Surface controls on the characteristics of natural CO2 seeps: implications for engineered CO2 stores

CO₂ injected into rock formations for deep geological storage must not leak to surface, since this would be economically and environmentally unfavourable, and could present a human health hazard. In Italy natural CO₂ degassing to the surface via seeps is widespread, providing an insight into the various styles of subsurface ‘plumbing’ as well as surface expression of CO₂ fluids. Here we investigate surface controls on the distribution of CO₂ seep characteristics (type, flux and temperature) using a large geographical and historical data set. When the locations of documented seeps are compared to a synthetic statistically random data set, we find that the nature of the CO₂ seeps is most strongly governed by the flow properties of the outcropping rocks, and local topography. Where low‐permeability rocks outcrop, numerous dry seeps occur and have a range of fluxes. Aqueous fluid flow will be limited in these low‐permeability rocks, and so relative permeability effects may enable preferential CO₂ flow. CO₂ vents typically occur along faults in rocks that are located above the water table or are low permeability. Diffuse seeps develop where CO₂ (laterally supplied by these faults) emerges from the vadose zone and where CO₂ degassing from groundwater follows a different flow path due to flow differences for water and CO₂ gas. Bubbling water seeps (characterized by water bubbling with CO₂) arise where CO₂ supply enters the phreatic zone or an aquifer. CO₂‐rich springs often emerge where valleys erode into CO₂ aquifers, and these are typically high flux seeps. Seep type is known to influence human health risk at CO₂ seeps in Italy, as well as the topography surrounding the seep which affects the rate of gas dispersion by wind. Identifying the physical controls on potential seep locations and seep type above engineered CO₂ storage operations is therefore crucial to targeted site monitoring strategy and risk assessment. The surface geology and topography above a CO₂ store must therefore be characterized in order to design the most effective monitoring strategy.     

Response of Alum Rock springs to the October 30, 2007 Alum Rock earthquake and implications for the origin of increased discharge after earthquakes

The origins of increased stream flow and spring discharge following earthquakes have been the subject of controversy, in large part because there are many models to explain observations and few measurements suitable for distinguishing between hypotheses. On October 30, 2007 a magnitude 5.5 earthquake occurred near the Alum Rock springs, California, USA. Within a day we documented a several‐fold increase in discharge. Over the following year, we have monitored a gradual return towards pre‐earthquake properties, but for the largest springs there appears to be a permanent increase in discharge. The Alum Rock springs discharge waters that are a mixture between modern (shallow) meteoric water and old (deep) connate waters expelled by regional transpression. After the earthquake, there was a small and temporary decrease in the fraction of connate water in the largest springs. Accompanying this geochemical change was a small (1–2°C) temperature decrease. Combined with the rapid response, this implies that the increased discharge has a shallow origin. Increased discharge at these springs occurs both for earthquakes that cause static volumetric expansion and for those that cause contraction, supporting models in which dynamic strains are responsible for the subsurface changes that cause flow to increase. We make a quantitative comparison between the observed changes and model predictions for three types of models: (i) a permanent increase in permeability; (ii) an increase in permeability followed by a gradual decrease to its pre‐earthquake value; and (iii) an increase of hydraulic head in the groundwater system discharging at the springs. We show that models in which the permeability of the fracture system feeding the springs increases after the earthquake are in general consistent with the changes in discharge. The postseismic decrease in discharge could either reflect the groundwater system adjusting to the new, higher permeability or a gradual return of permeability to pre‐earthquake values; the available data do not allow us to distinguish between these two scenarios. However, the response of these springs to another earthquake will provide critical constraints on the changes that occur in the subsurface and should permit a test of all three types of models.     

