The major compositions of amphibole in the granites, trace element composition and isotopic composition of granites were effective index to distinguish different metallogenic granitic bodies.

角闪石的化学成分及不同成矿岩体的微量元素和同位素特征是区分区内两类不同成矿岩体的有效判别标志。

The effects of element sulfur on carbon isotopic fractionation of methane have been systematically studied by the simulation experiments of thermal transformated methane from organic matter.

通过热模拟实验，系统研究了单质硫在有机质生成甲烷过程中对其碳同位素分馏的影响。

Based on the carbon and oxygen isotopic composition and rare earth element (REE) patterns, the origin of the Dabaoshan deposit is considered to be related to the sea-floor thermal events.

根据含矿层序中的碳、氧同位素组成和稀土元素(REE)模式，认为大宝山矿床是海底热事件的结果。

Isotopic composition, the percentages of the different isotopes of an element in a given sample of the element, is therefore particularly suitable as an indicator of the sources of the ore.

所谓同位素构成，是指在某一元素的特定样品中该元素不同同位素的百分比率。同位素构成因此特别适合于作为铜矿厂来源的示踪物。

The geochemical indicators, such as mineral, trace element and isotopic geochemistry and organic geochemistry indices, are of the most importance in the study of anoxic environment.

在缺氧环境的研究中，地球化学指标如矿物、微量元素、同位素和有机地球化学指标最为重要。