荣成夏庄地区虎头石单元细粒二长花岗岩用于C60以上混凝土骨料分析

混凝土骨料在混凝土的工作性能及耐久性能等诸多方面起着非常重要的影响,已越来越被人们所重视。该文利用山东省荣成市夏庄地域伟德山序列虎头石单元细粒二长花岗岩为研讨对象,对该地区二长花岗岩体作为混凝土骨料的适宜性进行了评估研究。经过野外实地考察及大批的实验测试对虎头石单元花岗岩进行了岩石学、岩相学、岩石化学及岩石材质等多方面探讨,认为该地区石料质量较好,所测各项指标全部可以满足C60混凝土技术要求,确定其适宜于用作C60以上混凝土骨料,同时对下一步开采利用提出了意见和建议。     

北秦岭海西期花岗岩的地质特征及其就位机制

北秦岭造山带狮子坪地区出露部分海西期花岗深成岩体。通过１：５万狮子坪幅区调，将其划分为两个单元归并为一个超单元。本文从岩体地质、岩石学、岩石化学和地球化学等方面对其成因类型和构造环境进行研究，并对岩体变形组构进行分析，探讨岩体的就位机制。     

东秦岭鱼池正长岩体岩石地球化学特征及稀有金属元素、稀土元素矿化

河南方城鱼池正长岩体属于东秦岭北部富碱侵入岩,为本区出露规模最大的碱性岩体,迄今研究较为薄弱。通过对鱼池正长岩体的主量、稀土和微量元素岩石地球化学成分的系统分析和综合研究,探讨了该岩体岩浆源区特征、构造环境和该地区正长岩体稀有金属、稀土元素含矿性。鱼池正长岩体w(SiO₂)为57.35%~61.38%,富碱,高Al,贫Ca、Mg和Ti,A/CNK为0.95~1.07,[JP2]属于过铝质碱性岩。岩石稀土元素总量较高,(La/Yb)_N比值为25.86~35.48,强烈富集轻稀土元素,轻、重稀土元素分馏明显,δEu值为0.48~0.63,具中等负Eu异常。富集大离子亲石元素、相对亏损高场强元素。由此表明:鱼池正长岩体的岩浆物质主要来源于地幔,后经过大量的壳源物质的混染,且岩体形成于板内拉张环境。另外该地区正长岩体w(ZrO₂)为0.039%~0.174%,LREEO质量分数为0.026%~0.15%,显示了良好的Zr和LREE等稀有金属元素、稀土元素的矿化信息,具有巨大的成矿潜力。      

东准噶尔卡拉麦里地区黄羊山岩体岩石学特征

在前人研究基础上,对黄羊山岩体取得了新的认识:萨北岩体和苏吉泉岩体只是黄羊山岩体的一个组成部分,并非单独岩体.黄羊山岩体寄主岩石划分为中粒黑云母碱长花岗岩、中粒角闪石碱长花岗岩、中粒钠铁闪石碱长花岗岩、中细粒钠铁闪石碱长花岗岩、细粒黑云母碱长花岗岩和细粒混合花岗岩(含石墨)6个单元.岩石学及矿物特征表明,岩体有从黑云母碱长花岗岩向钠铁闪石碱长花岗岩演化的趋势,可能是幔源重熔分异的碱性花岗岩(A型花岗岩),而闪长质微细粒包体及大量发育的闪长(玢)岩脉和辉绿(玢)岩脉提供了有力的佐证,初步研究认为黄羊山岩体形成于后碰撞张性环境,其就位与卡拉麦里断裂有关,其形成和演化标志了准噶尔地区显生宙幔源岩浆活动及其分异产物导致大陆地壳垂向生长过程.     

东平大洼石灰岩矿山土地复垦适宜性评价

《土地复垦方案编制规程》发布后,如何依照规范进行正确的土地复垦适宜性评价是土地复垦方案编制过程中至关重要的环节,以大洼石灰岩矿山为例,按照评价原则、评价依据、评价单元、评价方法及基本流程,确定初步复垦方向、土地复垦适宜性等级评定的评价流程,进行土地复垦适宜性评价,并最终确定各评价单元的复垦利用方向。该研究对类似矿山土地复垦适宜性评价具有一定的参考价值。     

辽西察哈尔山和小欧力营超单元花岗岩地质特征

辽西务欢池-铁匠各冷地区中生代—晚古生代花岗岩岩体可划分为十一个填图单元,据岩体形成时间、侵入接触关系、岩体及岩石组构特征,可把这十一个花岗岩填图单元归并为小欧力营和察哈尔山两个超单元。两个超单元主体岩性为钾长花岗岩和二长花岗岩,岩体成因类型属于壳幔混源型,二者岩源不同。小欧力营超单元同位素年龄为269Ma,侵入时代为早二叠纪,为强力就位;察哈尔山超单元同位素年龄为190Ma,侵位时代为早侏罗纪,岩石糜棱岩化明显,属于被动就位     

