1-20 OF 57 RESULTS FOR

pimelite

Results shown limited to content with bounding coordinates.
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
Published: 01 April 1983
Clays and Clay Minerals (1983) 31 (2): 143–151.
Journal Article
Published: 01 June 1979
American Mineralogist (1979) 64 (5-6): 615–625.
...G. W. Brindley; D. L. Bish; H. M. Wan Abstract The term kerolite-pimelite series is used for a series of hydrous magnesium-nickel silicates with talc-like structure and composition but with additional water and with a highly disordered and non-swelling stacking of the layers. The layer spacing...
Journal Article
Published: 01 April 1966
American Mineralogist (1966) 51 (3-4_Part_1): 279–298.
...George T. Faust Abstract The hydrous nickel-magnesium silicates are one of the most poorly understood mineral groups. A principal member of this group was originally described by Professor Martin H. Klaproth in 1788 as “grüner Chrysopraserde”. He found this clay mineral, now called pimelite...
Image
Type IV (kerolite-<b>pimelite</b>) as seen under the TEM (specimen LC-100B). ( a )...
Published: 01 June 2016
Figure 5 Type IV (kerolite-pimelite) as seen under the TEM (specimen LC-100B). ( a ) Image of the sample, the specimen was detached from the area in the red rectangle. ( b ) Detail of the hole in the grid under the optical microscope (plane-polarized light). ( c ) Low-magnification images
Journal Article
Published: 01 April 2009
European Journal of Mineralogy (2009) 21 (2): 467–483.
...) and electron-microprobe analyses. These conspicuously, green-coloured phases occur either as sub-mm to cm-sized veins or as macroscopic (sub-cm sized) “booklets”. Veins comprised ~ 10 Å (2:1) talc-like minerals identified as species of the Ni-kerolite/pimelite Ni for Mg solid solution series, with Ni contents...
FIGURES | View All (13)
Journal Article
Journal: Economic Geology
Published: 01 September 2004
Economic Geology (2004) 99 (6): 1197–1213.
... fault- and joint-related silicate veins, sometimes in stockworks, in the lower part of the sequence. These veins contain the distinctive green mineral known as "garnierite" (actually pimelite, a form of nickeliferous talc) as well as quartz and chalcedony, and they can have a Ni content of up to 30...
FIGURES | View All (14)
Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 945–962.
...) minerals to the sequential leaching of Mg and Fe, together with their local replacement by Ni in octahedral sites of the newly formed TL minerals. The TL minerals are thus considered as the main Ni-bearing phases (pimelite) of the ore. The large-scale redistribution of Mg and Ni during a first period...
FIGURES | View All (11)
Journal Article
Published: 01 June 2016
American Mineralogist (2016) 101 (6): 1460–1473.
...Figure 5 Type IV (kerolite-pimelite) as seen under the TEM (specimen LC-100B). ( a ) Image of the sample, the specimen was detached from the area in the red rectangle. ( b ) Detail of the hole in the grid under the optical microscope (plane-polarized light). ( c ) Low-magnification images...
FIGURES | View All (9)
Journal Article
Published: 01 April 2012
Clays and Clay Minerals (2012) 60 (2): 121–135.
..., kerolite-pimelite, and sepiolite-falcondoite, without or with very small amounts of Al in their composition. The present study deals with garnierites which are essentially Al-free. The published experimental dissolution constants for Mg end-members of the above solid solutions and the calculated constants...
FIGURES | View All (9)
Journal Article
Published: 01 October 2001
American Mineralogist (2001) 86 (10): 1143–1150.
..., or massive magnetite with subordinate amounts of apatite. Apatite may also be accompanied by silicate minerals, mainly chlorite and lesser amounts of serpentine, tremolite, and Ni-silicates (nepouite, pimelite), and by Ni-sulfides (pentlandite, violarite, heazlewoodite). The apatite-magnetite association...
FIGURES | View All (5)
Journal Article
Journal: Economic Geology
Published: 01 August 1990
Economic Geology (1990) 85 (5): 1010–1023.
