 | | Journal (article/letter/editorial) | | from the classical Barrovian metamorphic zones in Scotland M. ZENK AND B. SCHULZ* Institut fuÌr Geologie...actinolite in cores and magnesio-hornblende to tschermakite in rims. Poor amphibole zonations occur in the...metamorphism, geothermobarometry, Barrovian, Dalradian, Scotland. Introduction IN the mainly psammopelitic successions...successions of the Dalradian Supergroup of Scotland, basic rocks occur as volcanic and volcanoclastic intercalations...actinolite cores to green magnesio-hornblende and tschermakite rims (Fig. 4c). Altot increases from 0.22 to |  | | Journal (article/letter/editorial) | | Amphiboles from Dalradian Metasedimentary Rocks of NE Scotland: Environmental Inferences and Distinction from...towards alumino-tschermakite [MgSi ~ AFiA1iv] and from tremolite towards ferri-tschermakite [MgSi ~ FeViAl~V]...towards the ferro-actinolite, edenite, alumino-tschermakite and ferritschermakite end-members. These distinctive...Introduction The late-Proterozoic Dalradian Supergroup of Scotland and Ireland contains several formations which... Amphiboles from Dalradian Metasedimentary Rocks of NE Scotland 47 therein; Orville, 1969; Van de Kamp, 1969 |  | | Journal (article/letter/editorial) | | and Mg that can be modelled as progress along tschermakite, edenite and FeMg-, exchange vectors from tremolite...shear zones in Scourian mafic dykes, north-westem Scotland, there have been numerous studies which have outlined...Centre, Boston Spa, Wetherby. West Yorkshire LS23 7BA, UK. Please quote Sup No. 90309. I fcao _1 2.5 ...variation can be represented by progress along the tschermakite (Mg- ,Si-,AI'VAIV') and the edenite (Si_,NaAIrV)...into the tetrahedral site (tschermakite, ferri-tschermakite, Ti-tschermakite and edenite). If all of these |  | | Journal (article/letter/editorial) | | by magnesiohornblende (and edenite) and minor tschermakite (and pargasite or hastingsite). The zoning suggests...General zonation is well described in terms of the tschermakite, the edenite and the Fe3+Al 1, the MgFe2+1,...magnesioactinolite and magnesiohornblende ïŹelds, reaching the tschermakite ïŹeld, and the Fe-richer ïŹelds. A second population...edenite; whereas, the actinolite cores and the tschermakite (or pargasite) rims are scarcer. In quartzite... Mg/(Mg+Fe2+) vs. Si diagram. ^: actinolite tschermakite series. 6 782 ZONED CA-AMPHIBOLE FROM THE |  | | Journal (article/letter/editorial) | | Amphiboles from Dalradian metasedimentary rocks of NE Scotland: environmental inferences and distinction from...towards alumino-tschermakite [MgSi ~ AlViA1iv] and from tremolite towards ferri-tschermakite [MgSi ~ FeViAliV]...towards the ferro-actinolite, edenite, alumino-tschermakite and ferritschermakite end-members. These distinctive...Stephenson: Amphiboles from Dalradian rocks, NE Scotland Zusammenfassung Amphibole in Metasedimenten der |  | Bai, Yang, Su, Ben-Xun, Xiao, Yan, Lenaz, Davide, Asamoah Sakyi, Patrick, Liang, Zi, Chen, Chen, Yang, Sai-Hong (2018) Origin of Reverse Zoned Cr-Spinels from the Paleoproterozoic Yanmenguan MaficâUltramafic Complex in the North China Craton. Minerals, 8 (2) 62 doi:10.3390/min8020062 | Journal (article/letter/editorial) | | Cr-spinel grains occur as inclusions in enstatite, tschermakite, phlogopite, and olivine, or as interstitial...olivine, enstatite, diopside, Cr-spinel, and tschermakite, with minor phlogopite, magnetite, and sulfides...range of 0.1â0.5 cm in diameter. Diopside and tschermakite occur as large oikocrysts or small anhedral...peridotite and consists mainly of enstatite, tschermakite, diopside, olivine, and Cr-spinel, with accessory...with sizes in the range of 0.2â1 cm, whilst tschermakite is relatively small in size and less abundant |  | | Journal (article/letter/editorial) | | localised partial melting. Migmatite and associated tschermakiteâclinozoisite gneiss form irregular, elongate...microstructure and chemistry are consistent with the tschermakiteâclinozoisite gneiss and migmatite representing...two-pyroxeneâ pargasite gneiss (PP gneiss; Fig. 