 | | Journal (article/letter/editorial) | | Quartz Veins in Piemontite Schist, Western Otago, New Zealand D. S. C o o m b s , Y. K a w a c h i , and...Reay Geology Department, University of Otago, Dunedin, New Zealand With 4 Figures Received November 15,...crack-seal quartz veins in quartz-albite-piemontite-spessartine-phengitehematite-chlorite-rutile-tourmaline +...of the Haast Schist Group near Arrow Junction, western Otago, New Zealand. The Mn2+/Mn3+-ratio is sensitive...940.7(2) A s. Associated mineral phases are spessartine, hematite, piemontite containing ,-~0.7% SrO |  | KAWACHI, YOSUKE, GRAPES, RODNEY H., COOMBS, DOUGLAS S., DOWSE, MARTIN (1983) Mineralogy and petrology of a piemontite-bearing schist, western Otago, New Zealand. Journal of Metamorphic Geology, 1 (4) 353-372 doi:10.1111/j.1525-1314.1983.tb00280.x | Journal (article/letter/editorial) | | schist, western Otago, New Zealand YOSUKE KAWACHl, Geology Department, University of' Otago, Dunedin, Nen...Wellington, New Zealand DOUGLAS S . COOM BS, Ceologj. Department. University of' Otago, Dunildiii, New Zealand...Wellington, New Zealand Abstract. Pink piemontite-spessartine-bearing and grey-green spessartine-bearing...near Arrow Junction. western Otago. Electron microprobe data are reported for sphene, spessartine-rich...to below this critical buffering value in a spessartine-rich schist and it was close to or below the |  | Coombs, Douglas S., Dowse, Martin, Grapes, Rodney, Kawachi, Yosuke, Roser, Barry (1985) Geochemistry and origin of piemontite-bearing and associated manganiferous schists from Arrow Junction, western Otago, New Zealand. Chemical Geology, 48 (1) 57-78 doi:10.1016/0009-2541(85)90035-x | Journal (article/letter/editorial) | | ASSOCIATED MANGANIFEROUS SCHISTS FROM ARROW JUNCTION, WESTERN OTAGO, NEW ZEALAND DOUGLAS S. C O O M B S I, M...1Department of Geology, University of Otago, Dunedin (New Zealand) 2 Department of Geology and Joint Mineral...Victoria University o f Wellington, Wellington (New Zealand) (Received March 21, 1984; accepted for publication...associated manganiferous schists from Arrow Junction, western Otago, New Zealand. Chem. Geol., 48: 57--78. Closely...overlying quartzofeldspathic schists at Arrow Junction, Otago, New Zealand. Chemically the quartzose schists |  | | Journal (article/letter/editorial) | | facies, near Meyers Pass, Torlesse Terrane, New Zealand D . S. C OO MB S , Y . KAWAC H I A N D P . B...D Geology Department, University of Otago, Dunedin, New Zealand A B S TR A CT Moderately manganiferous...Meyers Pass, Torlesse Terrane, South Canterbury, New Zealand, have been metamorphosed in the prehnite–pumpellyite...pummax pellyite, manganoan chlorite and trace spessartine-rich garnet and sphalerite have formed in an...lower-grade greenschist and blueschist facies of New Zealand and Japan. Mn in the manganoan pumpellyites substitutes |  | | Journal (issue) | | batch of pieces we brought back from the Ritter Quarry that had nice thomsonite and mesolite, so that...the metamorphic rocks. The picture here is of a region on sediments that get heated by the intrusion of...partially melted and subsequently recrystallize into new minerals. Clearly, the resulting species are going...photogenic. Fig. 4. Pyrrhotite Geikielite Jensen Quarry, Riverside Co., California Spinel 6 Fig. 5...Fe3Al2Si3O4 , or spessartine, Mn3Al2Si3O4 . It is also possible that the original Fig. 6. Axinite New Melones |  | | Journal (article/letter/editorial) | | piemontite (Keskinen & Liou, 1979). This paper presents new experimental results examining the effect of Fe on...garnet + anorthite (with garnet becoming more spessartine-rich with decreasing fo,) is highly suggestive...yields a garnet composition of grossular 33 : spessartine 27 : andradite 40. I n order to check these assumptions...take place over a narrow divariant fo,-T or P-T region, with experimentally determined equilibrium values... + piemontite in nature are uniformly more spessartine-rich than the garnets formed by breakdown of |  | | Journal (article/letter/editorial) | | collected from a single outcrop located in an abandoned quarry SW of Zahinos (UTM coordinates X 679.151; Y ...Jimenez-MillaÂn et al., 1994). The presence of