1-20 OF 82 RESULTS FOR

Zoisite-prehnite gabbro

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 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
Published: 01 September 1972
Canadian Journal of Earth Sciences (1972) 9 (9): 1216–1229.
... from adjoining relatively undeformed pillowed lavas.The dikes are metamorphosed but relict textures are everywhere preserved. Actinolite, epidote, chlorite, and zoisite are the commonest metamorphic minerals. Prehnite is abundant in some places and pumpellyite and other minerals of the zeolite facies...
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...
FIGURES | View All (14)
Journal Article
Published: 02 November 2022
Geological Magazine (2023) 160 (3): 444–470.
... and magnesiohornblende) and Fe-Ti oxide (magnetite-ulvöspinel) are late-stage crystallization products. The gabbro consists of plagioclase, augite and Fe-Ti oxide (Fig.  3 b, c). Gabbroic rocks of the KU mélange bear an omnipresent prehnite-pumpellyite to greenschist facies metamorphic overprint that produced...
FIGURES | View All (11)
Journal Article
Published: 01 June 2008
The Canadian Mineralogist (2008) 46 (3): 569–581.
... analyses were carried out at the Department of Earth Sciences, University of Bristol, U.K. epidote-rich rodingites (with the assemblage clinozoisite, zoisite and minor diopside and titanite), grossular-rich rodingites (with the assemblage hydrogrossular, prehnite and minor diopside...
FIGURES | View All (6)
Journal Article
Published: 01 June 2010
The Canadian Mineralogist (2010) 48 (3): 629–650.
..., hydrogrossular, andradite), diopside, epidote-group minerals (epidote, clinozoisite, zoisite, allanite), amphibole-group minerals (actinolite, tremolite), vesuvianite, wollastonite, chlorite, phlogopite, clintonite, prehnite, spinel, calcite, plagioclase and quartz ( Klápová & Novák 1997 , unpubl. data...
FIGURES | View All (7)
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...
FIGURES | View All (9)
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...
FIGURES | View All (10)
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...
FIGURES | View All (10)
Journal Article
Published: 01 January 2008
Exploration and Mining Geology (2008) 17 (1-2): 51–66.
.... The earliest veins were zoisite-filled, followed by epidote-amphibole assemblages in granite, then epidote-quartz, and finally quartz. In the metagabbros, amphibole-biotite is succeeded by prehnite- then chlorite-dominated assemblages, reflecting the same trend. This cooling trend was contained within...
FIGURES | View All (11)
Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 347–398.
... zoisite belongs to the peak stage assemblage whereas epidote is a retrograde phase in both the barroisite-bearing and rutile-rich Fe-Ti eclogites. The coherent layering of the eclogitic rocks suggests a cumulate origin with anorthositic plagioclase to olivine-rich gabbro cumulate as the protolith...
FIGURES | View All (33)
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...
FIGURES | View All (11)
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
Published: 01 July 2002
The Journal of Geology (2002) 110 (4): 371–391.
... overprint at greenschist to upper-prehnite-pumpellyite facies. The overprint is followed by localized prehnite-filled fractures; only thin green hornblende veins are observed in gabbros (Peters and Mercolli 1998 ). The Sama’il ophiolite was created in the Cenomanian at a fast-spreading ridge...
FIGURES | View All (9)
Journal Article
Published: 01 February 2002
Mineralogical Magazine (2002) 66 (1): 93–119.
..., mineral assemblages documented in the literature for a variety of high- P and ultrahigh- P terranes indicates that high- P and ultrahigh- P mineral assemblages are generally not anhydrous ( Mottana et al. , 1990 ). Phengite, lawsonite, zoisite, glaucophane, chloritoid and paragonite are all water...
FIGURES | View All (7)
Journal Article
Published: 01 May 2013
American Mineralogist (2013) 98 (5-6): 955–965.
... by the infiltration of an external aqueous fluid from the neighboring lithologies. This second alteration stage essentially resulted in the hydration and breakdown of plagioclase to epidote, thomsonite, and variable amounts of zoisite, clinozoisite, prehnite, sphene, smectite, calcite, paragonite, and Sr-feldspar...
FIGURES | View All (6)
Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 495–552.
... the Apennine, Italy. In Val Graveglia, Northern Apennine, piemontite occurs in manganese ore deposits within the metacherts on top of an ophiolite sequence. Here, a prehnite-pumpellyite facies metamorphism produced complex unusual Mn rich mineral assemblages including a wide variety of rare mineral species...
FIGURES | View All (19)
Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 09 March 2022
Lithosphere (2022) 2022 (1): 9507697.
.... These include epidote, zoisite, pumpellyite, prehnite, vesuvianite, tremolite, actinolite, talc, and opaque minerals [ 5 , 6 ]. Rodingitization of mafic protoliths is often associated with serpentinization of the surrounding ultramafic rocks [ 5 , 7 – 9 ]. These processes result in the loss of alkali...
FIGURES | View All (10)
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...
FIGURES | View All (23)
Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 235–300.
... for equilibrium of epidote ( X ps = 0–0.3), prehnite, quartz, and solution (Fig. 15B ; Stefánsson and Arnórsson 2002 ). Located in southeastern Iceland, this tholeiitic central volcano formed within the Iceland rift zone approximately 5–6 Ma, first by uplift during emplacement of gabbros, then caldera...
FIGURES | View All (25)