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36 results on '"Dalton, Hayden"'

6. Basanite cobbles in Pleistocene sediments in Central Otago and their implications for intraplate volcanism and Clutha River paleo-drainage

Author

Scott, James M., Cooper, Alan F., Craw, Dave, le Roux, Petrus J., Dalton, Hayden B., and Palmer, Marshall C.

Abstract

ABSTRACTThe occurrence of volcanic basanite cobbles in Pleistocene terraces at Galloway and in the upper Clutha valley in Central Otago, in an area devoid of known volcanic edifices, has implications for Cenozoic intraplate volcanism and Pleistocene drainage in the region. We present petrographic, mineralogical, whole rock geochemical and Sr-Nd-Pb isotopic data, as well as an 39Ar-40Ar date of 24.4 ± 0.06 Ma, together with mineral analyses of enclosed peridotite xenoliths. We conclude from this dataset that these alkaline basanite cobbles are most likely derived from the Alpine Dike Swarm in northwest Otago, probably in the Lake Wanaka-Hawea-Luggate area, which extends the volcanic field east of its known extent. The pilotaxitic textures and presence of intersertal glass, along with the volume of basanitic material, suggests that the source rocks were likely effusive, which would make this the first such known component of the Alpine Dike Swarm and requires emergent land at that time. The occurrence of the Galloway basanite cobbles implies that Pleistocene Clutha River flowed through or over what is now the Dunstan Range. The young (late Pleistocene) age of all the basanite-bearing gravels means that the basanite cobbles have likely been reworked several times before final deposition.

Published
2024
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11. AusGeochem Data Platform: Easily Visualise and Synthesise Public Data for Exploration

Author

Ware, Bryant, Kohlmann, Fabian, Boone, Samuel, Dalton, Hayden, Halimulati Ananuer, McInnes, Brent, Greau, Yoann, Prent, Alexander, Gleadow, Andrew, and Kohn, Barry

Subjects
data-driven exploration, FAIR data, data repository, geochemical data platform
Abstract

The AusGeochem data platform has been built by the AuScope Geochemistry Network (AGN) and Lithodat Pty Ltd to facilitate the sharing of data produced by geochemistry laboratories in Australian universities. AusGeochem provides users with access to a geochemistry data repository augmented with data visualisation and analytics capability. Our vision is to make the platform fully collaborative across the industry-academic-government sector and for it to become a key resource in quantitatively understanding Earth system processes, including the formation and preservation of critical mineral ores. When an industry collaborator approaches an Australian laboratory facility to obtain geochemical data, AusGeochem can be used first to search the area of interest for existing free, publicly available data. The data and sample location can then be interrogated through an array of easy to use visualisation and analytic tools that include toggling between different map layers e.g., (satellite, gravity, magnetics, geology, and contoured heat maps) and interrogating data in real time, setting up a more informed inspection of existing geochemical data and allowing users to target the best geochemical tool for their specific need. When analytical data generation is underway, users upload sample metadata to AusGeochem and laboratory staff performing the geochemical analyses can upload the finished data directly into the platform, simultaneously linking the analyses to the sample metadata. Collaborators from industry and academia can be provided secure and private access to the data to perform statistical analyses and use novel tools to visualise and synthesise data within the context of large volumes of aggregated publicly funded geochemical data, all directly within the AusGeochem platform. The development of this novel data platform kicks off a new era of structured and standardised `Big Data' analytics in exploration workflows. It enables users to interrogate intractably large geochemical datasets in new and powerful ways for exploration and developing a greater understanding of the deposits of economic interest., Open-Access Online Publication: May 31, 2023

Published
2023
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12. Developments in AusGeochem: A platform for geochemical data storage, dissemination, visualisation and analysis

Author

Dalton, Hayden, primary, Ware, Bryant, additional, Boone, Samuel, additional, Gréau, Yoann, additional, Ananuer, Halimulati, additional, Nixon, Angus, additional, Hodgekiss, Sally-Ann, additional, Kohlmann, Fabian, additional, Prent, Alexander, additional, Theile, Moritz, additional, Noble, Wayne, additional, Dux, Florian, additional, Koutamanis, Dafne, additional, Wang, Xueying, additional, Chen, Bei, additional, McMillan, Malcolm, additional, Stirling, Jack, additional, Zhou, Renjie, additional, Armistead, Sheree, additional, McInnes, Brent, additional, and Kohn, Barry, additional

Published
2023
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16. Age and Petrogenesis of Kimberlites and Related Rocks from Finland

