钱塘—钦防古板块结合带及其地质意义

作为扬子、华夏古板块的结合带 ,奠基于四堡—晋宁期形成的陆间造山带 ,表现出有别于两翼而独特的地球物理、地质构造特征。其发展演化主要是伴随华南板块的形成过程 ,历史比较复杂。由于活动性较大、多期次裂谷、造山作用和多期岩浆活动 ,使结合带成为一条深源岩浆活动带。结合带的构造—岩浆—成矿基本特点表明 ,燕山期的成矿作用具“成因多类型 ,定位多部位”特点 ,是一条潜在的巨大弧型斑岩成矿带。     

昆秦接合部造山带非史密斯地层的一些特点——苦海—赛什塘—羊曲构造混杂带剖析

系统论述了昆秦接合部造山带非史密斯地层的特征,应用非史密斯地(岩)层体构造岩片(块)四维裂拼复原原理解剖了羊曲—赛什塘—苦海构造混杂带,提出该构造带为晚华力西期—印支期扬子陆块与柴达木陆块近东西向汇聚过程中形成的陆缘俯冲增生杂岩楔,并对其组成、结构、演化过程等做了初步的总结。     

班公湖—怒江结合带南侧弧-盆系时空结构与演化特征

本文在1：25万邦多区幅、措麦区幅填图成果基础上，运用多岛弧造山模式分析了班公湖—怒江结合带南侧弧-盆系时空结构与演化特征。认为中晚侏罗世—早白垩世，伴随班公湖—怒江洋向南俯冲消亡，其南侧形成多岛弧—盆系的空间配置格局；早白垩世晚期—晚白垩世，残余海盆沉积、闭合消亡及其随后的碰撞造山，完成了班公湖—怒江带南侧弧-盆系时空演化史。     

西昆仑-塔里木盆地盆-山结合带的中、新生代变形构造及其动力学

西昆仑—塔里木盆地盆-山结合带可划分为西昆仑北带和塔里木地块南缘拗陷带(塔南拗陷带)两个构造单元,后者由塔西南拗陷带和塔东南断陷带两部分组成。西昆北带分别以库地—喀什塔什断裂和西昆北冲断裂与西昆中带和塔里木地块南缘拗陷带相隔。盆-山构造经历了长期、叠次的形成、演化过程,但不同时期、不同层次的变形构造具有极大的统一性,总体表现为以西昆中断裂(其主体为库地—喀什塔什断裂)为根带,以北向逆冲扩展作用为主导,向北至塔南拗陷带腹部,逐渐转化为以垂直向上的构造伸展作用为主导。塔南拗陷带的逆冲断裂与具强烈深层流变组构的西昆北逆冲断裂属统一地球动力学系统中不同构造层次的成分,前者是后者向浅层脆性应变域扩展的产物。导致盆-山构造形成的驱动力来自昆仑构造带以南的持续、强烈的北向逆冲扩展作用,至少在塔南拗陷带的前早更新统地层分布区不存在塔里木地块自北向南俯冲的直接证据。西昆仑—塔里木盆地南缘的造盆、造山作用过程可简单地归纳为三个形成演化阶段:晚侏罗世—早白垩世的快速隆升和快速拗陷(沉降)期、晚白垩世—古近纪的深层拆离-缓慢隆升和均匀拗陷(沉降)期和新近纪至今的挤压-急剧隆升和强烈拗陷(沉降)期。造盆、造山作用的动力学过程表明,中—上新世是造盆造山作用机制发生重大转折时期,早更新世末的构造运动基本上奠定了西昆仑—塔里木盆地南缘的盆-山构造格架。     

钦杭何在?来自综合地球物理探测的认识

扬子古板块与华夏古板块的结合带（简称钦杭结合带）是中国东南部一条最重要的构造岩浆成矿带,其西段的位置和边界的划分方法,尚存在较大的争议。本文以大尺度卫星重磁资料为主,结合区域电性和地震资料的综合处理和分析,对钦杭结合带的边界进行了识别和厘定。研究认为,钦杭结合带是江南造山带的南部边界,结合带南界为宁波—金华—上饶南—赣州北—郴州—北海东,北界为上海—湖州—鹰潭—临川—萍乡—衡阳—永州—桂林—梧州—钦州。在结合带两侧,无论是重力场还是磁力场都具有明显不同的特征,反映了扬子和华夏板块不同的物质组成和基底特征。钦杭结合带内地球物理场也存在局部差异,揭示了结合带经过多期次岩浆活动,在不同地段形成了不同组合的金属矿床和别具特色的钦杭成矿带。     

