Petroleum migration in the Bight Basin: a fluid inclusion approach to constraining source, composition and timing

2017 ◽  
Vol 57 (2) ◽  
pp. 762 ◽  
Author(s):  
Richard Kempton ◽  
Julien Bourdet ◽  
Se Gong ◽  
Andrew Ross ◽  
Jacques Pironon
Keyword(s):  
Information Source ◽  
Offshore Area ◽  
Petroleum Migration ◽  
Geochemical Fingerprinting ◽  
Oil Generation ◽  
Unique Method ◽  
And Migration ◽  
The University ◽  
Great Australian Bight ◽  
Oil Gas

The Bight Basin in southern Australia is a vast under-explored offshore area with promise of, but as of yet, limited proof for hydrocarbons. Fluid inclusions (FIs) offer a unique method to test for petroleum migration, composition and timing, which would otherwise remain hidden in the rocks, and more direct evidence to calibrate basin models. A reconnaissance-scale FI study, using CSIRO’s Grain with Oil Inclusion (GOI™) technique, was undertaken to detect liquid hydrocarbons in Jurassic to Cretaceous sandstones. Oil-bearing, and in some cases gas-rich, inclusions were detected at low abundance, and their presence provides proof of oil generation and migration in the Ceduna Sub-basin. Geochemical fingerprinting of FI oil was undertaken using the Molecular Composition of oil Inclusions (MCI) technique on an intra-Coniacian interval in Gnarlyknots-1A and a Cenomanian interval in Greenly-1. The results show differences in the type of organic matter input, with algal co-sourcing significant for the central Ceduna Sub-basin. The timing of oil migration from pressure-temperature (PT) reconstructions was interpreted in Gnarlyknots-1A, Greenly-1, Duntroon-1 and Potoroo-1. The results indicate oil charge during the Late Cretaceous in the basin depocentres, explained by sediment loading of the Upper Cretaceous succession by the Hammerhead Supersequence and oil, gas-condensate and gas charge to the depocentres and basin margins during the Miocene. The Great Australian Bight Research Program is a collaboration between BP, CSIRO, the South Australian Research and Development Institute (SARDI), the University of Adelaide and Flinders University. The Program aims to provide a whole-of-system understanding of the environmental, economic and social values of the region, providing an information source for all to use.

scholarly journals Is Scotland Different on Race and Migration?

2018 ◽  
Vol 27 (3) ◽  
pp. 382-387
Author(s):  
Alistair Hunter ◽  
Nasar Meer
Keyword(s):  
Racial Minorities ◽  
Policy Options ◽  
Short Article ◽  
University Of Edinburgh ◽  
And Migration ◽  
The University

This short article reports on a symposium at the University of Edinburgh entitled ‘Is Scotland Different on Race and Migration’. The event brought together the latest research to consider whether Scotland really is different from neighbouring countries. Questions under discussion included, but were not limited to, what does the data tell us on mass Scottish attitudes? Is ‘Scottishness’ more inclusive then ‘Englishness’? Where do migrants and racial minorities fit into this story and who is narrating it? What are Scotland's policy options in light of it?

Abundance and size of European lobsters (Homarus gammarus) and brown crabs (Cancer pagurus) inside and outside the Kåvra lobster reserve (west coast of Sweden)

Crustaceana ◽  
2020 ◽  
Vol 93 (2) ◽  
pp. 157-169
Author(s):  
Vidar Øresland ◽  
Gert Oxby ◽  
Fredrik Oxby
Keyword(s):  
Size Distribution ◽  
Relative Abundance ◽  
West Coast ◽  
Outer Part ◽  
Swedish West Coast ◽  
Offshore Area ◽  
Homarus Gammarus ◽  
Cancer Pagurus ◽  
And Migration ◽  
The Impact

