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talc

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Journal Article
Published: 19 May 2021
Geochemistry: Exploration, Environment, Analysis (2021) 21 (2): geochem2020-065.
... O 3 , Ni/Cr v. Ni/Ti, and MgO v. Cr. (6) Identify and quantify talc alteration and serpentinization. This included the use of a new alteration plot (Mg# v. 1410 nm RAD /Albedo) to estimate serpentinization and identify relationships between serpentine, carbonate, chlorite and talc abundances...
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Journal Article
Journal: Geosphere
Published: 23 December 2020
Geosphere (2021) 17 (1): 306–321.
... a small Jurassic(?) pluton, the following mineral zones occur: periclase (hydrated to brucite), forsterite (variably hydrated to serpentine and typically accompanied by clinohumite), tremolite, and talc. Airborne Vis-NIR imaging spectrometer data with 5 m ground resolution shows serpentine and tremolite...
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Journal Article
Published: 01 October 2020
American Mineralogist (2020) 105 (10): 1536–1546.
... of fine-grained and poorly ordered 1:1 and 2:1 layer silicates, commonly referred to as non-expandable serpentine-like (SL) and talc-like (TL) minerals. New data on the swelling and shrinking capacity of these layer silicates were gathered from X-ray diffraction (XRD) after saturation of the clay...
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Journal Article
Published: 01 June 2020
American Mineralogist (2020) 105 (6): 873–893.
...Takayoshi Nagaya; Atsushi Okamoto; Ryosuke Oyanagi; Yusuke Seto; Akira Miyake; Masaoki Uno; Jun Muto; Simon R. Wallis Abstract Talc is widely distributed over the Earth's surface and is predicted to be formed in various tectonic settings. Talc is a very soft and anisotropic sheet silicate showing...
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Journal Article
Published: 20 February 2020
Environmental and Engineering Geoscience (2020) 26 (1): 21–28.
... serpentinites, various greenstones, amphibolites, blueschist, and other schists (talc-tremolite, actinolite, etc.). These rocks are a legacy of tectonic activity that occurred on the west coast margin of the North American plate ∼65–150 MY ago during subduction of the East Pacific and Farallon plates...
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Journal Article
Published: 20 February 2020
Environmental and Engineering Geoscience (2020) 26 (1): 9–14.
.... Van Gosen, B. S.; Lowers, H. A.; and Sutley, S. J. , 2004 , A USGS Study of Talc Deposits and Associated Amphibole Asbestos within Mined Deposits of the Southern Death Valley Region, California...
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Journal Article
Published: 11 December 2019
Bulletin de la Société Géologique de France (2019) 190 (1): 14.
... of serpentinized lherzolites tectonic lenses separated by anastomosed shear zones is capped by a thin upper damage zone made up of strongly sheared talc-chlorite schists invaded by pyrite crystallization. The cover décollement is a few decameter-thick fault zone resulting from the brecciation of Upper Triassic...
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Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 945–962.
... activities associated with the dislocation and early alteration of the ophiolite nappe. They result from two kinds of Ni-ore-forming processes and reveal a significant decrease in the mobility of Ni over time. The first process relates the step-by-step alteration of serpentine species into talc-like (TL...
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Journal Article
Published: 01 October 2018
Mineralogical Magazine (2018) 82 (5): 1187–1210.
...Marie-Lola Pascal; Michel Fonteilles; Véronique Tournis; Benoît Baptiste; Jean-Louis Robert; Jean-Claude Boulliard ABSTRACT Ba-rich and Si-rich phlogopites occur in the talc-bearing rocks of the La Creuse sulfide ore deposit in Beaujolais, France. They form a group of compositions completely...
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Journal Article
Published: 01 June 2018
American Mineralogist (2018) 103 (6): 989–992.
... + 7 talc → 3 eckermannite + 3 pyrope + 13 coesite + 4 H 2 O, above the stability limit of glaucophane that is defined by the reaction glaucophane → 2 jadeite + talc. 20 11 2017 28 2 2018 Copyright © 2018 by the Mineralogical Society of America 2018 Mineralogical Society of America...
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Journal Article
Journal: Geology
Published: 04 January 2018
Geology (2018) 46 (3): 223–226.