PHYSICOCHEMICAL COMPOSITIONAL ANALYSIS OF CERAMICS: A CASE STUDY IN KENTING,TAIWAN*

The composition of ceramics does not just reflect the component of some specific, unprocessed, geological, raw material source, but also certain forms of human behaviour involved in its manufacture. The purpose of this research project is to apply the acid‐extraction chemical method, complemented by a thin‐section petrographic study, to the compositional analyses of certain local ceramic collections (mainly from several sites in the southern Taiwan area). The results present the raw materials that the ceramic manufacturers of the two cultural traditions (O‐laun‐pi Phase II and Phase III–IV), which overlapped temporally, used. These materials came from the same sources, but the ceramics were manufactured in different ways. Particularly, the people of O‐laun‐pi Phase III–IV also procured certain materials from either local sources or from somewhere in eastern Taiwan to make their pots. The results also indicate that there might have been a variation in terms of their manufacture among sites of the same cultural tradition.     

STUDYING TECHNOLOGICAL PRACTICES AT A LOCAL LEVEL: NEUTRON ACTIVATION AND PETROGRAPHIC ANALYSES OF EARLY CERAMIC PERIOD POTTERY IN CENTRAL CHILE*

We discuss neutron activation and petrographic analyses of domestic ceramics and some raw materials from five archaeological sites in the Valdivia de Paine locality, in Central Chile. During the time period studied, the area was occupied by small‐scale horticultural groups with disperse and sedentary or semi‐sedentary settlement patterns. The analyses indicate that diverse local raw material sources were used in pottery production, and shared by members of different co‐residential units and between different cultural groups. The data indicate as many similarities as differences among the technological practices of pottery‐producing groups who lived in spatial proximity. The results have implications for the understanding of pottery‐producing communities at a local level, as well as small‐scale groups in general.     

The Study of Local Waters in the Deserts of the USSR

A review of potential local fresh-water sources in the deserts for the use of livestock herds, herders' settlements, and extractive and other industrial enterprises. One of the most promising approaches is held to be the use of takyrs [clay pans] as catchment areas for ephemeral runoff of precipitation, which is then directed into natural aquifers or artificial underground storage cisterns. Another potential source of water is large perched ground-water lenses that could be tapped by paired wells to prevent the intrusion of salt water from below. Artesian waters in the desert which are far from areas of recharge are found to be largely saline.     

“Removes All Obstacles”: Abortifacients in Nineteenth-Century Toronto and Beyond

Exploring the biographies of small artifacts from archaeological contexts is an endeavour that can expose unrealized or forgotten historical and cultural meaning at local, regional, national, and international levels. The recovery of a small glass bottle embossed with the name “Sir J. Clarke’s Female Pills” from a site in Toronto has drawn together the production history and advertising during the nineteenth century of a patent medicine product classed as an abortifacient. Furthermore, it connects the history of women’s health and fertility rights to the social and economic motivations influencing control over family planning.     

Barite–pyrite mineralization of the Wiesbaden thermal spring system, Germany: a 500-kyr record of geochemical evolution

Barite–(pyrite) mineralizations from the thermal springs of Wiesbaden, Rhenish Massif, Germany, have been studied to place constraints on the geochemical evolution of the hydrothermal system in space and time. The thermal springs, characterized by high total dissolved solids (TDS) contents and predominance of NaCl, ascend from aquifers at 3–4 km depth and discharge at a temperature of 65–70°C. The barite–(pyrite) mineralization is found in upflow and discharge zones of the present‐day thermal springs as well as at elevations up to 50 m above the current water table. Hence, this mineralization style constitutes a continuous record of the hydrothermal activity, linking the past evolution with the present state of this geothermal system. The sulphur isotope signatures of the mineralization indicate a continuous decrease of the δ³⁴S of sulphate from +16.9‰ in the oldest barite to +10.1‰ in the present‐day thermal water. The δ³⁴S values of barite closely resemble various recently active thermal springs along the southern margin of the Rhenish Massif and contrast strongly with different regional ground and mineral waters. The mineralogical and isotopic signatures, combined with calculations based on uplift rates and the regional geological history, indicate a minimum activity of the thermal spring system at Wiesbaden of about 500 000 years. This timeframe is considerably larger than conservative models, which estimate the duration of thermal spring systems in continental intraplate settings to last for several 10 000 years. The calculated equilibrium sulphur isotope temperatures of coexisting barite and pyrite range between 65 and 80°C, close to the discharge temperature of the springs, which would indicate apparent equilibrium precipitation. Kinetic modelling of the re‐equilibration of the sulphate–sulphide pair during water ascent shows that this process would require 220 Myr. Therefore, we conclude that pyrite is formed from precursor Fe monosulphide phases, which rapidly precipitate in the near‐surface environment, preserving the isotope fractionation between dissolved sulphate and sulphide established in the deep aquifer. Equilibrium modelling of water–mineral reactions shows slight supersaturation of barite at the discharge temperature. Pyrite is already strongly supersaturated at the temperatures estimated for the aquifer (110°C) and processes in the near‐surface environment are most probably related to contact of the thermal water with atmospheric oxygen, resulting in formation of oxidized intermediate sulphur species and precipitation of Fe monosulphide phases, which subsequently recrystallize to pyrite.     

