镀膜金刚石工具中以Fe代Co的胎体配方的试验研究

从分析锯切对金刚石圆锯片胎体性能的要求出发,根据金属材料学的基本理论,确定了提高胎体机械性能的微量元素之后,试验研究了胎体主要成分ＷＣ、Ｆｅ／Ｎｉ、６６３－Ｃｕ;烧结工艺参数中的烧结温度和保温时间等５个因素对胎体综合指标的影响,所研制的胎体配方达到了锯切生产的要求     

大陆科学钻探孕镶金刚石钻头胎体配方的前期研究

在对普通孕镶金刚石钻头高温力学性能检测的基础上,实验研究了６种ＷＣ（Ｗ）基和６种Ｎｉ基配方胎体的高温力学性能,从而提出２种可供研制大陆科学钻探深部高温孔段孕镶金刚石钻头胎体使用的配方方案。     

金刚石刀具胎体配方中以Fe代Co存在的问题分析

本文从胎体金刚石的侵蚀性,胎体对金刚石的包镶力,胎体的耐磨性等三个方面对比分析了以Ｆｅ代Ｃｏ存在的问题,并指出以Ｆｅ代Ｃｏ的关键在应用于镀膜金刚石,即以金刚石表面的碳化膜隔绝铁族元素对金刚石的侵蚀作用,并以碳化物膜作为过渡层实现金刚石与胎体的冶金结构,而胎体的耐磨性则可从优化胎体配方得到解决。     

热压金刚石钻头胎体材料对钻头性能的影响

胎体材料是指胎体材料的成分与配比(简称胎体配方),它是决定胎体性能的内因与根本。现就胎体配方对胎体性能的影响,以及如何改善提高胎体性能等问题进行局部分析(重点谈孕镶钻头胎体)。     

坚硬地层NBS高效孕镶金刚石钻头的研究与应用

介绍了一种NBS高效孕镶金刚石钻头,该类型钻头通过向胎体配方引入一种NBS材料,该材料与胎体结合强度强,晶型锐利,室内微钻试验及野外试验结果显示,该类型钻头可大幅提高钻进中弱风化坚硬岩石的钻进效率,且钻头寿命较以往技术有很大提高。     

加拿大安大略省萨德伯里附近的Ni—Cu冶炼厂关闭20年后土壤化学特征…

近一个世纪以来，萨德伯里地区的自然生态系统受到了不同类型的采矿活动，包括三个Ｎｉ－Ｃｕ冶炼厂生产活动的影响。在１９７２年，Ｃｏｎｉｓｔｏｎ冶炼厂关闭前，由于大量ＳＯ２的排放，使靠近该厂的土壤严重酸化，并含有高浓度的Ｎｉ和Ｃｕ。１９９２年在该地区重复采样并与１９７２年采样的数据对比发现，冶炼厂周围７ｋｍ范围内的土壤中Ｎｉ，Ｃｕ和氢离子的浓度已显著降低。这些土壤中有机物质的低百分数比过去２０年也进一步     

新疆黄山铜镍成矿带中含镍系列矿物组分特征

黄山铜镍成矿带中含镍矿物种类繁多，成分复杂。根据显微镜下鉴定和电子探针成分分析，含镍矿物可分为Ｆｅ－Ｃｏ－Ｎｉ－Ｓ系列；Ｆｅ－Ｃｏ－Ｎｉ－Ａｓ系；Ｆｅ－Ｃｏ－Ｎｉ－Ａｓ－Ｓ系列。由于此类矿物相似的光性较多，本文着重进行了组分特征的研究。     

哈密黄山东铜镍矿床中几个罕见矿物

本文概略地介绍了哈密黄山东Ｃｕ－Ｎｉ矿床产出的地质条件，含矿岩体的Ｓ，Ｎｉ丰度值（Ｗ＿ｓ２８２３×１０￣（－６），Ｗ＿（Ｎｉ）８２９×１０￣（－６）），以及矿石中出现的有趣矿石组构；另外，对新发现的三个罕见矿物（叶碲铋矿、自然铅、锑硫镍矿）的光学性质和化学成分也作了介绍。根据几个罕见矿物的化学成分和矿石组构特征，文章讨论了黄山东Ｃｕ－Ｎｉ矿床的成矿物理化学条件。结论是不宜形成富矿。     

金刚石钻头钴基胎体材料冲蚀磨损的量化研究

金刚石钻头的工作寿命和性能很大程度上取决于胎体材料的性能,国内外对胎体材料的研究主要集中在机械冲刷和井底流场的研究,没有考虑携带岩屑的钻井液对钻头胎体材料的电化学腐蚀以及机械冲刷和电化学腐蚀的相互作用。介绍了胎体材料冲蚀磨损的工作原理,根据试验条件与要求,采用摩擦学和电化学腐蚀原理,设计了模拟现场的冲蚀磨损试验台,对钴基胎体材料进行冲蚀磨损试验并进行了量化。结果表明,胎体材料冲蚀腐损是由纯机械冲刷、电化学腐蚀以及它们共同作用引起。因此,在腐蚀性环境中设计胎体材料,要考虑其抗腐蚀性。     

粉末冶金在探矿工程中的应用

介绍了粉末冶金技术及产品在探矿工程中的应用,回顾了硬质合金钻进的历史;讨论了粉末冶金技术在金刚石钻头制造中的应用,尤其是近几年的进展,综述了钎头用硬质合材料新发展－梯度硬质合金和铁镍代钴硬质合金。     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414.     

Late Wuchiapingian (Late Dzhulfian,early Late Permian) limestone olistolites within the Tertiary flysch of Glypia Unit (Mount Parnon,central–eastern Peloponnesus,Greece)

Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931.     

PALEONTOLOGY

正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.)     

GEOCHEMICAL EXPLORATION

正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.)     

MICROPALAEONTOLOGY

正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.)     

PETROLOGY

正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus.,     

ENVIRONMENTAL GEOLOGY

正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an     

PROSPECTING EXPLORATION

正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of     

OCEANOGRAPHY & MARINE GEOLOGY

正20140582 Fang Xisheng(Key Lab.of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China);Shi Xuefa Mineralogy of Surface Sediment in the Eastern Area off the Ryukyu Islands and Its Geological Significance(Marine Geology Quaternary Geology,ISSN0256-1492,CN37     

ENVIRONMENTAL GEOLOGY

正20141810 Bian Yumei(Geological Environmental Monitoring Center of Liaoning Province,Shenyang 110032,China);Zhang Jing Zoning Haicheng,Liaoning Province,by GeoHazard Risk and Geo-Hazard Assessment(Journal of Geological Hazards and Environment Preservation,ISSN1006-4362,CN51-1467/P,24(3),2013,p.5-9,2 illus.,tables,refs.)