珍珠岩矿床铯异常的发现及初步研究

近年来,我们对东南沿海大量火山非金属矿床作了较为广泛、深入的研究,在国内首次发现了珍珠岩中的铯矿化.铯最高含量可达210ppm,达到或接近伟晶岩型铯矿床的工业品位(200ppm).含铯珍珠岩的成矿地质背景东南沿海是我国珍珠岩资源比较丰富的地区之一.多数矿床分布在江—绍断裂以东的浙—闽—粤东沿海中生代火山喷发带,且     

内蒙古查干诺尔地区HF-3号航空放射性异常铀矿化的基本特征

HF-3号航放异常位于内蒙古查干诺尔乡附近，其大地构造位置处于二连盆地苏尼特隆起与滕格尔坳陷的过渡地带。异常地段出露的地层为新近系的中新统汗诺坝组，经浅井工程的重新揭露，初步查明该异常浅部铀矿化具多层性、连续性、稳定性及原生和后生再富集等复式成因特征，基本上掌握了其矿化的控制因素及形成条件，深化了对该异常的认识与评价。     

内蒙古虎拉林金矿矿化富集规律和找矿远景评价

通过对虎拉林金矿构造控矿规律研究，认为矿区占绝对优势的浸染状矿化主要受角砾岩筒构造控制，矿化不均匀，矿体形态不规则；通过分析该角砾岩筒内角砾岩的特点，结合一般浅成、半浅成角砾岩筒的垂向分带规律，推测该角砾岩筒已剥蚀到了中下部。采用因子分析的方法，确定了该金矿的原生晕轴向分带规律，矿区深部存在着强尾晕异常叠加前缘晕异常的现象，推测深部存在隐伏矿化。由此可见虎拉林金矿总体剥蚀程度较大，但深部还存在着一定的找矿远景。     

脑膜瘤旁巨型矿化灶矿物成分分析

脑膜瘤旁复发性巨大矿化灶是罕见的病例,对其中矿物成分的分析可能会对肿瘤复发病因的研究提供辅助信息。本文利用X射线物相分析、红外光谱分析、环境扫描电镜观察和高分辨透射电镜观察分析等方法,对该矿化灶样品的矿物成分进行了分析。结果表明,该矿化灶的矿物颗粒大小统计值约为4.3nm,主要成分为碳酸磷灰石,笔者推测可能还含有少量不定形的磷酸钙系列其他矿物。     

江西邹家山铀矿绿泥石形成温度及其成矿关系

本文采用电子探针分析技术，对产于邹家山火山岩型铀矿床深部的绿泥石进行蚀变特征、化学组成、形成环境研究，并初步探讨该矿床中的绿泥石的形成环境与铀矿化关系。指出绿泥石的形成温度为217.64-295.30℃。矿脉中与铀矿物共生的绿泥石主要是鲕绿泥石，而围岩中则是蠕绿泥石和铁镁绿泥石。含矿溶液沉淀时是一个还原环境，绿泥石不仅活化了火山岩中的铀，还为铀矿化提供了良好的沉淀环境。     

华北某含铂铜镍硫化矿床的两期铂矿化

Two stages of platinum mineralization, i.e., the main stage contemporaneous with Cu-Ni sulfide ores and the hydrothermal stage are recognizable in the platinum-bearing Cu-Ni sulfide deposit under investigation. In addition to antimonian michenerite-testibio palladite which occur in both stages, sperrylite, cooperite and osmian laurite are formed in the first stage and the presence of sudbryite and nicleoan sudbryite characterizes the second. Statistics shows different correlations among Cu, Ni, Pt, and Pd in the two stages.Being rich in Ni, the main stage exhibits a close correlation between Pt-, Pd-mineralization and Cu, with roughly equal tenors of Pt and Pd. During the second stage Cu is enriched, accompanied by increasingly strong mineralization of Pd while the mineralization of Pt is developed to a less extent and closely related with Ni. In the first stage the correlation between Pt and Os, Ru, Ir is notable, while that between Pd and Rh is intimate. According to occurrence, texture and structure of the sulfide ores, the main platinum mineralization is considered to have taken place through sulfide segregationinjection during magmatie stage. The second platinum mineralization is a typical hydrothermal process related with basic-ultrabasic magma.