Mineralization proximal to the final Nuna suture in northeastern Australia

Olierook, Hugo K.H.; Affleck, Robert G.; Evans, Noreen J.; Jourdan, Fred; Kirkland, Christopher L.; Volante, Silvia; Nordsvan, Adam R.; McInnes, Brent; McDonald, Bradley J.; Mayers, Celia; Frew, R. Adam; Rankenburg, Kai; d’Offay, Nic; Nind, M. A. P.; Larking, Adrian

doi:10.1016/j.gr.2020.12.017

Cited by 8 publications

(2 citation statements)

References 97 publications

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“…The thin section was subsequently carbon coated and analysed using a Tescan Integrated Mineral Analyser (TIMA) in the John de Laeter Centre (JdLC), Curtin University, to aid in mineral identification, particularly with respect to identifying dateable minerals [50][51][52] . A TIMA is a field emission gun scanning electron microscope (FEG-SEM), equipped with four electron dispersive X-ray spectrometers (EDS), and capable of recording 420k X-ray counts per second.…”

Section: Thin Section Petrographic Methods and Preparationmentioning

confidence: 99%

Emplacement of the Argyle diamond deposit into an ancient rift zone triggered by supercontinent breakup

Olierook,

Fougerouse,

Doucet

et al. 2023

Nat Commun

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Argyle is the world’s largest source of natural diamonds, yet one of only a few economic deposits hosted in a Paleoproterozoic orogen. The geodynamic triggers responsible for its alkaline ultramafic volcanic host are unknown. Here we show, using U-Pb and (U-Th)/He geochronology of detrital apatite and detrital zircon, and U-Pb dating of hydrothermal titanite, that emplacement of the Argyle lamproite is bracketed between 1311 ± 9 Ma and 1257 ± 15 Ma (2σ), older than previously known. To form the Argyle lamproite diatreme complex, emplacement was likely driven by lithospheric extension related to the breakup of the supercontinent Nuna. Extension facilitated production of low-degree partial melts and their migration through transcrustal corridors in the Paleoproterozoic Halls Creek Orogen, a rheologically-weak rift zone adjacent to the Kimberley Craton. Diamondiferous diatreme emplacement during (super)continental breakup may be prevalent but hitherto under-recognized in rift zones at the edges of ancient continental blocks.

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Section: Thin Section Petrographic Methods and Preparationmentioning

confidence: 99%

Emplacement of the Argyle diamond deposit into an ancient rift zone triggered by supercontinent breakup

Olierook,

Fougerouse,

Doucet

et al. 2023

Nat Commun

Self Cite

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“…An example of this type is the FRANKA series of generators (Institute for Pulsed Power and Microwave Technology, Karlsruhe, Germany) which includes the laboratory facility FRANKA 0, with an output voltage of up to 250 kV, energy storage of 750 J and a pulse repetition rate of up to 5 Hz and the prototype industrial facility FRANKA 2 (FRANKA-Stein), with an output voltage of up to 350 kV and performance of up to 280 kg/h [2]. Many laboratories around the world use SELFRAG LAB systems (SELFRAG AG, Switzerland) [9,[11][12][13][14][15], which are also based on the Marx generator. A SELFRAG LAB system has the following parameters: operating voltage 90-200 kV, frequency 1-5 Hz, pulse front 150 ns.…”

Section: Introductionmentioning

confidence: 99%

An air insulated linear pulse transformer for electrodischarge technology

2021

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A linear pulse transformer with air insulation at atmospheric pressure was created and tested under both constant resistance and non linear loads. The maximum power of the transformer output pulse reached ∼500 MW at a matched load with a charge voltage 50 kV. The transformer transferred ∼60% of the stored energy to the load over a characteristic time of about 1 μs. The scalability the generator was studied by connecting two identical transformers in series which gave a power output of ∼850 MW with doubled output voltage and reduced current. The frequency mode of operation was studied using one and two transformers with a charge voltage of 50 kV and a load that was, close to matched. In both cases, the power maximum and jitter showed no significant changes at any of the frequencies tested (up to 5 Hz). These results mean that the use of this generator can be recommended for a wide field of applications due to its scalability and low internal impedance.

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