First find of ferropseudobrookite in quartz from Napier Complex, East Antarctica.
First find of ferropseudobrookite in quartz from Napier Complex, East Antarctica.
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首次在南极洲东部纳皮尔杂岩的石英中发现铁伪板钛矿。
DOI：
10.1127/0935-1221/2013/0025-2256
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发表时间：
2013
影响因子：
2.1
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Miyake;Y.;& Hokada;T.
铁伪板钛矿溶出棒约为Mg2+0.11Fe2+0.70Al3+0.04Fe3+0.34Ti4+1.81O5，空间群Cmcm，a约0.98 nm，b约0.37 nm，约1.00 nm，首次在含石榴石-斜辉石石英长片麻岩的石英中报道，南极洲东部的纳皮尔综合体。铁伪板钛矿棒的伸长方向是轴，平行于低石英的<101>或<111>。此外，这些棒沿着石英轴几乎具有六重对称性。出溶体的形成必定是片麻岩冷却的结果，并且出溶体发生在高石英场中。目前的出溶现象表明，石英不仅可以溶解Ti，还可以溶解Fe2+和Fe3+，并且片麻岩在超高温峰值变质条件下含有Fe2+离子。
Ferropseudobrookite exsolution rods, approximately Mg2+0.11Fe2+0.70Al3+0.04Fe3+0.34Ti4+1.81O5, space groupCmcmwithaabout 0.98 nm,babout 0.37 nm,cabout 1.00 nm, are first reported in quartz from a garnet-orthopyroxene-bearing quartzofeldspathic gneiss, Napier Complex, East Antarctica. The elongated direction of ferropseudobrookite rods is thebaxis and is parallel to either the <101> or <111> of low-quartz. Moreover these rods have almost six-fold symmetry along thecaxis of quartz. The formation of the exsolution must result from the cooling of the gneiss and the exsolution took place in the high-quartz field. The present exsolution phenomenon suggests that quartz can dissolve not only Ti but also Fe2+and Fe3+and that the gneiss contains Fe2+ion under the ultrahigh-temperature peak metamorphic conditions.