片岩

The particle size distribution of detritus sampled from different excavation machines and methods is calculated and analyzed.

选取隧道挖掘过程中所产生的破碎岩片为研究对象并系统分析了各种掘进机械及挖掘方法下破碎岩片的粒度分布。

Calidonian granites are widely developed in the Yema Nanshan area in the western segment of the Qilian orogenic belt. The geochemical characteristics of most of the granites are similar to those of adakites: SiO2≥56%, Al2O3≥15.0%, low MgO (average 2.04%), high Sr (257-889μg/g, average 546.42μg/g), low Y (7.1-25.3μg/g,average 16.67μg/g), average Sr/Y=5.89, no pronounced Eu anomaly and Sr positive anomaly. Adakites in this area have five rock types, quartz diorite, quartz monzodiorite, quartz monzonite, monzogrannite and hornblende granite. These rocks commonly contain hornblende, belonging to I-type granites.

提要：祁连西段野马南山一带发育大量的加里东期花岗岩，其中大部分花岗岩具有与adakite岩相似的地球化学特征，SiO2≥56%， Al2O3≥15.0％，低MgO（平均2.04％），高Sr(257～889μg/g，平均值546.42μg/g)，低Y（7.1～25.3μg/g，平均16.67μg/g），Sr/Y平均为35.89μg/g，Eu无明显负异常，Sr正异常，Adakite岩石类型有石英闪长岩、石英二长闪长岩、石英二长岩、角闪花岗岩、二长花岗岩，岩石中普遍含有角闪石，属I型花岗岩，地球化学图解反映该花岗岩形成环境为板块碰撞前的岛弧型，锆石U-Pb同位素年龄为444+38/-33 Ma，处在祁连造山带板块俯冲收缩阶段，因此可以推断野马南山埃达克质Adakite花岗岩是俯冲板片部分融熔和壳幔岩浆混合形成的。

Amaranth radiolarian silicate close connected with ophiolite slices are discovered in "Ma'erzheng Fm." along Huashxia — Long Stone Hill for the first time, and abyssal Early Permian radiolarians are got, thus provide important reference date for the forming age of ophiolite in this belt.

2首次在花石峡—长石头山一带的"马尔争组"中发现与该带蛇绿岩岩片有密切联系的紫红色放射虫硅质岩，并分离出丰富的深海相早二叠世放射虫化石，为该带蛇绿岩的形成时代提供了有重要价值的参考年龄。

This paper briefly introduces the basic fact of the existence of the PaleoTethys Ocean in the Lungmu Co-Shuanghu suture, i.e. the ages and natures of Early Paleozoic ophiolites, Permian ophiolites, Devonian-Permian radiolarian cherts, accretionary slabs of different natures, two types of tectonic mrlange zones and covers of ophiolites. The starting time of the Paleo-Tethys Ocean in Qiangtang may be traced back to Early Paleozoic and the records about the oceanic basin evolution persisted from the Late Devonian to Late Triassic.

简要介绍了龙木错-双湖缝合带中有关古特提斯洋存在的基本事实，即早古生代洋壳残片、二叠纪蛇绿岩、泥盆纪-二叠纪放射虫硅质岩、各类不同性质的增生岩片、2种类型的构造混杂岩带和蛇绿混杂岩盖层体系的时代与性质等，已有的资料初步确定羌塘古特提斯洋盆演化的时限为晚泥盆世到晚三叠世。

Through geothermometry and geobarometry, the temperature and pressure conditions of the three types of amphibolites are calculated, gneissic amphibolites: 597.0℃,0.536Gpa, banded amphibolites: 597.0℃,0.536Gpa, mylonitic amphibolites: 597.0℃,0.536Gpa.

通过地质温压计计算，三种斜长角闪岩及其原岩的形成与变形温压条件具有从升温升压经降温升压到降温降压的变化规律（片麻状斜长角闪岩：597.0 ℃，0.536 Gpa；条带状斜长角闪岩：597.0 ℃，0.536 Gpa；糜棱状斜长角闪岩：597.0 ℃，0.536 Gpa）。

Through geothermometry and geobarometry, the temperature and pressure conditions of the three types of amphibolites are calculated, gneissic amphibolites: 597.0℃, 0.536 GPa, banded amphibolites: 617.3℃, 0.455 GPa, mylonitic amphibolites: 558.8℃, 0.514 GPa.