2a); (2) tschermakiteâclinozoisite gneiss (TC gneiss, Fig. 2b); and...to the dykes. Tschermakiteâclinozoisite (TC) gneiss The TC gneiss comprises tschermakite (Ts2a), quartz...rims of coarse-grained tschermakite (Ts2a) and centres of fine-grained tschermakite (Ts2a) and quartz. These |  | Kawai, T., Windley, B.F., Shibuya, T., Omori, S., Sawaki, Y., Maruyama, S. (2008) Large PâT gap between Ballantrae blueschist/garnet pyroxenite and surrounding ophiolite, southern Scotland, UK: Diapiric exhumation of a Caledonian serpentinite mĂ©lange. Lithos, 104 (1) 337-354 doi:10.1016/j.lithos.2008.01.005 | Journal (article/letter/editorial) | | pyroxenite and surrounding ophiolite, southern Scotland, UK: Diapiric exhumation of a Caledonian serpentinite... The University of Leicester, Leicester LE1 7RH, UK Received 25 July 2007; accepted 29 January 2008 Available...Abstract The Ballantrae ophiolite in southern Scotland includes a NEEâSWW-trending serpentinite mĂ©lange...diapiric exhumation in the Caledonian orogen of SW Scotland. © 2008 Elsevier B.V. All rights reserved. Keywords:...background Fig. 1 shows a simplified geological map of Scotland and Ireland and a cross-section based on the NEC |  | | Journal (article/letter/editorial) | | that approaches the closest to hypothetical tschermakite comes from a kyanite-bearingaluminous high-...a c h to the h y p o t h e t i c a l p u r e tschermakite Ca2MgaA12Si6A12(OH)zO2z, which contains 2.oo...high contents of A1vi and therefore approaching tschermakite is an old amphibole analysis by J. V. Lewis...Switzerland. M. Frey (1969, p. 68). 6: MF228, Alumino-tschermakite, same material as 5. SiO~ and A12Oa by microprobe...thus approaches the closest to hypothetical tschermakite Ca~MgaAlvi2Si6AliVz(OH)zO~2 of any analysed |  | | Book (volume) | | Society, Burlington House, Piccadilly, London W1V OJU, UK. The Society is a Registered Charity, No. 210161...Brassmill Enterprise Centre Brassmill Lane Bath BA1 3JN UK (Orders: Tel. 01225 445046 Fax 01225 442836) Distributors...Typeset by Type Study, Scarborough, UK. Printed by The Alden Press, Oxford, UK. Australia (Orders: Tel. (08)...Hornblendes EdeniteâFerro-edenite TschermakiteâFerro-tschermakite PargasiteâFerro-pargasite Magnesi...Ca,(L,M,)Si;Al,0,,(OH), Magnesio-hornblende = Tschermakite Ca,L;Sig0,,(OH), Tremolite ââââ> IAI Fig |  | Jarrar, Ghaleb H., Stern, Robert J., Theye, Thomas, Yaseen, Najel, Pease, Victoria, Miller, Nathan, Ibrahim, Khalil M., Passchier, Cees W., Whitehouse, Martin (2017) Neoproterozoic Rosetta Gabbro from northernmost ArabianâNubian Shield, south Jordan: Geochemistry and petrogenesis. Lithos, 284. 545-559 doi:10.1016/j.lithos.2017.05.008 | Journal (article/letter/editorial) | | found: 1) large, 3-5 mm, brown ferri âtitanian-tschermakite NU (K0.09Na0.28)(Na0.20Ca1.80)(Mn0.04Fe3+...The Rosetta gabbro consists primarily of brown tschermakite extensively replaced by pale green magneisohornblende...bytownite plagioclase (Figs. 5A and 6C). The brown tschermakite contains many opaques. Some hypersthene and...non-rosetta hornblende gabbro also consists of brown tschermakite extensively replaced by light green magnesiohornblende...obvious: Compared to the magnesio-hornblende, the tschermakite is lower in silica (mean = 41.28 ï±1.04 vs. 47 |  | AOKI, K., WINDLEY, B. F., MARUYAMA, S., OMORI, S. (2014) Metamorphic PâT conditions and retrograde path of high-pressure Barrovian metamorphic zones near Cairn Leuchan, Caledonian orogen, Scotland. Geological Magazine, 151 (3) 559-571 doi:10.1017/s0016756813000514 | Journal (article/letter/editorial) | | metamorphic zones near Cairn Leuchan, Caledonian orogen, Scotland K . AO K I â â , B . F. W I N D L E Y âĄ, S . M...Geology, University of Leicester, Leicester LE1 7RH, UK §Department of Earth and Planetary Sciences, Tokyo...Barrovian metamorphic zones in the Caledonides of Scotland have been well studied for their protolith sedimentation...zones at Cairn Leuchan in northern Glen Muick, Scotland using relevant petrology, mineral compositions...the Northern Highland and Grampian terranes of Scotland (Fig. 1) are sub-divided into the Moine and Dalradian |  | Reato, Luca, HuraiovĂĄ, Monika, KoneÄnĂœ, Patrik, Marko, FrantiĆĄek, Hurai, Vratislav (2022) Formation of Esseneite and Kushiroite in Tschermakite-Bearing Calc-Silicate Xenoliths Ejected in Alkali Basalt. Minerals, 12 (2) 156 doi:10.3390/min12020156 | Journal (article/letter/editorial) | | Article Formation of Esseneite and Kushiroite in Tschermakite-Bearing Calc-Silicate Xenoliths Ejected in Alkali...V. Formation of Esseneite and Kushiroite in Tschermakite-Bearing Calc-Silicate Xenoliths Ejected in Alkali...Randomly oriented and elongated pseudomorphs are tschermakite crystals replaced by olivine, spinel and plagioclase...theoctahedral octahedralsite site isisdiagnostic of tschermakite (Table 2). Crystal chemical formula calculated...calculated from EPMA diagnostic of tschermakite (Table 2). Crystal chemical formula calculated from EPMA analyses |  | | Journal (article/letter/editorial) | | Sciences, University of Cambridge, Cambridge CB2 3EQ, UK R. Powell School of Earth Sciences, The University...Ca2Mg5Si8O22(OH)2 ferroactinolite: Ca2Fe5Si8O22(OH)2 tschermakite: Ca2Mg3Al4Si6O22(OH)2 pargasite: NaCa2Mg4Al3Si6O22(OH)2...model: tremolite, tschermakite, pargasite, glaucophane, ferroactinolite, ferri-tschermakite, K-pargasite,...combined together for the four equilibria: 1. Tschermakite±tremolite: 12:25 0:1225 T  7:082 P  RT ln...careful study of Jenkins (1994) on tremolite± tschermakite amphiboles was used by Holland and Powell (1998) |  | Chu, Xu, Ague, Jay J., Axler, Jennifer A., Tian, Meng (2016) Taconian retrograde eclogite from northwest Connecticut, USA, and its petrotectonic implications. Lithos, 240. 276-294 doi:10.1016/j.lithos.2015.10.011 | Journal (article/letter/editorial) | | 2010). The vein-hosted rutiles and the high-Cl tschermakite inclusions in TE D garnet suggest the presence...composition of amphibole continuously evolves from tschermakite/pargasite to hornblende as pressure decreases...breakdown reaction, the mode of garnet + corona, the tschermakite inclusions in garnet, the reintegrated omphacite...amphibole evolution along the decompression path (tschermakite â hornblende â actinolite) is also qualitatively...texture of tschermakite formation during the compression process (3â4 MA in Fig. 9); tschermakite was less |  | | Journal (article/letter/editorial) | | University, West Mains Road, Edinburgh EH9 3JW, Scotland. On the basis of a large number of analyses of...Fe3+) M~I~-~a}AilV.= = (Mg, Fe) ~I~- u~3~SiIV: tschermakite substitution Combination of these gives the...relative importance of the edenite-forming (1) and tschermakite-forming (2) and (3) reactions with increasing...some P-T conditions, amphiboles are enriched in tschermakite up to the beginning of the amphibolite facies...Highlands (Fig. 2) show a characteristic trend of tschermakite enrichment with terrains is illustrated in Figs |  | | Journal (article/letter/editorial) | | 337â352 Cummingtonite in the Dalradian of NE Scotland C. G. SMITH AND E. R. PHILLIPS* British Geological...Murchison House, West Mains Road, Edinburgh EH9 3LA, UK ABSTR ACT The first recorded occurrence of cummingtonite...metamorphism, Dalradian, NE Scotland. Introduction T HE Dalradian Supergroup of Scotland and Ireland (Harris...ferro-actinolite, edenite, aluminotschermakite and ferro-tschermakite endmembers (Stephenson, 1993). This paper documents...development of cordierite, andalu- CUMMINGTONITE IN SCOTLAND cummingtonite cummingtonite-bearing rock biotite |  | | Journal (article/letter/editorial) | | gabbro/diorite and tonalite are clacic-amphibole (Tschermakite) (Leake 1977). However, the amphibole displays...outer zone consists of augite, plagioclase, tschermakite and actinolite. Much of augite is euhedral,...indicating its early crystallization from the melt. Tschermakite occurs as subhedral crystals enclosed apatite...alignment of biotite flakes, associated with tschermakite in the tonalite. The mineralogical composition...plagioclase, quartz, biotite, alkali feldspar and tschermakite. Quartz and perthitic