Changes in unemployment differentials in Sydney, 1947–76

This paper describes the historical development of spatial patterns of male and female unemployment rates within Sydney at each census year from 1947 to 1976, with two objectives: firstly to review the predictions of traditional urban theory that unemployment will be high in inner city areas because of the workforce characteristics of the residents; secondly, to assess the impact of the decentralisation of firms.     

Monitoring fluid chemistry in iron oxide–copper–gold‐related metasomatic processes,eastern Mt Isa Block,Australia

Most researchers in the Proterozoic eastern Mt Isa Block, NW Queensland, Australia, favour magmatic fluid and salt sources for sodic‐(calcic) alteration and iron oxide–copper–gold mineralization. Here we compare spatial, mineralogic and stable isotope data from regional alteration assemblages with magmatic and magmatic‐hydrothermal interface rocks in order to track chemical and isotopic variations in fluid composition away from inferred fluid sources. Tightly clustered δ¹⁸O values for magnetite, quartz, feldspar and actinolite for igneous‐hosted samples reflect high temperature equilibration in the magmatic‐hydrothermal environment. In contrast, these minerals record predominantly higher δ¹⁸O values in regional alteration and Cu–Au mineralization. This dichotomy reflects partial equilibration with isotopically heavier wallrocks and slightly lower temperatures. Increases in Si concentrations of metasomatic amphiboles relative to igneous amphiboles in part reflect cooling of metasomatic fluids away from igneous rocks. Variations in X_Mg for metasomatic amphiboles indicate local wallrock controls on amphibole chemistry, while variations in X_Cl/X_OH ratios for amphiboles (at constant X_Mg) indicate variable aH₂O/aHCl ratios for metasomatic fluids. Biotite geochemistry also reflects cooling and both increases and decreases in aH₂O/aHCl for fluids away from plutonic rocks. Decreased aH₂O/aHCl ratios for metasomatic fluids reflect in part scavenging of chlorine out of meta‐evaporite sequences, although this process requires already saline fluids. Local increases in aH₂O/aHCl ratios, as well as local decreases in δ¹⁸O values for some minerals (most notably haematite and epithermal‐textured quartz), may indicate ingress of low salinity, low δ¹⁸O fluids of possible meteoric origin late in the hydrothermal history of the region. Taken together, our observations are most consistent with predominantly magmatic sources for metasomatic fluids in the eastern Mt Isa Block, but record chemical and isotopic variations along fluid flow paths that may be important in explaining some of the diversity in alteration and mineralization styles in the district.     

BACK TO BASICS

The review argues that, while Fish's book is undoubtedly a corrective to the most extreme examples of polemical teaching, it oversimplifies the difficulties academics face in trying to create sharp distinctions between politics and scholarship. The radical disconnection he advocates does not address the most difficult situations in which lines cannot be clearly drawn between the substance of academic research and teaching and the politics of the process of knowledge production itself.     

A Sydney and Melbourne comparison of intra-urban differentials in unemployment rates

This article reports on multiple regression analyses of unemployment rates in the local government areas of Sydney and Melbourne which show that the spatial inequalities in unemployment risks may be greater in Sydney than in Melbourne. It explores the reasons for the difference and their implications for future trends in spatial inequalities.     

Granite‐related overpressure and volatile release in the mid crust: fluidized breccias from the Cloncurry District,Australia

