Fluids associated with hydrothermal dolomitization in St. George Group,western Newfoundland,Canada

Dolomite reservoirs are increasingly recognized as an important petroleum exploration target, although the application of a hydrothermal dolomite exploration model to these reservoirs remains controversial. The St. George Group of western Newfoundland consists of a sequence of dolomitised carbonates, with significant porosity development (up to 30%) and petroleum accumulations. Fluid inclusion microthermometry and bulk fluid leach analyses indicated that fluids responsible for matrix dolomitization (associated with intercrystalline porosity) and later saddle dolomitization are CaCl₂ ± MgCl₂ rich, high salinity (up to 26 eq. wt% NaCl) brines. Integration of fluid inclusion data with thermal maturation histories from the St. George Group show that these dolomites formed at temperatures higher than the ambient rock temperature, and are therefore hydrothermal in origin. Bulk leach analyses show that dolomitization is associated with influxes of postevaporitic brines (±Cl enriched magmatic fluids) late in the diagenetic history of these carbonates. This dolomitization is possibly Devonian in age, during a period of significant magmatic activity, extensional tectonics and development of hypersaline basins. Petrographic and geochemical similarities between Paleozoic hosted hydrothermal dolomitization in western Newfoundland, eastern Canada and the northeastern United States are consistent with a regional‐scale hydrothermal dolomitization event late in the diagenetic history of these carbonates. Geofluids (2010) 10 , 422–437     

Metropolis on the margins: talent attraction and retention to the St. John's city‐region

The objective of this research is to examine the factors that influence the attraction and retention of creative and highly educated workers in a small‐sized Canadian city. The study examines two hypotheses: that the social dynamics of city‐regions constitute the foundations of economic success in the global economy; and, that talented, highly educated individuals will be attracted to those city‐regions that offer a richness of employment opportunity, a high quality of life, a critical mass of cultural activity and social diversity. The hypotheses are explored through in‐depth interviews with creative and highly educated workers, employers and intermediary organizations. The evidence from the interviews suggests mixed support for the hypotheses. In view of these findings, we contend that the specificities of place must be more carefully theorized in the creative class literature and be more carefully considered by policy‐makers designing policies directed towards attracting and retaining talented and highly educated workers.     

St John's Ambulance Brigade and the Gendering of ‘Passive Defence’ in British Malaya, 1937–42

The St John's Ambulance Brigade established itself in British Malaya in the 1930s, as part of efforts to mobilise and train the colony's subjects for civil defence as the geo‐strategic climate in the Pacific deteriorated. This article demonstrates how the provision of emergency medical care was a gendered and racialised undertaking in the colonial context. Unlike the military, comprising mainly European and ‘trusted’ ethnic Indian soldiers, the realm of ‘passive defence’ was identified as a feminised undertaking for women and ethnic Chinese men who were considered to be either too vulnerable or too disloyal to bear arms. The rapid advance of Japan's military in south‐east Asia violently shattered such social boundaries, as many women and non‐European volunteers found themselves exposed by retreating Allied forces to the Japanese offensive and took up duties at posts from which their European supervisors had been forced to desert. Mainstream military historiography has often been highly gendered towards what is considered as the male‐dominated public domain of the battlefield. In this respect, the involvement of the St John's Ambulance Brigade reveals the process in which colonial ethno‐gender identities and hierarchies were being established, appropriated and subsequently subverted by the exigencies of the war in British Malaya.