spessartine in the studied rocks suggests a lower temperature...crystals smaller than 20 mm. In this association, spessartine forms euhedral crystals smaller than 50 mm (often...hematite spessartine piemontite a: Hematite quartz albite b: Ti±braunite hematite spessartine piemontite...by the presence of silicates with Al and Mn (spessartine and piemontite). The garnets in these metatuffs |  | | Journal (article/letter/editorial) | | composition contain the assemblage quartz+piemontite+ spessartine + braunite + Mg-chlorite + hematite + phengite...Abstract. sursassite + braunite + quartz = spessartine + clinochlore_+ hematite + H20 4- 02 (1) sursassite...sursassite + braunite + phengite + quartz = spessartine + phlogopite _4-hematite + H20 + 02 (2) and...[hematite, piemontite] + hematite + quartz = spessartine + clinochlore + H20 + Oz (3) Reactions (1)...breakdown of sursassite and the formation of spessartine during prograde metamorphism of the piemontite |  | | Journal (article/letter/editorial) | | and may be replaced by chlorite. The garnet is spessartine-rich. Mn – oxides such as braunite and hausmanite...associated manganiferous schists from arrow Junction, Western Otago, New Zealand. – Chem. Geol. 48: 57–78. Corliss |  | | Journal (article/letter/editorial) | | piemontite--spessartine and piemontite quartzites (PSQ), containing braunite-rich lenses; (2) spessartine quartzites...change into NpxQ by a decreasing content of spessartine. While SQ is chemically equivalent to a montmorillonitic...montmorillonitic clay + Mn 2÷ + Na ÷, almost spessartine-free NpxQ can be derived from Fe-rich nontronitic...either as lensiform braunite--quartz bodies or as spessartine-, piemontite-, or Na-pyroxene-rich quartzites...of ferromanganoan metasediments (piemontite--spessartine-, spes- sartine- and Na-pyroxene quartzites) |  | | Journal (article/letter/editorial) | | calcite and caryopilite. Tephroite, rhodonite, spessartine, and accessory alleghanyite and sonolite formed... hausmannite, rhodonite, tephroite and (or) spessartine. Taliaferro and Hudson (1943) proposed a similar...and Sharp (1989) discussed the tectonics of the region in terms of terranes that are bounded mostly by...rhodochrosite +_barite rhodonite _+rhodochrosite _+spessartine _+pyrophanite _+chlorite rhodochrosite +jacobsite..._+alleghanyite or tephroite or sonolite tephroite + spessartine + chlorite + rhodochrosite _+jacobsite _+pyrophanite |  | | Journal (article/letter/editorial) | | (including tephroite,the Mn humitc-groupminerals,spessartine, rhodonite,and pyroxmangite), and the oxidesgalaxiteand...continentalor andesiticsource,is reflectedin spessartine-rich layers.MinorMn andCo sulfidemineralization...Rhodochrosite P P P P -- P P __• p p2 Lead district is 25 km to the northeast. Gair and Slack (1984)...deChlorite p __a __a __ positisoneof a numberof spessartine-rich Mn occurGageitc p __4 __4 __4 rencesin the...sfollows.Massivespessartine Broken Hill deposit,New South Wales, Australia, garnetformsa 0.6-m-widelensin |  | | Report (volume) | | knowledge of minerals. Due to the application of new analytical techniques, the number of newly discovered...regarding the epidote minerals and there is a need for a new overview that brings together the recent knowledge...sponsor of mineral collections, found and described a new mineral in a handspecimen from the Saualpe Mountains...reported, examples include clinozoisite from Willsboro, New York, with about XEp = 0.03 (DeRudder and Beck 1964;...epidote that occurs in granitoid rocks from New Zealand (Tullock 1979). Natural binary Al-Mn3+ solid |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Dana’s New| Mineralogy | Eighth Edition Richard V. Gaines H. Catherine W. Skinner Eugene E. Foord Brian...Mason Abraham Rosenzweig i DANA’S NEW MINERALOGY DANA’S NEW MINERALOGY The System of Mineralogy...ROCHESTER, NEW YORK And with Illustrations by ERIC DOWTY SHAPE SOFTWARE JOHN WILEY & SONS, INC. NEW YORK...Department, John Wiley & Sons, Inc., 605 Third Avenue, New York, NY 10158-0012. This publication is designed...ation Data Dana, James Dwight, 1813-1895 Dana’s new mineralogy: the System of mineralogy of James Dwight |
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