1-20 OF 100 RESULTS FOR

alterite

Results shown limited to content with bounding coordinates.
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article

Alterite and Magnesioalterite, Two New Oxalate Minerals, from the Vermillion Cliffs, Coconino County, Arizona, USA Available to Purchase

Hexiong Yang, Ronald B. Gibbs, Stanley H. Evans, Robert T. Downs, Zak Jibrin
Published: 22 April 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (2): 353–367.
DOI: https://doi.org/10.3749/2300055
...Hexiong Yang; Ronald B. Gibbs; Stanley H. Evans; Robert T. Downs; Zak Jibrin Abstract Two new organic minerals, alterite and magnesioalterite, ideally Zn 2 Fe 3+ 4 (SO 4 ) 4 (C 2 O 4 ) 2 (OH) 4 ·17H 2 O and Mg 2 Fe 3+ 4 (SO 4 ) 4 (C 2 O 4 ) 2 (OH) 4 ·17H 2 O, respectively, were discovered...
FIGURES | View All (5)
View PDF for article title, <span class="search-highlight">Alterite</span> and Magnesioalterite, Two New Oxalate Minerals, from the Vermillion Cliffs, Coconino County, Arizona, USA
Purchase
Add to Citation Manager for <span class="search-highlight">Alterite</span> and Magnesioalterite, Two New Oxalate Minerals, from the Vermillion Cliffs, Coconino County, Arizona, USA
Journal Article

A defense of the term alterite Available to Purchase

Tjeerd H. van Andel
Published: 01 June 1958
Journal of Sedimentary Research (1958) 28 (2): 234–235.
DOI: https://doi.org/10.1306/74D707CC-2B21-11D7-8648000102C1865D
...Tjeerd H. van Andel Abstract Defends the use of the term alterite as a group classification for mineral grains of unknown composition, noting that such deeply altered grains often have diagnostic significance in heavy mineral studies. GeoRef, Copyright 2008, American Geological Institute...
View PDF for article title, A defense of the term <span class="search-highlight">alterite</span>
Purchase
Add to Citation Manager for A defense of the term <span class="search-highlight">alterite</span>
Journal Article

Use of the Term “Alterite” Available to Purchase

Dorothy Carroll
Published: 01 February 1957
American Mineralogist (1957) 42 (1-2): 110–113.
...Dorothy Carroll Abstract Some Dutch mineralogists use the term “alterite” for those mineral grains which are difficult to identify because their optical properties have been changed or altered by weathering processes. Thus, in describing the size-frequency distribution of some heavy minerals from...
View PDF for article title, Use of the Term “<span class="search-highlight">Alterite</span>”
Purchase
Add to Citation Manager for Use of the Term “<span class="search-highlight">Alterite</span>”
Journal Article

Impact of alteration corridors on karst reservoir organisation and evolution of groundwater flow path: An example from the southern border of the Larzac Causse, southern France Open Access

Céline Baral, Michel Séranne, Hubert Camus, Johan Jouves
Published: 27 March 2024
Bulletin de la Société Géologique de France (2024) 195 (1): 4.
DOI: https://doi.org/10.1051/bsgf/2023017
... corridors selectively emptied of their alterite, under the effect of a hydraulic gradient. The vertically elongated structure of alteration corridors that cross-cut the Jurassic sequence enables fluid circulation from an upper to a lower aquifer, which were initially separated by a Toarcian marly seal unit...
FIGURES | View All (13)
View PDF for article title, Impact of alteration corridors on karst reservoir organisation and evolution of groundwater flow path: An example from the southern border of the Larzac Causse, southern France
Add to Citation Manager for Impact of alteration corridors on karst reservoir organisation and evolution of groundwater flow path: An example from the southern border of the Larzac Causse, southern France
Image
The petrified wood log in which both alterite and magnesioalterite were found.

The petrified wood log in which both alterite and magnesioalterite were fou... Available to Purchase

Published: 22 April 2024
Fig. 1. The petrified wood log in which both alterite and magnesioalterite were found.
Image
A microscopic view of (a) alterite and (b) magnesioalterite crystals.

