Origins of formation waters in the Llanos foreland basin of Colombia: geochemical variation and fluid flow history

Wells located in the Colombian Andean foreland often produce biodegraded hydrocarbons and relatively fresh water (total dissolved solids concentrations of 2000 mg l^?1 dominate across most of the basin). The ratio of water to hydrocarbon in the produced fluids is high and has often been interpreted by explorationists and simulation engineers as being due to massive meteoric water invasion. To challenge this hypothesis, previously published and existing data are compiled here, along with 68 new water samples collected from both the surface (rivers) and subsurface (production wells), which are analyzed for major elements, salinity, and stable isotope compositions. The data indicate a mixed origin for the water, which involves formation water, meteoric water, and a third source that we interpret as being related to diagenetic processes (such as clay dehydration). Analyses of the variation of the parameters from north to south and west to east allow us to define the mixtures as coming from waters of different origins and make it possible to determine the relative contribution of each source.     

‘The One and the Two’: Mainlanders and Saltwater People in Buka,Bougainville

ABSTRACT The paper explores the socially salient contrast between ‘mainlanders' and ‘saltwater people’ in the Buka area in the Autonomous Region of Bougainville, Papua New Guinea, as observed during ethnographic fieldwork in 2004–05. Buka people themselves articulate three at first sight disparate points of contrast between mainlanders and saltwater people. These concern settlement patterns, predominant subsistence activities and different degrees of ancestral knowledge. This paper explores these points and aims to specify their interconnection from the perspective provided by a fourth contrast established ethnographically, that between different modes of objectifying relations on the mainland and ‘at sea’. With a detailed investigation of the ethnographic ‘surface’ of the phenomenon, the paper aims to provide a basis for future in‐depth analyses of various aspects of the mainland‐saltwater contrast in the context of Bougainvillean politics and the sustainability of livelihoods in the area.     

Designing the model European—Liberal and republican concepts of citizenship in Europe in the 1860s: The Association Internationale pour le Progrès des Sciences Sociales

The formation of citizenship as a concept to define the rights of participation in the formation processes of modern territorial states is well known. But the transnational dimensions of defining citizenship and how to combine national legislations with enlightened universal and natural law rules in the mid-19th century is not very well known. The article aims to explore the transnational discourses on the political, economic and moral rights and duties of the citizen in the pan—European liberal Association Internationale pour le Progrès des Sciences Sociales. During the 1860s, its congresses should serve as a vast commission of enquiry and should eventually lead to a general definition of citizenship in Europe which could be implemented in national legislations. The article shows how the Association Internationale tried to deduce universal moral rules from national legislations and peculiarities by the means of moral or positive social science. In combining moral unity with national and regional diversities, the Association Internationale tried to give an elastic framework for a European civil society in which national subjects should become active citizens.     

Obsidian sources and distribution systems in Island Southeast Asia: new results and implications from geochemical research using LA-ICPMS

This paper discusses new evidence of long-distance interaction networks in Island Southeast Asia obtained from geochemical analyses using SEM-EDXA and LA-ICPMS of 101 obsidian samples from 25 locations including seven obsidian sources and 19 archaeological sites. Given that there are obsidian sources distributed throughout much of Island Southeast Asia, the potential for obsidian studies to provide greater understanding of patterns of mobility and exchange in the Pre-Neolithic and Neolithic periods would seem to be considerable. This potential, however, remains largely unrealised as obsidian sourcing has hitherto only been carried out intermittently in Island Southeast Asia using PIXE-PIGME, XRF and other methods.     

Towards Liveable Cities: Progress in the European Union Urban Environmental Agenda

The 2006 “Thematic Strategy on the Urban Environment” is the first piece of official European Union (EU) policy solely focused on the urban environment. It follows a process of several years in which the EU has tried to promote an integrated approach to urban management. During the 2005–2007 “Liveable Cities” project, reflection was given to the “Thematic Strategy”. This resulted in important critiques on the EU's approach to the urban environment. Explaining how the initial top-down approach chosen by the EU contributed to the perceived “failure” of the “Thematic Strategy”, suggestions are made for alternative approaches to the creation of liveable cities in Europe.     

A Ticking Clock? Preservation and Management of Greenland’s Archaeological Heritage in the Twenty-First Century

ABSTRACT

Evaluating the rate of deterioration at archaeological sites in the Arctic presents several challenges. In West Greenland, for example, increasing soil temperatures, perennial thaws, coastal erosion, storm surges, changing microbial communities, and pioneer plant species are observed as increasingly detrimental to the survival of organic archaeological deposits found scattered along the country’s littoral zones and extensive inner fjord systems. This article discusses recent efforts by the REMAINS of Greenland project for developing a standardised protocol that defines the archaeological state of preservation, the preservation conditions, and asset value of organic deposits. Special emphasis is given to the degradation of materials such as bone and wood that are historically observed to be well-preserved in Greenland but now currently at risk. The protocol provides a baseline for monitoring future changes and will assist archaeologists in Greenland with a procedure for documenting and predicting areas of increasing vulnerability due to a warming climate.