新疆坡北基性超基性岩带控岩构造特征及成矿专属性

新疆坡北基性，超基性岩带位于塔里木板块东北部北山裂谷带内，受裂谷内部白地洼深断裂控制，走向北东东。该断裂西北侧为地幔隆起区，东南侧为一向南倾斜的地幔斜坡，岩带正好位于幔隆与幔坡之间，据同位素年龄资料及侵位地层时代，该岩带应为中，晚石炭世的产物。岩带至少有４－５个侵入期次的辉长岩、橄榄辉长岩、橄榄单辉岩及单辉橄榄岩构成。基性岩以富铝钙、低碱、镁铁比值较高为特征，超基性岩以低铝钙，贫碱的超镁铁质岩为特     

I—48—(29)《略阳幅》含矿超基性岩的成矿专属性

从含矿超基性岩的岩石学、岩石化学、地球化学特征等方面总结了《略阳幅》含矿超基性岩的岩体特征;从矿体产出特征、成矿控制因素方面总结了岩体含矿特征,指出了主要矿产的找矿方向。在此基础上探讨了含矿超基性岩的成矿专属性。     

Geochemical Characteristics of the Jinjiazhuang Ultrabasic Rock—Type Gold Deposit in Chicheng County,Hebei Province

The Jinjiazhuang gold deposit occurs in the Zhangjiakou gold field,Northwest Hebei.The ore bodies are mostly hosted in Xiaozhangjiakou ultrabasic rocks dominated by diopsidite.Electron microprobe analyses indicate that the deposit is characterized by the enrichment of some platinum group elements in principal metallic minerals such as chalcopyrite,galena,sphalerite and pyrite,and the presence of millerite,Stable isotope studies show that carbon,sulfur and most of the metallogenic elements were probably derived largely from the host Xiaozhangjiakou ultrabasic rocks and that it is possible that the ore-forming fluid was predominted by meteoric water.     

川西北壤塘金成矿带中、基性岩脉及其与金成矿作用的关系

在对川西北壤塘金成矿带内中－基性岩脉（闪长岩、闪长玢岩、煌斑岩）时空分布及岩相学特征调查的基础上，结合典型矿床成矿地质条件、成矿规律的研究，表明壤塘金成矿带内的中－基性岩脉与金成矿作用在时间、空间及成因上具有十分密切的关系，中－基性岩脉为金成矿作用提供了成矿物质及赋矿空间。     

内蒙古狼山北侧中元古代变基性岩特征及其成矿意义

内蒙古狼山北侧霍各乞矿区及外围中元古代地层中存在顺层产出的绿片岩、角闪石岩等变基性岩。长期以来,该类岩石的原岩时代不清,对其性质和成矿意义缺乏研究。文章分析了变基性岩产出的大地构造环境,根据Sm-Nd同位素年龄及野外产状,认为其原岩是中元古代同沉积期形成的火山岩。论述了其岩石化学待征、稀土元素组成特征,初步分析了其在中元古代喷气沉积成矿过程中所起的作用。     

超基性岩矿物化学特征与成矿关系讨论

The most productive chromite ore deposits are formed by crystallizing from chromite-ore magmas under definite physico-chemical conditions. The formation of chromite ore is controlled mainly by the degree of differentiation of ultrabasic magma. How to diagnose uitrabasic magmatie differentiation is key to the understanding of the mechanism of formation of chromite ore. It is considered that chromite ore is derived from ulttabasic rocks. The rock-forming minerals include olivine, pyroxene and spinel. The minerals are well homomorphous minerals. The contents of major chemical elements in these minerals show little variation. On the contrary in those ultrubasie rocks which show no association with chromite ore deposits the contents of the elements vary over a wide range. Abundant data available.indicate that chromite ore deposits arc derived from chrore.ire-ore magmas resulting from the transport and accumulation of chromic elements. Since the transport and accumulation of chromic elements follows the statistical law,we must study the mechanism of formation of ehromite ore from the statistical point of view. If chromite ore is formed from spinel under the action of gravitation o.r other dynamic actions, we must elucidate the mechanism of formation of chromite ore from the dynamic viewpoint.     

青海与基性—超基性岩有关的玉石矿

青海省与基性－超基性岩有关的玉石矿，主要包括两类；钙铝榴石质玉和蛇纹石质玉。根据笔者的调查，以及有关的信息资料，本文着重对钙铝榴石质玉的基本特征作一介绍。     

贵金属配分模式及地质应用

通过与ＲＥＥ模式对比，介绍了贵金属配分模式的构筑方法和组成参数；并对包括地幔岩石、科马提岩和玄武岩在内的各种基性、超基性岩石的特性ＰＧＥ＋Ａｕ配分模式和贵金属分馏机制进行了综述。     

江西超基性岩的分布,地质特征及成矿特点

本文系统分析了江西超基性岩资料，根据江西超基性岩的时空分布，产出大地构造环境，岩石化学特征，将其分为６个岩带，并对有关成矿特点进行了阐述。     

西藏罗布莎超基性岩及铬铁矿的成岩成矿特征

Ｐ波波速测定结果表明，青藏地壳５５－６０ｋｍ左右和上地幔１３８ｋｍ处各有一个低速层。如于古生代发育于印支期的雅鲁藏布江断裂，倾向南，切穿了下地壳，使菲霍西错开６－２０ｋｍ，两侧地壳厚度均在７０ｋｍ左右。它控制着中新生代沉积，也控制着超基性岩体的形成与分布。     

镁质超基性岩体中铬铁矿的成矿规律

根据物质组分的差异，基性超基性岩可以划分为镁质超基性岩，镁铁质，铁质，富铁质基性超基性岩，碱性超基性岩和煌班岩六大类，它们的成矿忖属性各异。镁质超基性岩体可以区分为纯橄榄岩型，纯橄榄岩－方辉橄榄岩型和方辉橄榄岩型三种建造类型，以铬铁矿为其成矿专属性。     

超基性岩含铬丰度值的统计特征与成矿关系

铬铁矿是我国工业建设中的短缺矿种。建国三十年来地质工作者在铬矿找矿上花费了不少的人力和财力，但距国家的需要还有较大的差距。出现这种结果笔者认为：前人在寻找铬矿过程中主要从超基性岩的岩石特征，镁铁比值和分异程度着手，很少考虑铬元