THE EFFECT OF PURIFICATION AND FIRING OF CLAYS ON TRACE ELEMENT PROVENANCE STUDIES

The effect of purifying, mixing and firing of clays on trace element concentration was systematically investigated using instrumental neutron activation analysis. Eight different clays from two sites in Crete were used together with sherds found around several kilns near the sites. Trace element analysis showed that the extent to which the concentration changes after purification and firing depends on the initial particle size and chemistry of the clay. The calcite concentration plays an essential role in this. An application is made using roof tiles found at the excavation of the ancient city of Pella in Macedonia.     

CHEMICAL ASSAYS OF TEMPER AND CLAY: MODELLING POTTERY PRODUCTION AND EXCHANGE IN THE UPLANDS NORTH OF THE PHOENIX BASIN,ARIZONA, USA*

A lack of mineralogical variation characterizes the prehistoric pottery in the uplands of central Arizona. Virtually all of the ceramics in that region were tempered with phyllite, which has previously precluded provenance analyses and the investigation of pottery production and distribution in the upland zone. As shown with assays with an electron microprobe, however, both the clay fraction and the temper fragments are chemically diverse and geographically distinct, allowing many of the phyllite‐tempered wares to be sourced, thereby leading to models about the organization of ceramic production and exchange in the upland zone north of the Phoenix Basin.     

MOESSBAUER SPECTROSCOPIC,CHEMICAL AND MINERALOGICAL CHARACTERIZATION OF IBERIAN POTTERY

Three types of Iberian pottery from the same excavation and archaeological level have been studied by Moessbauer spectroscopy, atomic absorption spectroscopy, X-ray diffraction, and transmitted-light polarizing microscopy. The results are compatible with a common origin, a firing temperature below 850 °C, and a different fabrication technique for each pottery type.     

中原地区史前陶窑发展演变研究

陶器是新石器时代的广域性文化遗存之一,明显改变了史前人类包括饮食结构在内的诸多生活方式,并促进了史前文化的繁荣与发展,因而制陶术也被视为史前人类的重大发明之一.以往对制陶技术的研究多集中在制坯成型工艺方面,陶窑结构虽也被纳入考察的范畴,却未能充分考虑烧制技术与陶窑结构之间的内在联系,似乎一直没有把握住陶窑形态结构演变的核心特征.中原地区(本文主要指河南及山西中南部)不仅是新石器时代文化发展的重要区域,也发现有裴李岗文化以来各个阶段的史前陶窑遗存,为探讨史前陶窑的结构演变及烧制技术提供了较系统的实物依据.本文在充分考虑烧制技术的基础上,通过陶窑形态结构分类,力求把握其结构演变的核心特征及演变规律.     

STATISTICAL ANALYSIS OF CHEMICAL COMPOSITIONAL DATA AND THE COMPARISON OF ANALYSES

Recent statistical work on approaches to analysing compositional data - where variables sum to a constant for each row of a data matrix - may encounter difficulties when applied to data of the kind typically arising in scientific archaeology. The reason is that results obtained may be unsatisfactory from a substantive viewpoint for identifiable technical reasons. This paper explores and illustrates some possible resolutions of the problem. A feature of the approach used is to analyse subsets of the variables on separate scales. A synthesis of the results obtained from separate analyses is essential and the use of multiple correspondence analysis for this purpose is illustrated.     

INSIGHTS FROM THE ANALYSIS OF ANGEL MOUNDS POTTERY TROWELS

Archaeologists have recovered pottery trowels in excavations at numerous historic and pre-Columbian archaeological sites in North America since the late nineteenth century. Despite these facts, pottery trowels have not been the subject of thorough scientific analysis or interpretation. In this study, I define and implement a new method of analysis for pottery trowels, using a sample of 188 pottery trowels from the Mississippian site of Angel Mounds (12VG1). After describing the quantitative and qualitative attributes of pottery trowels, I define categories of frequently occurring pottery trowel bell and handle types. The extensive variability of pottery trowel shapes and sizes discovered at Angel Mounds is then discussed with regard to alternative or multiple uses for the tools and the spatial and temporal distributions of pottery trowel types. As an artifact type that provides opportunities to analyze technology, craft production and specialization, and daily practices in past societies, I argue pottery trowels may hold important future insights into a number of topics of interest to archaeologists.     

入境旅游免签政策的游客吸引效应及其异质性

本文以中国首个入境旅游免签试点政策为准自然实验,以1996-2016年53个地级市为研究样本,采用双重差分法评估了入境旅游免签政策对入境旅游人数的影响,并进行一系列稳健性检验,最后从客源地异质性和政策调整效应等维度做了进一步分析。研究发现：①入境旅游免签政策的实施显著地促进了入境旅游人数增长;②入境旅游免签政策对欧洲国家的政策效果最好,对亚洲国家和大洋洲国家有显著的正向影响,而对北美洲国家无显著作用;③2010年入境旅游免签政策的调整未能显著吸引入境游客。     

CHEMICAL CHARACTERIZATION AND STATISTICAL MULTIVARIATE ANALYSIS OF ANCIENT POTTERY FROM MESSINA,CATANIA, LENTINI AND SIRACUSA (SICILY)*

This paper presents the chemical characterization of 79 fragments of Archaic and Hellenistic fine‐grained pottery from archaeological sites in Messina, Catania, Lentini and Siracusa (Sicily). The sherds were classified as ‘calcidian’, ‘banded’, ‘unvarnished’ and ‘black varnished’ pottery. The major and trace elements identified by X‐ray fluorescence (XRF) were statistically elaborated using the method proposed by J. Aitchinson in 1986 for the analysis of compositional data. From cluster analyses using element/SiO₂ log‐ratios, it was possible to group the pottery found in Catania, Lentini and Siracusa into highly linked clusters. Conversely, the Messina pottery was divided into two clearly distinct groups. With the aim of identifying any possible mineralogical differences between the two Messina groups, Fourier transform infrared (FT–IR) absorption measurements were made, showing only quantitative differences in plagioclase and muscovite. The specific groups of pottery with restricted chemical compositions are considered to be of local production, also on the basis of archaeological and petrographic evidence.     

