Distribution of Fenitized Crustal Xenoliths in Carbonatite Intrusions, West-Central Arkansas

Crustal xenoliths from carbonatite intrusions in the Morrilton-Perryville Arkansas area display a variety of mineralogical and textural features that suggest that they are fragments of basement crystalline rock that has undergone sodic metasomatism resulting from their close proximity at depth to a carbonatite complex. With increasing degrees of fenitization, the leucocratic xenoliths range from granolite - syenite - analcite syenite, while the melanocratic xenoliths range from hornblende - biotite to aegerine-apatite. A definite increase in fenitization is observed from Morrilton in the north to Brazil Branch, 16.8 km to the south. Fenitized xenoliths from Brazil Branch are generally quite small (0.5 cm - 1.0 cm) and contain a substantial amount of analcite. At Morrilton Lock and Dam, the fenitized xenoliths are very large (1.0 cm - 2.5 cm), and granolites are common. The xenoliths at Oppello Dump are intermediate in both size and mineralogical character. This area is therefore interpreted as a single alkalic - carbonatitic complex at depth, with its center near the southern extremity of the sampled area

The Formal, the Informal, and the Precarious: Making a Living in Urban Papua New Guinea

For many Papua New Guineans, the dominant accounts of 'the economy' � contained within development reports, government documents and the media � do not adequately reflect their experiences of making a living. Large-scale resource extraction, the private sector, export cash cropping and wage employment have dominated these accounts. Meanwhile, the broader economic picture has remained obscured, and the diversity of economic practices, including a flourishing 'informal' economy, has routinely been overlooked and undervalued. Addressing this gap, this paper provides some grounded examples of the diverse livelihood strategies people employ in Papua New Guinea's growing urban centres. We examine the strategies people employ to sustain themselves materially, and focus on how people acquire and recirculate money. We reveal the interconnections between a diverse range of economic activities, both formal and informal. In doing so, we complicate any clear narrative that might, for example, associate waged employment with economic security, or street selling with precarity and urban poverty. Our work is informed by observations of people's daily lives, and conversations with security guards (Stephanie Lusby), the salaried middle class (John Cox), women entrepreneurs (Ceridwen Spark), residents from the urban settlements (Michelle Rooney) and betel nut traders and vendors (Timothy Sharp). Collectively, our work takes an urban focus, yet the flows and connectivity between urban and rural, and our focus on livelihood strategies, means much of our discussion is also relevant to rural people and places. Our examples, drawn from urban centres throughout the country, each in their own way illustrate something of the diversity of economic activity in urban PNG. Our material captures the innovation and experimentation of people's responses to precarity in contemporary PNG.AusAI