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1.
采用干灰化消解有机粪肥样品,利用ICAP法同时测定B、Be、Ca、Cd、Co、Cr、Cu、Fe、Mg、Mn、Ni、P、Pb、Sr、V、Zn等元素。方法的检出限、准确度、精密度和回收率令人满意。  相似文献   

2.
作物产量与土壤环境的关系   总被引:11,自引:1,他引:10  
曾昭华 《湖南地质》2000,19(1):25-29
作物的产量与土壤元素中N、P、K、Na、Ca、Mg、S、Fe、Mn、Cu、Zn、B、Mo、V、Co、Ni、Cr、Pb、Cd、Hg、Se、F、TI、Ba、Te、Ta、Sr、Ti、Si等元素及稀土、有机质、酸碱度和含水量、含盐量密切有关。  相似文献   

3.
陆琦  周湖云 《矿物学报》1994,14(3):228-233,T001
在山东蒙阴金伯利岩中,首次发现了沂蒙矿类质同象系列新的富Ti矿物(变)种。理想的晶体化学式可表达为:K(Ti5Fe3Cr2Mg2)12O19(简称K-Ti沂蒙矿)(Ba,K)(Ti5Fe4Mg2Cr)12O19(简称Ba-Ti沂蒙矿)从而与原来确定的沂蒙矿K(Cr5Ti3Fe2Mg2)12O19和钡钛铁铬矿(Ba,K)(Cr4Fe4Ti3Mg)12O19g一起构成了金伯利岩中AM12O19磁铁铅矿  相似文献   

4.
X射线荧光光谱法测定大洋多金属结核中多种元素   总被引:18,自引:9,他引:9  
李国会  王晓红 《岩矿测试》1998,17(3):197-202
采用粉末压片和熔融法制样,理论α系数和散射线内标法校正元素间的吸收增强效应,在3080E2型X射线荧光光谱仪上测定多金属结核中的Na2O、MgO、Al2O3、SiO2、P2O5、S、Cl、K2O、CaO、TiO2、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Ga、As、Se、Br、Nb、Zr、Y、Rb、Sr、Pb、Ba、Mo、Tl、La、Ce、Nd、Th、U和W等37种组分。方法经大洋多金属结核标准物质分析验证,其分析结果与标准值符合,具有较好的准确度。经10次重复测定同一样品,方法的精度(RSD,n=10):对大多数主、次组分小于1%;其余痕量元素除As(9%)、Cr(6%)和La(9%)外,均小于5%。  相似文献   

5.
翟世奎 《矿物学报》1995,15(3):360-364
在冲绳海槽海底浮岩的蚀变中SiO2和Na2O相对含量明显减少,而Fe2O3、TiO2、CaO、MgO、CO2、MnO和P2O5含量则明显增加;Al2O3、K2O、FeO含量基本保持不变。蚀变作用导致了赤铁矿、针铁矿和非晶质Fe、Mn氧化物和绿泥石等粘土矿物的生成。多数微量元素的含量在蚀变样品中增加,尤其是Cr、Co、Xc、As、Br、Rb和Th。除Nd外轻稀土元素含量增加,大部分重稀土元素含量减小  相似文献   

6.
X射线荧光光谱法直接测定碳酸盐岩石中主次痕量元素   总被引:12,自引:10,他引:12  
采用粉末样品压片制样,碳酸盐岩石标样及人工合成标样为标准,使用理论α系数及散射线内标法校正元素的吸收_增强效应,用X射线光谱仪对碳酸盐岩石试样中的Na、Mg、Al、Si、P、S、Cl、K、Ca、Sc、Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Ga、Rb、Sr、Y、Zr、Nb、Ba、Pb、La、Ce和Th等30种主次痕量元素进行测定,其分析结果与标样标准值(或化学法值)符合较好,方法的精密度(RSD,n=10)<10%(除含量在检出限附近的元素外),各元素检出限基本满足化探要求  相似文献   

7.
周湖云  陆琦 《矿物学报》1994,14(3):234-240,T001
在山东蒙阴金伯利岩的副矿物蒙山矿中,首次发现了成分为柱红石类的新矿物相。对其成分进行探针分析,其一般晶体化学式可写为:A1.499~1.787B1.548~2.317C5.675~6.354O16。其中A=K、Ba、Na、La;B=Cr、Fe、Mg、V;C=Ti、Zr、Nb等,平均计算化学式为:(K1.256Ba0.241Na0.085La0.046)1.628(Cr1.817Fe0.321Mg0  相似文献   

8.
SOMENEWOPINIONSABOUTTRIASSICGASTROPODASSEMBLAGESINCHINAPanYuntang(GraduateSchol,ChineseAcademyofSciences,Beijing100039)(Rece...  相似文献   

9.
合成了二安替比林基_(2_溴)苯基甲烷(DAoBM)。在Mn(Ⅱ)和吐温_80存在下,Ce(Ⅳ)与DAoBM反应生成有色化合物,λmax为480nm,摩尔吸光系数为31×105L·mol-1·cm-1。Ce(Ⅳ)的质量浓度为0004~02mg/L时符合比尔定律。方法已用于稀土矿石中微量Ce(Ⅳ)的测定,结果与ICP_AES法相符  相似文献   

10.
高分辨10Be记录与黄土地层定年   总被引:6,自引:0,他引:6       下载免费PDF全文
沈承德  易惟熙  刘东生 《第四纪研究》1994,14(3):203-210,211,212,213
利用B/M地磁极性倒转层位0.73MaB.P.时间参考点,通过黄土剖面10Be变化曲线与深海SPECMAPδ18O变化曲线匹配拟合,求得洛川黄土剖面0.75Ma以来的相对连续时标。时标精度约5000—10000a。由于0.15Ma以来洛川剖面加密取样以及10Be、δ18O两曲线之间更好的相关性,10Be相对时标精度与SPECMAPδ10O时标精度大体相同,即3000—5000a。各时期10Be通量与黄土堆积速率之间存在十分好的线性相关关系,展示了一条崭新的地层定年途径。黄土10Be记录35000aB.P.处的Raisbeck峰可被用作地层时间参考点。黄土10Be/(26)Al值、黄土石英中“就地”成因10Be/(26)Al值以及“就地”成因10Be浓度等均可望应用于黄土地层精确定年。  相似文献   

11.
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   

12.
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   

13.
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.)  相似文献   

14.
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   

15.
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   

16.
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.,  相似文献   

17.
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   

18.
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   

19.
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  相似文献   

20.
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.)  相似文献   

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