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critical zone

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Journal Article
Published: 01 February 2015
Geochemistry: Exploration, Environment, Analysis (2015) 15 (1): 39-53.
... mineralization within a gabbroic rock body was discovered. This paper reports the results of our study. However, the topographic slope of the ν 1 intrusive body tilts towards the NW, and thus the most anomalous soil Pt and Pd concentrations may be somewhat transferred from the contact zone along...
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Journal Article
Published: 01 August 2011
Vadose Zone Journal (2011) 10 (3): 884-899.
... of the critical zone (CZ) is a result of tectonic, lithogenic, and climatic forcings that shape the landscape across geologic time scales. The CZ structure can be probed to measure contemporary rates of regolith production and hillslope evolution, and its fluids and solids can be sampled to determine how...
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Journal Article
Published: 01 August 2002
Vadose Zone Journal (2002) 1 (1): 197-198.
... for implementation. For the mid term, the Roadmap outcomes of greatest significance are likely to be the cumulative advances in monitoring systems for contaminated vadose zone sites. A sound and efficient monitoring program is critical at major sites during environmental cleanup and afterward, throughout any...
Journal Article
Journal: Elements
Published: 01 October 2007
Elements (2007) 3 (5): 321-326.
...Jon Chorover; Ruben Kretzschmar; Ferran Garcia-Pichel; Donald L. Sparks Abstract Many processes that affect soil and water quality occur at the water-wetted interface of weathering products such as clays, oxides, and organic matter. Especially near the sunlit surface of the Critical Zone...
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Journal Article
Published: 07 May 2019
South African Journal of Geology (2019)
...A.A. Mitchell; J. Henckel; A. Mason-Apps Abstract The Upper Critical Zone of the Rustenburg Layered Suite (RLS) in the Swartklip Sector, north-western Bushveld Complex, is considerably attenuated relative to other parts of the Complex. The interval between the UG2 chromitite and the Merensky Reef...
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Journal Article
Published: 01 May 2019
South African Journal of Geology (2019)
...A.A. Mitchell; R.N. Scoon; M.R. Sharpe Abstract In the Bushveld Complex, the ultramafic (orthopyroxenite/harzburgite with chromitite) layers that host most of the PGE and chromite mineralization in the Upper Critical Zone display well-documented discordant basal contacts with their anorthositic...
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Journal Article
Published: 25 July 2017
Geochemistry: Exploration, Environment, Analysis (2017) 18 (1): 47-57.
... and the associated irrigation water have significant effects on the spatial distribution of the three metals in the critical zone (CZ). Iron exhibited greater transfer ability than manganese and lead, however it was mainly concentrated in the roots and sheath of the maize, rather than the seeds. The human health...
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Journal Article
Published: 01 October 2016
Clays and Clay Minerals (2016) 64 (5): 677-694.
... the rate of pedogenesis on a global scale. Since that time, soil has become a key component of the biosphere and has given rise to profound development of the Earth’s Critical Zone (CZ). Case studies of Devonian CZs have helped to record the transformation from Precambrian–Lower Paleozoic ‘proto- CZs...
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Journal Article
Published: 01 October 2016
Clays and Clay Minerals (2016) 64 (5): 586-587.
...Paul Schroeder The direction of critical zone clay research is exemplified in topics presented at the EuroClay session and in this thematic group of papers in Clays and Clay Minerals . Clay minerals serve to proxy information about the deep time history of Earth and give us insight as to how...
Journal Article
Published: 01 September 2016
Vadose Zone Journal (2016) 15 (9): vzj2016.06.0050.
...Li Guo; Henry Lin Abstract The Critical Zone (CZ) is the thin layer of the Earth’s terrestrial surface and near-surface environment that ranges from the top of the vegetation canopy to the bottom of the weathering zone and plays fundamental roles in sustaining life and humanity. The past few years...
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Series: GSA Special Papers
Published: 01 January 2016
DOI: 10.1130/2015.2516(09)
... Karst landscapes provide unique challenges and opportunities to studies of processes within the critical zone, which spans from the top of the canopy to the base of active groundwater circulation. Dimensional analysis using the characteristic length scales and time scales of karst processes...
Journal Article
Published: 01 November 2015
Vadose Zone Journal (2015) 14 (11): vzj2014.07.0102.
...Craig Rasmussen; Jon D. Pelletier; Peter A. Troch; Tyson L. Swetnam; Jon Chorover Abstract Critical zone evolution, structure, and function are driven by energy and mass fluxes into and through the terrestrial subsurface. We have developed an approach to quantifying the effective energy and mass...
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Journal Article
Published: 01 July 2015
Vadose Zone Journal (2015) 14 (7): vzj2014.11.0167.
..., and these sites were different from the representative sites of the catchment mean θ. The results of this study have implications for upscaling soil water from point-based observations to hillslope and catchment scales. This study was conducted at the Shale Hills Critical Zone Observatory, which is a 7.9-ha...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 2015
GSA Bulletin (2015) 127 (5-6): 862-878.
... Critical Zone Observatory (CZO), Colorado, USA. Our data reveal that two-thirds of in situ 10 Be in regolith is produced within saprolite, and at least one-tenth of the meteoric 10 Be inventories is stored in saprolite, highlighting the importance of consistent terminology and identification of the mobile...
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