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Zoisite-prehnite alteration

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Journal Article
Published: 01 September 1942
American Mineralogist (1942) 27 (9): 638–645.
...Kenneth DeP. Watson Abstract Metagabbro in the vicinity of Baie Verte, Newfoundland, has been altered to an aggregate of zoisite and prehnite. Microscopic study shows zoisite intimately penetrated by a network of prehnite veinlets. Chemical analyses indicate a large increase in lime and decrease...
Journal Article
Journal: Economic Geology
Published: 01 November 2009
Economic Geology (2009) 104 (7): 961–995.
... mechanism in the Sch II and sulfide deposition during the first substage of the retrograde alteration of the skarn. The second substage is characterized by the formation of clinozoisite, prehnite, quartz, calcite, chlorite, white mica, zeolite, and mineral phases belonging to the Bi-Te-Ag-S-Au system...
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Journal Article
Published: 01 August 1974
American Mineralogist (1974) 59 (7-8): 729–762.
... numerous minerals or mineral assemblages which are excellent indicators of fluid composition during metamorphism. For example, grossularite, zoisite, margarite, prehnite, lawsonite, brucite, and serpentine indicate extremely H 2 O-rich fluids, whereas dolomite + diopside, anthophyllite + magnesite...
Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 301–345.
... plagioclase–hornblende ± zoisite zone), zoisite either occurs as large spongy aggregates that are rimmed by and altered along cracks to clinozoisite, or is generally absent with clinozoisite occurring in cracks within plagioclase and intergrown with amphibole and garnet. The disappearance of zoisite may...
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Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 197–234.
... ( Spear 1993 ): (18) \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \[prehnite\ +\ calcite\ =\ lawsonite\ +\ zoisite\ +\ H_{2}O\ +\ CO_{2}.\] \end{document} The transition...
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Journal Article
Published: 01 August 1989
Journal of the Geological Society (1989) 146 (4): 701–713.
... in localized areas, extending variable distances upwards from the base towards the top of the major lava flow, that here is the development of spectacular prehnite, analcime and minor calcite in brecciated, veined and intensely altered lava. These minerals infill and line irregular cavities. The major host...
Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 171–195.
...: phase Pi; qz: quartz; pre: prehnite; top-OH: topaz-OH; v: vapor; zo: zoisite. The relatively low pressure, central portion of the phase diagram (Fig. 2 ) is strongly constrained by the location of the upper pressure stability limit of anorthite + vapor through the equilibrium (the high...
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Journal Article
Published: 01 June 2012
Mineralogical Magazine (2012) 76 (3): 635–647.
... precipitated from a strontium-rich metamorphic solution at a late stage in the prehnite rock formation. Strontium-rich zoisite and epidote in the Su-Lu ultrahigh pressure metamorphic rocks ( Nagasaki and Enami, 1998 ) typically occur in the cores of zoned crystals and they are replaced by strontium-poor...
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Journal Article
Published: 01 June 2017
Geochemistry: Exploration, Environment, Analysis (2017) 17 (4): 315–333.
..., preventing spatially extensive mapping. Laboratory measurements (FTIR, XRD, EPMA) successfully characterize pure representatives of three calc-silicate mineral groups – epidote, pumpellyite, and prehnite – as well as mixed mineral samples from the Fortescue Group volcanics, Hamersley Basin, Western Australia...
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Journal Article
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 763–786.
.... The quartz-zoisite O-isotopic thermometer indicates a temperature of formation for zoisite between 385 and 448 °C. The sulfur isotopic composition of pyrite (between –7.8 and –1.3‰ V-CDT) associated with tsavorite in the Lelatema fold belt deposits suggests the contribution of reduced marine sulfate...
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Journal Article
Published: 01 August 2011
Clays and Clay Minerals (2011) 59 (4): 359–377.
... = prehnite, Pmp = pumpellyite, Chl = chlorite, Anl = analcime, Qtz = quartz, Alb = albite, Lws = lawsonite, Zo = zoisite, Tr = tremolite, Ep = epidote, Act = actinolite, Cal = calcite. Figure 10. Basaltic rocks altered by hydrothermal activity/low-grade metamorphism. (a) Zeolitized rocks from...
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Journal Article
Published: 02 November 2022
Geological Magazine (2023) 160 (3): 444–470.
..., chlorite, zoisite, epidote, leucoxene, analcime, prehnite, pumpellyite, quartz and zeolite (Fig.  3 d–f), indicating the ocean-floor hydrothermal overprint in the zeolite – prehnite-pumpellyite – lower greenschist facies (Mével, 2003 ). Non-ophiolite Middle Triassic basalts/andesites and tuffs derived...
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Journal Article
Published: 01 September 2016
The Canadian Mineralogist (2016) 54 (5): 1129–1146.
..., and a very fine-grained mixture of epidote, clinozoisite, zoisite, thomsonite, paragonite, prehnite, and minerals of the smectite group. Tasáryová et al . (2014) reported slawsonite in altered picrite in the Barrandien of central Bohemia, where the slawsonite forms part of an interstitial phase along...
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Journal Article
Published: 01 June 2010
The Canadian Mineralogist (2010) 48 (3): 629–650.
... associated with subsolidus alteration: albite, clinozoisite, white mica, actinolite, Nb-rich titanite, Ba-rich feldspars, harmotome, chabazite-Ca, armenite, chlorite, prehnite, and pumpellyite-(Al). Plagioclase, diopside, and zircon show trends (decreasing Ca/Na, Mg/Fe, and Zr/Hf from outer to inner units...
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Journal Article
Published: 01 June 2008
The Canadian Mineralogist (2008) 46 (3): 569–581.
... as alteration products of the primary clinopyroxene and plagioclase, respectively. Idioblastic clinozoisite and prehnite grow pseudomorphically at the expense of plagioclase grains. In some samples, veinlets filled with chlorite, prehnite and epidote cut the rodingite. The petrographic features of the Koziakas...
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Journal Article
Journal: Economic Geology
Published: 01 May 2004
Economic Geology (2004) 99 (3): 453–478.
... ). Late-stage zoisite and prehnite are minor phases. As the garnet in this assemblage contains a grossular component (12 mol %), pressure is constrained by the following anorthite-consuming reactions: \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts...
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Image
A  View looking south on the farm Sterkspruit 709 JT (Figure 3 , C6), showi...
Published: 01 June 2001
consist of pyroxene (diopside) partially altered to tremolite-actinolite. The white layers consist of a mosaic of plagioclase (albitized calcic plagioclase) with accessory zoisite, epidote and sphene (after Anhaeusser, 1979 ). F Photomicrograph showing subhedral cumulate olivine crystals
Journal Article
Published: 01 April 1989
Journal of the Geological Society (1989) 146 (2): 353–356.
... diagenetic-zone alteration while adjacent metabasites have assemblages of prehnite- pumpellyite facies. The higher grade imprint in the latter was ascribed to their higher primary porosity, facilitating infiltration of comparatively hot deep-seated fluids. B. W. D . Yardley (in a joint paper with C. Katagas...
Journal Article