首批国家级绿色矿山——湖州新开元碎石有限公司

正湖州新开元碎石有限公司隶属于上海建工集团股份有限公司,成立于1995年,企业注册资金1.52亿元人民币,年生产规模400万吨。公司产品主要有高速铁路特级道砟、高标号管桩优质骨料、高性能混凝土专用精品骨料和机制砂四大类,产品入选为湖州市名牌产品,获得全国砂石骨料大赛一等奖,为长三角地区重点工程提供优质骨料,如上海中心(高标号)、江南布衣总部工程(清水混凝土)等。     

首批国家级绿色矿山——湖州新开元碎石有限公司

正湖州新开元碎石有限公司隶属于上海建工集团股份有限公司,成立于1995年,企业注册资金1.52亿元人民币,年生产规模400万吨。公司产品主要有高速铁路特级道砟、高标号管桩优质骨料、高性能混凝土专用精品骨料和机制砂四大类,产品入选为湖州市名牌产品,获得全国砂石骨料大赛一等奖,为长三角地区重点工程提供优质骨料,如上海中心(高标号)、江南布衣总部工程(清水混凝土)等。     

鄂拉山东北段都龙超单元地质特征

都龙超单元是一个大型中酸性复式岩体,具成分和结构演化序列。根据同源岩浆演化的理论,结合岩石化学、地球化学、包体特征及各侵入体的接触关系等,将该岩体进行了系统的解体,圈定出23个大小不等的侵入体,进一步归并为5个单元和一个超单元,建立了区内的岩石谱系单位。并对超单元的成因类型和就位机制进行了探讨,认为该岩体是同一大地构造环境下同源岩浆多次脉(涌)动形成的超单元。     

首批国家级绿色矿山——湖州新开元碎石优先公司

正湖州新开元碎石有限公司隶属于上海建工集团股份有限公司,成立于1995年,企业注册资金1.52亿元人民币,年生产规模400万吨。公司产品主要有高速铁路特级道砟、高标号管桩优质骨料、高性能混凝土专用精品骨料和机制砂四大类,产品入选为湖州市名牌产品,获得全国砂石骨料大赛一等奖,为长三角地区重点工程提供优质骨料,     

河北甲山正长岩体的岩石谱系单位划分及地球化学特征

本文对承德县甲山正长岩体进行了岩石谱系单位划分，归并为甲山序列；对岩体的岩石化学、微量元素、稀土元素进行分析，提出深成岩体就位机制为热轻气球膨胀型式的模式。     

山东省稀土矿产资源特征及找矿方向研究初探

目前山东省已发现稀土矿床（点）7个,查明轻稀土资源储量77余万吨。省内稀土矿床的成因类型主要包括碱性岩系列和花岗岩系列两大类,碱性岩系列稀土矿床的赋矿围岩主要为中生代产出的正长（斑）岩体、碳酸岩及云母岩等,花岗岩系列稀土矿床的赋矿围岩为中生代花岗伟晶岩。本文总结了山东省稀土矿资源现状及开发利用程度,重点论述了碱性岩系列和花岗岩系列两类稀土矿床的典型矿床地质特征,提出在山东省内进行同类型稀土矿床的找矿方向,为稀土矿床勘查提供参考。     

Mass balance of major elements in relation to weathering in soils developed on igneous rocks in a semiarid region, northwestern Iran

This study was conducted to evaluate the weathering intensity of the major soils developed on igneous rocks in semiarid region of northwestern Iran.Eight parent materials were selected including monzodiorite,alkali granite,granodiorite,syenite,pyroxene diorite,hornblende andesite,pyroxene andesite,and dacite.Representative soil profiles were described and soil samples were collected and analyzed for selected chemical and physical properties and total concentrations of major elements and Zr,V,Ti and Y.Bulk densities as well as Ti,Zr and V concentrations were used to estimate the strain factors and mass balance equations were used to quantify the net result of pedogenic weathering,i.e.elemental loss and gain.The results of clay content and pedogenic iron variability as well as index of compositional variability(ICV),chemical index of alteration(CIA) and,A-CN-K and MFW ternary plots showed that the soils developed on volcanic rocks(hornblende andesite> pyroxene andesite> dacite) were more weathered than those on the plutonic parent rocks(alkali granite,granodiorite,monzodiorite,syenite,pyroxene diorite).The results of mass balance calculations based on the strain factors revealed that the Ca and Na depleted during weathering progress mostly from plagioclase grains.In the semiarid regions Ca is precipitated as pedogenic calcite in the soil horizons.K and Mg depletion is less than Ca and Na especially in the profiles on the hornblende andesite with the highest clay and LOI content.The results of this study clearly suggest that the behavior of K and Mg during the weathering cannot only be explained by the disintegration of the primary minerals,since they are fixed on the secondary clay minerals.Iron did not change in the soils compared to the parent material and was precipitated as the pedogenic iron and conserved in the soil horizons.Overall,the results on the weathering indicators and major elements mass balance enrichment/depletion in the study area confirmed that the soil profiles developed on volcanic rocks are more weathered than those on the plutonic igneous rocks.     