.... The differential thermogravimetry (DTG) trough temperature varied from 794 ± 4 °C at the sliding interface to ∼720 °C below 10 mm. We inferred that DTG trough changes reflected the substrate thermal history due to landslide frictional heating. X-ray diffraction (XRD) analysis showed thermal decomposition of talc...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP435.1
EISBN: 9781786202901
... Abstract: The lacustrine carbonate reservoirs of the South Atlantic host significant accumulations of chemically reactive and Al-free Mg-silicate minerals (e.g. stevensite, kerolite and talc). Petrographic data from units such as the Cretaceous Barra Velha Formation in the Santos Basin suggest...
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Series: Clay Minerals Society
Published: 01 January 2018
DOI: 10.1346/CMS-WLS-22.2
EISBN: 9781881208495
..., dickite, and nacrite, with formula unit Al 2 Si 2 O 5 (OH) 4 ; Halloysite (planar) with formula unit Al 2 Si 2 O 5 (OH) 4 · n H 2 O       Di, trioctahedral Odinite (Fe 3+ ,Mg,Al,Fe 2+ ) 2.5 (Si,Al) 2 O 5 (OH) 4 2:1 None ( x ≈ 0) Pyrophyllite-Talc Trioctahedral Talc Mg 3 Si 4 O 10 (OH) 2...
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Journal Article
Published: 09 June 2017
European Journal of Mineralogy (2017) 29 (5): 807–819.
... Diggings peridotites indicate the complexity of mantle fluids around the RGR. During ascent of the xenoliths within a basaltic lava, post-entrapment reactions produced magnesite and quartz in Type-1 FIs and magnesite and talc in Type-2 FIs as reaction products of the fluid and its host mineral...
FIGURES
Journal Article
Published: 01 January 2017
The Canadian Mineralogist (2017) 55 (1): 101–113.
...Ryan J. Kerrigan; Philip A. Candela; Philip M. Piccoli; Mark Frank; Ann Wylie Abstract Many talc deposits are formed by metasomatism of dolostone or ultramafic rocks during metamorphism or hydrothermal alteration. In these deposits, talc commonly exhibits a platy habit; rarely, it forms fibers...
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Journal Article
Published: 01 December 2016
South African Journal of Geology (2016) 119 (4): 639–654.
... to an assemblage comprising quartz, chlorite, carbonate, talc, biotite, and, locally, plagioclase, K-feldspar, muscovite, amphibole, stilpnomelane and ankerite. The overlying sediments are made up of banded iron formations and rare beds of siliciclastic rocks. Though the altered komatiites are pervasively...
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Journal Article
Published: 01 July 2016
American Mineralogist (2016) 101 (7): 1668–1678.
...Chengxiang Li; Rucheng Wang; Huifang Xu; Xiancai Lu; Hiromi Konishi; Kun He Abstract Large deposits of unusual black talc interstratified with dolostone layers of the late Neoproterozoic Dengying Formation were discovered in Guangfeng County, Jiangxi Province, southeastern China. The black talc ore...
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Journal Article
Published: 01 June 2016
American Mineralogist (2016) 101 (6): 1460–1473.
... from the Falcondo Ni-laterite deposit (Dominican Republic). Different types of garnierites have been recognized, usually consisting of mixtures between serpentine and talc-like phases that display a wide range of textures at the nanometer scale. In particular, chrysotile tubes, polygonal serpentine...
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Journal Article
Journal: Clay Minerals
Published: 01 March 2016
Clay Minerals (2016) 51 (1): 69–80.
...Roger Borges; Lívia Macedo Dutra; Andersson Barison; Fernando Wypych Abstract The milling process in the solid-state 2:1 clay minerals, montmorillonite and talc, which have different cation exchange capacities, is reported here. Several instrumental techniques were used to monitor systematically...
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Journal Article
Published: 01 March 2016
American Mineralogist (2016) 101 (3): 554–563.
... submarine hydrothermal origin that had been thoroughly characterized previously were investigated with near-IR reflectance spectroscopy. The clays are mixed-layer glauconite-nontronite, talc-nontronite, talc-saponite, and nontronite samples. The hydroxyl bands in the range 2.1–2.35 μm were decomposed...
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