Archaeometry最新文献

Although the discovery of metal objects is not common in Chalcolithic or Bronze Age sites, the study of bone surface microscopic grooves from animal butchering can yield evidence of the use of metal artefacts in these contexts. Additionally, the presence of slice marks made with metal objects in Chalcolithic and Bronze Age sites has highlighted the use of metal in common practices beyond their ornamental application, as usually expected at the early stages of metallurgy. Here, we present the study of the slice marks found at the Chalcolithic site of Zanjillas, using geometric morphometrics and machine learning algorithms, with the aim of identifying the nature of the tools used for carcass processing at the site. For this purpose, we replicate previous analyses considering slice marks produced with lint flakes and metal tools to generate a referential framework that serves as comparative to the Zanjillas sample. Our results suggest that most of the domestic activities related to carcass skinning, defleshing, or evisceration in Zanjillas were still performed with flint artefacts.

This paper presents the results of the mineralogical, petrographic and chemical study of different archaeological samples related to terracruda sculptures and other elements that were part of the architectural decoration of the Buddhist sites of Tepe Narenj and Qol-e-tut (Kabul, Afghanistan; fifth to 11th centuries CE). The main objective of the study was to characterize the samples using an archaeometric approach. The study helped to better understand the materials involved in the modeling of Afghan sculptures and their processing, such as the different nature of the clay layers and the finishing ‘stucco’ coating. The results further indicate that similarities exist among the manufacturing process of the studied samples and that used today by an ancient caste of clay artists in West Bengal (India), suggesting the existence of a continuous technological tradition that deserves to be further explored in the future.

This study examines the fluting of two well-known Late Pleistocene fluted point types in North America: Clovis and Folsom. Using scaling analyses, we assess the changing relationship between flute length and point length in a large sample of each type. Researchers use scaling to investigate the physical constraints of an object and determine how its dimensions change with size. We compare the strength and consistency of the scaling relationships between the older Clovis and the younger Folsom with the aim of shedding light on scaling differences, if any, over their temporal span. Our results show that there is a significant difference in the relationship of fluting length to point length between these types. In Folsom point manufacture, flute length increases nearly twice as fast with increasing point length than in Clovis. Importantly, the scaling of flute length to point length relationship is isometric (linear) in the Folsom sample, whereas it is allometric (sublinear) in the Clovis sample. In other words, Folsom flintknappers maintained a constant ratio of flute length to point length. Clovis flintknappers were less concerned about maintaining this ratio. We attribute this difference to a potentially increasing, or changing, functional role of fluting in Folsom.

The Salado and Verde streams constitute the two main seasonally available freshwater courses that flow into the Atlantic coast of the Río Negro province (continental Patagonia, Argentina, 42° South). This would have favored their use in the past as corridors for human circulation between the coast and the interior. This paper presents the results of the technomorphological and geochemical analyses of the obsidian artifacts recovered in the area to constrain mobility. The results allow us to propose the existence of toolkit reconditioning or replacement activities, and the identification of different sources of provenance of the obsidians (Sacanana, Telsen, and Portada Covunco, distant up to 800 km from the study area), reinforcing the hypothesis of a coast–inland circulation, with the possible existence of circuits of exchange of this raw material.

Lithic artifacts are some of the most common and numerous remains recovered from paleolithic archaeological sites. However, these materials can undergo multiple post-depositional alterations after their introduction into the archaeological record. Due to the high quantity of lithic remains recovered, a quick, flexible, and effective method for identifying degrees of alteration on the surface of lithic implements is highly desirable. The present study examines the use of gray level images to obtain quantitative data from the surface of flint artifacts and determine whether these images can detect the presence of post-depositional alterations. An experimental collection of flints was subjected to sequential episodes of rounding in a tumbling machine. After each episode, photographs were taken with a microscope, resulting in quantitative surface values using gray level values. The quantitative surface values were used as variables in machine learning models to determine time of exposure and the most salient variables for discrimination. Our results indicate that the extraction of metrics from gray level images successfully capture changes in the surface of flint artifacts caused by post-depositional processes. Additional results provide insight into which areas to sample when seeking post-depositional alterations and underscore the importance of particle size in the generation of alterations.