The source and transport regions of fluidized (transported) breccias outcrop in the Cloncurry Fe‐oxide–Cu–Au district. Discordant dykes and pipes with rounded clasts of metasedimentary calc–silicate rocks and minor felsic and mafic intrusions extend several kilometres upwards and outwards from the contact aureole of the 1530 Ma Williams Batholith into overlying schists and amphibolites. We used analytical equations for particle transport to estimate clast velocities (≥20 m sec^?1), approaching volcanic ejecta rates. An abrupt release of overpressured magmatic‐hydrothermal fluid is suggested by the localization of the base of the breccias in intensely veined contact aureoles (at around 10 km, constrained by mineral equilibria), incorporation of juvenile magmatic clasts, the scale and discordancy of the bodies, and the wide range of pressure variation (up to 150 MPa) inferred from CO₂ fluid inclusion densities and related decrepitation textures. The abundance of clasts derived from depth, rather than from the adjacent wallrocks, suggests that the pressure in the pipes was sufficient to restrict the inwards spalling of fragments from breccia walls; that is, the breccias were explosive rather than implosive, and some may have vented to the surface. At these depths, such extreme behaviour may have been achieved by release of dissolved fluids from crystallizing magma, in combination with a strongly fractured and fluid‐laden carapace, sitting under a strong, low permeability barrier. The relationship of these breccias to the Ernest Henry iron‐oxide–Cu–Au deposit suggests they may have been sources of fluids or mechanical energy for ore genesis, or alternately provided permeable pathways for later ore fluids.     

Voices from the Margins: Gendered images of ‘Otherness’ in colonial Morocco

The main goal of this essay is to study a book- El Marroc sensual i fanatic - of travel writings written by a Catalan woman traveller, and to put it within the context of the recent scholarship that relates, on the one hand, travel narrative with Orientalism and gender and, on the other, geography and colonialism. The contradictory nature of the contents of the book leads us to challenge the notion of simple 'Othering' as presented in Said's works where the heterogeneity of colonial power is neglected in a totalising dichotomy between the colonising Self and the colonising Other. The contemporary Spanish official discourse was indeed pro-colonial and paternalistic and often drew on notions of shared history and geographical proximity in order to legitimise an 'altruistic' colonial presence. The author's position is very different from this official discourse, but is deeply ambivalent. Her ambivalence arises from her gender which allows her to live the last Spanish colonial adventure as an outsider, and also from her positioning in Spanish politics. The confrontation between different cultures and traditions is sharply delineated in her accounts on Moroccan women, the primary aim of her travel. The (cultural) impermeability of the Others, with whom she would like to identify deeply, yet with whom she cannot really communicate, forces her to construct her own vision of the identity of these Others, projecting her own view of (Western) feminism. The essay demonstrates the importance of focusing on narratives that come from the margins (and particularly from female authors). These provide new perspectives which can destabilise established conceptions of the colonial relationship and, at the same time they can broaden the conceptual and factual history of our disciplines.     

INDUSTRIAL DIVERSIFICATION IN THE CANADIAN URBAN SYSTEM

On the basis of a statistical analysis of their employment profiles, Canadian cities are grouped into four economic categories: manufacturing, mixed, nodal, and a heterogeneous group containing political, military, and mining towns. Indexes of industrial diversification are calculated for all cities for 1951, 1961, and 1971 using comparable data for the three years. It is shown that industrial diversification is significantly related to the economic typology and also to city size; but city size is not related to economic type. Through time, most cities become more diversified as they grow larger, lending support to the theory of import substitution.
Si on se réfère à une analyse statistique de leurs profils d'emploi, on peut regrouper les villes canadiennes en quatre catégories économiques: industrielles, mélangées, nodales, et un groupe hétérogène composé de villes à vocation politique, militaire, et minière. On calcule les indices de diversification industrielle de toutes les villes pour 1951, 1961, et 1971 en utilisant des données comparables pour chaque année. Ils montrent que la diversification industrielle est liée d'une manière significative à la fois au type d'économie et à la taille des villes, mais que celle-ci n'est pas fonction du type d'économie. Au fil du temps, la plupart des villes diversifient leurs activités au fur et à mesure de leur croissance, ce qui vient à l'appui de la théorie du remplacement des importations.     

2. STORYTELLING

Natalie Davis is a quintessential storyteller in the way theorized by Walter Benjamin, Hannah Arendt, and Michel de Certeau. Her work decenters history not simply because it grants agency and so historical visibility to those who have been hidden from history or left on its margins, but also because her stories reveal the complexities of human experience and so challenge the received categories with which we are accustomed to thinking about the world.