八卦庙金矿床的绿泥石特征及成岩成矿意义

绿泥石是八卦庙大型金矿床的主要热液蚀变矿物，本文系统地研究了绿泥石的产状、矿物学、化学成分等特点。在此基础上应用Walshe的绿泥石六组分热力学模型计算了绿泥石形成的物理化学条件：形成温度247.6～335.1℃，lgfo2值为一27.35～37.99，lgfs2的值是－7．46～－13.02，与根据成矿期石英包裹体所计算的值相近。     

RELATIONSHIP OF ECO-ENVIONMENTAL CHANGE WITH NATURAL EROSION AND ARTIFICIALLY ACCELERATED EROSION

Ｆｏｒｌｏｎｇｔｉｍｅ,ｔｈｅｐｒｏｂｌｅｍａｂｏｕｔｎａｔｕｒａｌｅｒｏｓｉｏｎａｎｄａｒｔｉｆｉｃｉａｌｌｙａｃｃｅｌｅｒａｔｅｄｅｒｏｓｉｏｎｉｓｉｎｄｉｓｐｕｔｅ.ＨｉｓｔｏｒｉｃａｌｇｅｏｇｒａｐｈｅｒｓｃｏｎｓｉｄｅｒｔｈａｔｈｕｍａｎｉｎｄｕｃｅｄｅｃｏｅｎｖｉｒｏｎｍｅｎｔａｌｄｅｓｔｒｕｃｔｉｏｎｉｓａｃｃｏｕｎｔａｂｌｅｆｏｒｔｈｅｓｅｖｅｒｅｓｏｉｌｅｒｏｓｉｏｎａｎｄｅｃｏｅｎｖｉｒｏｎｍｅｎｔｄｅｔｅｒｉｏｒａｔｉｏｎｏｎＬｏｅｓｓＰｌａｔｅａｕ[7,8].Ｓｏｍｅｇｅｏｌｏｇ…     

数字指示式调速搅拌仪的研制

采用调速稳速集成电路通过电位调节买现自反馈电子稳速，克服了实验过程中溶液阻尼变化对电机转速的影响，并利用高精度时钟信号与十进制记数器完成光电测速过程。     

辽宁海城地区辽河群底部大型韧性滑脱带的构造演化

通过对辽宁海城地区赵家堡子－马风－什司县一带早元古宙辽河群底部地层和变质深成侵入体的详细构造研究，确认了辽河群底部与太古宙之间大型韧性滑脱带的存在。卷入滑脱带的地质体有辽河群底部浪子山岩组和早元古宙变质深成侵入体。滑脱带的构造演化可划分为：①吕梁运动早期沿太古宙与早元古宙接触带部位发生大规模拉伸顺层滑脱变形作用；②拉伸滑脱变形中晚期早元古宙深成侵入体沿滑脱带顺层同构造就位；③吕梁运动晚期滑脱带的收缩变形作用三大阶段。     

火山岩熔融,结晶,淬火实验及其岩石学意义

本文对我国福建，江西，河南等地某些典型玄武岩和部分安山岩以及意大利威苏维火山的白响岩质碱玄岩进行了实验研究，其中包括熔融，结晶，淬火实验。根据实验结果，分析了熔浆成分对首晶矿物的影响，阐明了晶体形态与结晶温度，生长速度及成核密度的关系，研究了斜长石，白榴石的晶出及其矿物学，岩石学意义，论述了橄榄石，辉石的成分特生上春晶出后熔浆成分的演化趋势，讨论了单斜辉石的淬火效应与压力效应。     

碎石桩复合地基抗液化设计方法的分析

对碎石桩复合地基抗液化设计方法进行了分析评价 ,并对施工技术作了介绍。基于复合地基抗地震液化作用的分析 ,提出一种合理的抗液化设计方法 ,该方法能够体现碎石桩复合地基的加密、排水和减震三方面的抗地震液化作用。     

Seasonal Variation of the East Asian Subtropical Westerly Jet and Its Association with the Heating Field over East Asia

The structure and seasonal variation of the East Asian Subtropical Westerly Jet （EAWJ） and associations with heating fields over East Asia are examined by using NCEP/NCAR reanalysis data. Obvious differences exist in the westerly jet intensity and location in different regions and seasons due to the ocean-land distribution and seasonal thermal contrast, as well as the dynamic and thermodynamic impacts of the Tibetan Plateau. In winter, the EAWJ center is situated over the western Pacific Ocean and the intensity is reduced gradually from east to west over the East Asian region. In summer, the EAWJ center is located over the north of the Tibetan Plateau and the jet intensity is reduced evidently compared with that in winter. The EAWJ seasonal evolution is characterized by the obvious longitudinal inconsistency of the northward migration and in-phase southward retreat of the EAWJ axis. A good correspondence between the seasonal variations of EAWJ and the meridional differences of air temperature （MDT） in the mid-upper troposphere demonstrates that the MDT is the basic reason for the seasonal variation of EAWJ. Correlation analyses indicate that the Kuroshio Current region to the south of Japan and the Tibetan Plateau are the key areas for the variations of the EAWJ intensities in winter and in summer, respectively. The strong sensible and latent heating in the Kuroshio Current region is closely related to the intensification of EAWJ in winter. In summer, strong sensible heating in the Tibetan Plateau corresponds to the EAWJ strengthening and southward shift, while the weak sensible heating in the Tibetan Plateau is consistent with the EAWJ weakening and northward migration.     

焰山、高山--内蒙古阿尔山火山群中的两座活火山

阿尔山火山群位于内蒙古自治区东部 ,地处大兴安岭中段西缘 ,地理坐标为 1 2 0°1 4′0 0″～ 1 2 1°1 0′0 0″E ,4 7°1 5′0 0″～ 4 7°4 5′0 0″N。火山构造单元上属大同 -大兴安岭新生代火山活动带 (黄镇国等 ,1 993)。火山活动具多期性 ,可分为上新世、更新世和全新世。火山产物覆盖在侏罗纪火山 -侵入岩之上 ,总体呈北东向展布 ,出露面积约 1 30 0 (km) 2 ,上新世为拉斑玄武岩 ,第四纪主要为碱性橄榄玄武岩。火山作用方式既有岩浆爆破式和溢流式 ,也有射气岩浆喷发。以往区域地质调查 ① ,② 和本次初步考察确定阿尔山火山群由 4…     

格尔木井水温异常特征及其与地震关系分析

简要介绍了格尔木井水温动态观测的环境与条件,在研究正常动态特征和影响因素的基础上,对水温异常的映震关系进行了分析,并成功地进行了一次短临地震趋势预测。探讨了水温异常的形成原因。     

The dependence of response spectrum on the tectonic ambient shear stress field

Introduction The acceleration response spectrum and peak ground acceleration are the necessary and im-portant parameters in earthquake-resistant design at present. They are still active research field. With the increase of digital high accurate strong motion observation data, especially the earth-quakes of Loma Prieta (M=7.0) in 1989; Landers (M=7.3) in 1992; Big Bear (M=6.4) in 1994 and Northridge (M=6.7) in 1994 in USA; Kozani (M=6.6) earthquake and afteshocks in 1995 in Greece; Dinar…