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通过对CE3玉兔号月球车粒子激发X射线谱仪（APXS）获取的数据进行处理,获得测点的累积特征X荧光计数率谱线,经小波滤波,消除放射性涨落对X荧光谱线的影响。由能量刻度获得了月球车着陆点月壤元素X射线特征能量峰,由此分析了着陆点月壤元素的成分,得知测量点月壤元素成分包括Si、Ca、Al、Mg、K、P、S、Fe、Ti、Ni、Cr、Mo、Sr、Y、Zr、Nb。研究结果为月陆地质演化提供了有利的参数制约。 相似文献
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应用熔融制样X射线荧光光谱法测定锆英砂中的锆,通常采用Zr Kα线,而采用Zr Kα线作为分析线对熔融片来说并未达到饱和厚度,因此Zr的线性差,测定结果误差大。本文采用波长色散X射线荧光光谱法测定锆英砂样品中锆铪硅铝钙钛铁镁钠铪磷锰等12种组分。重点研究了锆分析谱线的选择,通过理论计算熔融片中Zr Kα线的饱和厚度为6638 μm,而Zr Lα线的饱和厚度为20 μm。由于熔融制备样片厚度为2500 μm,在熔融片中Zr Kα线远未达到饱和厚度,因此测定锆时应用Zr Lα谱线取代文献中应用的Zr Kα谱线。采用Zr Lα线,校准曲线的标准偏差（RMS）为0.39,而Zr Kα线的RMS为1.03,ZrO2分析结果的准确度和精密度有了显著的提高。对于锆,Hf Lα和Hf Lβ线饱和厚度分别为971 μm、1444 μm,由于Hf Lα1谱线与Zr Kα二次谱线重叠,因此测定铪时应用Hf Lβ线作为分析线。实验还对四硼酸锂-偏硼酸锂混合熔剂、熔样比例和熔样温度等实验条件进行了优化,使用理论α系数和经验系数法校正基体效应,各元素计算的检出限与实际能报出的结果基本一致,方法精密度（RSD）为0.1%~10.9%,各元素的测定值与化学法测定值相符,表明通过饱和厚度的计算确定的锆和铪测定谱线具有可行性。 相似文献
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铜转炉渣中钴的载体矿物在酸解中的行为 总被引：2，自引：0，他引：2
用光学显微镜、X射线衍射谱、扫描电子显微镜、X射线能谱和X射线波谱并辅以化学物相分析进行了铜转炉渣及其加工产物的工艺矿物学研究。查明了铜转炉渣主要由铁橄榄石和铁酸盐（磁铁矿）以及少量玻璃相组成，铜呈冰铜相主要嵌布于铁酸盐之间，钴则主要以类质同象形式取代铁橄榄石和磁铁矿晶格中部分Fe^2 ，作为氧化物富集其中。在酸解中铁橄榄石和铁酸盐均发生分解，使冰铜相得以解离，铁和钴则转化为可溶性硫酸盐，随后被浸出。铁酸盐分解不完全是影响钴浸出率的主要原因。 相似文献
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X射线能谱分析中谱线重叠问题 总被引：1，自引：0，他引：1
扫描电子显微镜上配接Si(Li)探测器X射线能谱仪,进行地质样品分析时,由于它的峰,背比值较低和谱线分辨率不如X射线波谱仪,尽管探测效率很高,仍然存在谱线的干扰或重叠现象。谱线的干扰或重叠现象主要划分为三个类型:相邻或相近元素同一线系(K、L、M)的谱线之间重叠;原子序数较低的K线系谱线与原子序数较高的L线系谱线之间的重叠;原子序数较低的K线系谱线与原子序数高的L线系谱线以及原子序数高的M线系谱线之间的重叠。为了保证X射线能谱分析中定性分析的准确性,本文介绍了辨认和处理干扰或重叠谱线的技巧。 相似文献
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闪锌矿中结构铁的X射线衍射定量分析 总被引：1，自引：0，他引：1
闪锌矿中的铁包括结构铁和以六配位形式存在的出溶铁,本文提出了应用Ｘ射线衍射测定闪锌矿中结构铁质量分数的新方法。通过对一系列不同结构铁质量分数闪锌矿的主要衍射线强度的理论计算发现,随着闪锌矿中结构铁质量分数的增加,其主要衍射线强度比值Ｉ（００２）／Ｉ（１１１）,Ｉ（１３３）／Ｉ（１１１）,Ｉ（１３３）／Ｉ（１１３）和Ｉ（００２）／Ｉ（１１３）逐渐递减,尤以Ｉ（００２）／Ｉ（１１３）比值递减最为明显,两者几乎呈线性负相关。利用该原理对国内典型铅锌矿床中闪锌矿的结构铁质量分数进行了测定,并与化学分析结果进行对比。 相似文献
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土壤铁锰结核中锰矿物类型鉴定的探讨 总被引：5，自引：1，他引：4
用化学选择溶提、X射线衍射 (XRD)等技术 ,对土壤铁锰结核中锰矿物类型的鉴定进行了探讨。结果表明 :根据 0 .1mol·L-1盐酸羟胺 (HAHC)处理前后土壤铁锰结核的XRD峰的变化 ,可鉴定出其所含的锂硬锰矿和钙锰矿 ;分析HAHC处理前后同一XRD谱线上不受锰矿物干扰的相邻层状硅酸盐矿物衍射峰与所含锰矿物衍射峰强度的比值变化 ,确定了水钠锰矿的存在 ;结合铁锰结核中与锰矿物类型相关的元素含量 ,可鉴定出其所含的钡硬锰矿和铅锰矿。 相似文献
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X射线荧光光谱法测定铝矿石中主次痕量组分 总被引：11，自引：9，他引：11
采用熔融玻璃片和粉末压片法制样,选用国家标准样品和人工合成标准样品,用经验α系数和散射线内标法校正元素间谱线重叠干扰和基体效应,使用Magix（PW 2403）X射线光谱仪对样品中的Al2O3、SiO2、Fe2O3、TiO2、K2O、Na2O、CaO、MgO、P2O5、MnO、S、Pb、Zn、Sr、Zr、V、Ga和Cr等组分进行测定,分析结果与标准值或化学法相符,12次测定的相对标准偏差小于10%. 相似文献
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本文利用穆斯堡尔谱仪，X射线衍射等方法研究了新疆铁陨石。新疆铁陨石主要由体心立方的铁纹石及立方面心的镍纹石组成，此外还有极少量的其他矿物。新疆铁陨石中镍含量分布不均匀，并且铁限石中的铁都是零价的。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
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. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献