Albitite: Mineral information, data and localities. - mindat.org
网页About Albitite Hide. The term is mostly used for a high- to medium-temperature metasomatic rock dominated by albite, formed by the intense sodic alteration of various rocks. The definition by the IUGS is a granofels with albite as the only major (>75%) constituent (Fettes & Desmons, 2007).
钠长岩 - 百度百科
网页钠长岩（Albitite）是正长岩亚类中的一种特殊岩石，呈灰、灰白或灰红色，主要由钠长石组成，是闪长岩钠闪石化的产物。.
钠长石 - 维基百科，自由的百科全书
网页钠长石 （英語： Albite）是 钠 的 铝硅酸盐 （Na Al Si 3 O 8），为 三斜晶系 的玻璃状 晶体，一般为 无色 、 白色 、 黄色 、 红色 或 黑色，是 长石 的一类。 钠长石为 架状硅酸盐 结构， 比重 2.62， 莫氏硬度 为6 - 6.5，其中 钙长石 的含量少于10%。 钠长石是 斜长石 固溶体 系列的钠质 矿物，在 伟晶岩 和 花岗岩 中最为常见，1815年首先於 瑞典 发现。 参考资料. Mindat （页面存档备份，存于 互联网档案馆） Webmineral （页面存档备份，存于 互联 …
Albitite - an overview | ScienceDirect Topics
网页The extensive academic research that has been applied to well-known, large, but originally enigmatic ore deposits in the Curnamona Craton, Australia, and Areachap Group, South Africa, profoundly benefited potential exploration in high-grade metamorphic gneiss terranes.
Albite - Wikipedia
网页Albite often occurs as fine parallel segregations alternating with pink microcline in perthite as a result of exolution on cooling. There are two variants of albite, which are referred to as 'low albite' and 'high albite'; the latter is also known as 'analbite'.
Mineralogical and geochemical constraints on the origin and …
网页2019年6月1日 · Albitites are characterized by high alkalies (Na 2 O + K 2 O) content coupled with low MgO, CaO, and SiO 2 concentrations relative to host alkali granites. They show inversion of REE patterns (negative slopes for LREE and positive slopes for HREE), enrichment in HFSE (i.e. Zr, Nb, Ta), and strong Eu anomalies.
ALBITITE
网页ALBITITE. Albitite is an uncommon metamorphic rock. The sample below is a slightly pyritic albitite from Thackaringa in the Broken Hill Block of far-western New South Wales, southeastern Australia. It looks like a quartzite, but it's not.
The common origin and alteration history of the hypabyssal and …
网页2019年1月1日 · New data and interpretations are presented for the igneous albitites of the Wadi Tarr area, southern Sinai, Egypt. The albitite masses are isolated in outcrop from any granitic intrusions and have intrusive contacts against the country rocks without any structural control.
A new type U-Th-REE-Nb mineralization related to albitite: A case …
网页2019年12月25日 · The Chachaxiangka deposit is the first albitite-related U-Th-REE-Nb deposit recognized in China and the mineralization can be divided into 3 types: the vein-type, the disseminated veinlet type and breccia type, of which the former 2 are predominant.
Geological, mineralogical, geochemical features and genesis of the ...
网页2001年1月1日 · Geological, geochemical, mineralogical and petrographic evidences suggest that the most probable origin of the albitites can be related to the action of metasomatic processes by circulation of...
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