Shipwreck from Cape Stoba,Mljet, Croatia: an interim report

The Cape Stoba shipwreck is located on the seabed off the island of Mljet in Croatia at a depth of 21–28 m. Following initial investigation in 1975, four seasons of excavation have been carried between 2010 and 2014 by the Department for Underwater Archaeology of the Croatian Conservation Institute, joined by the Department of Studi Umanistici of the Università Ca' Foscari of Venice from 2012. The wreck‐site is evidenced by a cargo of nine amphora types dated to the 10th‐11th century AD, produced in the Eastern Mediterranean and Black Sea area, and glassware of Levantine production. The only direct evidence of the ship itself to date, is one iron anchor.     

Pb and Sr Isotopes and the Provenance of the Painting Materials of Cornelius Krieghoff in 19th‐Century Canada

Radiogenic lead and strontium isotope data are presented for lead‐ and calcium carbonate/barium sulphate‐containing paint and ground samples from 15 paintings, executed between 1844 and 1871, by 19th‐century Canadian artist Cornelius Krieghoff. Like many artists of this era, Krieghoff used lead‐based pigments such as lead white, chrome yellow and Naples yellow, and extenders such as calcium carbonate and barium sulphate. The lead isotope analyses of the majority of these pigments are consistent with the isotopic compositions of lead mined from European lead deposits in England and/or Germany. However, three samples from Krieghoff's early career yield lead isotope compositions that are much more radiogenic than European sources. The lead isotope compositions of these three samples are consistent with the addition of a more radiogenic lead component that is similar to the lead derived from North American lead deposits in Missouri and Illinois (Mississippi Valley Pb–Zn type deposits). The strontium isotope compositions of the extenders suggest that the raw materials for calcium carbonate or barium sulphate extenders were largely derived from Palaeozoic to modern‐day marine environments. This study shows that pigments manufactured from North American lead were being incorporated into Canadian paintings as early as 1844.     

基于铅同位素比值的古代矿料混合模型分析法

为深入研究古代青铜器示踪矿料来源中矿料混合问题,通过铅同位素研究数据构建矿料混合模型,从理论上探讨满足条件的青铜器数据样本其矿料混合的情况。基于模型,通过对铅同位素数据的处理,不仅能够匹配相应的矿料混合模式,而且可为器物分类提供依据。此外,还可计算出相应的铜料中表观含铅量,为相关研究提供参考依据。     

北京昌平沙河镇出土蜻蜓眼玻璃珠的科学分析与研究

为探讨北京昌平沙河镇墓葬出土的三枚蜻蜓眼玻璃珠的质地和来源,利用X射线衍射分析（XRD）、激光拉曼光谱分析（LRS）、便携式能量色散X射线荧光分析（PXRF）三种无损分析方法,对玻璃珠基体和眼珠分别进行了结构和化学组成的无损伤测试。结果表明,这三枚蜻蜓眼珠的基质为玻璃态物质,其化学成分表明该玻璃属于钠钙硅酸盐（Na₂OCaOSiO₂）系统;Cu和Co是主要的着色元素。考虑到三枚珠子采用的钴料成分为高铁低锰的进口钴料,同时通过与国内外相似珠子的对比,推测这三枚蜻蜓眼玻璃珠是外国进口物的可能性较高。蜻蜓眼玻璃珠所在墓葬群虽为清代,但根据初步的分析研究可推断,墓主通过收藏或其他途径获得并将其作为随葬品。     

Study of medieval glass fragments from Savona (Italy) and their relation with the glass produced in Altare

Altare was in the medieval and post-medieval period an important glassmaking center in the Liguria region in Northern Italy. The first historical evidence of glassmaking in Altare is dated to the twelfth century. In spite of that, due to the continuity of glassmaking up to the present time and the contemporaneous intensive urbanization of the territory, no medieval glass from Altare or its immediate vicinity has been analyzed up to now. In this work, glass from archaeological excavations in the center of Savona, city with close ties with the glassmaking center, was studied. Glass fragments, dated from the tenth to the sixteenth century were selected from the collections of the Archaeological Museum in Savona and non-destructively analyzed with quantitative PIXE-PIGE. The resulting compositions, compared with known glass productions of the same time and evaluated on the basis of historical documents, offer an interesting panorama on the variety of glass circulation in Liguria.     

