Zobrazeno 1 - 10
of 359
pro vyhledávání: '"John Parnell"'
Autor:
John Parnell, Connor Brolly
Publikováno v:
Communications Earth & Environment, Vol 2, Iss 1, Pp 1-9 (2021)
High burial of organic carbon in sediments around 2 billion years ago acted to enhance crustal deformation and led to intensified mountain building both in the Paleoproterozoic and since, suggests an assessment of the timing of carbon burial and defo
Externí odkaz:
https://doaj.org/article/eda2d7b32148426bbbc252de44dff877
Autor:
John Parnell, Temitope O. Akinsanpe, Joseph G. T. Armstrong, Adrian J. Boyce, John W. Still, Stephen A. Bowden, David Clases, Raquel Gonzalez de Vega, Joerg Feldmann
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 23, Iss 12, Pp n/a-n/a (2022)
Abstract The symbiotic partnership of plants and fungi was a critical means of nutrient uptake during colonization of the terrestrial surface. The Lower Devonian Rhynie Chert shows evidence for extensive phosphorus mobilization in plant debris that w
Externí odkaz:
https://doaj.org/article/9c730048405e4bb2a381fa0896ae48d0
Autor:
Eleanor A. Heptinstall, John Parnell, Joseph G. T. Armstrong, Andrea Schito, Temitope O. Akinsanpe
Publikováno v:
Geosciences, Vol 13, Iss 5, p 151 (2023)
Copper, uranium, and rare earth element (REE) mineralisation occurs in hydrocarbon-bearing Devonian continental sandstones in southwest Orkney, Scotland. The aeolian Yesnaby Sandstone Formation and fluvial Harra Ebb Sandstone Formation were mineralis
Externí odkaz:
https://doaj.org/article/191d3e31e98a48b4b2122068f275949e
Autor:
John Parnell
Publikováno v:
GeoHealth, Vol 6, Iss 7, Pp n/a-n/a (2022)
Abstract The transition to a clean energy future may require a very substantial increase in resources of vanadium. This trend brings into focus the potential health issues related to vanadium in the environment. Most vanadium enters the Earth's crust
Externí odkaz:
https://doaj.org/article/c5a887a3f8cb45d6b7d041f67cef8807
Autor:
John Parnell, Temitope O. Akinsanpe, John W. Still, Andrea Schito, Stephen A. Bowden, David K. Muirhead, Joseph G. T. Armstrong
Publikováno v:
Minerals, Vol 13, Iss 5, p 595 (2023)
Rare earth element (REE) fluorocarbonate mineralization occurs in lacustrine shales in the Lower Devonian Rhynie chert, Aberdeenshire, UK, preserved by hot spring silicification. Mineralization follows a combination of first-cycle erosion of granite
Externí odkaz:
https://doaj.org/article/2a35805ebf804b1e88172b38f1ca6b31
Publikováno v:
Journal of Global Business Insights, Vol 7, Iss 1 (2022)
Hospitality and tourism (H&T) researchers employ structural equation modeling (SEM) and other multivariate techniques to test their models with survey data. These approaches assess relationships among constructs and model fit, but they do not highlig
Externí odkaz:
https://doaj.org/article/e697aa3c399a4d8f9cd24f72d8883be8
Publikováno v:
Geosciences, Vol 12, Iss 5, p 202 (2022)
The Paleoproterozoic schists of the Leverburgh Belt, South Harris and the Neoproterozoic carbonaceous metasediments of the Dalradian Supergroup were deposited during the two most significant periods of black shale deposition globally. Hosted within t
Externí odkaz:
https://doaj.org/article/3c11553e258745f9baa8bcdd9e123718
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-6 (2018)
Red beds contain reduction spheroids that formed underground millions of years ago and whose origin remains poorly constrained. Here the authors use uranium isotopes to identify ancient fingerprints of bacteria in these features, confirming that they
Externí odkaz:
https://doaj.org/article/c62c83a40e834ba0b7634867fe3cc70f
Publikováno v:
Minerals, Vol 10, Iss 7, p 635 (2020)
Gold grains, up to 40 μm in size and containing variable percentages of admixed platinum, have been identified in coals from the Leinster Coalfield, Castlecomer, SE Ireland, for the first time. Gold mineralisation occurs in sideritic nodules in coal
Externí odkaz:
https://doaj.org/article/370989bb133e49bcb68161ca7c869af6
Publikováno v:
PLoS ONE, Vol 11, Iss 12, p e0166276 (2016)
The 7th century ship-burial at Sutton Hoo is famous for the spectacular treasure discovered when it was first excavated in 1939. The finds include gold and garnet jewellery, silverware, coins and ceremonial armour of broad geographical provenance whi
Externí odkaz:
https://doaj.org/article/ba2121ad871f46c9b5f2151105288ce5