Intercalibration of Mg Isotope Delta Scales and Realisation of SI Traceability for Mg Isotope Amount Ratios and Isotope Delta Values

The continuous improvement of analytical procedures using multi‐collector technologies in ICP‐mass spectrometry has led to an increased demand for isotope standards with improved homogeneity and reduced measurement uncertainty. For magnesium, this has led to a variety of available standards with different quality levels ranging from artefact standards to isotope reference materials certified for absolute isotope ratios. This required an intercalibration of all standards and reference materials, which we present in this interlaboratory comparison study. The materials Cambridge1, DSM3, ERM‐AE143, ERM‐AE144, ERM‐AE145, IRMM‐009 and NIST SRM 980 were cross‐calibrated with expanded measurement uncertainties (95% confidence level) of less than 0.030‰ for the δ^25/24Mg values and less than 0.037‰ for the δ^26/24Mg values. Thus, comparability of all magnesium isotope delta (δ) measurements based on these standards and reference materials is established. Further, ERM‐AE143 anchors all magnesium δ‐scales to absolute isotope ratios and therefore establishes SI traceability, here traceability to the SI base unit mole. This applies especially to the DSM3 scale, which is proposed to be maintained. With ERM‐AE144 and ERM‐AE145, which are product and educt of a sublimation–condensation process, for the first time a set of isotope reference materials is available with a published value for the apparent triple isotope fractionation exponent θ_app, the fractionation relationship ln α(^25/24Mg)/ln α(^26/24Mg).     

基于三对象的三维标度法及其应用

本文介绍了三对象的多维标度法，计算方案是通过一维标度求法和多维标度法把原始问题降至为标准特征值－特征向量问题来解决。该方法的主要目的是提取更多信息，简化数据结构，并重新标度研究对象于新的低维空间，以便能通过二维“因子轴”来直接检验，它适合于定性和定量数据，编写计算程序进行标度分析，在内蒙古赤峰某金矿进行矿产了预测，应用效果良好。     

隧道超前地质预报水平冲击钻探取心技术

隧道超前地质预报是隧道施工中必不可少的环节。在分析目前钻探取心工艺的基础上,结合隧道施工的实际情况,提出采用冲击钻探取心技术来实现隧道超前地质预报。从隧道水平冲击钻进施工设备改进完善和三重管取心钻具研制2个方面来进行研究,通过对现有钻机的改进完善满足了隧道水平冲击钻探取心施工的要求,根据冲击取心钻进的特点,设计出的三重管取心钻具解决了水平冲击钻探取心的难题。多个工程实践应用,水平冲击钻进施工速度快,岩心采取率高,能满足隧道超前地质预报的要求。有望在川藏铁路施工中发挥重要作用。     

Junction and Evolution of the Qinling, Qilian and Kunlun Orogenic Belts

As the main part of the "central mountain system" in the continent of China, the Qinling, Qilian and Kunlun orogenic belts have been comprehensively and deeply studied since the 1970s and rich fruits have been reaped. However, these achievements were mostly confined to an individual orogenic belt and the study of the mutual relationship among the three orogenic belts was obliged to depend on comparative studies. Different views were produced therefrom. The material composition and structural features of the junction region show that there are several epicontinental and intracontinental transform faults developed in different periods. Restricted by these transform faults, the large-scale lateral movements and, as a consequence, complicated magrnatism and tectonic deformation took place in the orogenic belts. According to these features, the authors put forward a three-stage junction and evolution model and point out that there is not a single junction zone traversing from west to east but that the three     

云南宁蒗地区菱形构造格局及其联合构造型式

宁哀地区位于杨子准地台西缘；区域上属南北向川西一藏东构造带，其东为南北向康滇地轴，西为近南北向三江构造带。区域重磁资料反映了基底和盖层由北东向、北西向断裂系组成的区域菱形构造格局，宁蓑地区基本菱形构造格局实属其有机组成部分。因各菱形构造的边界条件及应力状态不同，在研究区内形成了各型联合构造。宁蒗东南区发育宁南菱形构造及其所决定的宁南反凸双弧联合构造。宁南反凸双弧联合构造东弧带追踪基底南北向构造所形成的包都——波罗弧形断裂．是本区重要的喜山期主于控岩控矿构造。