山东蓝宝石铁离子的价态及其对色调的影响

山东蓝色蓝宝石的着色是由Ｔｉ４＋离子与Ｆｅ２＋离子合理配比而成，一般控制在Ｔｉ４＋／Ｆｅ２＋＝１的配比范围内。多余的Ｆｅ２＋和其它Ｆｅ３＋离子存在都不利于蓝色蓝宝石正常呈色。通过穆斯堡尔谱和电子顺磁共振谱分析，测定了山东蓝宝石中铁离子的不同价态和浓度。对Ｆｅ２＋和Ｆｅ３＋离子所引起的吸收光谱特征作了研究，查明只有Ｆｅ３＋浓度很高时才产生４７７ｎｍ吸收峰，是致使山东蓝宝石表观上呈深蓝带黑色调的的重要原因。     

山东昌乐蓝宝石颜色与化学成分的关系

产于玄武岩中的蓝宝石颜色通常较深,山东昌乐蓝宝石的颜色因其晶体巨大更显得深暗。这类蓝宝石曾多次进行过改色试验,但成效都不大。通过对电子探针对紫外－可见光－近约外吸收光谱图测试结果的分析,并对山东昌乐蓝宝石的颜色与化学成分之间的关系进行研究,结果表明：昌乐蓝宝石的主要致色元素为Ｆｅ,Ｔｉ,Ｃｒ,Ｎｉ等,Ｆｅ２Ｏ＋ＦｅＯ含量高及ＴｉＯ２含量少,以及成对ＦｉＯ２含量少,以及成对Ｆｅ＾３＋的大量存在是其颜     

蓝宝石的顺磁共振研究

有关蓝宝石的顺磁共振研究已有很多报道。在以往的报道中,大多偏向于蓝宝石中Ｆｅ谱线的价态归属和含量高低等方面的研究。而对其中Ｆｅ３＋置换Ａｌ３＋以后有关Ｆｅ３＋的占位特征、畸变程度、磁学性质等有关顺磁共振谱与结构之间的关系,讨论得很少。本文对山东蓝色蓝...     

山东蓝宝石（刚玉）热处理改善研究

本文采用高温热处理法,对山东蓝宝石进行改善实验,其内容主要涉及消除色斑,消除丝状包裹体,减轻蓝宝石发黑（色太深）现象。在此基础上对蓝宝石高温热处理改善机理进行探讨,研究认为：（１）高温环境下通过缺陷传递使晶格中Ｆｅ２＋变为Ｆｅ３＋;（２）恒温时间的变化率为粒径变化率的两倍;（３）降温速率极限为：φ＝ＲＳｆ（Ｔ）ｒ２;（４）改善后蓝宝石总带灰色色调的主要原因是Ｆｅ２＋－Ｆｅ３＋荷移加强和纳米级包裹体数量增加所致。     

蓝宝石主要致色元素与其颜色关系的实验研究

蓝宝石的颜色与主要致色元素的含量及其比值以及形成时的氧逸度有密切关系。本实验选用不同色调的蓝宝石,采用定量控制环境氧逸度的热处理方法,控制蓝宝石中主要致色离子的价态和比例。通过实验研究,获得（１）蓝宝石的颜色、透明度与氧逸度之间的关系曲线;（２）山东昌乐蓝宝石颜色与Ｆｅ、Ｔｉ含量及其比值之间关系曲线。Ｃｒ、Ｎｉ、Ｍｎ等多种杂质元素含量高会导致蓝宝石透明度降低,灰色调显著;（３）发现山东昌乐蓝宝石中存在α－Ｆｅ,它是蓝宝石颜色深,透明度差的重要原因之一。     

中子辐照黄色蓝宝石的色心及谱学特征

采用各种研究手段,对中子辐照黄色蓝宝石的色心及谱学特征进行综合研究,结果表明,中子辐照黄色蓝宝石中存在两类重要的色心,一类属不稳定的空穴色心（Ｍｇ＾２＋＋Ｏ＾－）;另一类则为相对较稳定空穴心／杂质阳离子的复合色心（Ｆｅ＾２＋＋Ｏ＾－／Ｆｅ＾３＋＋ｅ）。上述两类色心的产生,与其内抉同量杂质离子之间有不可分割的内在联系,正是由于它们的联合作用,才导致无色蓝宝石赋色,并产生与之相关的相关的特征吸收谱,荧     

含铁绿柱石的改色机制研究

含铁绿柱石经γ射线辐照或特定温度热处理,可因铁价态的改变引起颜色发生相应变化。处理前后的吸收光谱和顺磁共振谱研究表明,辐作用使隧道位的Ｆｅ＾２＋氧化Ｆｅ％３＋,八一位上的Ｆｅ＾３＋还原为Ｆｅ＾２＋,热处理使隧道位及八面体位Ｆｅ＾３＋均还原为Ｆｅ＾２＋。     

氢化物—原子荧光法测定岩石中痕量硒的干扰及消除

用ＨＦ－ＨＣｌＯ４－ＨＮＯ３混合酸分解样品，采用Ｆｅ＾３＋作释放剂，研究了不同量的Ｆｅ＾３＋与ＨＣｌ酸度对Ｓｅ荧光强度的影响和干扰离子消除的效果，以及Ｆｅ＾３＋存在Ｔｅ存在下对Ｓｅ测定的影响。方法的检出限为０．０１μｇ／ｇ．样品中Ｓｅ量为０．１μｇ／ｇ的相对标准偏差（ｎ＝１１）是５．４％。用于岩石标样中痕量Ｓｅ的测定，结果较好。     

福建明溪蓝宝石的红外光谱研究

福建省明溪的蓝宝石颜色以蓝绿色和黄绿色为主。颜色不均匀,蓝色宝石中常见黄色的色带或色块。二色性明显。在紫外—可见吸收光谱中,明溪蓝宝石的吸收带出现在３７７、３８８、４５１、５１０、５７０、和８１０ｎｍ处。其中黄色主要是由４５１ｎｍ吸收引起的,蓝色与５７０ｎｍ和８１０ｎｍ吸收带有关。蓝宝石具有较高的ＦｅＯ和较低的ＴｉＯ２。ＦｅＯ的平均含量为１－３４％,ＴｉＯ２的含量为０－０７％。电子探针分析没有发现ＦｅＯ和ＴｉＯ２含量与颜色之间有明显的相关性［１］。一些学者曾发现,不同颜色蓝宝石的红外光谱特征有所…     

硬玉的谱学研究

通过白色硬玉和翠绿色硬玉的红外光谱和电子顺磁共振谱的研究,红外光谱表明白色硬玉和翠绿色硬玉均为纯硬玉,只是翠绿色硬玉中还含有少量白云石;ＥＰＲ谱表明,白色硬玉和翠绿色硬玉均存在顺磁性离子Ｃｒ＾３＋和Ｆｅ＾３＋,且占据「ＡｌＯ３」八面体中Ａｌ６＋的位置而进入晶格,说明悲翠的颜色成因由Ｃｒ＾３＋和Ｆｅ＾３＋离子而产生的。     

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.)