内蒙古西乌珠穆沁旗地区石炭二叠纪岩石地层

通过区域地质调查，对西乌珠穆沁旗-林西北部地区的石炭二叠纪地层进行了岩石地层学研究与重新归并划分。石炭系-下二叠统本巴图组（CPb）、格根敖包组（CPg）和阿木山组（CPa）三者为石炭纪-二叠纪西乌旗海槽同期异相地层的观点，能很好的解释这几套地层的相互关系。寿山沟组（P1ss）地层呈超覆不整合覆于下面地层或地质体之上；大石寨组（P2ds）为在达到最大海泛面时（海）水下火山喷发产物；哲斯组（P22s）为海盆地萎缩期的沉积。石炭二叠纪地层的合理划分，对于古亚洲洋封闭后的区域地层对比、构造演化和区域构造环境分析具有重要意义。     

内蒙古中部大青山新地沟绿岩带型金矿的成矿时代

内蒙古新地沟金矿床产于大青山太古宙花岗岩-绿岩带中,受色尔腾山群柳树沟组中基性火山岩系和韧性剪切带控制.容矿岩石主要是变安山质-英安质火山岩类.为解决主矿体的形成时代,采用石英40Ar/39Ar法,直接测定了含金石英细脉浸染状矿石中石英的形成时代,结果表明新地沟金矿的形成时代为1991.43～1988.93Ma.由此提出新地沟金矿的成因主要与吕梁期韧性剪切带中的变质变形作用有关.     

西藏公路建设中的泥石流调查与危险性评价

作者根据大量工程实例及常用方法总结了西藏公路建设中的泥石流调查、评价方法及有关地区性计算公式,对泥石流特征调查的重点主要包括形成条件、运动特征、危害及发展趋势等因素,调查范围一般应以泥石流沟谷(或冲沟)流域范围为界。在实地调查的同时,结合推理计算,方可有效地掌握泥石流的主要特征。泥石流对公路工程的危害性可通过泥石流的活动规模与易发程度定性评价。以上调查方法具有一定的普遍性,可作为今后类似地质环境条件下进行该工作的借鉴。     

阿尔金山脉中金雁山早古生代碰撞造山带：弧岩浆岩的确定与岩体锆石U-Pb和蛇绿混杂岩^40Ar／^39Ar年代学研究的证据

岩石学和地球化学研究结果显示,出露在新疆阿尔金山北部红柳沟-拉配泉蛇绿混杂岩带南侧的金雁山花岗闪长岩体形成于安第斯型陆缘弧构造背景,测得岩体的单颗粒锆石 U-Pb 年龄为467.1±6Ma。此外,对红柳沟-拉配泉蛇绿混杂岩基质绢云母石英片岩中的绢云母进行的~(40)Ar/~(39)Ar 定年,获得坪年龄455±2Ma,等时年龄450±11Ma。上述结果证实,金雁山是一条形成在早古生代的碰撞造山带,其洋-陆俯冲造山作用可能发生在早-中奥陶世,陆-陆碰撞造山作用可能发生在中奥陶世末期。     

Structural and Geochronological Evidence for Multiple Episodes of Tertiary Deformation along the Ailaoshan-Red River Shear Zone, Southeastern Asia, Since the Paleocene

Structural analyses show that the Ailaoshan-Red River shear zone （ASRRSZ） in Ailao Mountain is composed of three different deformational domains. These domains may represent three episodes of left-lateral slip experienced by the ASRRSZ. The first episode of such deformation occurred throughout the eastern high-grade belt of the ASRRSZ under a transtensional regime and produced L- type tectonites of amphibolite grade. The second episode of left-lateral slip formed high strain zones overprinting the high-grade belt. Its deformational mechanism is similar to simple shear and the deformed rocks are L-S mylonites of greenschist grade. The third episode of left-lateral slip took place chiefly in a western low-grade belt of the ASRRSZ. This deformation occurred in a transpressional regime, formed an overall structure pattern of a sinistral thrust system and produced phyllonites of low-greenschist grade. Geochronological data indicated that the three episodes of left-lateral slip happened before ～58-56 Ma, at least from ～27 Ma to 22 Ma and at ～13-12 Ma respectively. The first episode of slip in the ASRRSZ appeared to correspond to the initial collision of India and Asia at ～60 Ma. The second episode took place almost at the same time as the most intensive compression and uplift in Tibet. The latest event might represent a further eastward material flow in Tibet after ～16-13 Ma. Thus, the ASRRSZ of southeastern Asia probably experienced three main episodes of Tertiary left- lateral slip in the course of intracontinental convergence since the India-Asia collision.     

