锇粉中杂质元素分析方法研究

利用ＩＣＰ＿ＭＳ技术建立了锇粉中痕量杂质元素的分析方法。在浓ＨＮＯ３介质中，锇以ＯｓＯ４形式挥发除去，分离锇基体后，可直接测定的痕量元素达５０余种。取样量０．１ｇ，测定限为０．２～２４６ｎｇ／ｇ，可实现质量分数ｗ（Ｏｓ）为９９．９９９９％锇粉中杂质元素测定。结合ＩＣＰ＿ＡＥＳ测定Ｋ、Ｎａ、Ｃａ、Ｍｇ、Ａｌ、Ｆｅ、Ｓｉ和Ｐ，可实现锇粉原料及产品的纯度分析。     

铅—试铁灵络合物吸附波及溴化十六烷基三甲基铵增敏效应的研究

在０３０ｍｏｌ／ＬＨＡｃ介质中，Ｐｂ（Ⅱ）与７＿碘＿８＿羟基喹啉＿５＿磺酸（试铁灵，Ｆｅｒｏｎ）的络合物于－０５４Ｖ（ｖｓ．ＳＣＥ）产生一尖锐的极谱波，加入溴化十六烷基三甲基铵（ＣＴＭＡＢ）显著增敏，可使极谱波增高约４倍。峰电流与Ｐｂ（Ⅱ）浓度在９６×１０－９～４８×１０－６ｍｏｌ／Ｌ呈良好的线性关系，检出限为４８×１０－９ｍｏｌ／Ｌ。用多种电化学方法研究了该极谱波的性质及电极反应机理表明，络合物组成比为ｎＰｂ（Ⅱ）∶ｎＦｅｒｏｎ＝１∶１，极谱波为吸附波，峰电流由中心离子Ｐｂ（Ⅱ）还原产生，电子转移数为２。试验了多种离子对峰电流的影响，拟定的方法用于矿样分析，结果与原结果相符。     

新疆阿拉尔花岗岩MFC过程的微量元素综合效应

新疆阿拉尔花岗岩的微量元素比相关图显示了线性样点列与幂函数曲线形式的样点列相 复杂图型。该图型用简单混合或者单一结果分异模型都不能解释。本文建立了混合－结晶分异复合过程的微量元素综合效应模型。模型１：从初始混合线引起害虫函数曲线束形式的结晶分异线。特殊情况有结晶分异线简化为通过原点的直线束形式或者与初始混合线重合。     

The Organization of Production in High Technology Industries: An Empirical Assessment*

Recent attention given to the concept of vertical integration and disintegration of production processes has identified the existence of a continuum, with small, flexibly specialized producers at one end and large, mass production units at the other end. Firms along the continuum constantly strive for the optimum combination of economies of scale and scope. This paper attempts to identify the organizational characteristics of high technology firms in one industrial complex of the U.S. Manufacturing Belt. A principal components analysis is performed on a number of theoretically relevant variables for a sample of high technology establishments in Northeast Ohio. The results indicate that the region contains a variety of organizational forms ranging from isolated workshops to large, vertically integrated assembly plants. These findings conform to expectations derived from recent conceptualizations in the literature. Additional empirical research will further enhance understanding of the processes that shape the organization of production in territorial complexes.     

五台山西部狐狸山含金韧性剪切带的地球化学研究

狐狸山金矿区，在无蚀变作用参与的韧性变形过程中，岩石化学成分发生了明显的变化。但大多数微量元素含量变化不大，稀土元素配分模式基本不变，它们可以反映原岩的特点。蚀变糜棱岩型矿体与围岩相比，稀土配分模式、亲硫元素Ａｕ、Ａｇ、Ｃｕ和两性元素Ａｓ、Ｓｂ含量差别显著，尤其是Ａｕ含量，前者是后者的百倍～几万倍，金的成矿作用主要与韧性变形后期富金流体的蚀变作用关系密切。     

湖相介形虫壳的稳定同位素和微量元素在古气候研究中的应用

本文介绍了测定实验室养殖的介形虫Candonarawsoni和水的氧同位素分馏系数，结果表明，这个种属的介形虫壳的氧同位素组成是它所生成环境水的氧同位素组成和水温的函数。因此，介形虫壳的氧同位素组成是一个很好的水化学环境指示计。本文研究了Candonarawsoni的脱壳温度范围，发现它可以在很宽温度范围内脱壳及生长新壳。由于季节温度变化很大，所以用介形虫壳的地球化学指标研究古环境的变化时，每个样品都要采集较多的个体介形虫壳，以使其分析结果能代表年平均温度。     

