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Members of the olivine group are essentially rock‐forming minerals characterized by the presence of magnesium (Mg) in rocks poor in silica, or by iron (Fe) in rocks that are silica rich. 0000018263 00000 n
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Als Olivingruppe (kurz: der Olivin) wird eine Gruppe von Mineralen ähnlicher Zusammensetzung aus der Mineralklasse der Silikate und Germanate bezeichnet. %����
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Minerals of the olivine group are abundant in the earth, the moon, and the stony meteorites. 0000000016 00000 n
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Title: 09Olivine Author: SMYTH.JOE Created Date: 3/6/2002 8:52:58 AM 0000009854 00000 n
The members of the olivine group crystallize with orthorhombic symmetry, the structures consisting of independent SiO 4 tetrahedra linked by divalent cations in six-fold coordination. 0000194369 00000 n
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Chrysolite was renamed, olivine, in 1789 by Abraham Gottlieb Werner for the usual olive green color of this mineral (N.B. 0000017028 00000 n
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These varieties of rocks are maximum not unusual at divergent plate limitations and at hot spots within the centers of tectonic plates. They are usually the first silicate mineral to crystallize from ultramafic and mafic magmas. 0000202741 00000 n
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[1] Olivine has a totally high crystallization temperature as compared to other minerals. stream
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The second member of the group was named tephroite in 1823 by Johann Friedrich August Breithaupt. 0000006443 00000 n
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Most olivine found at Earth’s floor is in dark-colored igneous rocks. The common Mg-dominant member of the group was re-named, forsterite, by Serve-Dieu Abailard "Armand" Lévy in 1824. 0000003047 00000 n
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Minerals explained 50 Olivine Group R.J. King Tewkesbury, Gloucestershire, UK Members of the olivine group are essentially rock-forming minerals characterized by the presence of magnesium (Mg) in rocks poor in silica, or by iron (Fe) in rocks that are silica rich. In the (Mg, Fe)-olivines there is complete solid solution between Mg 2 SiO 4 (forsterite) and Fe 2 SiO 4 (fayalite); similarly the (Fe, Mn)-olivines form a continuous series. %PDF-1.2
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(2004), and Kuebler et al. 0000015778 00000 n
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During the slow cooling of a magma, crystals of olivine may … 13 0 obj
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chrysolite has a similar etymology.) 0000007239 00000 n
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It is generally accepted that the Mg‐rich olivines are drawn from the upper reaches of the Upper Mantle at depths from the surface of approximately 550 km. 0000208349 00000 n
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Definitionsgemäß gehören dieser Gruppe Inselsilikate mit der allgemeinen Zusammensetzung A22+[SiO4] an, wobei A als Platzhalter für die chemischen Elemente Blei, Calcium, Cobalt, Eisen, Magnesium, Mangan und Nickel dient. /Height 111
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(1986), Wang et al. That makes it one of the first minerals to crystallize from a magma. /ColorSpace /DeviceRGB
Raman spectroscopic study of olivine-group minerals 103 Forsterite-fayalite series The relationships between the Mg#[= Mg/(Mg + Fe2+)] value and the Raman frequency shifts of olivine have been discussed by Guyot et al. startxref
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H�m��N�0�� ��c'�`�q�A�;��n�61����vYAӔ(��/���! It usually crystallizes inside the presence of plagioclase and pyroxene to form gabbro or basalt. 0000004144 00000 n
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