河南巩义窑、河北邢窑出土瓷器的原料来源研究——以北朝和隋唐时期出产的青瓷、白瓷为例

为探讨河南巩义窑、河北邢窑出土的不同时期青瓷、白瓷的原料来源,用显微观察、电子探针(EPMA)等手段,分析其原料来源及技术工艺进行分析,并探讨两窑之间的技术联系。分析可知,两窑在瓷釉、瓷胎的原料配置上存在差异:巩义窑瓷胎均使用当地高岭土一元配方,瓷釉中加入瓷胎原料为基体并加入高钙草木灰;邢窑瓷胎在使用当地高岭土的基础上加入长石类矿物原料,瓷釉中除瓷胎所使用的黏土以外,还加入含有高钙高镁的草木灰或矿物原料。两窑还存在一些共性如:两窑瓷釉均添加石英类原料以提高SiO_2含量;巩义窑与邢窑两地早期、唐中期产品形制相似,原料配方有共通之处,说明当时两地在陶瓷的原料配方、制瓷技术中有过交流。     

Supply routes and the consumption of glass in first millennium CE Butrint (Albania)

Archaeological, historical and analytical evidence can identify trade patterns and the movement of people and products and thus reveal the cultural and economic connections that existed at a given time. In the case of first millennium CE glass, the manufacture of raw glass in a limited number of glass making installations with unique compositional characteristics makes it possible to trace the likely origin of the raw materials at consumption sites. In this way the analytical characterisation of a large corpus of glass finds can identify changes in the supply routes of high-end industrial products from the Roman to the middle Byzantine period.     

LA–ICP–MS,SEM–EDS AND EPMA ANALYSIS OF EASTERN NORTH AMERICAN COPPER‐BASED ARTEFACTS: IMPACT OF CORROSION AND HETEROGENEITY ON THE RELIABILITY OF THE LA–ICP–MS COMPOSITIONAL RESULTS*

This study discusses the relevance of compositions obtained using laser ablation – inductively coupled plasma – mass spectrometry (LA–ICP–MS) for the purpose of identifying the provenance of copper‐based artefacts found in Virginia at Native American sites dated from the 16th to the 18th centuries. Ten artefacts were investigated by scanning electron microscopy – energy dispersive spectrometry (SEM–EDS) to visualize the corrosion and characterize the heterogeneities in the metal and electron probe micro‐analysis (EPMA) to determine separately the compositions of the intact metal and of the corrosion product. It is shown that the corroded surfaces are highly depleted in zinc but that representative concentrations can be determined by sampling the deeper, uncorroded metal. In contrast, lead values are highly variable because of the heterogeneous distribution of this metal within the bulk copper. Despite these problems, brass is easily identifiable and American native copper and European smelted copper can be unambiguously distinguished with LA–ICP–MS on unprepared artefacts using As, Ag, Ni and Sb trace elements.     

Tracing the origins of Eastern European enamelling: Chemical composition of glass and enamels from the Bryansk hoard (south‐western Russia)

The chemical composition of a series of Eastern European enamels from the Bryansk hoard from the third century ad and other sites was studied using scanning electron microscopy with energy‐dispersive spectroscopy (SEM‐EDS) and electron microprobe analysis (EPMA) techniques. Red opaque glass is homogeneous compositionally, suggesting not only common manufacturing traditions but also identical types and sources of raw materials and, consequently, a single origin. The glass is made in the Roman tradition of enamelling, which appeared in the mid‐first century ad , as was the case with orange glass. The difference in the lead content in glass of different colours, which determines the melting temperature, allows the reconstruction of polychrome enamelling techniques.     

LATE ROMAN GLASS FROM THE ‘GREAT TEMPLE’ AT PETRA AND KHIRBET ET‐TANNUR,JORDAN—TECHNOLOGY AND PROVENANCE

Forty‐seven window and vessel glasses from the ‘Great Temple’ at Petra (Jordan), dating to the first/second and fourth centuries ce , were analysed by EPMA for major and minor elements. A subset of 29 samples from Petra and 15 samples from Khirbet et‐Tannur were additionally analysed for trace elements, using LA–ICP–MS. Six compositional groups were identified on the basis of the presence of decolouring agents. The majority of the glasses derive ultimately from the Levantine coast, but most of the groups show evidence for highly selective recycling. The observed differences between the two sites could be related to different chronological ranges, functions, relative wealth and trade connections.     

ARCHAEOMETRICAL STUDIES OF ROMAN IMPERIAL AGE GLASS FROM CANTON TICINO*

An archaeometrical study of Roman glass finds recovered in the Canton Ticino area was performed after the finding of traces of possible glass‐working at Muralto near Locarno. The aim of this work is to provide chemical characterization of these glass varieties—never analysed before—and to compare the results obtained with those for glass of the same period coming from other sites (Aquileia, Augusta Praetoria and Modena). The chemical data shows that the composition of Canton Ticino glass remained the same from the first to the fourth century ad . Moreover, the large amounts of Sb used as a decolouring agent in these samples represents a peculiar trait.