microcline occur as anhedral |  | | Journal (article/letter/editorial) | | zoning from Mg-hornblende and actinolite to tschermakite, and then to Mg-hornblende (or actinolite).... respectively) mantled by Mg-hornblende and tschermakite. The mantle shows a continuous rimward zonation...magnesio-hornblende cores (Si4+: 6.70 6.50 a.p.f.u.) through tschermakite mantles (Si4+: 6.18 6.44 a.p.f.u.) to narrow...inner parts of these crystals are composed of tschermakite and show relatively high AlVI (0.97 1.09 a.p...are generally composed of Mg-hornblende and tschermakite with relics of actinolite in the inner parts |  | | Journal (article/letter/editorial) | | amphibole crystals. Thus substitution of the tschermakite component (Ca2(Mg3A12) (Si6A12) O2z(OH)2) alone...(alumino-tschermakite). In the presence of forsterite the upper stability of alumino-tschermakite is governed...of Oba (1978) who reports that pure alumino-tschermakite is stable with respect to the assemblage anorthite...univariant boundary and showed that pure alumino-tschermakite was not stable. With this information, amphibole...O b a (1978), who reports that pure alumino-tschermakite is stable at the conditions o f reaction B (i |  | | Journal (article/letter/editorial) | | Loch Lomond and Appin appinite suites, western Scotland Syed Hamidullah] HAMIDULLAH, S. 2007. Petrography...Loch Lomond and Appin appinite suites, western Scotland. Proceedings of the Geologists' Association, 118...lamprophyres in the Loch Lomond district of western Scotland assist in elucidating the nature of the parent...appinite, mineral chemistry, petrography, pyroxene, Scotland Director, National Centre of Excellence in Geology...to Loch Leven, west of Ballachulish in western Scotland. The appinites occur together with ultrabasic-ultramafic |  | | Journal (article/letter/editorial) | | samples). Other types of calcic amphiboles are tschermakite (Ts), edenite (Ed), pargasite (Prg) (all detected...detected in three samples), ferroamphiboles are tschermakite (Ts), edenite (Ed), pargasite (Prg) (all detected...presence of magnesio-hornblend (Mhb), tschermakite tschermakite (Ts), (Ts), magnesio-hornblend (Mhb),...and ferro-tschermakite not found. B (lower diagram) the presence of pargasite ferro-tschermakite (Fts) (Fts)...(Ts) (in three samples), samples), and by ferro-tschermakite (Fts) and actinolite (Act) both detected in |  | | Journal (article/letter/editorial) | | Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK International Geology Review Publication details...SEMAIL OPHIOLITE clinopyroxene is rich in Ca-tschermakite component and is not jadeitic; (3) subophiolitic...9 wt%, and 12.5 to ~9.5 wt%. This indicates tschermakite, CaTiAl -2 , CaMg -1 , and FeMg-1 exchanges...written for iron end members (Fe-tremolite and Fe-tschermakite). Calculations with the iron SEMAIL OPHIOLITE...continuous increase in Ca-tschermakite, jadeite, aegirine, and Ti-tschermakite components up section. Poli |  | | Journal (article/letter/editorial) | | ferro-actinolite that may be due to an increase in tschermakite substitution. Both discontinuities are accompanied...(edenite), TSi â1 C(Mg, Fe, Mn) â1 T Al 1 CAl 1 (tschermakite), BCaâ1B(Fe, Mg, Mn)1 (cummingtonite-grunerite)...amphiboles on the relevant binary joins tremolite-tschermakite (Smelik et al. 1994; Jenkins et al. 1997), ...Shinness Loch Shin, NW Lairg, Ross and Cromarty, Scotland Bastica, Corsica Muncaster Road, Laytonsville...Austria Carr Brae Dornie, Inverness-shire, N.W. Scotland Heiligenblut, Australia Conda deposit, Barstow |  | | Journal (article/letter/editorial) | | Edinburgh, West Mains Road, Edinburgh EH9 3JW, Scotland, UK 2 Department of the Geophysical Sciences, University...Table 1 Kosmochlor Jadeite Aegerine Ti Tschermakite Ca Tschermakite Diopside Hedenbergite Johannsenite En+Fs+Rh...by the Carnegie Trust for the Universities of Scotland. Yvonne Cooper is thanked for the preparation...Carbonatite-nephelinite volcanism. Wiley, London, UK, p 347 McKie D (1966) Fenitization. In: Tuttle OF |
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