New Data on the Soda Flux Used in the Production of Iznik Glazes and Byzantine Glasses

Previous research has shown that Iznik glazes are characterized by low potash and magnesia contents. It was therefore suggested that the flux used was either a purified plant ash or some unidentified mineral source of soda. More recently, as a result of the detection of small, but significant, amounts of boron and lithium in Byzantine glasses from western Turkey, which also exhibit low potash and magnesia contents, it has been suggested that the source of the flux used was a soda‐rich evaporite associated in some way with the extensive borax deposits in the region. LA–ICP–MS has been used to establish that Iznik glazes also contain similarly small amounts of boron and lithium. The Na/K, Na/Mg, Na/Ca and Na/B ratios for these Iznik glazes are shown to be comparable to the equivalent ratios calculated from published data for waters from a range of Na–HCO₃ type hot springs in western Turkey, with the closest match being to the hot springs around Afyon‐Gazligöl, which is consistent with documentary evidence. It is therefore proposed that the soda‐rich salts produced by evaporating water from these springs to dryness would have provided the flux required for the production of Iznik glazes and high‐boron Byzantine glasses.     

House Types in Tanzania: A Century of Change

The spatial analysis of cultural change is the focus of this study. The house types in Tanzania and changes in their spatial distribution for the century between I860 and 1965 provide an important indicator of changing cultural variations on a country—wide scale. The housing oj Tanzanians is more likely to reflect their cultural traditions than houses in the industrialized areas of the world because the overwhelming proportion of the people build their own houses. Approximately 100 references from European explorers, anthropologists and governmental records, as well as extensive personal observations in the early 1960s are used to reconstruct the spatial pattern of house types in three general time periods. The house types of some groups have changed in response to cultural contacts resulting from movements of people and ideas. House type analysis based on the systematic use of a wide variety of sources enables the spatial patterns of historical cultural landscapes to be reconstructed and trends identified. Although this methodology can be applied in a variety of geographical areas, it is especially valuable for areas such as tropical Africa where most of the material culture does not remain extant for more than about one generation.     

Prices and Politics in Andean Water Reforms

Water rights are best understood as politically contested and culturally embedded relationships among different social actors. In the Andean region, existing rights of irrigators’ collectives often embody historical struggles over resources, rules, authorities and identities. This article argues, first, that the neo‐liberal language that is increasingly used in water policies is ill‐suited for recognizing and dealing with these social, cultural and political dimensions of water distribution. Local water rules and rights, their dynamics, and the way they are linked to power relations, local identities and contextualized constructions of legitimacy, remain invisible in neo‐liberal policy discourse. Second, this same discourse actively destroys these local rights systems and presents itself as the only viable cure to the problems it generates. The ways in which local irrigators’ collectives attempt to protect their water security raise questions about the fundaments and effects of neo‐liberal water reforms, but these questions are neglected or poorly understood. This article proposes a more situated, layered and contextualized approach to Andean water questions, not just to improve representational accuracy but also to increase political visibility and legitimacy of peasant and indigenous water claims. What is needed is not just a new ‘typology’ or ‘taxonomy’ of water rights, but an alternative ‘water rights ontology’ that understands locally existing norms and water control practices, and the power relations that inform and surround them, as deeply constitutive of water rights.     

