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| 1 | 北祁连山榴辉岩锆石SHRIMP定年及其构造意义显示文摘应用阴极发光和离子探针技术,对北祁连山高压变质带两个榴辉岩样品中的锆石进行了结构和形态学观察以及原位U-Pb定年。所获得的年龄值分别为463±6和468±13 Ma,代表了本区榴辉岩相变质时代。这是北祁连山加里东期高压变质作用的最早记录,可能代表了大洋板块俯冲进入上地幔经受榴辉岩相变质的时间。 | 宋述光 张立飞 Y.Niu 宋彪 张贵宾 王乾杰 | 2004 | 科学通报2004，49，6： | 60 |
| 2 | 青藏高原北缘早古生代板块构造演化和大陆深俯冲显示文摘青藏高原北缘北祁连山和柴达木盆地北缘分别发育有2类不同的高压和超高压变质带。北祁连山为典型的环太平洋型俯冲带,榴辉岩锆石的SHRIMP年龄为464Ma±5Ma。而柴北缘为典型的大陆俯冲型变质带,片麻岩锆石中的柯石英证明柴北缘是一超高压变质带。石榴橄榄岩中的超硅石榴子石和橄榄石中的钛铁矿等出溶反映其形成深度大于200km。柴北缘榴辉岩的原岩具有MORB和OIB的特征,并与北祁连山榴辉岩的年龄相同,代表早古生代祁连洋俯冲变质的时代。而含柯石英片麻岩的锆石和石榴橄榄岩超高压变质年龄均为423Ma,代表大陆地壳深俯冲发生的时间。北祁连山和柴北缘很可能是一个俯冲带从大洋俯冲到大陆碰撞的不同阶段的产物。 | 宋述光 张立飞 Y.Niu 宋彪 刘墩一 | 2004 | 地质通报2004，23，9： | 38 |
| 3 | Sulphidation of Fe-Nb,Co-Nb and Ni-Nb Alloys in H_2-H_2S at 700℃显示文摘The corrosion of alloys based on Fe,Co and Ni containing 15 and 30 wt-% Nb was studied at 700℃in H2-H2S mixtures providing 10-8 atm S2.The Fe and Co-based alloys formed duplex scales withan outer layer of pure base-metal sulphide and an inner layer containing both metals.The Nb addi-tions were not able to produce exclusive Nb sulphidation but yielded a significant decrease of thecorrosion rates for both types of alloys with respect to the pure metals even though they were stillmuch higher than that of pure Nb.The Ni-base alloys corroded rapidly forming a single complexscale layer,mainly due to the appearance of a liquid Ni-S solution. | F.Gesmundo F.Viani Y.NIU | 1993 | Journal of Materials Science & Technology1993，9，3： | 0 |
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