Author

Dalton, Hayden Boyd and Dalton, Hayden Boyd

Abstract

Kimberlites are rare, small volume ultramafic igneous rocks found on every continent on Earth, with eruption ages spanning almost 3 billion years. These rocks are derived from the deepest magmas that reach Earth’s surface (>150-200 km) and provide unique insights into the nature of the convecting mantle. In addition, their cargo of entrained mantle xenocrysts (including diamonds) and xenoliths permit examination of the subcontinental lithospheric mantle (SCLM), while ‘deep’ diamonds give insights into the composition of the underlying asthenospheric mantle. Despite their significant scientific and economic importance, and decades of research, particularly in regions of southern Africa, North America and Siberia, questions remain as to the petrogenesis of kimberlites. Contention persists around the depth of origin of kimberlites, melting trigger(s) including tectonic settings, and the composition and evolution of kimberlite melts during their ascent. To provide new insights on these issues, this study presents a comprehensive petrographic, geochemical and geochronological investigation on samples from three occurrences of kimberlite and related magmatism in Finland, comprising the Lentiira-Kuhmo cluster of olivine lamproites, Kuusamo cluster of kimberlites and ultramafic lamprophyres (UMLs) and the Kaavi-Kuopio kimberlites. Finland represents an optimal location for testing various petrogenetic models, particularly regarding the links to geodynamic processes as the tectonic evolution of the Baltic Shield and its role in supercontinent cycles are well constrained. This work presents the first petrological account of the Kuusamo kimberlites, revealing that they represent highly differentiated magmas with scarce olivine macrocrysts and other mantle-derived xenocrysts. These characteristics contrast with the neighbouring Kaavi-Kuopio kimberlites, which are inferred to have crystallised from less differentiated magmas that were modified by mantle assimilation, as evidence

Published
2022

17. The AuScope Geochemistry Network: Facilitating Better Organisation, Coordination and Ability to Share Data Produced by Australian Geochemistry Laboratories

Author

Ware, Bryant, primary, Prent, Alexander, additional, Boone, Samual, additional, Dalton, Hayden, additional, Florin, Guillaume, additional, Greau, Yoann, additional, Kohlmann, Fabian, additional, Theile, Moritz, additional, Noble, Wayne, additional, Matchan, Erin, additional, Kohn, Barry, additional, Gleadow, Andrew, additional, and McInnes, Brent, additional

Published
2022
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18. AusGeochem: an Australian AuScope Geochemistry Network data platform for laboratories and their users

Author

Prent, Alexander M., primary, Boone, Samuel C., additional, Dalton, Hayden, additional, Gréau, Yoann, additional, Florin, Guillaume, additional, Kohlmann, Fabian, additional, Theile, Moritz, additional, Noble, Wayne, additional, Hodgekiss, Sally-Ann, additional, Ware, Bryant, additional, Philips, David, additional, Kohn, Barry, additional, O’Reilly, Suzanne, additional, Gleadow, Andrew, additional, McInnes, Brent, additional, and Rawling, Tim, additional

Published
2022
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20. AusGeochem: An Open Platform for Geochemical Data Preservation, Dissemination and Synthesis

Author

Boone, Samuel C., primary, Dalton, Hayden, additional, Prent, Alexander, additional, Kohlmann, Fabian, additional, Theile, Moritz, additional, Gréau, Yoann, additional, Florin, Guillaume, additional, Noble, Wayne, additional, Hodgekiss, Sally‐Ann, additional, Ware, Bryant, additional, Phillips, David, additional, Kohn, Barry, additional, O’Reilly, Suzanne, additional, Gleadow, Andrew, additional, McInnes, Brent, additional, and Rawling, Tim, additional

Published
2022
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21. Opening the full Potential of Geochemical Big Data utilising AusGeochem

Author

Noble, Wayne, primary, Kohn, Barry, additional, Boone, Samuel, additional, Kohlmann, Fabian, additional, Greau, Yoann, additional, Dalton, Hayden, additional, Ware, Bryant, additional, Prent, Alexander, additional, Beucher, Romain, additional, McMillan, Malcolm, additional, McInnes, Brent, additional, Bedoya Mejia, Alejandra, additional, and Theile, Moritz, additional

Published
2022
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22. The AuScope Geochemistry Laboratory Network Project and the Building of the AusGeochem Data Repository

Author

McInnes, Brent, primary, Gleadow, Andrew, additional, O'Reilly, Suzanne, additional, Kohn, Barry, additional, Rawling, Tim, additional, Kohlmann, Fabian, additional, Phillips, David, additional, Prent, Alexander, additional, Boone, Samuel, additional, Greau, Yoann, additional, Theile, Moritz, additional, Ware, Bryant, additional, Noble, Wayne, additional, Dalton, Hayden, additional, Hodgekiss, Sally-Ann, additional, Ananuer, Halimulati, additional, and Alard, Olivier, additional

Published
2022
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23. A Digital end-to-end solution for FAIR Geochemistry Data, from Field Collection to Publication

Author

Kohlmann, Fabian, primary, Noble, Wayne, additional, Boone, Samuel, additional, Greau, Yoann, additional, Dalton, Hayden, additional, Ware, Bryant, additional, Beucher, Romain, additional, McMillan, Malcolm, additional, Kohn, Barry, additional, Prent, Alexander, additional, McInnes, Brent, additional, Bedoya Mejia, Alejandra, additional, and Theile, Moritz, additional