Abstract The common method of using lobster-pot catch data for investigating relative abundance, sex and size distribution has serious disadvantages. This study estimates relative abundance and size of the European lobster Homarus gammarus and the brown crab Cancer pagurus using scuba diving techniques. The study areas were the Kåvra lobster reserve (Kåvra) on the Swedish west coast and three very different nearby areas where fishing for crustaceans is allowed: Gullmarsfjorden; the archipelago; and the offshore area. A total of 167 lobsters and 337 brown crabs were observed during 33 scuba dives (each 30 minutes long) in 2018-2019. The estimated mean abundance of lobsters was three to fifteen times as high at Kåvra in comparison with the other three areas (all exact showing that the statistical populations were distinct in comparison with Kåvra; Wilcoxon-Mann-Whitney Test). Dive sites in the outer part of the offshore area had the lowest abundance of lobsters although they had seemingly good lobster habitats and low fishing intensity. Large lobsters with a carapace length of ⩾15 cm were found only at Kåvra where they made up 24% of the lobsters. The proportion of large lobsters inside Kåvra continues to increase after 30 years of protection. Together, this emphasizes the impact of fishing on lobster abundance and size distribution, and indicates that limited recruitment and migration might possibly affect offshore lobster “sub populations”. Kåvra was the only area where the abundance of lobsters exceeded the abundance of brown crabs (). However, the abundance of brown crabs at Kåvra was as low as in Gullmarsfjorden () where fishing for crabs is allowed. Possible complex lobster/brown crab interactions together with other factors that might explain the low abundance of the protected brown crab at Kåvra, need to be investigated further.

scholarly journals Academic Misconduct: An Investigation into Male Students’ Perceptions, Experiences & Attitudes towards Cheating and Plagiarism in a Middle Eastern University Context

2016 ◽  
Vol 6 (1) ◽  
pp. 158 ◽  
Author(s):  
Bilal M. Tayan
Keyword(s):  
Undergraduate Students ◽  
Academic Dishonesty ◽  
Information Source ◽  
Middle Eastern ◽  
Academic Misconduct ◽  
The Internet ◽  
First Year ◽  
Male Undergraduate ◽  
Students Attitudes ◽  
The University

Academic misconduct in many educational institutions in the Middle East is an inherent problem. This has been particularly true amongst the university student population. The proliferation of the Internet and the ownership of mobile and electronic devices, have, in part, witnessed rates of cheating, plagiarism and academic misconduct cases steadily increase across higher education contexts. Though the growth of the Internet as an information source and gateway to knowledge has increased substantially in recent years, it has, however, opened up a plethora of varying forms and rates of academic dishonesty. This study was conducted through an online Likert scale questionnaire. Its purpose was to investigate first year male undergraduate students’ attitudes, experiences and perceptions towards plagiarism and cheating in a university located in Saudi Arabia. The study aimed at addressing themes in relation to the meaning, forms, source, frequency and reasons of cheating and plagiarism. The study indicates that cheating and plagiarism is common among students, while a need to address student awareness and clarify student expectations towards academic integrity was also identified. The study also proposes several recommendations to alleviate the levels of academic misconduct, be it cheating in exams or plagiarising content, in the Saudi university context.

SEM Backscattered-Electron Images of Paint Cross Sections as Information Source for the Presence of the Lead White Pigment and Lead-Related Degradation and Migration Phenomena in Oil Paintings

2011 ◽  
Vol 17 (5) ◽  
pp. 696-701 ◽  
Author(s):  
Katrien Keune ◽  
Annelies van Loon ◽  
Jaap J. Boon
Keyword(s):  
Cross Sections ◽  
Layer Structure ◽  
Information Source ◽  
Particle Morphology ◽  
Paint System ◽  
Lead White ◽  
White Pigment ◽  
Oil Paintings ◽  
Backscattered Electron ◽  
And Migration

AbstractScanning electron microscopy backscattered-electron images of paint cross sections show the compositional contrast within the paint system. They not only give valuable information about the pigment composition and layer structure but also about the aging processes in the paint. This article focuses on the reading of backscatter images of lead white-containing samples from traditional oil paintings (17th–19th centuries). In contrast to modern lead white, traditional stack process lead white is characterized by a wide particle size distribution. Changes in particle morphology and distribution are indications of chemical/physical reactivity in the paint. Lead white can be affected by free fatty acids to form lead soaps. The dissolution of lead white can be recognized in the backscatter image by gray (less scattering) peripheries around particles and gray amorphous areas as opposed to the well-defined, highly scattering intact lead white particles. The small particles react away first, while the larger particles/lumps can still be visible. Formed lead soaps appear to migrate or diffuse through the semipermeable paint system. Lead-rich bands around particles, at layer interfaces and in the paint medium, are indications of transport. The presence of lead-containing crystals at the paint surface or inside aggregates furthermore point to the migration and mineralization of lead soaps.

Sign in / Sign up

Export Citation Format

Share Document