...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Asian earth sciences >Tin-carrier minerals in metaluminous granites of the western Nanling Range (southern China): Constraints on processes of tin mineralization in oxidized granites
【24h】

Tin-carrier minerals in metaluminous granites of the western Nanling Range (southern China): Constraints on processes of tin mineralization in oxidized granites

机译：南岭山脉西部（中国南部）的金属花岗岩中的锡载体矿物：氧化花岗岩中锡矿化过程的约束

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Huashan, Guposhan and Qitianling are three similar and representative metaluminous A-type tin granites in the western Nanling Range, China. They all have a high oxidization state with magnetite as the dominant Fe-Ti oxide. This study presents an understanding of systematic mineralogy of Sn-bearing minerals (biotite, titanite, magnetite and cassiterite) in the three granites. Biotite has an annite composition and both electron-microprobe and LA-ICP-MS analyses indicate trace amounts of tin in biotite (approximately 100-20 ppm). Chloritization of biotite is accompanied by formation of Sn-rich rutile and cassiterite. Titanite has a long history of crystallization from the early-magmatic stage through the late-magmatic stage to the hydrothermal stage. Owing to its solid-solution relationship with malayaite (CaSnSiO_5), titanite always contains tin to various extents. Early-magmatic titanite contains about 0.5 wt.% SnO_2, while the late-magmatic titanite is markedly enriched in tin (on average 14.8 and 3.4 SnO_2 in titanite from the Qitianling and Huashan granites, respectively). Magnetite grains typically display a trellis structure with ilmenite lamellae, where microinclusions of cassiterite (<1 μm in size) are present. This is likely consistent with features of the "oxy-exsolution" process of Sn-bearing titanomagnetite precursor. Cassiterite may be observed as late-magmatic phase, but most commonly appears as an alteration product of other primary minerals. All tin-bearing minerals in the three granites record a complete process of tin mineralization in granite. The features of tin in primary biotite, titanite and magnetite reflect an initial enrichment during the early stage of magmatic crystallization of the Huashan, Guposhan and Qitianling granites. Association of interstitial Sn-titanite and cassiterite suggests further tin enrichment related to fractional crystallization of granitic magmas. Fluids and alteration of primary minerals play an important role in the leaching, concentration and transportation of Sn during hydrothermal processes, which favors vein-type Sn mineralization.
机译：华山，古坡山和祁天岭是中国南岭山脉西部的三种相似且具有代表性的金属A型锡花岗岩。它们都具有高氧化态，磁铁矿为主要的Fe-Ti氧化物。这项研究提出了对三种花岗岩中含锡矿物（黑云母，钛矿，磁铁矿和锡石）的系统矿物学的认识。黑云母具有环形铁矿组成，电子探针和LA-ICP-MS分析均显示黑云母中痕量锡（约100-20 ppm）。黑云母的绿化伴随着富锡金红石和锡石的形成。从早期岩浆阶段到晚期岩浆阶段到热液阶段，钛矿都有悠久的结晶历史。由于其与Malayaite（CaSnSiO_5）呈固溶关系，因此钛铁矿总是含有不同程度的锡。早岩浆钛矿含有约0.5 wt。％的SnO_2，而晚岩浆钛矿中的锡含量显着增加（分别来自祁天岭和华山花岗岩的钛矿中锡的平均含量分别为14.8和3.4）。磁铁矿晶粒通常具有钛铁矿片状的网格结构，其中存在锡铁矿（尺寸<1μm）的微夹杂物。这很可能与含锡钛磁铁矿前体的“脱氧”过程的特征一致。锡石可能在岩浆后期被观察到，但最常见的是其他主要矿物的蚀变产物。三个花岗岩中的所有含锡矿物记录了花岗岩中锡矿化的完整过程。原始黑云母，钛矿和磁铁矿中锡的特征反映了华山，古坡山和祁天岭花岗岩岩浆结晶早期的初始富集。间隙锡-钛铁矿和锡石的关联表明，进一步的富锡与花岗岩岩浆的分级结晶有关。流体和主要矿物的改变在热液过程中锡的浸出，浓缩和运输中起重要作用，这有利于脉型锡矿化。

著录项

  • 来源
    《Journal of Asian earth sciences》 |2013年第25期|361-372|共12页
  • 作者

    Ru Cheng Wang; Lei Xie; Jun Chen; Apeng Yu; Lubin Wang; Jianjun Lu; Jinchu Zhu;

  • 作者单位

    State Key Laboratory for Mineral Deposits Research. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;

    State Key Laboratory for Mineral Deposits Research. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;

    State Key Laboratory for Mineral Deposits Research. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;

    State Key Laboratory for Mineral Deposits Research. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;

    State Key Laboratory for Mineral Deposits Research. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;

    State Key Laboratory for Mineral Deposits Research. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;

    State Key Laboratory for Mineral Deposits Research. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biotite; Titanite; Magnetite; Cassiterite; Tin granites; Huashan; Guposhan; Qitianling; Nanling Range; China;

    机译：bio替特;Titan I特;magnetite;CAS site日特;tin granites;hu阿山;GU朴善;Q i天灵;NaN令range;China;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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