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黔东南宰便新元古代镁铁-超镁铁质岩地球化学
王劲松; 周家喜; 杨德智; 范良伍; 丁伟; 龙宣霖
2010
Source Publication矿物学报
Issue2Pages:215-222
Abstract在黔东南从江宰便地区进行地质填图过程中发现一处镁铁-超镁铁质岩体,该岩体属新元古代钙碱质岩系,矿物成分主要为长石、辉石和绿泥石等。其主量成分以高Na2O(5.04%~6.64%),CaO(0.76%~6.67%)和MgO(6.79%~7.88%),低TiO2(0.30%~0.4%),贫K2O(0.10%~0.29%)和P2O5(0.04%~0.05%)为特征。稀土总量ΣREE较高,为83.37×10-6~164.97×10-6,其LREE/HREE和(La/Yb)N变化较大,分别为3.50~7.25和2.90~7.58,表明轻和重稀土分馏较大,(La/Sm)N和(Gd/Yb)N相对较小,分别为1.81~3.19和1.22~1.53,表明轻稀土和重稀土内部分馏较小。在球粒陨石标准化图解上,为轻稀土富集,无Eu、Ce明显异常的平坦型;在原始地幔标准化曲线上出现较为明显的Nb、Ta负异常。微量元素及Y/Nb、Zr/Nb等参数暗示其为过渡-富集型地幔部分熔融的产物。综合研究表明该岩体形成于约800Ma的板内拉张环境,可能与导致Rodinia超大陆裂解的地幔柱有关。
Keyword镁铁-超镁铁质岩体 地球化学 新元古代 从江宰便
Subject Area矿床地球化学
Indexed ByCSCD
Language中文
CSCD IDCSCD:3914307
Citation statistics
Cited Times:7[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/6900
Collection矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
Recommended Citation
GB/T 7714
王劲松,周家喜,杨德智,等. 黔东南宰便新元古代镁铁-超镁铁质岩地球化学[J]. 矿物学报,2010(2):215-222.
APA 王劲松,周家喜,杨德智,范良伍,丁伟,&龙宣霖.(2010).黔东南宰便新元古代镁铁-超镁铁质岩地球化学.矿物学报(2),215-222.
MLA 王劲松,et al."黔东南宰便新元古代镁铁-超镁铁质岩地球化学".矿物学报 .2(2010):215-222.
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