Ferri-kaersutite was originally described from the Deeti volcanic cone, Gregory Rift, Rift Valley Province, Kenya (IMA2011-035).This material was later renamed Oxo-magnesio-hastingsite by Zaitsev et al.(2013) in the aftermath of the 2012 amphibole nomenclature report. Ferri-kaersutite was published from Harrow Peaks, Victoria Land, Eastern …

Next most abundant are pyroxene granulite orthogneisses. High-grade meta-arenites are also relatively common. Scarce xenoliths and related megacrysts are composed of anorthoclase, ferrosalite, apatite, magnetite and ilmenite (af–cpx–ap–mt–il suite). Scarce kaersutite megacrysts are thought to be derivative from pegmatitic hornblendites.

Kaersutite-bearing peridotite, clinopyroxenite, gabbro and hornblendite inclusions up to 5 cm in size and megacrysts of kaersutite, andesine and titanomagnetite occur in alkali basalt scoria at Takenotsuji, Iki Island, Japan. New analyses are presented for seven kaersutite-bearing basaltic rocks, three inclusions, three clinopyroxenes and six kaersutites.From …

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Kaersutite. This page provides mineralogical data about Kaersutita. Hide all sections | Show all sections. Unique IdentifiersHide. Mindat ID: 15278 (as Kaersutita) 2129 (as …

The kaersutite root name group minerals are typical for upper mantle rocks. It is common, and even a major constituent of alkali-magmas under high pressures between 25-35 kbar. On surface it can be found as sub mm grains in alkaline volcanic rocks, such as basanites and mugearites, or in alkaline plutonic rocks.

Allison B. Comer The Ohio State University 2000 Approved by: n I Department of Geological Sciences Kaersutite is a titanium-rich hornblende. The name was suggested by …

Kaersutite to pargasite phenocrysts from Tertiary alkali basalts (Rhön, Central European Province, Germany) yield new high-precision 40Ar/39Ar ages of 24.0–24.1 Ma. Major and trace element compositions demonstrate that these high-TiO2 (4–7 wt%) amphiboles are in equilibrium with their host rock. Chemically, these amphibole …

Phenocrysts of black kaersutite (according to the label) in camptonite. Some of them may be titanian augite or magnetite. White clasts are likely vesicles filled with calcite and/or analcime. Specimen on display at the Joe Webb Peoples Museum, Exley Science Center, Wesleyan University, Middletown, Connecticut, USA. Donated by S. Ward Loper.

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Kaersutite is a dark brown to black double chain calcic titanium bearing amphibole mineral with formula: NaCa2(Mg3TiAl)(Si6Al2)O22(OH)2. Ferro-kaersutite is the divalent iron …

bearing kaersutite, the chemical nature of any low-pressure kaersutite, and any distinguishing differences between low-pressure and high-pressure kaersutite. Special attention is given to the O(3) and M(1-3) crys-tallographic sites because they are the most likely sites to record meaningful chemical variations in amphi-bole.

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Kaersutite is found in mafic and ultramafic rocks in a wide variety of petrologic settings. For exam- ple, it is an accessory in ultramafic xenoliths and occurs as megacrysts associated with hawaiites and alkalic basalts in intracontinental areas (Best and Brimhall, 1974; Frey and Prinz, 1978; Wilshire et al., 1985) and intraplate islands ...

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Kaersutite megacrysts are also present at two additional locations, the Grand Canyon and Black Rock Sukt. At the &and Canyon kaersutite, clinopyroxene, rare orhtopyroxene and rare olivine can be found. These megacrysts he associated with inclusions made up of combinations of these phases along with spinei. Black Rock Summit is similar. Plagioclase,

Abstract. STUDIES into the origin of basaltic magmas have led to the belief that the upper mantle contains a hydrous phase, either phlogopite or amphibole, as a source of water and potassium 1–3 ...

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The dark inclusions are ultramafic xenoliths and kaersutite and biotite phenocrysts and/or cognate xenocrysts. Mud covers the dike in the lower-left third of the photo. a.

