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1.
以５ｃｍ为间隔取得东太平洋５７９４岩心早中新世超微化石软泥须（２４．０６～２２．０６Ｍａ）的５５个样品,用同位素质谱仪、耦合等离子光谱仪和化学溶解当分别对尼中可溶碳酸盐组分的＾８７Ｓｒ／＾８６Ｓｒ、全岩的Ａｌ２Ｏ３和ＣａＣＯ３含量进行了测定。结果显示,＾８７Ｓｒ／＾８６Ｓｒ和ＣａＣＯ３呈反射发育了２个完整旋回和１个半旋回。＾８７Ｓｒ／８６Ｓｒ和ＣａＣＯ３短期旋回具有重要的古海洋学意义：（１）＾８７ 相似文献
2.
矿物3CaO·3Al_2O_3·BaSO_4形成过程研究 总被引：1，自引：0，他引：1
ｅｏｒｅａｎｕ等［１］研究ＣａＯＡｌ２Ｏ３Ｍｘ（ＳＯ４）Ｙ［Ｍ＝Ｍｇ２＋、Ｓｒ２＋、Ｂａ２＋、Ｚｎ２＋、Ｆｅ２＋、Ｆｅ３＋、Ａｌ３］系统中,形成类似于矿物３ＣａＯ·３Ａｌ２Ｏ３·ＣａＳＯ４（硫铝酸钙）的可能性时,报道合成了新矿物３ＣａＯ·３Ａｌ２Ｏ３·ＢａＳＯ４（简写为３ＣＡ·ＢａＳＯ４）;部分学者［２,３］研究过它的胶凝性能等。在有关文献中,研究者制备研究用纯矿物的煅烧条件、获得样品的矿相组成不尽相同。如文献［１］在温度１４００℃保温２４０ｍｉｎ,制备的样品包括铝酸钙（ＣａＯ·Ａｌ２Ｏ３… 相似文献
3.
碳酸盐岩石中痕量金分析方法的研究 总被引：4，自引：0，他引：4
研究了碳酸盐岩石中痕量金的分析方法，提出以适量的ＨＣｌ处理样品，使绝大分碳酸盐岩石分解，然后加入少量活性炭低附可能转入溶液中的Ａｕ，过滤除去Ｃａ＾２＋、Ｍｇ＾２＋等。少量残渣活性炭经灼烧灰化后，用ＨＣｌ－ＮＯ３－ＨＦ－ＨＣｌＯ４溶解，在１ｍｏｌ／ＬＨＣｌ溶液中，用甲基异丁基酮萃取Ａｕ，在日立１８０－８０原子吸收光谱仪上，采用平台在石墨炉原子吸收法测定。方法检出限０．２ｎｇ／ｇＲＳＤ〈３３％。 相似文献
4.
在熔融的２ＰｂＯ．Ｂ２Ｏ３中（９７４Ｋ）,用滴溶量热法测定了２９８Ｋ下由组分Ｋ２ＣＯ３和ＣａＣＯ３形成的复碳酸盐Ｋ２Ｃａ（ＣＯ３）２（它有胶方解石和碳钾钙石两种多型）和Ｋ２Ｃａ２（ＣＯ３）３为－７．２±５．８ｋＪ／ｍｏｌ。同时推算出了复碳酸盐生砀熵变ΔＳｔ。假定具有序结构的胶方解石的ΔＳｔ＝０,则碳钾钙石的生成熵为４０．９±５．１Ｊ／ｍｏｌ．Ｋ,Ｋ２Ｃａ２（ＣＯ３）３为３９．４±７．３Ｊ／ｍｏｌ． 相似文献
5.
离子对色谱测定碱性样品溶液中铬的方法研究 总被引：3，自引：0，他引：3
提出了两种测定碱性样品溶液中铬的离子对色谱方法,第一方法将碱性溶液用Ｈ３ＰＯ４中和,流动相采用含有１５ｍｍｏｌ／ＬＮａ２ＳＯ４的１ｍｍｏｌ／Ｌ四丁基氢氧化铵溶液;第二种方法将碱性溶液用ＨＣｌ中和,流动相采用含有２．５ｍｍｏｌ／Ｌ辛胺和１０ｍｍｏｌ／ＬＮａＳＯ４的ψ＝６％的乙腈溶液。 相似文献
6.
