洱海近代沉积物中碳-氮-硫-磷的地球化学记录

在＾２１０Ｐｂｅｘ和＾１３７Ｃs计年基础上,对采自洱海深水湖区沉积物柱芯进行了Ｃ ｉｎｏｒｇ（无机碳）、Ｃｏｒｇ（有机碳）、Ｎ、Ｓ含量和Ｐ开矿分析。Ｃｏｒｇ生趣剖面具“沉降－降解－堆积”三阶段分布特征,沉降和堆积通量分别为１２．７ｇ／（ｍ＾２．ａ）和７．２０ｇ／（ｍ＾２．ａ）;降解速率常数为０．０１７ａ＾－１,寄宿时间为４０a。Ｎ的生趣分布与Ｃｏｒｇ相似,沉降和堆积通量分别为２．６２ｇ／（ｍ＾２．ａ     

塔里木盆地的大地热流

根据１７个稳态顺序测湿数据和７个井温测井及静温数据计算的地温梯度，及２２０余块岩石导率的实测数据，分别计算了１７个实测热流值和７个估算值。它表明塔里木盆地的大地热流值多在４０－５０ｍＷ／ｍ＾２，其中以盆地中部为最高，可达６５－７２．３ｍＷ／ｍ＾２，北部多在４０－４５ｍＷ／ｍ＾２，西部边缘及西南部热流值偏低，分别为３５－４０ｍＷ／ｍ＾２和３０－３５ｍＷ／ｍ＾２。盆地的平均热流值为４４．０５ｍＷ／ｍ＾     

胶南造山带及邻近地区的重磁场特征及地质解释

胶南造山带的重磁场特征为一条醒目的重力低、磁力高值带，走向北东－西南，陆上部分长约４５０ｍ，宽４０－７０ｋｍ。其重磁场值一般为０×１０＾－５ｍ／Ｓ＾２－２０×１０＾－５Ｍ／ｓ＾２、０－３００ｎＴ，反映胶南造山带的轮廓及带内低密度的早元古代晋宁期花岗岩基和中强磁性的中性代燕山晚期岩浆岩的分布。     

华北中元古代火山岩Sm—Nd同位素年代及其构造环境的地球化学依据

由于缺乏合适的测年对象，华北地区中上元古界的年龄值主要是从沉积财及脉岩中获得。该文据近来从辽北中元古界凡河群中识别出的一套同期喷发玄武岩，获得其Ｓｍ－Ｎｄ等时线年龄为１１９９±３９Ｍａ．ＦｅＯ（全－ＭｇＯ，Ｔｉ／１００－Ｚｒ－Ｙ．３，ＴｉＯ２－Ｋ２Ｏ－Ｐ２Ｏ５，ＴｉＯ２－Ｙ／Ｎｂ和ＴｉＯ２－Ｚｒ图解指地了其大陆内部的裂谷构造环境。＾８７Ｓｒ／＾８６Ｓｒ＝０．７０３０，ε＾（Ｔ）Ｎｄ＝－９．５－１１     

珠江口沉积柱样^210Pb法年龄测定结果及其环境地球化学意义

提供了珠江河口及河道１０个沉积柱＾２１０Ｐｂ法的ＣＦ模式（稳恒放射性通量模式）和ＣＡ模式（稳恒初始放射性模式）的年龄测定结果,并据此讨论珠江三角洲近百年来沉积环境的演化,研究结果表明,西江河道和珠江广州河道１９８０年以前沉积速率为０．５－１．０ｃｍ／ａ．１９８０年以后沉积速率增长加快,９０年代达到４－６ｃｍ／ａ,沉积通量为４－６ｇ／（ｃｍ＾２．ａ）河口沉积速率逐年增长趋势,但一般比河道柱样小得多,     

