 | | Journal (issue) | | fromtheAndranondambo mineinSEMadagascar: evidence for metasomatic skarn formation by E.J. Gübelin1 and A. Peretti2...fluorapatite, fluor-phlogopite, fluorite, baddeleyite, zirconolite, potassiumfeldspar, anorthite, scapolite (meionite)...sapphires have formed during several different metasomatic events. The later blue sapphire generations have...of cuttable corundum in the southern part of the island, while Koivula et al. (1992) were the first to...founded to excavate and market the sapphires. metasomatic events which occurred in the mining area and |  | | Journal (article/letter/editorial) | | nepheline syenite), metamorphic (marble), and metasomatic (skarn, calc–silicate veins) rocks. Metasomatites...Perovskite has been studied at four sites of metasomatic rocks of three different types: forsterite–spinel...marble (1); skarn at contacts between nepheline syenite and brucite marble (2), and skarn-related forsterite–spinel...vein of this type. Perovskite from the contact skarn (type 2) contains 1.5 to 4.5 wt.% REE2 O3 but is...poor in other impurities. Perovskite grains from skarn-related Fo-Spl calc–silicate rocks (type 3) belong |  | Ahijado, A., Casillas, R., Nagy, G., Fernández, C. (2005) Sr-rich minerals in a carbonatite skarn, Fuerteventura, Canary Islands (Spain) Mineralogy and Petrology, 84 (1) 107-127 doi:10.1007/s00710-005-0074-8 | Journal (article/letter/editorial) | | 1007/s00710-005-0074-8 Sr-rich minerals in a carbonatite skarn, Fuerteventura, Canary Islands (Spain) A. Ahijado1...Summary Metamorphosed carbonatites and related skarn deposits, located in Fuerteventura Basal Complex...origin. Textural evidence indicates that the first skarn stage garnet þ diopside þ Sr–Na aluminosilicate...high temperature assemblages during the retrograde skarn stage. During the final evolution stages, further...carbonatites, relatively few studies have characterised skarn deposits associated with alkaline and carbonatite |  | Whitley, Sean, Halama, Ralf, Gertisser, Ralf, Preece, Katie, Deegan, Frances M, Troll, Valentin R (2020) Magmatic and Metasomatic Effects of Magma–Carbonate Interaction Recorded in Calc-silicate Xenoliths from Merapi Volcano (Indonesia) Journal of Petrology, 61 (4) doi:10.1093/petrology/egaa048 | Journal (article/letter/editorial) | | submitted to Journal of Petrology Magmatic and metasomatic effects of magma-carbonate volcano (Indonesia)...economic mineralisation. Abundant calc-silicate skarn xenoliths are found at Merapi volcano, Indonesia...identify two distinct xenolith types: magmatic skarn xenoliths, which contain evidence of formation within...crystalline metamorphosed wall-rocks. The magmatic skarn xenoliths comprise distinct compositional and mineralogical...on Fe3+/ΣFe in clinopyroxene indicate magmatic skarn xenolith formation conditions of ~850 ± 45°C, < |  | | Journal (article/letter/editorial) | | much as 86% in a calcitic contact ED metamorphic skarn in immediate vicinity of a granodiorite intrusion;...(1982b) identified, in the case of the Yerington skarn in Nevada, a decreasing oxygen fugacity with distance...Comparing mineralogy of a natural dolomite-bearing skarn in Russia with the MELTS model, Wenzel (2002) suggested...increased presence of iron-magnesium oxides in a skarn should PT indicate heightened Mg-content of the...during magmatically active, warm times with high sea levels in Earth’s CE history, e.g. in the Cretaceous |  | | Journal (issue) | | Andranondambo mine in SE Madagascar: evidence for metasomatic skarn formation", Journal of Gemmology 25(7), 453-470...Williams C.T. (1996), "The occurrence of niobian zirconolite, pyrochlore and baddeleyite in the Kovdor carbonatite |  | | Book | | in different geological settings, that include inland stream placers, carbonatites, alkaline to sub-alkaline...resources in India which include beach placers, inland stream placers, carbonatites, peralkaline-alkaline...located in various coastal stretches, including a few inland, in parts of Odisha, Andhra Pradesh, Tamil Nadu...features of heavy REE (HREE) resources occurring as inland placers along the courses of several streams draining...phosphorite, bauxite, laterite, phosphate ores, sea bed/floor mud and ion adsorption clays. Chapter 9 |  | | Book | | Outcrops of episyenite and of contact-metamorphic skarn rocks in the High Atlas mountains around the town...personal communi ation to Rock Currier, 2002). Island of Seriphos. The ve111 best of the classic ilvaite...exploited a polymetallic deposit surrounded by a thick skarn (Ton) Potucek. personal communication, 2015). The...per'>onalcommunication, 2007). 4 ITALY Rio Marina area, Island of Elba, Tuscany. Elba (Latin: llva) is the type...iron ore deposits along the eastern edge of the island, and fine groups of lustrous, chocolate-brown, |  | | Report (volume) | | The McGerrigle aureole, Quebec The Tono aureole, Japan Other aureoles from sub-facies series Type Ic Regional...an Dubhaich contact aureole Kaizuki-yama granit, Japan Santa Ollala tonalite, Spain Aankit basaltic feeder...carbonate lithologies are products of wholesale metasomatic transformation. Because skarns are host rocks...of particular note), the elucidation of the metasomatic controls and processes in the genesis of skarns... M.T., Meinert, L.D. and Newberry, R.J. (1981) Skarn deposits. Econ. Geol. 75, 317-391. Emst, W.G. (1976) |  | | Journal (issue) | | HyS EM Flanigen/Quintessa/Linde/USA Adachi Shin/Japan Regency/Vacuum Ventures/USA HyS 1988 Aquamarine...Sapphire, colourless tubes, etc. Bijoreve/Seiko/Japan 1983 Ruby, etc. (NC) Union Carbide/USA and others...nodules the size of oranges and lemons from the island of Staritzo. These spectacular forms are illustrated...crystals also occur in Peru, Bolivia, Chile, Brazil, Japan and Mexico. 'Sand dollars' are particularly known... Previously, research laboratories in the USA, Japan, Russia, China and France have reported their experimental |  | | Book | | is one of Britain's most remote locations, the island ofRockall, which is located in the North Atlantic..., < : r" _ Aran Island l!l\. ')- E Arran ,.. Ralhfin Island Achill Island .Edinburgh Bute ...MIDLANDS EAST E N G L A N D ANGLIA W A L E S Ramsey Island SkomerIsland Cardiff• Londone Isleof Sheppey...·· RTffU ,T( BE , f , u • Newbiggin-by-lhe-Sea Bedlington• I Gunnerton• ······.'" •Backworth...the exhalation of hot mineralizing fluids into the sea during Ordovician times, probably in the form ofblack |
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