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首页> 外文期刊>Contributions to Mineralogy and Petrology >Highly ordered antigorite from Cerro del Almirez HP–HT serpentinites, SE Spain
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Highly ordered antigorite from Cerro del Almirez HP–HT serpentinites, SE Spain

机译：来自西班牙SE Cerro del Almirez HP–HT蛇纹岩的高度订购的锑矿

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摘要

The Cerro del Almirez ultramafic massif offers an example of high pressure and high temperature antigorite serpentinites. A sharp antigorite-out isograd separates them from Chl-harzburgites, consisting of olivine + enstatite + chlorite. Antigorite is characterized by aluminium contents as high as 4 wt.% Al2O3. The microstructural study shows that, prior to the transformation, antigorite is exceptionally ordered and consists of the polysome m = 17. No polysomatic defect occurs in antigorite forming most of the Cerro del Almirez serpentinites. Close to the antigorite-out isograd, limited disorder features may occur, mainly as (001) twins, reaction rims and reduction of m down to 14–15. Here, local recrystallization phenomena lead to sporadic growth of large antigorite and chlorite crystals.
机译：Cerro del Almirez超镁铁质断层岩是高压高温蛇纹石蛇纹岩的一个例子。尖锐的防蛇纹石等当污物将它们与由橄榄石+顽辉石+亚氯酸盐组成的Chl-harzburgites分离。防蛇纹石的特征在于铝含量高达4 wt。％Al 2 O 3 。显微组织研究表明，在转变之前，反蛇纹石是异常有序的，并且由多核小体m = 17组成。在形成大多数塞罗德尔阿尔米雷斯蛇纹石的反蛇纹石中未发生多体缺陷。接近抗螨虫的等速物，可能会出现有限的紊乱特征，主要表现为（001）双胞胎，反应边缘和m降低至14-15。在这里，局部再结晶现象导致大型的蛇纹石和亚氯酸盐晶体的零星生长。

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