Innovative nanomaterials for bone remains consolidation: performance evaluation and impact on 14C dating and on palaeogenetic analysis

An innovative protocol for the consolidation of ancient bone remains based on the use of nanometric hydroxyapatite (HAP) was set up and tested through a multidisciplinary approach. A new protocol for the synthesis of HAP nanoparticles was developed, and the composition of the obtained nanomaterial were investigated through Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray Diffraction (XRD); sizes, shape and morphology of the synthesized particles were studied by Scanning Electron Microscopy (SEM). The consolidation performance was evaluated by testing the new nanomaterial on degraded ancient bone findings. An increase of the mineral density and of the micro-hardness of the bone were observed. The new consolidation method was also tested to assess possible effects on the palaeogenetic analysis and radiocarbon dating on the treated bones. The consolidation treatment has no substantial impact on the genetic characterisation of the skeletal remains and does not introduce any contaminations that could affect radiocarbon dating. This consolidation procedure represents a more compatible conservation tool with respect to traditional procedures: it has been shown that the treatment is effective, easily-applicable and not detrimental for 14C dating and palaeogenetic analysis.

DATING OF BURIAL GROUNDS OF THE XIONGNU ERA ALA-TEY 1 AND TEREZIN IN TUVA

Статья посвящена вопросам датировки могильников эпохи хунну Ала - Тей 1 и Терезин в Туве. В ходе раскопок получен значительный материал, включая непотревоженные захоронения с разнообразным погребальным обрядом и богатым инвентарём. Помимо широко распространённых в это время баночных керамических сосудов, железных ножей, шильев и других бытовых предметов, здесь найдены многочисленные, в том числе уникальные образцы декоративно - прикладного искусства древних кочевников - большие ажурные пряжки с зооморфным или геометрическим орнаментом, инкрустированные и гравированные пряжки - пластины из сибирского гагата, китайские бронзовые зеркала и монеты у - шу, хуннские вазовидные сосуды и пр. Для некоторых погребений получены радиоуглеродные даты. Исходя из анализа погребального инвентаря и результатов радиоуглеродного датирования, время существования этих могильников можно отнести ко 2 - 1 вв. до н. э. The article is devoted to the dating of burial grounds of the Xiongnu Epoch Ala - Tey 1 and Terezin in Tuva. During the excavations, signifi cant material was obtained, including undisturbed burials with a variety of funeral rites and rich inventory. In addition to the widely used ceramic vessels, iron knives, awls and other household items, archaeologists found here numerous and unique samples of ancient nomads’ decorative and applied art - big openwork buckles with zoomorphic or geometric ornaments, inlaid and engraved buckles - plates made of Siberian jet coal, Chinese bronze mirrors and Wu - shu coins, Xiongnu vase - shaped vessels, etc. Radiocarbon dates were defi ned for some burials. Based on the analysis of the burial inventory and the results of radiocarbon dating, the time of existence of these burial grounds can be related to the 2nd - 1st centuries BC.

Scientific Analysis and Conservation Treatment on the Buddhist Scriptures of Paper Relics Excavated from Sum Tolgoi, Mongolia

This study analyzed the composition and structure of materials with Buddhist paper scriptures excavated from architectural sites in ‘Sum Tolgoi’ of the 17th century and carried out conservation treatment base on the result of the analysis. The scriptures were covered in dust and foreign sub stances, and were so crumpled that it was impossib le to identify the form. The damage, loss, and discoloration have been identified. Buddhist scriptures written in Tibetan used indigo and ink sticks on paper as a result of UV-Vis analysis, and ink sticks as black character materials from scriptures written ancient Mongolian. SEM-EDS and Micro-XRF analyses revealed that the outlines were drawn with red lines using a mix of Minium (Pb3O4) and Cinnabar (HgS), or Cinnabar (HgS) alone, and the contents of the scriptures were written with silver paint. Silver chloride (AgCl) and Calcium (Ca) were identified in the silver paint component of the characters, while Calcium and Orpiment (As2S3) were identified in the yellow lines. Concerning the paper ground, Buddhist scriptures written in ancient Mongolian were characterized by herbal plant fiber and bast fiber, and those written in Tibetan, by bast fiber. Radiocarbon dating indicates that the paper for the scriptures was produced b etween the 15th and 17th centuries. Conservation treatment of the scriptures was carried out based on the experiment on the production of pre-coated paper and how to coat that to prevent the second damage due to the deformation and fragility of the excavated paper. The scriptures were preserved and mounted, and a neutral box was made to identify the contents of the scriptures recorded on both sides after the treatment. This conservation treatment is the result of a study that applied new conservation treatment materials and methods according to the principle of conservation treatment reversibility.

