山东青州龙兴寺部分北齐佛造像石材及朱砂颜料分析研究

山东青州龙兴寺窖藏佛教造像出土于1996年,造像雕刻技艺精湛,数量多,贴金彩绘丰富,展现出一种特殊的佛教造像艺术特征。一些佛像由于长期掩埋和历史上遭到破坏,彩绘发生了褪色、变薄、起翘等现象。为了弄清佛造像彩绘颜料和结构,本研究采用三维视频显微镜、显微拉曼光谱分析、扫描电镜-能谱、偏光显微镜等仪器分析颜料的结构和化学组成。分析结果表明,龙兴寺佛造像红色颜料为辰砂(Hg S)与铅白(2PbCO_3Pb(OH)_2)混用;地子主要为铅白,经过对该批出土佛造像残碎的石块做薄片处理做偏光显微分析,得到造像石材的主要矿相为含菱铁矿、生物碎屑、白云石的泥晶灰岩(灰岩即石灰石)。     

铅同位素考古研究的可行性问题——浅议“青铜器铅同位素指示意义的范铸实验研究”

国际上对铅同位素示踪方法在青铜器原料产地研究中的应用做过很多探讨。《范铸》一文再次提出有关问题,认为铅同位素分析结果不能确切指示青铜器铜锡铅原料的来源信息。本文考察了其依据的实验数据,它们似乎与其观点互相矛盾,其结论说服力相当有限。     

青铜器溶铅实验及有关问题初探

为科学探讨夏商周三代因使用青铜器可能引起的铅中毒和因此带来的一系列社会问题,对仿古含铅青铜器做了一系列溶铅实验,用原子吸收分光光度计和原子荧光光度计对实验样品进行了铅含量测试,结果表明使用含铅青铜器煮、盛食物会导致严重的铅污染。我们的祖先创造了灿烂的青铜文明,而以使用这些青铜礼器为荣耀的上层统治者们却为此可能付出了惨痛的代价铅中毒,并由此带来一系列社会问题。     

The smelting quarter of Valencina de la Concepción (Seville,Spain): the specialised copper industry in a political centre of the Guadalquivir Valley during the Third millennium BC (2750–2500 BC)

The first specialized copper industry of the Iberian Peninsula was developed at the start of the Third millennium BC with the appearance of mining-metallurgical settlements in its main mining district (the Pyrite Belt of the south-western). Between 2750 and 2500 BC, however, and right at the centre of the Guadalquivir Valley, the great farming settlements that ranked the territory developed a new level of metallurgic intensification with the creation of the first industrial quarters. As a way of explaining this new situation, we present the results of the systematic research (microspatial analysis; radiocarbon dating; petrologic, geochemical, metallographic and isotopic study of minerals, slag and products, …) carried out in one of them, the one developed in the main and largest political centre of the Guadalquivir Valley during the first half of the Third millennium BC: Valencina de la Concepción (Seville, Spain).     

Provenance of Early Bronze Age metal artefacts in Western Switzerland using elemental and lead isotopic compositions and their possible relation with copper minerals of the nearby Valais

Ten Early Bronze Age (BzA1, 2200–2000 BC) copper artefacts from the central Valais region from Switzerland were studied for their elemental composition and lead isotope ratios. In order to answer the archaeological question of a local copper supply, a database for copper minerals across the Valais (Switzerland) has been established. This database contains 69 data on lead isotope ratios as well as additional information on the minerals and geochemical associations for copper minerals from 38 locations in the Valais. Comparisons of the artefacts were also made with data pertaining to minerals from various deposits from Europe and Anatolia taken from the literature. The provenance of the materials is very diverse. Some of the data are compatible with the data from the copper mineral deposits of the Valais region. Moreover, three copper lunulae were identified as possibly Tuscan, which suggests contacts between Italy and the Valais region. This pattern also establishes a multiplicity of provenances for the metal and cultural influences in the Alpine environment of the Rhone Valley of Switzerland at the beginning of the Early Bronze Age.     

Defining the Lead Isotopic Fingerprint of Copper Ores from North‐West Spain: The El Milagro Mine (Asturias)

This study is focused on the El Milagro mine (Asturias, Spain) and is part of a large‐scale effort on the measurement of the lead isotopic composition of Spanish copper ores from prehistoric mines in the provinces of Asturias and León, from which no data were available until recently. Lead isotopic values are compared to the published lead data from the El Aramo mine in the same region. The results show that both mines have a very similar lead isotopic composition, apart from some highly radiogenic samples in the El Milagro mine, which are clearly different from those previously reported for the Iberian Peninsula.     

Evidence for glass ‘recycling’ using Pb and Sr isotopic ratios and Sr-mixing lines: the case of early Byzantine Sagalassos

The secondary production (working) of glass from imperial to early Byzantine times has been proven at the ancient city of Sagalassos (SW Turkey) by the existence of glass chunks, fuel ash slag and kiln fragments related to glass processing. It had been previously suggested that local green glass might have been recycled from two other locally found glass types (blue glass vessels and chunks and HIMT glass chunks). This paper provides analytical evidence for the recycling of glass next to the use of imported raw glass. The heterogeneous lead isotopic composition of the green and HIMT vessel glass at Sagalassos, with as end members on the one hand the isotopic composition of local blue glass vessels and chunks and on the other hand that of the HIMT glass chunks, could indicate the production of ‘recycled’ glass, although heterogeneous raw materials could have been used. However, the use of Sr-mixing lines confirms local recycling. It is clear that the Sr in the green and HIMT vessels is a mixture of the Sr in the aforementioned end members. It cannot be proved whether the green ‘recycled’ glass was produced from a mixture of chunks alone, or from a mixture of cullet and chunks. Suggestions are made towards the possible origin of the raw materials for the blue and HIMT glass on the basis of Sr isotopic signatures and absolute Sr contents in the glass.