通过地质温压计计算，3种斜长角闪岩及其原岩的形成与变形温压条件具有从升温升压经降温升压到降温降压的变化规律（片麻状斜长角闪岩：597.0℃，0.536 GPa；条带状斜长角闪岩：617.3℃，0.455 GPa；糜棱状斜长角闪岩：558.8℃，0.514 GPa）。

Focusing on the PGE enrichment mechanism in the basic-ultrabasic intrusions in the Panxi rift, firstly, through the interpretation of TM photograph, data processing of regional geochemical exploration and geophysical prospecting results of gravity, magnetic force and seism, we analyzed the controlling effect of structure and magmatic movement on the PGE mineralization; Secondly, through the study of volcanic apparatus, petrography, measurement of comprehensive geochemical section, isotope tracing and dating of typical PGE-rich melanocratic rock series, we discussed the sources of the PGE-bearing mafic-ultramafic intrusions and basalts, their timing, evolvement sequences, the geochemical processes of magma crystallization and fractionation, and the relationship between magma evolution and structural development; Finally, through the analysis of PGE and chalcophile elements concentrations in the melanocratic rock series and the contrastive study with the Noril''sk magmatic Ni-Cu-PGE sulfide deposit, its related continental flood basalts and Siberia Traps, we discussed PGE mineralization characteristics and its enrichment mechanisms in the melanocratic rock series in the Panxi rift.

本项目首先围绕川西地区主要的PGE矿床及伴生矿的地质环境和有关的地质构造背景，通过TM卫片解译、区域化探和重、磁及地震物探资料分析，总体把握构造及岩浆活动对PGE成矿的控制作用；然后通过对典型富PGE暗色岩套的火山机构地质构造、岩石岩相学、地球化学、同位素定年和示踪等方面的工作，分析本区基性－超基性含矿岩体与喷出岩之间的成岩物质来源、侵入时代及演化序列，研究该区同一岩浆房分异结晶的地球化学过程及其随构造发展的耦合关系；最后通过对暗色岩套PGE地球化学剖面分析以及与俄罗斯诺里尔斯克陆内裂谷溢流型玄武岩中PGE矿化的岩石－构造环境对比研究，探讨该区暗色岩套中的矿化特点和富集部位及其PGE富集机制。

Therefore,the northern Sulu UHPM zone can be divided into four petrological tectonic units from southeast to northwest:Haiyangsuo metamorphic complex (eclogitized crystalline basement of the Yangtze craton),Rongcheng UHPM complex,Weihai metamorphic complex (granulites retrograded from UHPM eclogites) and Kunyushan boundary metamorphic magmatic complex.

由此笔者将苏鲁变质带北部由南向北划分为海阳所变质地块（榴辉岩化扬子陆块基底变质单元）、荣成变质地块、威海变质地块（麻粒岩相叠加变质的超高压构造岩片）、昆嵛山边界杂岩带。

This enriched and developed the basic thought of numerical theory, resolved the bottleneck problem that astricts the development of numerical value analysis method, open up a new field for the geomechanic engineering application of 3-D network and numerical value analysis method, it's an available and essential attempt, it's also a necessary trend of numeric times development.

10通过岩体三维节理网络模拟，建立岩体结构的概化模型，基于数值法对岩体进行大量的&数值模拟试验&，获取岩体变形参数，丰富并拓展了数值模拟理论的基本思想，解决了选择岩体参数这一束缚数值分析方法发展的瓶颈问题，为数值分析方法和三维节理网络在岩土工程实践中的应用拓展了一片新的天地，是一种有益而且非常必要的尝试，也是数字时代发展的必然趋势，具有一定的理论意义和应用价值。

The famous "Tiantangzhai migmatitic granite"(1∶200000 Luotian map) is seperated as Yanshan epoch many granitic plutons, and the most representative two plutons are Tiantangzhai and Jiuzihe pluton, Most of these plutons extend NE direction according with the orientation of regional tectonic line, and have weak gneissosity and banded structure, and contact with country rocks by graduational or intrusive relationship.

首次将大别造山带核部著名的&天堂寨混合花岗岩&(1∶20万罗田幅)解体为燕山期的多个花岗岩体，其中最有代表性的岩体为天堂寨岩体、九资河岩体。这些岩体大多呈NE向展布，与区域构造线方向一致，发育有微弱片麻理和条带状构造，与围岩变质岩呈渐变过渡接触或侵入接触。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了