ON THE INFLUENCE OF DRYING AND FIRING OF CLAY ON THE FORMATION OF TRACE ELEMENT CONCENTRATION PROFILES WITHIN POTTERY*

On experimentally fired briquettes made of five chemically and mineralogically different clays, trace element concentration profiles from the centre to the surface of the briquettes have been measured by Neutron Activation in order to examine if drying and firing of the clays lead to a mobilization and subsequent migration of single components within a sherd. Mineralogical changes during firing have been determined by X‐ray diffraction. Generally, no such migration could be found. For two clays, arsenic was lost from the briquette during firing, forming non‐constant concentration profiles. If NaCl is present in the clay paste, sodium migrates towards the surface. Additionally, in the special case in which the presence of NaCl coincides with that of calcite, the heavier alkali elements evaporate, forming significant concentration profiles within the sherd.     

关于汉代铸钱陶范上铭记的研究

~~关于汉代铸钱陶范上铭记的研究@姜宝莲~~     

江西省县域经济差异特征及其成因分析

县域经济作为我国国民经济的基本单元,是构造地带经济、经济区、省区、城市等区域经济的基础。我国当前社会经济运行中的主要矛盾如城乡二元结构、区域差异扩大、"三农"问题都集中反映在县域尺度上。因此,对县域经济差异进行剖析,揭示差异形成的机理,对县域经济发展有重要意义。2000年以来,江西省县域绝对差异呈持续扩大趋势,相对差异呈相对稳定趋势,总体差异呈扩大趋势;县域经济在空间上表现为经济发达型、较发达型县市主要分布在中部地区、交通干线和长江沿线地区;欠发达型和不发达型县市呈不规则的环状分布于经济发达、较发达型县市的外围地区;从整体上来看,江西省各县市的发展水平呈现北高南低的分布格局;从县市数量上看,呈现出城市规模"金字塔"结构等特征。     

PETROGRAPHIC AND CHEMICAL CHARACTERIZATION OF POTTERY PRODUCTION OF THE LATE MINOAN I KILN AT HAGHIA TRIADA,CRETE*

Pottery from the Late Minoan I kiln at Haghia Triada in the Mesara Plain, southern Crete, was analysed by a range of techniques, comprising thin‐section petrography, scanning electron microscopy, X‐ray diffraction, X‐ray fluorescence and neutron activation analysis. The project characterizes the ceramic fabrics and probable raw materials, correlates paste recipes with shape, reconstructs the firing conditions of the kiln and establishes a chemical reference group, taking into account post‐burial alteration and contamination. Comparison of the reference group formed with that from the neighbouring, broadly contemporary, kiln at Kommos shows an unexpected differentiation of the two kilns.     

CHEMICAL COMPARISON OF RARE CHINESE WHITE POTTERY FROM FOUR SITES OF THE ERLITOU STATE: RESULTS AND ARCHAEOMETRICAL IMPLICATIONS

White pottery is among the most significant finds from China's earliest state, Erlitou (c. 1900–1500 bc ). Samples were primarily discovered in small numbers from elite tombs of a few sites, leading to the hypothesis that they were made at only a few locations and then circulated regionally as prestige items. To facilitate determining provenances, we compare the ICP–MS trace elements and TIMS Sr isotopes of whiteware with two soil samples from Nanwa, a possible manufacturing site, and with shards found at three other sites: Erlitou, Huizui and Nanzhai. The Nanwa shards demonstrate special elemental and Sr isotopic features. Considering the chemical observation and archaeological background together, we propose that Nanwa was a centre for whiteware production, although the two soil samples we collected there were probably not the exact materials used. Some whiteware pieces from Erlitou, Huizui and Nanzhai fall in the chemical field defined by Nanwa samples, indicating that they were possibly made at Nanwa. Many other samples from these three sites plot outside the Nanwa field, implying they were probably not Nanwa products. This study demonstrates that while chemical sourcing is very useful, firm archaeological context must remain the cornerstone of such research.     

日本五次国土规划中有关旅游政策变迁及其对我国的启示

第二次世界大战后至今,日本先后进行了五次国土规划,每次规划都有旅游规划和旅游政策的相关内容。考察和分析日本国土规划中这种旅游规划政策的变迁过程及其特征,其中有以下几点值得我们借鉴:旅游开发和规划应是国土规划和区域规划的重要内容之一;国土规划中的旅游规划和旅游政策应随社会经济的发展阶段的侧重点不同不断进行修正;在《国土法》中明确提到了有关旅游的内容,加强了国土规划中有关旅游的规划和政策的法律效力;居民居住周边休憩娱乐地的建设和娱乐设施的配套应是旅游规划的重要内容。