高级人才成材因素的初步研究--中国科学院院士成材背景的统计分析

中国科学院院士时空分布的主要特点是：(1)空间上以水域广阔、特别是水域面积／山地面积较大的地方为多,主要是东南沿海地区,尤其是江浙一带;(2)时间上以20世纪初出生者最多,这主要是教育、历史及院士增选过程的原因。以上特点是自然地理环境、经济水平、教育水平、家庭背景以及悠久的历史文化背景等因素综合作用的结果。本文系统地考察了中国科学院院士成材的背景,用统计分析的方法探讨了我国高级人才的分布规律,指出自然因素、经济一文化因素和教师、家庭等对高级人才成长的影响机制,为科教兴国战略的实施提供参考和依据。     

Gendered images of the German nation: the Romantic painter Friedrich Kersting and the patriotic‐national discourse during the Wars of Liberation

ABSTRACT. The article analyses the oeuvre of Friedrich Kersting (1875–1847), a now largely forgotten Romantic painter, and other gendered images of the German nation that were created among his circle of friends but also in the wider context of the patriotic‐national discourse during the Prussian Wars of Liberation. The paper combines the findings of art historical research with those of history and cultural studies. In so doing, it deconstructs gendered images of the nation in the patriotic‐national discourse during the Wars of Liberation and their political importance during that time. The main focus of the analysis is the interrelationship between visual imagery, discursively formed patriotic‐national concepts in the topical literature, cultural practices and individual experience.     

Earthquake‐related temperature changes in two neighboring hot springs at Xiangcheng,China

Pre‐earthquake and postearthquake temperature changes were documented in two hot springs at Xiangcheng. Pre‐earthquake changes were documented in spring I, 13 days before and 106 km away from the M_s 5.8 Zhongdian earthquake. The 11‐year cutoff spring spouted again, and the spouted water was 24°C hotter than the former escaping gas. Postearthquake changes were documented in spring II following the 2008 M_w 7.9 Wenchuan earthquake, approximately 425 km away from the epicenter. Temperature in spring II showed a step‐like increase with a magnitude of 4°C induced by the earthquake. Spring I which is 0.3 m apart from spring II did not show a sudden change following the earthquake. However, temperatures in the two springs were identical after the Wenchuan earthquake. It indicates that the earthquake generated new hydraulic connectivity between springs I and II, and the heat transport between the two springs accounts for the postearthquake temperature changes.     

Heating the house. An archaeological and archaeometrical investigation into the tile-stoves of late-medieval Flanders,Belgium (14–17th centuries)

SUMMARY: Tile stoves arise in the Low Countries from the 14th century onwards. Although they have been well documented in northern and central Europe, they have remained an almost forgotten aspect of the material culture of the historic county of Flanders (Belgium). In recent years the amount of stove tiles found in archaeological excavations has increased considerably, raising questions concerning their production and origin. Micro X-ray fluorescence spectroscopy was used to determine the elemental composition of these tiles to see if they could be divided into groups and what these groups could tell us about the distribution of workshops, resources and finished products.     

Making heritage in an Australian coastal tourist resort: Constructing a cultural landscape through a comparative narrative

Abstract

The concept of cultural landscape embodies a dynamic understanding of history, in which past, present and future are seamlessly connected. This paper, drawn from a larger research project investigating the integration of tourism in small coastal settlements, introduces a multi‐method research strategy for interpreting cultural landscapes of tourism. The case study of a well‐known resort area on the east coast of Australia demonstrates the dynamic relationship between patterns in the landscape narrative and patterns in the built environment of small coastal settlements. In Noosa, a distinctive built form has evolved in parallel with the narrative of the place as a relaxed but stylish resort village dominated by nature. Both the narrative and physical landscape have been shaped by local and external processes of constant comparison and contrast with well known Australian and international coastal resorts. The paper illustrates how recurring themes in the local dialogue of place have flowed between key urban design/planning decisions, ephemeral tourism literature, publications, and the perceptions of residents, tourists and key informants as reported in focused conversational interviews.     

