 | | Journal (article/letter/editorial) | | Natural occurrence of keatite precipitates in UHP clinopyroxene from the Kokchetav Massif: A TEM investigation...Abstract We report the first natural occurrence of keatite, also known as silica K, discovered as a precipitate...(Cpx) within garnet pyroxenite from the Kokchetav Massif, Kazakhstan. High-resolution transmission electron...demonstrate that sub-micrometer and nano-scale keatite precipitates have a definite crystallographic relationship...(100) || keatite (100) and Cpx (010) || keatite (001). Clinopyroxene provides a template for keatite nucleation |  | Hill, Tina R., Konishi, Hiromi, Hobbs, Franklin, Lee, Seungyeol, Xu, Huifang (2019) Precipitates of α-cristobalite and silicate glass in UHP clinopyroxene from a Bohemian Massif eclogite. American Mineralogist, 104 (10) 1402-1415 doi:10.2138/am-2019-6773 | Journal (article/letter/editorial) | | silicate glass in UHP clinopyroxene from a Bohemian Massif eclogite Tina R. Hill1,2, Hiromi Konishi1,†, Franklin...in cores of UHP clinopyroxene from the Bohemian Massif, Czech Republic. SAED patterns and HRTEM images...coesite (Smith 1984) and microdiamond in the Kokchetav Massif (Sobolev and Shatsky 1990) have clearly established...in the Blue Ridge Mountains, U.S.A., the Kontum Massif, central Vietnam, and the Greek Rhodope (Page et... oriented silica in clinopyroxenes of the Kokchetav Massif discovered anomalous low-pressure silica polymorphs |  | | Journal (article/letter/editorial) | | 2011), rarely coesite (Zhang et al., 2005) and keatite (Hill et al., 2013). They sometimes coexist with...from eclogites and biotite gneisses of the Kokchetav Massif with up to 10 and 18 mol% CaEs-endmember,...CaEsendmember in a metagranite from the Dora Maira Massif. The highest contents of the CaEs-endmember (17–23...zircons from the gneisses and eclogites in the Weihai region give five discrete groups of ages (Liu et al., 2010;...Geological map and sample location of the Weihai region (after Liu et al., 2010). 20 H. Xu et al. / |  | | Journal (issue) | | “horsetooth” style hematite from the DraaTafilalet Region, Morocco; specimen of olivine. THE ARKENSTONE,...nearly covered by warm, shallow seas and the Midwest region was blessed with vast deposits of iron oxide. Those... Plus, just a few decades ago, the North Polar region of Russia began to yield superb hematite rosettes...enjoyed leisure time. The hematite crystals from this region are hexagonal with slightly curving prism faces...deposit is a part of the larger San Luis Manganese District that is housed in the Magdalena Mountains, southwest |  | | Book | | degree be analogous to the metamorphism of. another region but it is unique and unrepeatable in the combination...instance, at the eastern margin of the Bohemian Massif, in the Montagne Noire in 12 Lake Superior p)...fault — zone metamorphism (e.g. in the Bohemian Massif ;Skvor, 1968), but the zonation with increasing...to later inclination. For example, the Bohemian Massif, which has been a plate inclined at about S“ to...plutonic basites and ultrabasites. In the Bulfat massif in NE Iraq 19 u © 8 A ie oe ogO, o „u |  | | Journal (article/letter/editorial) | | Pyroxmangite Pyrrhotite Quartz, lechatelierite, keatite, stishovite, christobalite, tridymite Radian barite...the Alpine region, and (3) Mid-Triassic to early Jurassic extension in the extra-Alpine region. Isotope...make a contribution to the cultural heritage of a region and may successfully be used in exploration (Mascaro...two years. The economic potential of a particular region or mining camp can be deduced from the economic...about 50% of them concentrated in the Steelpoort region of the eastern Bushveld Complex. Stratiform deposits | | | Journal (article/letter/editorial) | | Pyroxmangite Pyrrhotite Quartz, lechatelierite, keatite, stishovite, christobalite, tridymite Radian barite...the Alpine region, and (3) Mid-Triassic to early Jurassic extension in the extra-Alpine region. Isotope...make a contribution to the cultural heritage of a region and may successfully be used in exploration (Mascaro...two years. The economic potential of a particular region or mining camp can be deduced from the economic...about 50% of them concentrated in the Steelpoort region of the eastern Bushveld Complex. Stratiform deposits |  | | Book | | wolframite (small black crystals). Kara Oba, Kazakhstan. Width of view is c. 10 cm In identifying a...coccoliths. From plankton sample of the Kimberley region, Australia, kindly provided by CSIRO Tasmania (picture...which the transport medium can move from the source region to the locus of ore precipitation; 5 an energy...(130 t), Mexico (110 t), Uzbekistan (100 t), Kazakhstan (100 t), South Africa (90 t), Brazil (85 t),...crystal faces of the cube {100}. Kondjor, Chabarowsk district, Eastern Siberia, Russia hexagonal with 6/m2/m2/m |
|
