矿床及其组合是地壳演化的标志物──右江幔隆的发生、发展与滇黔桂卡林型金矿关系探讨

现代金成矿地球动力学的研究，揭示了矿床及其组合与构造变动、岩浆活动一样，是地壳变革的一个事件，因此从成矿环境地质方面可反演矿床及其组合的形成史，正确划分出与区域地壳演化阶段相适应的矿化类型；滇黔桂卡林型金矿的形成与右江幔隆的发生、发展息息相关，本文借用金成矿地球动力学的一些思想，用地幔隆起的观点分析了本区卡林型金矿的形成。     

Structural Analysis of Jianglang Metamorphic Core Complex in Western Margin of yangtze Crston,Sichuan Province

There is a belt of metamorphic core complexes in the western margin of the Yangtze craton . The geological setting of the belt is similar to that of the Cordilleran metamorphic core complexes . A typical one in this belt is the Jianglang metamorphic core complex , which has a configuration consisting of three layers :a core complex consisting of Mesoproterozoic schist sequence , a ductile middle slab consisting of Paleozoic meta-sedimentary-basalt characterized by the development of "folding layer" and an upper cover consisting of Xikang Group which has suffered both buckling and flattening . A detachment fault developed along the contact boundary between the cover and basement causes the omission of Upper Sinian and Cambrian at the base of cover . A lot of normal ductile shear zones developed in the cover causes the thinning of it . All the features show that the early extension results in the thinning of crust , but the formation of the dome and exposure of basement rocks may be the results of superimp     

柯坪隆起的新构造运动变形及其卫星影像特征研究

新疆塔里木盆地西北缘柯坪隆起的新构造运动非常强烈。通过ＬａｎｄｓａｔＴＭ比值叠加合成影像对新第三纪以来的新构造运动的构造形迹特征进行了解译，并探讨新构造运动的变形机制及其对油气生成运移和聚集的影响。     

造山带高压、超高压变质岩形成和折返的地球动力学研究─—以中国中部为例

秦岭、大别、苏鲁地区是横亘中国中部的复合型大陆造山带，已成为世界高压、超高压变质岩研究的典型地区，在大陆动力学研究中具重要意义。本文综述了该带高压、超高压变质岩的多样性、多期性、区域分带性和形成折返的四种模式，即碰撞外来岩块模式、俯冲－碰撞－逆冲模式、碰撞－走滑转换－逆冲推覆模式和多期多成因复合模式。并指出高压、超高压变质岩的原岩属性、形成时代、ｐＴｔ轨迹、形成深度和岩浆作用等是深入研究形成和折返机制的关键问题。强调以构造为主的多学科综合研究是解决其地球动力作用过程的有效途径。     

山西省大同盆地砂板梁新隆起的变形位移及其成因

本文研究了大同盆地内部砂板梁新隆起的变形位移特征和类型。变形位移在不同类型的沉积物中表现形式不同,主要有:(1)基岩与粘土接触带的断层位错;(2)砂砾层中砾石的旋转位移,使砾石长轴平行于变形带定向排列;(3)砂层中砂粒的粒间旋转位移;(4)粘土层中的柔性变形,但当粘土含水率较低时,则表现为脆性变形。由此,造成了砂板梁西北侧实测剖面上总位移量与断层累积位移量的差异。最后用几何学方法探讨了伸展环境下砂板梁的隆起机制,结果与实际情况相符。     

江南隆起上的下古生界缺失带──华南加里东前陆褶冲带的标志

华南的主造山事件发生在加里东期。由于中生代同一方向薄皮冲断作用的叠加和改造，早古生代的碰撞构造格局已不清楚。江南隆起核部存在一下古生界缺失带，它平行隆起走向线状分布，空间上分开了西北的扬子型地层和东南的江南型地层区，晚古生代浅海碳酸盐平缓超覆其上。由于早古生代时江南隆起位于扬子陆块东南的大陆斜坡部位，当时曾普遍接受沉积，上述线状地层缺失带应属造山变形产物，可能标示着加里东期造山带的前陆褶冲带的位置。     

Alpine metamorphism in the south-east Tauern Window, Austria: 2. Rates of heating, cooling and uplift

Abstract Existing geochronological data are reviewed and new Rb-Sr, K-Ar and ³⁹Ar–⁴⁰Ar ages are presented, including a suite of 33 mica ages from a 20 km north–south tunnel section. These data are discussed in relation to the thermal history from the overthrusting of the Autroalpine nappes c. 65 Myr ago to the present. The earliest phase of metamorphism, involving lawsonite crystallization, is associated with emplacement of these nappes. Subsequently, temperatures in the rocks beneath rose, at a mean rate of 3–6°C/Myr, until the climax of metamorphism.
At high structural levels, published data indicate an age > 35 Myr for the metamorphic climax. In contrast, a new ³⁹Ar–⁴⁰Ar step-heating age of 23.8 ± 0.8 Myr on amphibole, from near the base of Peripheral Schieferhülle, closely approximates the age of metamorphism and provides the first clear indication that the climax of metamorphism occurred later at deeper structure levels. Following the climax, near-isothermal uplift and erosion reduced pressure to c. 1 kbar before white mica closure at 19 Myr; this implies uplift at >3 mm/yr.
Along the tunnel section, white mica K-Ar ages vary systematically from 24 Myr to 16.5 Myr with position relative to a late 4 km amplitude dome whereas biotite Rb-Sr ages are uniform at 16.5 Myr across the whole profile; doming is thus dated at 16.5 Myr with transient uplift rates >5 mm/yr. At other times uplift rates were <1 mm/yr.