Published
2022
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25. The AuScope Geochemistry Network and the AusGeochem geochemistry data platform

Author

Prent, Alexander, primary, Dalton, Hayden, additional, Boone, Samuel, additional, Florin, Guillaume, additional, Greau, Yoann, additional, McInnes, Brent, additional, Gleadow, Andrew, additional, O'Reilly, Suzanne, additional, Kohn, Barry, additional, Matchan, Erin, additional, Alard, Olivier, additional, Rawling, Tim, additional, Kohlmann, Fabian, additional, Theile, Moritz, additional, and Noble, Wayne, additional

Published
2021
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26. Kimberlite genesis from a common carbonate-rich primary melt modified by lithospheric mantle assimilation

Author

Giuliani, Andrea, Pearson, D. Graham, Soltys, Ashton, Dalton, Hayden, Phillips, David, Foley, Stephen F., Lim, Emilie, Goemann, Karsten, Griffin, William L., and Mitchell, Roger H.

Abstract

Quantifying the compositional evolution of mantle-derived melts from source to surface is fundamental for constraining the nature of primary melts and deep Earth composition. Despite abundant evidence for interaction between carbonate-rich melts, including diamondiferous kimberlites, and mantle wall rocks en route to surface, the effects of this interaction on melt compositions are poorly constrained. Here, we demonstrate a robust linear correlation between the Mg/Si ratios of kimberlites and their entrained mantle components and between Mg/Fe ratios of mantle-derived olivine cores and magmatic olivine rims in kimberlites worldwide. Combined with numerical modeling, these findings indicate that kimberlite melts with highly variable composition were broadly similar before lithosphere assimilation. This implies that kimberlites worldwide originated by partial melting of compositionally similar convective mantle sources under comparable physical conditions. We conclude that mantle assimilation markedly alters the major element composition of carbonate-rich melts and is a major process in the evolution of mantle-derived magmas., Science Advances, 6 (17), ISSN:2375-2548

Published
2020

29. pyrolite: Python for geochemistry

Author

Williams, Morgan, primary, Schoneveld, Louise, additional, Mao, Yajing, additional, Klump, Jens, additional, Gosses, Justin, additional, Dalton, Hayden, additional, Bath, Adam, additional, and Barnes, Steve, additional

Published
2020
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35. Perturbation of the deep-Earth carbon cycle in response to the Cambrian Explosion.

Author

Giuliani A, Drysdale RN, Woodhead JD, Planavsky NJ, Phillips D, Hergt J, Griffin WL, Oesch S, Dalton H, and Davies GR

Abstract

Earth's carbon cycle is strongly influenced by subduction of sedimentary material into the mantle. The composition of the sedimentary subduction flux has changed considerably over Earth's history, but the impact of these changes on the mantle carbon cycle is unclear. Here, we show that the carbon isotopes of kimberlite magmas record a fundamental change in their deep-mantle source compositions during the Phanerozoic Eon. The 13 C/ 12 C of kimberlites before ~250 Ma preserves typical mantle values, whereas younger kimberlites exhibit lower and more variable ratios-a switch coincident with a recognized surge in kimberlite magmatism. We attribute these changes to increased deep subduction of organic carbon with low 13 C/ 12 C following the Cambrian Explosion when organic carbon deposition in marine sediments increased significantly. These observations demonstrate that biogeochemical processes at Earth's surface have a profound influence on the deep mantle, revealing an integral link between the deep and shallow carbon cycles.

Published
2022
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36. Kimberlite genesis from a common carbonate-rich primary melt modified by lithospheric mantle assimilation.

Author

Giuliani A, Pearson DG, Soltys A, Dalton H, Phillips D, Foley SF, Lim E, Goemann K, Griffin WL, and Mitchell RH

Abstract

Quantifying the compositional evolution of mantle-derived melts from source to surface is fundamental for constraining the nature of primary melts and deep Earth composition. Despite abundant evidence for interaction between carbonate-rich melts, including diamondiferous kimberlites, and mantle wall rocks en route to surface, the effects of this interaction on melt compositions are poorly constrained. Here, we demonstrate a robust linear correlation between the Mg/Si ratios of kimberlites and their entrained mantle components and between Mg/Fe ratios of mantle-derived olivine cores and magmatic olivine rims in kimberlites worldwide. Combined with numerical modeling, these findings indicate that kimberlite melts with highly variable composition were broadly similar before lithosphere assimilation. This implies that kimberlites worldwide originated by partial melting of compositionally similar convective mantle sources under comparable physical conditions. We conclude that mantle assimilation markedly alters the major element composition of carbonate-rich melts and is a major process in the evolution of mantle-derived magmas., (Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).)

Published
2020
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