Historical signature of Roman mining activities in the Bidasoa estuary (Basque Country,northern Spain): an integrated micropalaeontological,geochemical and archaeological approach

This work presents an integrated micropalaeontological (foraminiferal content), geochemical (Pb, Zn, Cu, Ni, Cr, and Al, Pb isotope ratios, radiocarbon dating) and archaeological approach to the environmental impact caused by Roman mining in the Bidasoa estuary (northern Spain). Sediments collected in the ancient Roman port of Irun represent a typical infilling sequence, reflecting a progressive isolation from the estuarine environment. They exhibit elevated contents of Pb, clearly higher than those recommended nowadays for acceptable sediment quality. Isotope composition confirms exploitation of local galenas as the main source for this metal. Results from a borehole (25 m long) reveal that Pb pollution extended also to the adjacent estuarine area. The beginning of Roman mining activities is recorded by a marked increase in Pb concentrations. However, the maximum value appears later in time (after 660 cal AD). Although this enrichment could be related to the reworking upstreams of previously polluted materials, recently obtained archaeological data suggest that episodes of historically non-documented mining activities could have taken place in the surrounding area after Roman times.     

The impact of mining activities on the environment reflected by pollen,charcoal and geochemical analyses

This article presents results of a multi-proxy study of a fen deposit in the former mining district of Falkenstein near Schwaz in the Tyrol, Austria. The aim of the study in the framework of the special research program HiMAT (The History of Mining Activities in the Tyrol and Adjacent Areas – Impact on Environment & Human Societies) was to disclose the ecological impact of mining in pollen and heavy metal diagrams and to create a model combining the changes in palaeoecological proxies with historical evidences for mining. The application of this palaeoecological–historical model to prehistoric times allowed us to reconstruct the impact of mining and metallurgic activities in the surroundings of the fen during the last millennia. The results of stratigraphy, radiocarbon dating, LOI, pollen and micro-charcoal analyses as well as geochemical analyses of scandium, lead and lead isotopes validated by historical and archaeological data are hereby presented.     

Moving sources: A preliminary study of volcanic glass artifact distributions in northeast China using PXRF

Recent studies have highlighted the long-distance transport of obsidian from the Paektusan (Tianchi or Baitoushan in Chinese) volcano on the border between China and North Korea to eastern Russia and Korea, but little is known about the role of the local population in the production and movement or exchange of this important raw material. This paper addresses this data lacuna by presenting sourcing results of 440 artifacts from 18 Late Paleolithic sites located in northeast China. A portable XRF enabled rapid non-destructive characterization of samples. The results show that although Paektusan obsidian was widely transported throughout northeast Asia, material from at least three other sources was also used. In particular, we highlight the significance of basaltic glass artifacts with the same geochemistry as sources found in the Primorye region of Far East Russia in sites from northeast China. This result indicates a two-way movement of volcanic glass artifacts between Primorye and the northeast of China rather than a unidirectional long-distance exchange system originating from Paektusan Volcano.     

Lead pigments and related tools at Akrotiri,Thera, Greece. Provenance and application techniques

This paper refers to an investigation of finds that are associated with the raw materials and tools for the preparation or use of lead pigments at Akrotiri on Thera, Greece, during the Early, Middle and Late Cycladic Bronze Age (c. 3000–1600 BC). For the detection and the preliminary characterisation of remains of pigments that were found on stone tools, the in situ application of X-Ray Fluorescence spectroscopy proved to be invaluable. In order to identify the chemical composition of the pigments and to investigate their provenance from a geological perspective, quantitative X-Ray Diffraction analysis was conducted. A thorough visual macro and microscopic examination of the morphology of the materials permitted the determination of physical features (colour, homogeneity, grain size) as indicators of their nature or degree of processing. Based on the results of these analyses, the traces of lead oxides that were detected on the stone tools are associated with specific collections of litharge items discovered at the settlement of Akrotiri, and probably provide evidence of their earliest use in preparing pigments.