摘要
超基性岩和基性岩中金原子可能以类质同像取代铁镁矿物中的铁镁原子,金原子与铁镁原子之间的这种类质同像置换使得金含量与铁镁氧化物关系密切。华北地块北缘作为我国最重要的金成矿区具有代表性的研究意义。深源包体可以排除外来壳源物质混染的影响,因此对深源包体铁镁氧化物与金含量进行回归分析旨在将铁镁氧化物与金含量的的关系由定性推向定量,以期对金元素的成矿特性获得些许新的认识。回归分析表明,华北地块北缘深源包体金含量与镁氧化物的线性关系较之与铁氧化物线性关系明显,但均呈负相关,推测是受不同程度熔融的影响并且金元素以气态形式从地核迁移入地幔,使得金原子与铁镁原子之间的类质同像取代现象不明显。
In ultrabasite and basite,Au、Fe、Mg atoms are isomorphism.Iron,magnesium oxides are closely related to the content of gold because Au atoms can be isomorphically replaced by Fe、Mg atoms.Due to the representative significance of deep-seated inclusions from north margin of North China platform.We apply regression analysis to the existent data from deep-seated inclusions of north margin of Huabei plate in order to gain some insights and an exact function between gold content and Iron,magnesium oxide content.Results show that gold content is much more dependent on magnesium oxide than iron oxide.However,gold content decreases as either oxide content increases.We surmise that gold element may go up into the mantle in terms of gas due to certain melt,which inhibits the isomorphic replacement between gold atoms and iron,magnesium atoms.
出处
《化工矿产地质》
CAS
2010年第4期206-210,共5页
Geology of Chemical Minerals
关键词
华北地块
深源包体
金
氧化物
回归分析
north China platform
deep-seated inclusions
gold
oxide
regression analysis
