• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Trace element heterogeneity in hydrothermal diopside: Evidence for Ti depletion and Sr-Eu-LREE enrichment during hydrothermal metamorphism of mantle harzburgite
【2h】

Trace element heterogeneity in hydrothermal diopside: Evidence for Ti depletion and Sr-Eu-LREE enrichment during hydrothermal metamorphism of mantle harzburgite

机译：水热透辉石中微量元素的非均质性：地幔菱镁矿热液变质过程中Ti耗竭和sr-Eu-LREE富集的证据

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We discovered a new kind of dyke in the mantle section of the Oman ophiolite composed mainly of diopside that we called diopsidite, although traces of forsterite, anorthite, titanite or andradite may be also observed. The texture and chemical composition, and the relationship between antigorite and diopside or rare forsterite, suggest that they formed by high-T metamorphism of serpentine (antigorite) and are the result of interaction between hydrothermal fluid and percolating magma in the shallow mantle. Chemical data, obtained by electron microprobe and in situ laser ablation coupled to ICP-MS, show large heterogeneities from one sample to another and between diopside crystals in each sample. The trace element patterns are characterised by strong positive anomalies in Sr and Eu and a negative anomaly in Ti. Small-scale heterogeneities reflect the disequilibrium conditions in the dyke formation and show that a relatively Ti-rich- and Al-Eu-Sr-LREE-poor phase may be included in the diopside. The exact nature of this phase is difficult to determine but the Eu negative anomaly, and the low Sr and LREE concentration suggest that it is probably some partially altered, relict protolith mineral.
机译：我们在阿曼蛇绿岩的地幔部分发现了一种新型堤坝，该岩堤主要由透辉石组成，我们称为透辉石，尽管也可能会观察到痕量的镁橄榄石，钙长石，钛矿或红闪石。蛇纹石（蛇纹石）的高T变质作用形成了蛇纹石和透辉石与透辉石或稀有镁橄榄石之间的关系和结构，表明它们是浅层地幔中热液与渗流岩浆相互作用的结果。通过电子探针和结合ICP-MS的原位激光烧蚀获得的化学数据显示，从一个样品到另一个样品，以及每个样品的透辉石晶体之间存在很大的异质性。痕量元素的特征是Sr和Eu的强正异常和Ti的负异常。小规模的异质性反映了堤坝形成中的不平衡条件，并表明透辉石中可能包含相对富钛和贫铝-Eu-Sr-LREE的相。这个阶段的确切性质很难确定，但是Eu负异常，低Sr和LREE浓度表明它可能是部分改变的残留原生岩矿物。

著录项

相似文献

  • 外文文献
  • 中文文献
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号