新疆哈密黄山镁铁超镁铁杂岩体含矿(Ni)性数理统计分析

Mathematical Analysis of Nickel Content in the Mafic-Ultramafic Rock Complex at Huangshan,near Hami City,Xinjiang

本文应用数理统计方法对黄山岩体各类岩石中成矿元素分布状态、元素间相关性及其组合特征进行了讨论,从而揭示了该杂岩体中成矿元素非正态分布有利于成矿、橄榄石等富镁矿物含量增多而斜长石含量减少是含矿性良好的标志及Cr_2O_3和AlO_3间的相关性可作为镁铁超镁铁岩成铬矿还是成硫化铜镍矿床的判据,镍和Al_2O_3的相斥关系是含镍矿标志之一,Al_2O_3对镍富集成矿起着决定性的作用。

In this paper authors report their further study on the distributionstate of Cu, Co, Ni, S as metallogenic elements, the corelationship betweenelements and the comprehensive characterisitic in Ni-content mafic-ultra- mafic rock complex at the coppernickel sulfide deposit of Huangshan, nearHami city, Xinjiang, by using mathematical analysis. The result of theseanalyses show that this rock complex in which metallogenic elements arenonormal distribution is favourable to the formation of copper-nickalsulfide deposit. Better Ni-content is marked bs the increase of the contentof melanes (i .e .olivine etc.) and the decsease of the content of plagiodase.The corelationship between Cr_2O_3 abd Al_2O_3 can be used to determinewhether mafic-ultramafic rocks could form chrome deposit or coppernickelsulfide deposit. The opposition between Ni and Al_2O_3 could be regardedas a mark of bearing Ni ores. Al_O_3 has a decisive action on the richnessand ore-forming of nickel.