Previous studies have established the use of various blue pigments, including both local and imported varieties, in the decoration of architecture in ancient China. However, the application of these pigments in local religious architecture has been understudied. In this study, the chemical analysis of ultramarine blue pigments was conducted on a mural painting retrieved from Yongle Taoist Temple in ancient China. The results showed that both imported and local pigments were used individually in the initial drawing period of the Yuan Dynasty (AD 1271–1368), whereas they were mixed in a later restoration in the Qing Dynasty (AD 1636–1912). Of particular significance, the analysis revealed the presence of lapis lazuli in a local religious relic of the Yuan Dynasty for the first time. Further analysis of the elemental proportions and associated minerals led to speculation about the origin of the lapis lazuli, which is believed to have come from Badakhshan, the northeastern region of Afghanistan, and been transported to Central China through the Silk Road. This finding shed light on the trade routes and usage of these pigments in the construction of religious architecture from the Yuan to the Qing dynasties.

Research into the family of the Counts Swéerts-Sporck raised doubts regarding their biographical data, particularly concerning a child who died in 1817, later identified as Philipp Swéerts-Sporck, and his siblings Joseph and Barbara. These were alleged to include a pair of dizygotic twins, but DNA could not be used to clarify their relationships. Carbon and nitrogen isotopes were therefore measured in their first permanent molars, whereas Philipp's biological age was estimated based on his skeleton. Philipp died at an older age than the written sources claim; an isotopic similarity was found between Joseph and Barbara, but Philipp differed.

A novel preparation method of calcite layer was explored for the conservation purpose of the surface sulfation limestone artifacts. In this method, the alcoholic solution of calcium glycolate was used as a precursor of calcite layer. After application on the surface of gypsum crust on limestone by spraying, calcium glycolate can combine with the carbon dioxide spontaneously and form a compact calcite layer. The obtained calcite layer can act as a shelter and can prevent the gypsum crust from the dissolution damage of the natural precipitation. The protective properties of the calcite layer were investigated by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS), X-ray diffraction (XRD), infrared spectroscopy (FTIR), water erosion resistance, water absorption, colour difference, surface strength, and hardness test. The results revealed that the water erosion resistance, surface strength, and hardness of the treated sample were increased remarkably. Meanwhile, the intrinsic physical properties such as porosity, capillary absorption, and appearance were not affected obviously, indicating a good compatibility of the proposed protection method.

Portable X-ray fluorescence (pXRF) geochemical analysis on obsidian from five Formative period (1200 BCE to AC 100) sites from Tlaxcala, Mexico, has revealed that most of the material had similar values to those found in the closest obsidian source, named El Paredón, Puebla. Nevertheless, initial analyses did not resolve whether these materials came from the same caldera or from a specific obsidian deposit. Here we present a methodology that allows the identification of obsidian subsources. The results reveal that Tlaxcalan populations took advantage of a specific obsidian deposit called Tres Cabezas, Puebla, providing valuable new data to identify associated regional exchange networks.

Double-armed insigniae of the Carpathian type are mysterious ceremonial symbols of the Urnfields representing the connection between ideological principles in the Western Carpathians. The Horné Srnie metal hoard shows that early Lusatian mountain communities developed an emulation strategy c.1325 BCE that shifts the origins of Lusatian metallurgy roughly by one century, using the elite style of the technologically advanced Piliny culture to represent their social status. The reproduction was motivated by the effort of Lusatian warrior-priests to maintain their authority during the period of Urnfield societal reorganization and grew into the ‘homemade’ production of low-quality cast specimens from recycled materials or metallurgical residues.