Name Origin: Named for the locality. Name Pronunciation: Kaersutite + Pronunciation Synonym: ICSD 67049 Oxykaersutite PDF 44-1450 Kaersutite Image Images: …

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The kaersutite root name group minerals are typical for upper mantle rocks. It is common, and even a major constituent of alkali-magmas under high pressures between 25-35 …

kaersutite has carried with it the implication of a high content of TiO 2, generally greater than 5 per cent. This is perhaps unfortunate, as analogous brown hornblendes with 3-5 per cent TiO 2 are probably not uncommon, particularly in basic alkaline rocks.' The analyses in this paper confirm Wilkinson's suggestion, and it is clear that any ...

Kaersutite megacrysts oc- 600 °C between 2 U-traps maintained at - 1 9 5 °C cur in basanitic lavas of late Pleistocene age as in a closed system. The CuO converts H 2 to H20. discrete megacrysts and as veins transecting spinel The non-condensible gases were pumped into a lherzolite nodules. The lherzolites contain both calibrated gas splitter ...

The mineral Kaersutite is a relatively rare,titanium-rich amphibole (~5–12 wt%). The overwhelming majority of kaersutite is found in ultramafic xenoliths or xenocrysts whose host magma is an alkaline basalt (Barton, oral communication, 2017). Kaersutite is a hydrous mineral and has the standardized chemical formula [NaCa 2 (Mg,Fe 2+) 4

3. Pargasite and kaersutite The ideal chemistry of pargasite is NaCa2(Mg4Al)Si6Al2O22(OH)2 while that of kaersutite is NaCa2(Mg4Ti)Si6Al2O23(OH), where Ti need to be ≥ 0.50 (after Leake …

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Chemical and crystal chemical analyses have been performed on a suite of sub-continental, mantle-derived augite samples and their accompanying magmas from a single cinder cone at Dish Hill, California. Miiss techniques have been used to investigate Fe oxidation state, uranium-extraction techniques have been used to determine bulk wt%H20 contents …

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Abstract The paper addresses megacrysts of "bubbly" kaersutite found among mantle xenoliths in the Al Ghab plateau basalts, northwestern Syria. The xenoliths as all xenoliths worldwide are represented by two series: green spinel peridotites (mainly lherzolites) and cross-cutting veins rocks of "black series" (mainly kaersutite …

Kaersutites from Kakanui, New Zealand and from three localities in the southwestern United States have been analyzed for rare gases, water and carbon to …

Kaersutite, Ti-pargasite, and pargasite were found in gabbroic layers of the Horoman ultramafic massif. These amphiboles are regarded as primary minerals which crystallized from the residual liquid, and have a wide composition range in 100Mg/(Mg+Fe+Mn) from 87.5 to 68.2 and in SiO2 content from 41.19 to 44.50%. The TiO2 contents of kaersutite …

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Kaersutite occurs as polycrystalline aggregates, as zoned phenocrysts, or else as interstitial automorphic microcrystals often included in plagioclase. Kaersutite is a product of clinopyroxenes transformation in essexitic gabbros. Fe-kaersutite is automorphic, zoned, with jagged contours. Brown hornblende is associated with clinopyroxene in the ...

Kaersutite and barkevikite are the brown calciferous amphiboles typically encountered in undersaturated alkaline rocks, barkevikite possessing higher Fer+/Mg ratios than kaer-sutite, and Mg(2 atoms. Kaersutite occurs most commonly in analcite-bearing rocks of wide compositional range, and in nepheline-bearing basic rocks. on the other hand, bar

Kaersutite-ilmenite textural relationships in the hornblendites argue for late ilmenite precipitation, simultaneously with Ti phlogopite. By contrast, rutile and ilmenite that are enclosed in pyroxenes and amphibole from Zone-D amphibole-pyroxenites are early crystallizing phases, predating amphibole and contemporaneous to pyroxenes.

Site preference of Nb and Ta in titanian neither be inferred by comparing the re¢ned geo- pargasite and kaersutite metrical parameters with those obtained by mod- elling on the basis of the elastic-strain theory [40], On the basis of their valence and ionic radius because this procedure requires at least three ho- movalent substituents at the ...