A microscopic view of (a) alterite and (b) magnesioalterite crystals. Available to Purchase

Published: 22 April 2024
Fig. 2. A microscopic view of (a) alterite and (b) magnesioalterite crystals.
Image

COMPARISON OF CRYSTALLOGRAPHIC DATA BETWEEN ALTERITE AND MAGNESIOALTERITE Available to Purchase

Published: 22 April 2024
TABLE 1. COMPARISON OF CRYSTALLOGRAPHIC DATA BETWEEN ALTERITE AND MAGNESIOALTERITE
Image

CHEMICAL COMPOSITIONS (in wt.%) FOR ALTERITE AND MAGNESIOALTERITE Available to Purchase

Published: 22 April 2024
TABLE 2. CHEMICAL COMPOSITIONS (in wt.%) FOR ALTERITE AND MAGNESIOALTERITE
Image

POWDER X-RAY DIFFRACTION DATA FOR ALTERITE Available to Purchase

Published: 22 April 2024
TABLE 3A. POWDER X-RAY DIFFRACTION DATA FOR ALTERITE
Image

ATOMIC DISPLACEMENT PARAMETERS (Å 2 ) FOR ALTERITE Available to Purchase

Published: 22 April 2024
TABLE 5A. ATOMIC DISPLACEMENT PARAMETERS (Å 2 ) FOR ALTERITE
Image

SELECTED BOND DISTANCES AND ANGLES IN ALTERITE AND MAGNESIOALTERITE Available to Purchase

Published: 22 April 2024
TABLE 6. SELECTED BOND DISTANCES AND ANGLES IN ALTERITE AND MAGNESIOALTERITE
Image

CALCULATED BOND-VALANCE SUMS FOR ALTERITE Available to Purchase

Published: 22 April 2024
TABLE 7A. CALCULATED BOND-VALANCE SUMS FOR ALTERITE
Image
The Raman spectra of alterite and magnesioalterite.

The Raman spectra of alterite and magnesioalterite. Available to Purchase

Published: 22 April 2024
Fig. 5. The Raman spectra of alterite and magnesioalterite.
Journal Article

THE TITANOMAGNETITE TO TITANOMAGHEMITE CONVERSION IN A WEATHERED BASALT PROFILE FROM SOUTHERN PARANÁ BASIN, BRAZIL Available to Purchase

Marisa T. Garcia de Oliveira, Milton L. L. Formoso, Moacir Indio da Costa, Jr, Alain Meunier
Published: 01 August 2002
Clays and Clay Minerals (2002) 50 (4): 478–493.
..., ~2–8 m deep, separated by a stone line from an underlying alterite which has two different facies – its argillaceous alterite consists of a clayey matrix with a well-developed fissure system whereas the underlying boulder alterite consists of rock cores surrounded by highly-porous cortexes of Al...
FIGURES | View All (12)
View PDF for article title, THE TITANOMAGNETITE TO TITANOMAGHEMITE CONVERSION IN A WEATHERED BASALT PROFILE FROM SOUTHERN PARANÁ BASIN, BRAZIL
Purchase
Add to Citation Manager for THE TITANOMAGNETITE TO TITANOMAGHEMITE CONVERSION IN A WEATHERED BASALT PROFILE FROM SOUTHERN PARANÁ BASIN, BRAZIL
Image
The impurities in Ti-maghemites of the alterite facies. Al2O3 and SiO2 increase and MgO decreases from the core to the cortex of boulders. MnO increases with weathering in the argillaceous alterite.

The impurities in Ti-maghemites of the alterite facies. Al 2 O 3 and SiO 2... Available to Purchase

