高温后花岗岩密度及波动特性的试验研究

测试了25块花岗岩试件在经历不同高温前后的密度、纵波波速等物理特性常数，并由测得的纵波波速间接计算出花岗岩的弹性模量，同时应用力学的常规压缩方法直接测试计算了岩石的弹性模量，分析了经历不同高温后花岗岩密度、纵波波速和弹性模量的变化情况．测试结果表明，经历高温后花岗岩的密度和纵波波速等物理特性常数与常温相比均有不同程度的减小，而且随加热温度的升高，减小的幅度增大，但是纵波波速的变化幅度要比密度的变化幅度大得多；根据物理特性常数计算的弹性模量的变化幅度要远大于根据力学常规压缩方法测试计算的弹性模量的变化幅度，这说明经历高温后岩石物理性质(纵波波速等)的变化比力学性质的变化更剧烈．     

3-RRC全柔性机构中柔性铰链刚度矩阵建立

全柔性机构中柔性铰链单元刚度矩阵的建立是进行全柔性机构分析的基础．以3～RRC全柔性并联机构中出现的柔性铰链为例，介绍其结构型式并建立力学模型．采用差分法和复化抛物形求积方法分别得出了变截面柔性铰链单元上所受外力与端部变形之间的关系．通过矩阵位移法建立柔性铰链单元拉弯组合变形的刚度方程，并借助变形体内力分析和拉弯组合变形时单元刚度矩阵的特点，得出柔性铰链刚度矩阵的各个元素，为全柔性机构的运动学、动力学分析提供了方便．     

花岗石的致色原因与褪变色机理

通过对花岗石材进行加热、阳光照射、紫外线和6 0 Co辐照等实验 ,研究了它们的褪变色规律 .根据能带理论 ,结合实验结果探讨了花岗石的褪变色机理 ,提出花岗石褪变色现象的利用与防护建议 .     

SHRIMP U-Pb zircon dating on Nyainqentanglha granite in central Lhasa block

The Nyainqentanglha granite, a batholith with an area of 1500 km^2 in the central Lhasa block, comprises mainly medium-fine-grained biotite monzonitic granite and medium-coarse-grained biotite monzonitic granite. Their contact relationship suggests that the medlum-fine-grained biotite monzonitic granite was crystallized earlier than the medium-coarse-grained monzonitic granite. A SHRIMP U-Pb dating on zircons from representative samples of the batholith shows that the crystallization age of the medium-fine-grained biotite monzonitic granite is 18.3 Ma and that of the medium-coarse-grained monzonitic granite is 11.01 Ma. The emplacement and crystallization of the Nyainqentanglha granite, the youngest granite batholith ever known inside the Lhasa block, have a close relationship with the collisional orogeny, crustal thickening, plateau uplifting,E-W crustal extension and have a dynamic genetic relationship with the crustal partial melting.     

Mixing events between the crust- and mantle-derived magmas in Eastern Kunlun: Evidence from zircon SHRIMP Ⅱ chronology

Granitoidswidelyoccurincontinentalcrustandareusuallygeneratedinresponsetocontinentalgrowthandassociatedcrust-mantleinteraction.Granitoidscanbepro-ducedthroughdifferentways,ofwhichmagmamixinghasdrawnspecialattentionbecauseofitsprofoundbear-ingsoncrust-mantleinteractionandcontinentalgeody-namics[1].Themostdistinctfeatureforgranitoidsformedbymagmamixingisprobablytheoccurrenceofmaficmicrogranularenclaves(MMEs).Sofar,originforMMEsisstillhotlydebated,andavailablehypothesesconsidertheMMEsas(1)ref…     

Th-rich zircon from peralka line A-type granite： Mineralogical features and petrological implications

Zircon is one of the most common accessory minerals in igneous rocks, especially in granites. It exists through the crystallization and evolution of grantic magma be-cause of stable physicochemical properties. Trace element abundances (e.g. Hf, Th, U, Y) in zircon are very sensitive to the crystallization environments[1]. Therefore, zircon plays an important role in the granite research. However, although A-type granites are given more and more regards by the geologists owing to their charac…     

Emplacement age of the Tahe granite and its constraints on the tectonic nature of the Ergun block in the northern part of the Da Hinggan Range

Large-scale granitic plutons are exposed in the Ergun block in the northern part of the Da Hinggan Range, but their emplacement age and petrogenesis remain unknown. Of these plutons, the Tahe pluton is composed mainly of porphyritic syenogranite and monzogranite, with minor hornblende alkali feldspar granite and gabbro, which have affinities to post-orogenic granitoids. Laser-ablation Inductively Coupled Plasma Mass-spectroscope （LA-ICP-MS） analysis shows that the major rock types of the Tahe pluton formed at 494- 480 Ma ago, indicating its emplacement in the Early Paleozoic. It is concluded, therefore, that the collision between the Ergun and the Xing＇an blocks ended in Early Paleozoic. Considering the geochronological data of the plutons in the adjacent areas, the Early Paleozoic evolutionary history of the Ergun block is similar to the central Mongolia and the Tuvino blocks in Mongolia, and the Ergun block should be a part of the accretionary continental margin in the southern Siberian Craton.     

论贵东花岗岩体的成因及其起源

本文根据贵东花岗岩体在地质学、岩石学、岩石化学、地球化学和稀土元素配分等方面的特征,探讨了它的成因和起源。结果表明,贵东岩体系由陆壳硅铝层重熔而形成,且受重熔的地层,很可能就是该区域晚元古代一早古产代的加里东地槽型沉积物。     

关于不定方程组a2x^2—a1y^2=a2—a1,a3y^3—a2z^2=a3—a2的非平凡解

给出了不定方程组a2x^2-a1y^2=a2-a1,a3y^3-a2z^2=a3-a2有正整数解的一个充分必要条件以及当系数（a1,a2,a3）满足条件（a1,a2,a3）＝1且a1a2＋1∈N^2或a2-a1＝1时求该不定方程组的非平凡正整数解的一个方法，该方法可以在计算机上用“迭代”算法实现。     

综放工作面采煤机负压二次降尘技术的研究与应用

综放工作面的尘源中采煤机的产尘约占总尘量的一半左右 ,本文通过兴隆庄煤矿“综放工作面采煤机负压二次降尘技术”的现场研究及应用 ,比较有效地解决了采煤机的产尘问题 ,明显改善了采煤工作面的劳动环境