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regolith

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Journal Article
Journal: Economic Geology
Published: 01 June 2021
Economic Geology (2021) 116 (4): 837–861.
... of an indurated chalcedony-rich layer sporadically occurring on hilltops. The silcrete also occurs as more irregular, discontinuous, and thinner intervals across the regolith units. Mineralogical and petrographic characterization was carried out on 29 samples of the regolith profile collected from selected...
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Journal Article
Journal: GSA Bulletin
Published: 15 January 2021
GSA Bulletin (2021) 133 (9-10): 1930–1946.
...Matan Ben-Asher; Itai Haviv; Onn Crouvi; Joshua J. Roering; Ari Matmon Abstract Carbonate hillslopes are often soil mantled and display a classic convex morphology. In this study we examine controls on carbonate hillslope denudation and morphology using a modified regolith mass balance equation...
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Journal Article
Journal: Elements
Published: 01 October 2020
Elements (2020) 16 (5): 331–336.
... and protracted, in the case of solar irradiation of rocks residing in regoliths for millions to billions of years. Noble gas thermochronology applied to meteorites and extraterrestrial materials returned by space missions enables us to decipher the histories of these materials and thereby understand fundamental...
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Journal Article
Journal: Economic Geology
Published: 01 August 2020
Economic Geology (2020) 115 (5): 1097–1118.
...Martin Yan Hei Li; Mei-Fu Zhou; Anthony E. Williams-Jones Abstract Subtropical weathering of granitic catchments in South China has led to the formation of numerous giant regolith-hosted rare earth element (REE) deposits that currently account for more than 15% of global REE production and more...
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Journal Article
Journal: Geophysics
Published: 14 July 2020
Geophysics (2020) 85 (5): E153–E162.
... are found to enhance interpretation of the regolith geology, particularly the nature and distribution of transported materials that are not afforded by mapping conductivity/conductance alone. 20 6 2019 28 4 2020 2 5 2020 2020 Society of Exploration Geophysicists electromagnetics...
Journal Article
Journal: Geology
Published: 29 April 2020
Geology (2020) 48 (7): 723–727.
... of the differentiated melt is norite, pyroxenite, and dunite ( Hurwitz and Kring, 2014 ; Vaughan and Head, 2014 ). The spectrum of Qi Yuan shows more prominent 1 μm and 2 μm spectral features (Fig. S1A in the Supplemental Material 1 ) than those of the regolith ( Fig. 4A ), but all of the VNIS-obtained...
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Journal Article
Published: 01 January 2020
American Mineralogist (2020) 105 (1): 1–2.
... of REE from bedrock sources (granite and sedimentary rocks) and their precipitation as secondary REE-phases and/or REE as ion-sorbed has been described recently in the Piedmont regolith and in mined kaolin beds in the Georgia Coastal Plain (e.g., Bern et al. 2017 ; Cheshire et al. 2018...
Journal Article
Published: 01 January 2020
American Mineralogist (2020) 105 (1): 92–108.
...Martin Yan Hei Li; Mei-Fu Zhou Abstract Rare earth elements (REEs) have become increasingly important to our modern society due to their strategical significance and numerous high technological applications. Regolith-hosted heavy rare earth element (HREE) deposits in South China are currently...
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Journal Article
Published: 01 November 2019
Russ. Geol. Geophys. (2019) 60 (11): 1300–1309.
..., mineralogical and physical properties of lunar regolith and have been widely used in lunar geological explorations ( Lucey et al., 2006 ). Many models have been suggested to quantify Fe and/or Ti abundances from Clementine’s UV/VIS images ( Lucey et al., 1995 , 1998 , 2000 ; Blewett et al., 1997 ; Lawrence...
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Journal Article
Published: 01 September 2019
Reviews in Mineralogy and Geochemistry (2019) 85 (1): 349–380.
...Kate Maher; Alexis Navarre-Sitchler kmaher@stanford.edu asitchle@mines.edu Copyright © 2019 by the Mineralogical Society of America 2019 Mineralogical Society of America Chemical weathering, or the breakdown of rock to form regolith, occurs within an interface between...