茅台酒酿酒高梁的地质环境研究

茅台酒对酿酒高梁有严格要求，适于茅台酒传统酿造工艺的高梁只产于仁怀县的某些地区，主要是受地质环境的控制。仁怀高梁对某些常量和微量元素有着鲜明的选择性，对磷和钼表现出强烈的吸收作用。岩－土剖面元素的迁聚，对磷和铝的供应是确定仁怀高梁品质和产量的关键。侏罗系砂泥岩、二叠系煤系地层的岩－土剖面，元素淋溶微弱，总量丰富，有效态含量高，组合良好，能正常进行岩－土－高梁系统的物质转化与元素迁移，能充分供应高梁生长所需的磷和钼等元素，是茅台酒酿酒高梁的最宜种植区。     

Rapid Variscan exhumation and the role of magma in core complex formation: southern Brittany metamorphic belt, France

ABSTRACT The high-grade migmatitic core to the southern Brittany metamorphic belt has mineralogical and textural features that suggest high-temperature decompression. The chronology of this decompression and subsequent cooling history have been constrained with ⁴⁰Ar/³⁹ Ar ages determined for multigrain concentrates of hornblende and muscovite prepared from amphibolite and late-orogenic granite sheets within the migmatitic core, and from amphibolite of the structurally overlying unit. Three hornblende concentrates yield plateau isotope correlation ages of c. 303–298 Ma. Two muscovite concentrates record well-defined plateau ages of c. 306–305 Ma. These ages are geologically significant and date the last cooling through temperatures required for intracrystalline retention of radiogenic argon. The concordancy of the hornblende and muscovite ages suggest rapid post-metamorphic cooling. Extant geochronology and the new ⁴⁰Ar/³⁹Ar data suggest a minimum time-integrated average cooling rate between c. 725 °C and c. 125 °C of c. 14 ± 4°C Ma^-1, although below 600 °C the data permit an infinitely fast rate of cooling. Mineral assemblages and reaction textures in diatexite migmatites suggest c. 4 kbar decompression at 800–750 °C. This must have pre-dated the rapid cooling. Emplacement of two-mica granites into the metamorphic belt occurred between 345 and 300 Ma. The youngest plutons were emplaced synkinematically along shallow-dipping normal faults interpreted to be reactivated Eo-Variscan thrusts. A penetrative, west-plunging stretching lineation developed in these granites suggests that extension was orogen-parallel. Extension was probably related to regional uplift and gravitational collapse of thermally weakened crust during constrictional (escape) tectonics in this narrow part of the Variscan orogen. This followed slab breakoff during the terminal stages of convergence between Gondwana and Laurasia; detachment may have been consequent upon a change in kinematics leading to dextral displacement within the orogen. Dextral ductile strike-slip displacement was concentrated in granites emplaced synkinematically along the South Armorican Shear Zone. Rapid cooling is interpreted to have resulted from tectonic unroofing with emplacement of granite along decollement surfaces. The high-grade migmatitic core of the southern Brittany metamorphic belt represents a type of metamorphic core complex formed during orogen-parallel extensional unroofing and regional-scale ductile flow.     

阿尔泰造山带构造演化研究中的几个关键问题剖析

对阿尔泰山地区的构造格局、构造变质、岩浆岩时代、动力热事件和构造区类型归属等几个地学基础问题进行深入细致研究的基础上，反演了阿尔泰地槽造山带形成和演化的递进历程。     

秦岭核桃坝石炭系深水相遗迹化石,沉积环境和古地理分析

研究剖面位于陕西凤县核桃坝，构造上属秦岭造山带的商丹缝合带。核桃坝剖面下部为浅海陆棚相粉砂岩、泥灰岩和灰岩；中、上部以重力流沉积为主。在中部浊积岩中产遗迹化石：Ｎｅｒｅｉｔｅｓ ｆｅｎｇｘｉａｎｅｎｓｉｓ ｉｃｈｎｏｓｐ．ｎｏｖ．，Ａｃａｎｔｈｏｒｈａｐｈｅ ｃｆ． Ａ． ｉｎｃｅｒｔａ Ｋｓｉａｚｋｉｅｗｉｃｚ，Ｃｈｏｎｄｒｉｔｅｓ ｉｃｈｎｏｓｐ．，Ｐｌａｎｏｌｉｔｅｓ ｉｃｈｎｏｓｐ．等。其