2—胂酸基—4—甲基苯基重氮氨基偶氮苯与镍的显色反应研究及应用

作者将新合成的显色剂２－胂酸基－４－甲基苯基重氮氨基偶氮苯用于Ｎｉ的分光光度分析。在ｐＨ１１．２的Ｎａ２Ｂ４Ｏ７－ＮａＯＨ缓冲介质中，非离子型表面活性剂ＯＰ存在下，试剂与Ｎｉ（Ⅱ）生成组成为２：１的稳定红色配合物，其最大吸收波长位于５３８ｎｍ，表观摩尔吸光系数ε５３８＝１．９２×１０＾５Ｌ．ｍｏｌ＾－＾１．ｃｍ＾－＾１，Ｎｉ量在０－０．３２μｇ／ｍｌ范围符合比尔定律。用该法测定了铝合金及硫化镍矿石     

云南大硐厂铅锌矿床中的硫碲铋矿A

硫碲铋矿Ａ产于云南省大硐厂铅锌矿床，与自然铋、辉铋铅矿共生。晶体呈柱状，粒度０．０２￣０．３ｍｍ。反光显微镜下呈淡黄色，弱非均质性，反射率Ｒｃ′＝５２．４％，Ｒ０＝４８．８％（波长为５４０ｎｍ），显微压入硬度Ｈｖ＝４６￣７２ｋｇ／ｍｍ＾２。主要粉晶谱线：３．０６５（１０），２．１２０（７），１．３４６（５），２．２２０（４）。三方晶系，空间群为Ｄ３ｄ＾５－Ｒ３↑－ｍ，晶胞参数ａ＝０．４２４１ｎｍ，     

2,4—二溴—6—羧基苯重氮氨基偶氮苯光度法测定痕量铊的研究

研究了新试剂２，４－二溴－６－羧基苯重氮氨曲偶氮苯与Ｔｌ（Ⅲ）的高灵敏显色反应。在非离子表面活性剂ＴｒｉｔｏｎＸ－１００存在下，于ｐＨ１０．５的ＮＨ３．Ｈ２Ｏ－ＮＨ４Ｃｌ缓冲介质中，Ｔｌ（Ⅲ）与该试剂生成红色配合物，其配合物的最大吸收波长位于５２０ｎｍ处，摩尔吸光系数为１．８３×１０＾５Ｌ．ｍｏｌ＾－＾１．ｃｍ＾－＾１。Ｔｌ（Ⅲ）量在０－０．６４μｇ／ｍｌ范围内符合比尔定律。方法用于废水中痕量Ｔｌ     

含油气性水化学特征指标及评价模型研究

由灰色关联分析、模糊聚类结果，提取出反映四川盆地水化学主要特征的最有效特征指标：二叠系为三维荧光指纹图形、顶空气总烃与重烃、矿化度、Ｎａ＾＋含量、Ｃａ＾２＋／Ｃａ总、Ｍｇ＾２＋／Ｍｇ总；上三叠统为三维荧光指纹图形、顶空气Ｃ１－Ｃ３的Ｄ函数、Ｌｉ＾＋／Ｎａ＾＋、矿化度、Ｃａ＾２＋／Ｃａ总、Ｍｇ＾２＋／Ｍｇ总、Ｎａ＾＋含量。由上述特征指标及成因指标δ＾１８Ｏ、水溶甲烷δ＾１３Ｃ，构成了天然气保存的水化     

双指示催化光度法测定天然水中痕量锰

研究表面活性剂在下双指示动力学法测定痕量锰的新方法，考察了测定条件。方法灵敏度较高，ε＝７．８×１０＾７Ｌ．ｍｏｌ＾－１ｃｍ＾－１．ＲＳＤ＝２．７％。已用于天然水中痕量锰的测定。     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

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).     

HYDROGEOLOGY

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     

METAMORPHIC PETROLOGY

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),     

SERIALS

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GEOPHYSICAL EXPLORATION

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-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

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-     

PETROLEUM GEOLOGY

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.)     

GEOCHEMISTRY

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     

ENGINEERING GEOLOGY

正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.)     

HISTORICAL GEOLOGY & STRATIGRAPHY

正20140985Chen Liang(Post-Doctoral Research Station of Mining Engineering,School of Nuclear Resources and Nuclear Fuel Engineering,University of South China,Heng-yang 421001,China);Huang Wei Composition of Major and Correlated Elements with Organic Matters and Paleoclimatic Implication for Lower Paleogene Sediments in Sanshui Basin