... and serpentinization of the pyroxenite and the location of the pyroxenite with respect to neighboring dunite. Within the Jacuba profile, smectite and pimelite pseudomorphs after pyroxene are especially Ni rich, and in fact, are the most Ni-enriched clay minerals now known in lateritic weathering profiles. GeoRef...
Journal Article
Published: 01 June 1985
American Mineralogist (1985) 70 (5-6): 549–558.
...Alain Manceau; Georges Calas Abstract Four nickel-bearing clay minerals from New-Caledonia belonging to the lizardite–nepouite and the kerolite–pimelite series have been investigated in order to study the mechanisms of Ni–Mg substitution. Local order around Ni was determined by optical absorption...
Image
Lippmann diagrams for solid solutions: (a) serpentine-népouite, (b) kerolit...
Published: 01 April 2012
Figure 2. Lippmann diagrams for solid solutions: (a) serpentine-népouite, (b) kerolite-pimelite, and (c) sepiolite-falcondoite. Diagrams show solidus, minimum stoichiometric saturation (MSS), and solutus curves (continuous lines). Dotted curves give the log ∑Π values corresponding to the two
Image
Triangular diagram comparing AEM (circles, squares, and triangles) with pre...
Published: 01 June 2016
Figure 7 Triangular diagram comparing AEM (circles, squares, and triangles) with previous EMP (fields). Compositional fields from Villanova-de-Benavent et al. (2014a) . Abbreviations from Whitney and Evans (2010) except falcondoite (Fal), kerolite (Ker), pimelite (Pim), and pecoraite (Pec
Image
F ig  9. Microprobe analyses of aluminosilicate phases in the peridotite, s...
Published: 01 September 2004
F ig 9. Microprobe analyses of aluminosilicate phases in the peridotite, saprolitized peridotite, and green saprolite. On the basis of this diagram four major Ni-bearing phases are identified: pimelite, sepiolite, nimite, and Ni smectites. All phases show variable substitution of Mg by Ni (see
Image
F ig  6. A. Photomicrographs of the peridotite from pit 1 showing serpentin...
Published: 01 September 2004
photomicrographs of the quartz (Qtz.)-pimelite (Pim.) veins found in the saprolitized peridotite in pit 1. E and F. Element map for Mg and Ni respectively carried out on a typical stockwork silicate vein. The major Ni-bearing phases are pimelite (Pim.) and Ni smectite. These maps clearly show the antipathetic
Image
Projection of Caribbean garnierite ore compositions ( Proenza  et al. , 200...
Published: 01 April 2012
et al. , 1985 ) for garnierites from different Ni-laterite deposits, in a Si–Ni–Mg ternary diagram (at.%). The positions of the solid-solution series between Ni-sepiolite (Sep)-falcondoite (Fal), kerolite (Ker)-pimelite (Pim), and lizardite (Srp)-népouite (Nep) are also indicated.
Image
Replacement model that may explain the formation of Ni-enriched talc-like (...
Published: 01 June 2016
Figure 9 Replacement model that may explain the formation of Ni-enriched talc-like (“kerolite”-“pimelite”) lamellae from the alteration of Ni-poor serpentine particles (1a–3a) and HRTEM images representative of each precipitation stage (1b–3b): early formation of polygonal serpentine
Image
F ig  5. A. Lateritic profile in pit 1. The deposit shows the typical red l...
Published: 01 September 2004
" in these veins is the mineral pimelite. C. The green saprolite is the main ore horizon in Cerro Matoso. In this picture the green saprolite is altered locally to red laterite. D. One of the "tachylites" from pit 1. This unit is fine grained, dark, and here has a vitreous appearance. It also contains multiple
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1952
AAPG Bulletin (1952) 36 (5): 884–886.
... bentonite ( Knight, 1898 ). Engelmann’s citations of bole and pimelite for comparison seem appropriate enough, in view of the stage of development of mineralogic thought in his time. In the contemporary edition of Dana’s System of Mineralogy (1854, pp. 252, 503) bole is defined as material closely...