论文部分内容阅读
泰米尔纳德磁铁石英岩产在前寒武纪高级麻粒岩区,它们与酸性到基性麻粒岩、各种片麻岩、纯橄榄岩、橄榄岩、伟晶岩以及粗玄岩脉伴生。主要与辉石麻粒岩密切伴生。研究磁铁石英岩及其伴生辉石麻粒岩中磁铁矿铁族元素的分布,其目的在于了解磁铁石英岩的成因。表Ⅰ示出磁铁石英岩的磁铁矿和辉石麻粒岩的磁铁矿所测定的痕量元素浓度。痕量元素比率的变动范围、样品和上部岩石圈中元素的平均百分数列入表Ⅱ,样品的标准差和变化值也列入表Ⅱ。
Tamilnad magnetite is produced in the Precambrian high-grade granulite area, which is associated with acidic to basic granulite, various gneiss, dunite, peridotite, pegmatite, Associated. Mainly associated with pyroxene granulite. Studying the distribution of magnetite iron elements in magnetite quartz and its associated pyroxene granulites, the purpose of which is to understand the genesis of magnetite quartzite. Table I shows the concentrations of trace elements as measured by the magnetite of pyroxene quartz and pyroxene granulite. The range of trace element ratios, the average percentages of the elements in the sample and the upper lithosphere are given in Table II, and the standard deviations and variability of the samples are also given in Table II.