Characteristics of relative and radiometric dating technologies
A team of Curtin University geoscientists has discovered the earliest known occurrence of reidite, one of Earth’s rarest minerals.
At 1.2 billion years, the finding is more than double the age of the previous oldest known occurrence at 450 million years. Distributions and compound-specific isotopic signatures of sedimentary chlorins reflect the composition of photoautotrophic communities and their carbon and nitrogen sources in Swiss lakes and the Black Sea Nasdala, L., Corfu, F., Valley, J. J., Wu, F.-Y., Li, Q.-L., Yang, Y.-H., Fisher, C., Münker, C., Kennedy, A. W., Kronz, A., Wiedenbeck, M., Wirth, R., Chanmuang, C., Zeug, M., Váczi, T., Norberg, N., Häger, T., Kröner, A., Hofmeister, W.
Professor Reddy used a technique called electron backscatter diffraction (EBSD) to effectively discriminate between reidite and its compositionally identical host zircon. Dr Lesley Wyborn (NCI) was "pleased to see the Jd LC and the community making progress in achieving what [she] has been trying to achieve for the last 30 years in Australian Geochemistry Laboratories ". Analytical pyrolysis for determining the molecular composition of contemporary monosulfidic black ooze.
The discovery paves the way for developing reidite as a proxy for meteorite impact events that can be extended back in geological time to provide insights into Earth’s early impact record. Tulipani, S., Grice, K., Greenwood, P., Schwark, L., Haines, P. Jd LC is looking forward to expanding its data delivery services to include geochemistry data from its Sensitive High Resolution Ion Micro Probe (SHIMP) and laser ablation instruments in the future. As the downturn in mineral prices continues to drag on Australia’s economy, a project led by Perth’s Curtin University is seeking to create an open access digital mineral inventory of WA that it hopes could stimulate interest in further exploration in the state. Journal of Analytical and Applied Pyrolysis 102, 1-170 Sr-Nd-Pb, and Zircon Hf-O isotopic compositions of eocene-oligocene shoshonitic and potassic adakite-like felsic intrusions in western Yunnan, SW China: Petrogenesis and tectonic implications Petrogenesis of the Early Eocene adakitic rocks in the Napuri area, southern Lhasa: Partial melting of thickened lower crust during slab break-off and implications for crustal thickening in southern Tibet Early Late Cretaceous (ca.
Around 35 people from various research institutions, service providers and the mining industry attended the workshop from across Australia.
The day started with a tour of the John de Laeter Centre (Jd LC) facilities incorporating the Tescan integrated mineral analyser (TIMA; ), which was the key instrument of relevance to the workshop.
• Paul Gottlieb (Tescan Orsay Holding), who summarised the recent technological and software developments at Tescan and discussed future challenges for the TIMA and automated mineralogy.
He said reidite is important because it is only known to form in nature during meteorite impact events.
However, the record of Precambrian impacts is poorly constrained due to the dynamic nature of plate tectonics, erosion and deposition of younger rocks, which may destroy or cover the evidence of ancient impacts. After delivering a presentation on their recently completed Digital Mineralogy Library project, the Jd LC hosts invited their visitors to offer feedback and discuss opportunities for new projects to further assist researchers in managing and disseminating high-value geochemistry datasets. J., Curran M., Edwards R., Faluvegi G., Ghan S., Horowitz L. R., Ming J., Myhre G., Nagashima T., Naik V., Rumbold S. B., Sudo K., Takemura T., Thevenon F., Xu B., Yoon J.-H.
The reidite was discovered using advanced mineral characterisation technologies housed in the John De Laeter Centre (Jd LC) at Curtin University. The response was positive with many participants sharing their views on the importance of data management and discovery, and recognising the contribution that the Jd LC has made in this area. Erratum: Evaluation of preindustrial to present-day black carbon and its albedo forcing from Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP) (Atmospheric Chemistry and Physics 2013.13 (2607-2634))Oxygen reduction voltammetry on platinum macrodisk and screen-printed electrodes in ionic liquids: Reaction of the electrogenerated superoxide species with compounds used in the paste of Pt screen-printed electrodes? on: "Revisiting the "Yanbian Terrane": Implications for Neoproterozoic tectonic evolution of the western Yangtze Block, South China" – [Precambrian Research 151 (2006) 14-30] – [Precambrian Research 154 (2007) 153-157]Li ZX, Bogdanova SV, Collins AS, Davidson A, De Waele B, Ernst RE, Evans DAD, Fitzsimons ICW, Fuck RA, Gladkochub DP, Jacobs J, Karlstrom KE, Lu S, Natapov LM, Pease V, Pisarevsky SA, Thrane K, Vernikovsky V.
In WA’s capital Perth, the state government is sitting on a collection of over 2,000 heavy mineral concentrate samples.
These have been systematically collected and meticulously catalogued by the Geological Survey of Western Australia (GSWA) over the last 30 years of geological mapping. Soil Science Society of America, Book Series 9, Chapter 13.