Published: 01 August 2002
Figure 6. The impurities in Ti-maghemites of the alterite facies. Al 2 O 3 and SiO 2 increase and MgO decreases from the core to the cortex of boulders. MnO increases with weathering in the argillaceous alterite.
Image
A. Following the incision of the Vis River canyon, the hydraulic gradient and associated karstic system are flowing northward. The karstic reservoir consists of a network of ‘dissolution-collapse breccia corridors’ oriented N-S and ghost-rock associated with their residual alterite. A soft sedimentary cover lying unconformable over the carbonate allows for alluvial dynamics. B. The pocket valley initiates to the west from the Lergue River, resulting in a drop of the water table and the emergence of a karstic spring at the intersection between a corridor and the scarp. The residual alterite is rapidly evacuated and the corridor centre collapses creating caves large enough to be explored by humans. The soft covering formation is evacuated by withdrawal through the karstic system. C. Regressive erosion progresses eastward, as well as the depletion of the water table. New corridors become exposed to gravitational effects and collapse as the residual alterite is evacuated. Each karstic spring defines a pocket valley head, which propagates northwards, guided by corridors. D. In a later stage, E-W tube galleries connect isolated ghost-rock features to the corridor network. Residual alterites are evacuated by flooding/dewatering of galleries even beneath the overflow spring position during high-flow events. The combined effect of the absence of a marly seal unit and concentrated infiltration due to the St. Maurice polje allows for the development of epiphreatic speleogenesis. Regressive erosion, still propagating northward, leads to the capture of the karstic system initially flowing towards the Vis River canyon (i.e., Cochon Cave).

A. Following the incision of the Vis River canyon, the hydraulic gradient a... Open Access

Published: 27 March 2024
Fig. 13 A. Following the incision of the Vis River canyon, the hydraulic gradient and associated karstic system are flowing northward. The karstic reservoir consists of a network of ‘dissolution-collapse breccia corridors’ oriented N-S and ghost-rock associated with their residual alterite
Image
XRD patterns with principal reflections of the magnetic fraction of (a) corestone and (b) cortex of boulder alterite; from (c) saprock and (d) from argillaceous alterite. The following minerals were also identified: A (anatase) and also Q (quartz) that was added as a standard. Other reflections are related to lithogenic phases as pyroxene-augite (py).

XRD patterns with principal reflections of the magnetic fraction of (a) cor... Available to Purchase

Published: 01 August 2002
Figure 7. XRD patterns with principal reflections of the magnetic fraction of (a) corestone and (b) cortex of boulder alterite; from (c) saprock and (d) from argillaceous alterite. The following minerals were also identified: A (anatase) and also Q (quartz) that was added as a standard. Other
Image
SEM image of titanomaghemites from the cortex of a boulder alterite. Voids correspond to black areas; the gray network corresponds to the cristobalite-K-feldspar mesostasis and Si-Fe microcrystalline plasma. This plasma is composed of goethite, halloysite and smectite. The white fragments (a) correspond to very fractured maghemite presenting dissolution features.

SEM image of titanomaghemites from the cortex of a boulder alterite. Voids ... Available to Purchase

Published: 01 August 2002
Figure 3. SEM image of titanomaghemites from the cortex of a boulder alterite. Voids correspond to black areas; the gray network corresponds to the cristobalite-K-feldspar mesostasis and Si-Fe microcrystalline plasma. This plasma is composed of goethite, halloysite and smectite. The white
Journal Article

Les biefs a silex; depots periglaciaires de versant issues des alterites a silex de plateau du bassin de Paris Available to Purchase

Benoit Laignel, Florence Quesnel, Robert Meyer, Patrick Lebret
Published: 01 July 1998
Bulletin de la Société Géologique de France (1998) 169 (4): 605–612.
View PDF for article title, Les biefs a silex; depots periglaciaires de versant issues des <span class="search-highlight">alterites</span> a silex de plateau du bassin de Paris
Purchase
Add to Citation Manager for Les biefs a silex; depots periglaciaires de versant issues des <span class="search-highlight">alterites</span> a silex de plateau du bassin de Paris
Journal Article

Le système karstique de Sprimont (Belgique). Holotype d'une spéléogenèse par fantômisation Open Access

Nicolas Dupont, Yves Quinif, Caroline Dubois, Hai Cheng, Olivier Kaufmann
Published: 07 February 2018
Bulletin de la Société Géologique de France (2018) 189 (1): 1.
DOI: https://doi.org/10.1051/bsgf/2017205
... altérite résiduelle constitue la phase solide restante comprenant une partie des carbonates cinétiquement moins solubles comme la calcite sparitique et la dolomie pro parte , les insolubles comme les minéraux argileux, le quartz, et la matière organique. Cette phase solide évolue de façon isovolume lors...
FIGURES | View All (21)
View PDF for article title, Le système karstique de Sprimont (Belgique). Holotype d'une spéléogenèse par fantômisation
Add to Citation Manager for Le système karstique de Sprimont (Belgique). Holotype d'une spéléogenèse par fantômisation