排序方式： 共有18条查询结果，搜索用时 16 毫秒
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广东从化石岭碱性杂岩的岩石学特征及其地质意义 总被引：7，自引：2，他引：5
对广东从化石岭碱性杂岩体进行了１：１万地质调查和填图,并进行了详细的岩石力学研究。其结果表明：杂岩体由霞石角闪石正长岩、角闪石正长岩、墨云母正长岩等岩性组成,为Ａ－型花岗岩的分异结晶作用所形成,产于板内引张构造环境,与深大断裂有关。岩体本身已构成霞石正长岩矿床,具有较高的工业利用和经济价值。 相似文献
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粤东北嵩溪银锑矿床地质地球化学初步研究 总被引：5，自引：0，他引：5
粤东北嵩溪银锑矿床地质地球化学初步研究肖振宇郑庆年（广东有色金属地质勘查院，广州５１００８０）陈繁荣张湖（中国科学院广州地球化学研究所，广州５１０６４０）关键词地质地球化学银锑矿床嵩溪嵩溪银锑矿床发现于粤东北地区，有嵩溪、黄沙塘等矿床和梅子坑、仙客社... 相似文献
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江西银山多金属矿床发育南北不对称的矿化与蚀变分带。矿区南部的分带性较完整,从九区Ｃｕ（Ａｕ）矿化带往南依次为银山区Ｃｕ－Ｐｂ－Ｚｎ矿化带、含银Ｐｂ－Ｚｎ矿化带和南山区Ｐｂ－Ａｇ矿化带,形成了相应的矿物共生组合及演化序列。矿化作用发生在成矿热液的缓慢演化过程中。九区Ｃｕ（Ａｕ）矿化带北侧的九区Ｚｎ－Ｐｂ矿化带,是在物理化学条件急剧变化的热液体系中,各种矿物在溶液浓度同时达到饱和或过饱和后快速沉淀的产 相似文献
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通过控矿地层和矿床中岩石赋存的有机质研究和对比后指出,粤东北下侏罗统嵩灵组黑色岩系建造是一套富含生物及有机质的含矿建造。沥青、干酪根和焦沥青是构成围岩与矿化岩石中主要的有机质显微组分。有机质热演化处于高成熟一过成熟阶段。这套黑色岩系控矿围岩中有机碳与银、锑等成矿元素具有较好的正相关关系。黑色岩系含矿建造中的有机碳对形成银、锑矿化起了一定的控制作用。有机质的镜质体反射率测定表明,嵩溪银锑矿属低温(150～170 ℃)浅层热液改造型矿床。有机质热成熟异常区是一种特殊的指示矿化作用的找矿勘查标志。 相似文献
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Organic geochemistry and comparisons of characteristics of the organic matter in wall rocks of the ore-controlling strata and ores of the Lower Jurassic Songling black shale formation and the related Songxi silver-antimony deposit of northeastern Guangdong have been studied in this paper.The results show that the Lower Jurassic Songling shale formation is a suite of biologic-rich and organic-rich ore-bearing marine sedimentary rocks.Micro-components of the organic matter in the Songling black shale formation consists primarily of algae,amorphous marine kerogen,solid bitument,and pyrobitument.The thermal evolution of organic matter is at the over-maturity stage.There is a general positive correlation between total organic carbon(CO)and metallogenetic elements such as Ag and Sb in the black shale formation.Organic matter in the host rocks in the Songxi ore deposit played a role in controlling the silver-antimony depositing environment during the forming process of the black shale ore-bearing formation.In the absence of vitrinite,the relative level of thermal maturity calculated by solid bitument reflectance indicates that the ore-forming temperatute of the Songxi silver-antimony deposit was about 150-170℃,which was considered as an epithermally reworked ore deposit.The roles of organic matter in the formation of the Sonxi ore deposit are a primitive accumulation of the metallogenetic elements(Ag,Sb) in the sea-water cycle system for ore source and a concentration of metals by ion exchange of chelation as well as reductionn of the oxidzed metals. 相似文献
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