Unravelling the Relationships between Used‐Clothing Imports and the Decline of African Clothing Industries

African clothing industries have declined since the implementation of economic liberalization policies in the early 1980s whilst used‐clothing imports to Africa have increased. The general effects of economic liberalization on African clothing industries are well documented, although little research has been conducted on the particular impact of increased imports of second‐hand clothes on the local manufacturing sectors. Whether these two processes are causally related is difficult to determine due to limitations in official data sets. In this article, the used‐clothing trade is explored in detail and a broad range of cultural and local economic processes are investigated. Trends such as declining local purchasing power and the opening of African markets to cheap new clothing imports, as well as imports of used‐clothing, are examined, along with the converse boost to African clothing export production resulting from preferential trade agreements in the 2000s. With respect to the differential legal and illegal imports of second‐hand clothing to selected African countries, it is demonstrated that official trade data sets often fail to capture the nuances of contemporary social and economic processes.     

Java's forgotten pearls: the history and disappearance of pearl fishing in the Segara Anakan lagoon, South Java, Indonesia

Pearls have been a valued resource in most cultures that had access to them. A number of historically important pearling grounds were situated in the waters around today's Indonesia. One of these areas, now largely forgotten, was the Segara Anakan lagoon in South Java. In the seventeenth century, Dutch colonists exploited the lagoon's pearls. Afterwards, the lagoon's oysters were locally exploited as a food item until the late 1970s. While the pearl fishery attracted considerable attention in the colonial literature, its disappearance, by contrast, went largely undocumented. Nowadays, the oysters no longer are found in the lagoon as a result of extensive sedimentation processes. Their former existence is only preserved in the memory of local people. This article examines the history and fate of the pearls of Segara Anakan, providing an example of a formerly valued species whose existence simply became forgotten outside the area.     

Ecological Patterns in the Upper Pleistocene and Holocene in the Jebel Gharbi, Northern Libya: Chronology, Climate and Human Occupation

Surveys and test excavations in the Jebel Gharbi have brought to light a large quantity of prehistoric sites indicating intensive human occupation from the Upper Pleistocene to the Holocene. Several radiometric dates (standard ¹⁴C, AMS and U/Th) provide a detailed framework of the absolute chronology of the local peopling of the area. Generalised Middle Stone Age archaeological materials represent the earliest term of reference in the geological series. Aterian complexes are well-represented, being widely spread throughout the mountain range and in the lowlands. Lower Later Stone Age, or “Dabban”, artefacts are also attested to both geological and archaeological sequences. Human occupation continued with the Upper and Final Epipalaeolithic (or “Iberomaurusian”) and later, with Capsian and Neolithic groups. Permanent and seasonal water springs and raw material sources influenced settlement strategy and selected areas offered particularly favourable conditions and became intensively occupied.     

Neolithic cremation in south‐east Arabia: archaeological and anthropological observations at FAY‐NE10 in the Emirate of Sharjah (UAE)

Small fragments of cremated human bone, clearly representing numerous individuals, were found in a stratified Neolithic context in a small cave at Jebel Faya in the Central Region of the Emirate of Sharjah, United Arab Emirates. With radiocarbon dates between 6500 and 5800 cal BC, they are among the earliest well‐documented cases of cremations in south‐west Asia. Taxonomic identification of the small burned bone fragments is based on morphological and histological analysis. The deposits are to date the oldest human remains found in south‐east Arabia and represent a phase during the Middle Neolithic for which no other types of burials have yet been documented.     

The Memory of Slavery at Saint Louis University

This essay examines both the history and memory of slavery at Saint Louis University (SLU). The essay argues that, despite the fact that slavery and slaves featured prominently in the university's early history, later members of the SLU and St. Louis community have forgotten or misremembered the role of human bondage in the school's past. This process of forgetting is particularly notable given the fact that SLU is a Jesuit University that plays a prominent role in the cultural, educational, and economic life of the city of St. Louis. The essay will analyze the process by which the role of slavery at SLU has been forgotten before concluding with suggestions for how the topic might be treated in the future.