A CASE STUDY OF THE UNCORRELATED RELATIONSHIP BETWEEN TROPICAL TROPOPAUSE TEMPERATURE ANOMALIES AND STRATOSPHERIC WATER VAPOR ANOMALIES

Using the measurements from the Halogen Occultation Experiment(HALOE) and the European Centre for Medium-Range Weather Forecasts(ECMWF) Interim reanalysis data for the period 1994-2005, we analyzed the relationship between tropical tropopause temperature anomalies and stratospheric water vapor anomalies. It is found that tropical tropopause temperature is correlated with stratospheric water vapor, i.e., an anomalously high(low) tropical tropopause temperature corresponds to anomalously high(low) stratospheric water vapor during the period 1994-2005,except for 1996. The occurrence frequency and strength of deep convective activity during the‘mismatched'months is less and weaker than that during the‘matched'months in 1996. However, the instantaneous intensity of four short periods of deep convective activity, caused by strong surface cyclones and high sea surface temperatures, are greater during the ‘mismatched'months than during the ‘matched'months. Water vapor is transported from the lower troposphere to the lower stratosphere through a strong tropical upwelling, leading to an increase in stratospheric water vapor. On the other hand, deep convective activity can lift the tropopause and cool its temperature. In short, the key factor responsible for the poor correlation between tropical tropopause temperature and stratospheric water vapor in1996 is the instantaneous strong deep convective activity. In addition, an anomalously strong Brewer-Dobson circulation brings more water vapor into the stratosphere during the‘mismatched'months in 1996, and this exacerbates the poor correlation between tropical tropopause temperature and stratospheric water vapor.     

2013年夏季浙江省高温干旱环流异常分析

利用浙江省10个站的温度和降水资料、国家气候中心160站的降水资料、NOAA的ERSST和OLR资料及NCEP再分析资料,对2013年7至8月发生在浙江省的持续高温干旱天气过程的基本特征和环流异常进行了分析。结果表明:浙江省各站的高温日数、高温持续日数、持续无降水日数、干旱指数都远超历史同期纪录,降水较常年偏少3成以上。南亚高压强度偏强,面积偏大,东侧脊点位置偏东;西太平洋副高强度偏强,西侧脊点位置偏西;东亚季风异常偏强及其造成的水汽辐合偏弱,是高温干旱天气产生的重要原因。其中7月底西太平洋副高的异常西伸及8月异常持续偏西对浙江8月持续高温干旱的发生起了决定性作用,这与同期热带西太平洋暖池区增暖、菲律宾周围对流活动加强有关,后者通过EAP/PJ遥相关型对前者产生影响。     

圆形剖分再生长的扩展Voronoi图构建方法

针对传统Vonoroi图生成过程中存在的局限性,根据各种Voronoi图生成算法的原理和特点,该文融合Delaunay算法和模拟生长算法的思想,提出了一种基于圆形剖分再生长的扩展Voronoi图生成方法.根据任务要求自定义生长函数,实现初始圆的扩展生长,达到成熟条件时停止生长;计算相邻圆之间的交点并作交线,通过一定处理后得到对应生成元的Voronoi图边界,遍历所有生长圆即可得到全域Voronoi图.通过仿真验证了该方法的可行性,易于拓展到加权Voronoi图的构建,为Voronoi图的构建提供了一种技术手段,且该方法更简洁直观.     

小秦岭灵宝金矿田整装勘查第一深孔钻探工艺

针对小秦岭枪马金矿区800 m以深诸多未知因素,借鉴山东、安徽等钻探单位的深孔施工经验,缜密详细地制定了施工设计方案,成功地完成了该区金矿田2018.86 m第一深孔的钻探施工任务。介绍了该孔的钻探工艺和施工技术。