Eneolitický kostrový pohřební ritus na Moravě ve světle radiokarbonového datování / The Eneolithic inhumation burial rite in Moravia in light of radiocarbon dating

The article addresses the chronology of Eneolithic inhumation burials in Moravia based on radiocarbon dating. A total of 17 individuals were dated using 20 radiocarbon dates, primarily individuals without grave goods or individuals from problematic contexts. The study mainly covers the period of the Early Eneolithic, to a lesser extent the Middle and Late Eneolithic. The find contexts and anthropological assessments are newly published for most of the burials in question. Based on the chronological analysis of graves dated by radiocarbon dating, it is possible to approximately define the time dispersion of individual burial methods in Moravia. Flat graves with individuals in a stretched position without grave goods can be most reliably dated to about 3800–3600 BC.

Wczesnośredniowieczne grodzisko w Dusinie, pow. gostyński, woj. wielkopolskie w świetle ponownej analizy archeologicznej

The article presents the results of another archaeological analysis carried out on materials from an early medieval settlement in Dusina in southern Greater Poland. The data obtained during the excavations, during the millennium research, prompted the recognition of the settlement as the oldest motte-type object in Poland. During the verification of the old findings, the ceramic material and the stratigraphic situation were re-analyzed, radiocarbon dating was made, and historical and cartographic data were used to confirm the chronology of the stronghold as well as the course of events that led to severe damage and disturbance of the original appearance of the stronghold. A contour plan and a model of the terrain were also prepared.

THE DISTRIBUTION OF AGE DISPARITIES IN CONIFER CHARCOAL FROM ARCHAEOLOGICAL STRUCTURES AND APPLICATIONS FOR TREE-RING-RADIOCARBON DATING

ABSTRACT Age disparities between charcoal samples and their context are a well-known problem in archaeological chronometry, and even small offsets could affect the accuracy of high-precision wiggle-matched dates. In many cases of taphonomic or anthropogenic loss of the outermost rings, sapwood-based methods for estimating cutting dates are not always applicable, especially with charcoal. In these instances, wiggle-matched terminus post quem (TPQ) dates are often reconciled with subjective or ad hoc approaches. This study examines the distribution of age disparities caused by ring loss and other factors in a large dendroarchaeological dataset. Probability density functions describing the random distribution of age disparities are then fit to the empirical distributions. These functions are tested on an actual wiggle-matched non-cutting date from the literature to evaluate accuracy in a single case. Simulations are then presented to demonstrate how an age offset function can be applied in OxCal outlier models to yield accurate dating in archaeological sequences with short intervals between dated episodes, even if all samples are non-cutting dates.

Wood analyses helped to determine the location and approximate construction period of the Roman bridge over the Drava River in ancient Poetovio (Ptuj, Slovenia)

We present the results of a dendrochronological study and radiocarbon dating of the wooden piles of the bridge over the Drava River in Ptuj. The piles, together with stone elements (a fragment of an imperial building inscription and parts of the architectural decoration) were retrieved from the riverbed in 1913 and are now in the Regional Museum Ptuj - Ormož. Using dendrochronology, radiocarbon dating of carefully selected annual rings in the wood and calibration with the wiggle-matching method, the date of the last (outermost) annual ring on the pile was determined to be 161 ± 27 cal AD (1σ) or 160 ± 32 cal AD (2σ). Since the pile contained no sapwood, the dating approximately agrees with the date of the building inscription on the stone slab, which attributes the commission for the reconstruction or construction of the bridge to Emperor Hadrian in the last years of his reign (117-138 AD). The dating of the wood has thus confirmed that the remains examined do indeed belong to a Roman bridge, probably built or renovated during the reconstruction of the road network in the area of the colony of Poetovio under Hadrian or one of his successors.