黄土和沉积岩中分离方解石和白云石的方法实验 总被引：12，自引：0，他引：12
采用不同浓度的ＨＣｌ、ＨＡｃ、ＮＨ４Ａｃ及ＮＨ４Ａｃ－ＨＡｃ缓冲深液对典型黄土剖面的黄土样品进行了系统的浸取实验,结果表明,稀ＨＡｃ是分离方解石与白云石的最佳深剂,在浸取实验中对１４种不同元素含量进行测试,多数元素的含量有变化,用稀ＨＡｃ溶液浸取所得的浸取注中＾８７Ｓｒ／＾８６Ｓｒ的测定结果与使用稀ＨＣｌ浸取的浸取液中＾８７Ｓｒ／＾８６Ｓｒ测定值有一定的差别,方法可满足在古气候研究中对不同成因碳酸盐利用的要求。 相似文献
7.
地球化学样品中硒的循序提取技术 总被引：11，自引：0，他引：11
研究开发了一种硒的循序偏提取步骤，将地球化学样品中的硒选择性地循序提取到六个“操作上”定义的相态中：水溶性硒（水提取）；吸附在氧化矿物和粘土矿物上配位可交换的亚硒酸根离子（０．１ｍｏｌ／ＬＫＨ２ＰＯ４提取）；与有机质结合的硒（０．１ｍｏｌ／ＬＮａ４Ｐ２Ｏ７提取）；与铁锰铝氧化物和碳酸盐结合的硒（４．０ｍｏｌ／ＬＨＣｌ提取）；硫化物中的硒（ＫＣｌＯ３＋浓ＨＣｌ提取）；硅酸盐残渣中以副矿物和被硅质包裹的硒微粒存在的硒（ＨＦ＋ＨＮＯ３＋ＨＣｌＯ４强混合酸溶解）。对提取步骤的可行性和实用性作了详细的讨论。 相似文献
8.
等离子体发射光谱法同时测定大洋富钴结壳中硅锰铁钙镁铝钛 总被引：3，自引：0，他引：3
大洋富钴结壳试样经ＨＣｌ＋ＨＮＯ３＋ＨＦ溶解,在０．２ｍｏｌ／ＬＨＦ和０．１３ｍｏｌ／ＬＨ３ＢＯ３介质中,用感耦等离子发射光谱法同时测定Ｓｉ、Ｍｎ、Ｆｅ、Ｃａ、Ｍｇ、Ａｌ、Ｔｉ元素的含量。方法经国家标准物质ＧＢＷ０７２４９大洋多金属结核验证,其结果与标准值相符,精密度ＲＳＤ〈３．２％（ｎ＝６）;已应用于太平洋富钴结壳中多元素分析。 相似文献
9.
基性岩超基性岩中痕量铂的催化极谱测定 总被引：1，自引：0，他引：1
本文针对基性岩超基性岩中ＳｉＯ＿２，Ａｌ＿２Ｏ＿３，Ｆｅ＿２Ｏ＿３，ＭｇＯ，ＣａＯ等含量高的特点，确定了１ｍｏｌ／Ｌ盐酸—０．１ｇ／Ｌ硫酸肼—３×１０￣（－３）ｍｏｌ／Ｌ甲醛底液测定痕量铂的体系，通过控制温度与改进熔矿方法，增强了体系稳定性，消除了ＳｉＯ＿２等的干扰。用于铜镍矿、铬铁矿和硅酸盐管理样的测定，结果符合要求。 相似文献
10.
化学光谱法测定碳酸盐岩石中的14种痕量元素 总被引：1，自引：0，他引：1
研究了测定碳酸盐岩石中Ａｇ、Ｂ、Ｂｅ、Ｃｏ、Ｃｒ、Ｃｕ、Ｇａ、Ｎｉ、Ｐｂ、Ｓｃ、Ｓｎ、Ｖ、Ｚｎ、Ｚｒ等１４种痕量及超痕量元素的化学光谱法。采用２ｍｏｌ／Ｌ ＨＣｌ浸取试样，除去大量碳酸直本，调整ＰＨ８左右，加Ｎａ２Ｓ共沉淀富集各种痕量元素，并以优化过的缓冲剂及水平电极激发、分组进行光谱测定，保证了分析质量，提高了分析灵敏度，使各元素的检出限、精密度和准确度的水平有显著提高，完全满足１：２０万化探碳 相似文献
11.
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
12.
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
13.
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
14.
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
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正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861 相似文献