鲁村煤矿井底车场钢管混凝土支架支护应用

沂源县鲁村煤矿-270m井底车场围岩为泥质粉砂岩,强度低,含粘土矿物,吸水膨胀,传统的支护方式难以保证巷道稳定,采用钢管混凝土支架进行支护试验。分析了-270m井底车场围岩地质特征,提出基于钢管混凝土支架的综合支护方案,最后通过理论验算证实钢管混凝土支架承载能力为U29型钢支架4倍,满足巷道支护要求。     

关于鲁西龙宝山杂岩体序列归属问题的建议

鲁西龙宝山杂岩体由石英正长斑岩、霓辉二长斑岩、闪长玢岩及角闪闪长岩等岩性组成。近年研究结果表明：龙宝山杂岩体相关岩性侵位时间主要集中在125.0～131.7Ma,属早白垩世,与沙沟序列相关岩性形成年龄相近,并且具有相近的地球化学及全岩Sr、Nd同位素特征。鉴于龙宝山与郗山岩体相近的形成年龄、成岩成矿地质条件及地球化学特征,因此建议将龙宝山杂岩体相关岩性单元划归沙沟序列。     

辽宁碱性岩及其相关的金矿床与找矿方向

碱性岩及其相关的金矿研究已成为一个新的研究热点。通过对国内外碱性岩及与其相关的金矿特征的总结,并与辽宁碱性岩及其相关的金矿对比,发现本地区碱性岩金矿化率较高,尤其是碱性侵出（入）岩比其它任何岩类的成矿率都要高。大石沟、南大线和东五家子、长皋、线金厂等金矿床是典型的与碱性岩有关的金矿床,前二个金矿床与早白垩世晚期破火山口构造、末期次火山侵出相粗面岩有关,后三者与中生代脉状侵入的煌斑岩脉有关。另外还有与正长岩、霓辉岩有关的金矿点。辽宁与碱性岩相关的矿床形成时代晚于碱性岩,主要为浅成热液型金矿床,矿化类型以脉状为主,或为含金构造蚀变岩,或为含金石英脉,矿种以金为主,多伴生银和铜,矿床形成温度以中低温为主。有些金矿点金品位较高,具有一定的矿化规模,附近有金的重砂和化探异常显示,成矿条件有利,找矿前景很好,甚至是极有可能获得突破的重要靶区。建议对于这类成矿预测区予以特别注意。     

Prediction research of deformation modulus of weak rock zone under in-situ conditions

Weak rock zone (soft interlayer, fault zone and soft rock) is the highlight of large-scale geological engineering research. It is an important boundary for analysis of rock mass stability. Weak rock zone has been formed in a long geological period, and in this period, various rocks have undergone long-term consolidation of geostatic stress and tectonic stress; therefore, under in-situ conditions, their density and modulus of deformation are relatively high. Due to its fragmentary nature, once being exposed to the earth’s surface, the structure of weak rock zone will soon be loosened, its density will be reduced, and its modulus of deformation will also be reduced significantly. Generally, weak rock zone can be found in large construction projects, especially in the dam foundation rocks of hydropower stations. These rocks cannot be eliminated completely by excavation. Furthermore, all tests nowadays are carried out after the exposure of weak rock zone, modulus of deformation under in-situ conditions cannot be revealed. In this paper, a test method explored by the authors has been introduced. This method is a whole multilayered medium deformation method. It is unnecessary to eliminate the relatively complete rocks covering on weak rock zone. A theoretical formula to obtain the modulus of deformation in various mediums has also been introduced. On-site comparative trials and indoor deformation modulus tests under equivalent density conditions have been carried out. We adopted several methods for the prediction researches of the deformation modulus of weak rock zone under in-situ conditions, and revealed a fact that under in-situ conditions, the deformation modulus of weak rock zone are several times higher than the test results obtained after the exposure. In a perspective of geological engineering, the research findings have fundamentally changed peoples’ concepts on the deformation modulus of weak rock zone, provided important theories and methods for precise definition of deformation modulus of deep weak rock zone under cap rock conditions, as well as for reasonable engineering applications.     

翡翠定义探讨

通过对市场上常见翡翠的矿物组成、岩石类型的研究可知,翡翠是由钠铝质辉石(硬玉、绿辉石、钠铬辉石)和少量钠长石、钠质闪石组成的一种矿物集合体,其岩石类型主要为钠铝质辉石岩。根据钠铝质辉石岩中端员组分的量比关系,翡翠又可划分为:纯硬玉岩、纯绿辉石岩、纯钠铬辉石岩及它们之间过渡类型岩石。在此研究基础上,将翡翠定义为"具有宝石学价值的钠铝质辉石岩"。     

山东省石炭-二叠纪沉积岩建造与成矿作用

石炭-二叠纪是山东省主要成煤时期,同时期形成的矿产还有铝土矿及硬质粘土矿。根据以沉积岩基本层序为基础原则、以沉积相划分为依据原则、与沉积旋回划分相一致原则、与组级岩石地层单位划分相协调原则等沉积岩建造类型划分原则,将山东省石炭-二叠系划分为5个沉积岩建造,介绍了其特征,并阐述了石炭-二叠纪沉积岩建造与成矿作用的关系。