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Journal Article
Published: 21 August 2019
Geochemistry: Exploration, Environment, Analysis (2020) 20 (3): 280–298.
...Paul A. Morris; Alex Christ; Edward J. Mikucki Abstract The <10, <4, <2.5 and <1 µm fractions of eight regolith samples have been extracted as aerosols, then analysed for more than 60 elements by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Precision...
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Journal Article
Published: 16 August 2019
Geochemistry: Exploration, Environment, Analysis (2020) 20 (1): 129–154.
... to the abundance of transported regolith dominated by quartz-rich sand. The archived samples were specifically selected soils (sheetwash or sandplain) with a component of Quaternary–Tertiary transported cover. Results at the orientation test sites (Telfer West, Tooting Bec and DeGrussa) were promising. Importantly...
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Journal Article
Published: 16 August 2019
Geochemistry: Exploration, Environment, Analysis (2020) 20 (1): 113–128.
... workflow called UltraFine+™. This workflow provides 40 elements, spectral mineralogy, particle-size distribution, pH, electrical conductivity (EC) and specific surface area, offering more quality data to improve mineral exploration using soil and regolith samples. Supplementary material: Spreadsheets...
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Journal Article
Journal: Elements
Published: 01 August 2019
Elements (2019) 15 (4): 259–265.
... to the development of thick regolith cover, effectively isolating bedrock and drastically lowering weathering rates. Different lithologies have sufficiently different reactivities such that bedrock heterogeneity might mask any climatic influence over weathering. Biological processes dominate the production...
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Journal Article
Journal: Elements
Published: 01 August 2019
Elements (2019) 15 (4): 286–287.
... collected 382 kg of rock, regolith, and core samples from six geologically diverse locations on the Moon ( F ig . 1 ). Because of the dexterity, adaptability, and real-time decision-making ability that astronauts provide, the Apollo samples span an incredible range of sample types, including the following...
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Journal Article
Journal: Elements
Published: 01 August 2019
Elements (2019) 15 (4): 247–252.
...Suzanne P. Anderson The vast diversity of landscapes found on Earth results from interplay between processes that break rock down, produce mobile regolith, and transport materials away. Mechanical weathering is fundamental to shaping landscapes, yet it is perhaps less understood at a mechanistic...
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Journal Article
Published: 12 July 2019
Geochemistry: Exploration, Environment, Analysis (2020) 20 (2): 217–232.
...E. C. Grunsky; P. de Caritat Abstract Multi-element geochemical surveys of rocks, soils, stream/lake/floodplain sediments and regolith are typically carried out at continental, regional and local scales. The chemistry of these materials is defined by their primary mineral assemblages...
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Journal Article
Published: 03 July 2019
Geochemistry: Exploration, Environment, Analysis (2020) 20 (1): 35–49.
...Paul Morris Abstract Regolith and vegetation (spinifex) chemistry from transects across the Stansmore Fault in the Ngururrpa area of northeastern Western Australia have been used to detect the presence of fault-controlled fluid, and whether the fluid has been in contact with concealed...
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Journal Article
Published: 24 May 2019
Geochemistry: Exploration, Environment, Analysis (2019) 19 (4): 474–486.
... through overlying gravels. Regolith mapping using high-resolution drone imagery and digital elevation modelling identified geomorphic markers of faulting which aided mapping the distribution of saline pockets. Saline pockets provide a unique opportunity to sample the direct expression of transported...
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Journal Article
Journal: Economic Geology
Published: 01 May 2019
Economic Geology (2019) 114 (3): 541–568.
...Martin Yan Hei Li; Mei-Fu Zhou; Anthony E. Williams-Jones Abstract The Zudong heavy rare earth element (HREE) deposit in South China is the largest regolith-hosted HREE deposit in the world, with a resource of ~17,600 tonnes (t) of rare earth oxides (REOs) at an average grade of ~0.1 wt % REOs...
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