Microstructural evolution and trace element mobility in Witwatersrand pyrite

Microstructural analysis of pyrite from a single sample of Witwatersrand conglomerate indicates a complex deformation history involving components of both plastic and brittle deformation. Internal deformation associated with dislocation creep is heterogeneously developed within grains, shows no systematic relationship to bulk rock strain or the location of grain boundaries and is interpreted to represent an episode of pyrite deformation that predates the incorporation of detrital pyrite grains into the Central Rand conglomerates. In contrast, brittle deformation, manifest by grain fragmentation that transects dislocation-related microstructures, is spatially related to grain contacts and is interpreted to represent post-depositional deformation of the Central Rand conglomerates. Analysis of the low-angle boundaries associated with the early dislocation creep phase of deformation indicates the operation of {100} slip systems. However, some orientation boundaries have geometrical characteristics that are not consistent with simple {100} deformation.These boundaries may represent the combination of multiple slip systems or the operation of the previously unrecognized {120} slip system. These boundaries are associated with order of magnitude enrichments in As, Ni and Co that indicate a deformation control on the remobilization of trace elements within pyrite and a potential slip system control on the effectiveness of fast-diffusion pathways. The results confirm the importance of grain-scale elemental remobilization within pyrite prior to their incorporation into the Witwatersrand gold-bearing conglomerates. Since the relationship between gold and pyrite is intimately related to the trace element geochemistry of pyrite, the results have implications for the application of minor element geochemistry to ore deposit formation, suggest a reason for heterogeneous conductivity and localized gold precipitation in natural pyrite and provide a framework for improving mineral processing

Do communities understand the impacts of unlawful bushmeat hunting and trade? Insights from villagers bordering Western Nyerere National Park Tanzania

Assessing local people's understanding of the consequences of unsustainable bushmeat-related activities on conservation is an important step toward developing effective solutions to decrease unlawful hunting activities. The current study investigated the knowledge regarding the ecological and socioeconomic impacts of illegal bushmeat activities among villagers adjacent to western Nyerere National Park Tanzania. The two terminologies i.e., “hunting” and “trade” were collectively used herein as “bushmeat trade”. We collected data from 261 households and 24 key informants using a semi-structured questionnaire and an interview guide, respectively. Results show that 84% of local residents know that bushmeat trade directly threatens wildlife by reducing the population of hunted species. Nearly half of the respondents also appreciate the benefits of wildlife conservation. Regarding the trend of bushmeat trade in the study area, the majority (80%) of the respondents stated that the activity is decreasing. Moreover, the study revealed that the knowledge variation regarding the impacts of bushmeat trade is significantly influenced by education level, age and proximity to the park boundaries. Interventions aimed at addressing the illegal bushmeat trade should consider demographic factors and ensure that conservation programmes are extended to both nearby and distant villages from the park boundaries for enhanced and impactful results

The knowledge about the potential health risks of illegal bushmeat activities among local communities adjacent to Western Nyerere National Park, Tanzania

Establishing knowledge of local communities regarding the potential health risks of illegal bushmeat hunting and its related practices is among the essential means to developing effective conservation and public health programs. To reveal the understanding of the local people regarding the potential health risks of bushmeat consumption and handling of wildlife products, we used a semi-structured questionnaire to survey 261 households in eight villages located adjacent to the western part of Nyerere National Park. Also, we interviewed eight key informants, including conservation personnel and veterinary officers, in the study area. The proportion of local people who were unaware that handling of wildlife products and bushmeat consumption were risky behaviours towards acquiring zoonotic diseases was slightly higher (57%) than the proportion of respondents who were aware of the likely risks of zoonotic diseases from the practices. After all, the majority (83%) of local people admitted having come into contact with wildlife products, while over 70% reported having consumed bushmeat. We found that local communities living closer to the park boundaries

The knowledge about the potential health risks of illegal bushmeat activities among local communities adjacent to Western Nyerere National Park, Tanzania

Establishing knowledge of local communities regarding the potential health risks of illegal bushmeat hunting and its related practices is among the essential means to developing effective conservation and public health programs. To reveal the understanding of the local people regarding the potential health risks of bushmeat consumption and handling of wildlife products, we used a semi-structured questionnaire to survey 261 households in eight villages located adjacent to the western part of Nyerere National Park. Also, we interviewed eight key informants, including conservation personnel and veterinary officers, in the study area. The proportion of local people who were unaware that handling of wildlife products and bushmeat consumption were risky behaviours towards acquiring zoonotic diseases was slightly higher (57%) than the proportion of respondents who were aware of the likely risks of zoonotic diseases from the practices. After all, the majority (83%) of local people admitted having come into contact with wildlife products, while over 70% reported having consumed bushmeat. We found that local communities living closer to the park boundaries