The Songpan-Garze Massif: Its Relation to the QinlingFold Belt and Yangtze Platform and Developmental History

Whether there existed the Songpan-Garze massif is a controversial problem. This paper expounds and proves that the old basement of the massif is represented by the pre-Sinian granitic rock series. This massif and the South Qinling fold belt might both be a part of the old Yangtze platform. Rifting generated by the Caledonian orogeny in the terminal Early Palaeozoic caused the massif to be disintegrated from the northwestern part of the Yangtze platform. This disintegration, however, was not thorough, and the rift troughs were later gradually closed and filled up. The Emei taphrogeny that was initiated in the Early Permian Maokou' an Stage involved a second disintegration of this massif from the Yangtze platform. The rift line largely goes along the Muli-Pingwu line. This rifting belongs to synchronous extensional rifting at peripheries of the Yangtze platform and in its interior, showing that the posterior, lateral and interior extension resulting from rapid northward shift of the Yangtze platform led t     

滇西昌宁—孟连带硅质岩的阴极发光特征及其意义

阴极发光手段在恢复碳酸盐岩和砂岩的原始结构构造、成岩及孔隙演化等方面已显示出独特作用,而用于地层学研究较少。硅质岩多为自生成因,常由非晶质或隐晶质ＳｉＯ２ 矿物组成,多数在成岩中发生重结晶作用,通常在低能（＜ ２０ ０００ ｅＶ）阴极射线下发光很弱,常被研究者们忽视。通过对滇西昌宁－ 孟连带晚古生代硅质岩的高能（２５ ０００ｅＶ）阴极发光及相关研究表明：自生或重结晶的硅质岩（含放射虫化石）（石英）发光明显,其发光强弱和发光特征与Ｆｅ,Ｃｏ,Ｎｉ和Ｍｎ,Ｃｒ,ＲＥＥ质量分数有直接关系,并受地层的沉积－ 构造背景控制,对造山带地层分区和地层格架研究有重要意义     

四川三台膨润土的基本物化性能及其对铅、钴的吸附性研究

对四川三台钙基膨润土的基本物化性能和对Pb^2 ，Co^2 离子的吸附性能作了初步的研究。基本物化性能主要包括化学成分、阳离子交换容量、密度、比表面积、孔径、渗透系数及热稳定性。通过实验得出：1)经过钠化改型并酸化处理后的膨润土的阳离子交换容量(CEC)明显高于未经处理的原土；2)膨润土的最佳酸活化条件为在96℃左右以15％的硫酸活化4小时的性能最佳；3)膨润土土的密度为2．11g／cm^3，颗粒密度钠化土为1．996g／cm^3，原土为2．079g／cm^3；渗透系数为0．013cm／s(20C)；体积平均粒径为30．950μm；比表面积为329．7482m^2／g，平均孔径为33．238nm；4)膨润土对对重金属离子的吸附实验，得出膨润土对重金属离子Pb^2 的吸附性能优于Co^2 ，Pb^2 和Co^2 的吸附比(Rd)分别为167．8ml／g及53．3ml／g；Pb^2 和Co^2 去除率(r)分别为45．87%和21．20％。     

川西北微细浸染型金矿集中区构造对金成矿的控制

川西北微细浸染型金矿集中区,金成矿带及金矿床明显受构造的控制。从区域成矿地质背景及控矿因素来看,大地构造环境制约着“矿源层”及赋矿地层的形成,区域断裂构造控制着金成矿带及金矿床的空间分布。川西北地区金矿矿田构造规律的研究表明,金矿化局部富集主要发生在断裂产状变化部位、两组断裂的交汇部位以及碎裂岩与构造透镜的接合部位。     

几种纤维矿物粉尘的真空有机吸附及表面基团变化

利用真空有机吸附和红外光谱分析法,研究了几种纤维矿物粉尘对不同偶极矩的正己烷（偶极矩为０）、乙醚（偶极矩为１．１６）和吡啶（偶极矩为２．１９）的吸附特征及这种有机试剂对表面基团的影响。研究发现：纤维矿物粉尘对有机试剂的吸附能力并不完全与有机试剂的偶极矩大小成正比;部分纤维矿物粉尘对正己烷的吸附为化学吸附,吸附解吸后出现了１２６２￣１２６７ｃｍ＾－１、１３１１ｃｍ＾－１的新的ＩＲ谱带,它们应是部分纤     

金云母—蛭石间层矿物分晶层晶体化学式的计算及意义

金云母－蛭石间层矿物由金云母晶层与蛭石晶层交叠排列而成，采用一般计算方法得出的晶体化学式不能充分揭示结构中金云母晶层与蛭石晶层各自的晶体化学特征。本文以化学成分分析与阳离子容量为基础，假定可交换性阳离子均为蛭石晶层层间阳离子，非交换性阳离子为金云母晶层层间阳离子，金云母晶层与蛭石晶层具有相同的八面体层等，计算出了结构中两种晶层的分晶层晶体化学式，确定了结构中两种晶层的比例和蛭石晶层的电荷数。并在此基础上讨论了新疆尉犁蛭石矿金云母－蛭石间层矿物的晶体化学特征。结果表明该方法设计合理，符合晶体化学原理，所计算的数据可靠。利用该方法计算出的两种晶层的比例为金云母－蛭石1：1规则间层矿物的确定提供了必要的依据。也为其它类似间层矿物的研究提供了一种计算分晶层晶体化学式的可行方法。     

Elemental Geochemical Anomaly in the Sinian Doushantuo Formation-Dengying FormationBoundary in Miaohe, Hubei

No research has been made on such a lower rank boundary as the Sinian Doushantuo Formation-Dengying Formation boundary in the eastern region of the Yangtze Gorges. Elemental geochemical determination has revealed anomalies of REE and other trace elements around the boundary, which have relatively high contents than those in its overlying and underlying beds. The authors therefore think that a catastrophic event once occurred in the Miaohe area at the end of the Doushantuoan Period, which caused the mass extinction of the Miaohe biota.     

四川平武绿柱石宝石成矿地质特征

四川平武产出世界上十分稀少和珍贵的无色透明扁平板状绿柱石宝石。在野外详细调研和系统分析、测试基础上，全国总结和介绍矿床成矿地质环境，绿柱石宝石产出特征，绿柱石宝石矿物学、化学成分、结晶习性及晶体化学、谱学特征、包裹体特征，花岗岩与Be及W,Sn矿化关系和成矿的物理、化学条件。从而，确认该矿床为岩浆期后气成-热液型绿柱石宝石矿床。