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1.
煤矸石合成莫来石熟料研究 总被引：4，自引：0，他引：4
研究了煤矸石加氢氧化铝及氧化铝合成莫来石熟料的可行性。实验表明,采用煤矸石和氢氧化铝可在１５００℃完成莫来石化反应,到１５５０℃可得到接近理论密度的莫来石熟料,采用煤矸石和工业氧化铝反应,可在１５５０℃全部合成莫来石,到１６００℃可得到接近理论密度的莫来石熟料,采用煤矸石加α－Ａｌ２Ｏ３所得样品性能良好,化学成分最纯。 相似文献
2.
高岭石—莫来石反应系列：^27Al和^29SiMAS NMR研究 总被引：21，自引：2，他引：21
根据艰我国八个不同成因和特征的高岭土样品在４５０－１４５０℃热处理产物的ＭＡＳ ＮＭＲ谱和ＸＲＤ，ＩＲ，ＤＴＡ等研究结果，结合有关资料讨论了高岭石－莫来石反应序列的几个重要问题：１．高岭石的结构，尤其是五配位铝；２．９８０℃放热峰后的高温相是γ－Ａｌ２Ｏ３而不是Ａｌ－Ｓｉ尖晶石；３．对于莫来石化过程，认为初始莫来石８５０－９５０℃变高岭石形成，二次莫来石由分凝的ＳｉＯ２和γ－Ａｌ２Ｏ３在１２００－ 相似文献
3.
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
4.
豫西上宫构造蚀变岩型金矿成矿过程中的流体—岩石反应 总被引：31，自引：8，他引：23
上宫金矿赋存在中元古界熊耳群安山岩和玄武岩中,矿体受断裂破碎带控制。含矿热液在迁移过程中,与围岩发生了强烈的流体－岩石反应,造成Ａｕ、Ａｇ、Ａｓ、Ｓｂ等成矿及其相关微量元素和Ａｌ２Ｏ３、ＴｉＯ２、Ｎａ２Ｏ等常量元素含量增加,稀土元素及其总量急剧减少。流体－岩石反应第一阶段发生的温度和压力条件为３６５℃～３００℃和２８５～２００ＭＰａ,而大量金沉淀成矿时的温度和压力范围则分别为３２５℃～２４０℃和１６０～１００ＭＰａ。成矿热液类型及其演化比较简单,从初始的低盐度（９．５％～６．３％ＮａＣｌ）、ＸＣＯ２为０．１８～０．２４的含ＣＯ２流体演化为低盐度（５．９％～１．６％ＮａＣｌ）的水溶液流体。流体－岩石反应是造成上宫金矿金沉淀成矿最主要的原因 相似文献
5.
坯样中SiO2与Al2O3对电瓷制品机械强度的影响 总被引：3，自引：0，他引：3
机械强度是电瓷制品的主要性能之一,与坯料中Ａｌ２Ｏ３与ＳｉＯ２质量分数有密切关系,本次试验结果表明,随着坯料中Ａｌ２Ｏ３质量分散的增加,ＳｉＯ２质量分数的减少,电瓷制品的抗折强度,抗冲击强度也相应提高,本文对其产生机理进行了较详细的讨论。f 相似文献
6.
建平烧锅营子金矿流体包裹体特征研究 总被引：2，自引：0，他引：2
对烧锅营子金矿石英流体包裹体进行了详细研究。流体包裹体均一温度为２８０℃～３２０℃、爆裂温度为２４０℃～２９０℃。成矿流体富含Ｎａ＋、Ｋ＋、Ａｕ＋、Ｃｌ－、Ｈ２Ｏ和ＣＯ２。金以ＡｕＣｌ－形式存在于成矿流体中。ＣＯ２含量与金矿化强度呈正相关。成矿流体ｐＨ值为５．３１～５．５３。成矿流体呈弱酸性、低盐度、低密度、相对氧化环境。 相似文献
7.
浙西石炭纪层状硅质岩地球化学特征及其意义 总被引：7，自引：0，他引：7
在浙西石炭纪地层中存在与地层整合产出的层状硅质岩。硅质岩中ＦｅＯ、ＭｎＯ、ＴｉＯ２、Ａｌ２Ｏ３、ＭｇＯ、ＣａＯ、Ｎａ２Ｏ、Ｋ２Ｏ等含量相对较高，富集Ａｓ、Ｓｂ、Ｂｉ、Ａｕ、Ａｇ、Ｇａ，Ｆｅ２Ｏ３／ＦｅＯ、ＳｉＯ２／Ａｌ２Ｏ３、ＳｉＯ２／（Ｎａ２Ｏ＋Ｋ２Ｏ）、ＳｉＯ２／ＭｇＯ比值较小，稀土元素总量低，Ｃｅ弱负异常，重稀土相对富集，包裹体富含气相组份ＣＨ４、ＣＯ２、Ｎ２、ＣＯ、Ｈ２，具热水沉积硅质岩的地球化学特征。在Ｆｅ—Ｍｎ—（Ｎｉ＋Ｃｏ＋Ｃｕ）三角图及ＳｉＯ２—Ａｌ２Ｏ３、ＳｉＯ２—Ｆｅ２Ｏ３图上均属于热水沉积硅质岩。硅质岩中硅、氧同位素也显示其热水成因之特点。硅质岩的硅同位素和稀土元素Ｃｅ／Ｃｅ※值表明本区层状硅质岩主要是在浅海环境下沉积的。硅质岩的形成温度较高，为９８℃～１５２℃ 相似文献
8.
9.
晋豫铝土矿的物质组分及矿石可用性研究 总被引：4，自引：0，他引：4
晋豫铝土矿属－水硬铝石型，主要物质组分是－水硬铝石，高岭石，伊利石和绿泥石，其中伊利石和绿泥石是主要的有害杂质。在晋北区的某些矿石呈，可以出现一定数量的一水软铝石。晋北区矿石以ＡｌＯ３含量料低，粘土物总量高、可磨性差为特点；平陆豫西区以Ａｌ２Ｏ３含量高、粘土物质总量低，可磨性好和预脱硅效率低为特点。 相似文献
10.
25—200℃氯化钠溶液中金配合物的喇曼光谱研究 总被引：5，自引：0，他引：5
用高温喇曼光谱技术测定了０．０５ｍｏｌ／ｋｇ Ａｕ和１ｍｏｌ／Ｌ ＮａＣｌ中性水溶液中的金所配合物及其结构。结果得出，２５－１５０℃溶液中闰面正方形结构的ＡｕＣｌ３（ＯＨ）＾－占优势，当在１５０℃以上时ＡｕＣｌ３（ＯＨ）＾－发生酸化脱水，生成ＡｕＣｏ＾－４，它在高温时有由平面正方形结构歧变为四面体结构趋势。 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.
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
13.
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
14.
Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
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. 相似文献
15.
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.) 相似文献
16.
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.) 相似文献
17.
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.) 相似文献
18.
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., 相似文献
19.
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 相似文献
20.
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 相似文献