汞元素的石油地质意义     

李广之  袁子艳  庄原  江浩 《物探与化探》2008,32(2):143-146,185

油气中都含有汞元素组分,汞的物理化学性质决定其可以从油气藏中向上垂向运移,根据采样介质类型及样品预处理的手段不同,地表中汞的分析方法可分为壤气、热释汞及土壤总汞分析方法。壤气汞、热释汞及土壤总汞指标都有着很好的示油气意义,同时也有着示断裂带的地质意义。  相似文献   

黔西北威-赫-纳-织-水地区铅锌(铜)矿带上 重力异常反映的地质信息   总被引：4，自引：1，他引：3  

王亮  乔计花  龙超林 《物探与化探》2008,32(4):374-378

研究黔西北威宁—赫章—纳雍—织金—水城地区,铅锌(铜)矿带上分布的1∶20万区域重力异常特征,及其与地质、构造、岩体、化探等异常的对应规律及其关系,能对该区此类矿产的成矿规律、成矿部位和成矿特点的研究有所帮助,提出下一步找矿方向上的参考建议。  相似文献   

SNT地区氡法勘查砂岩型铀矿的应用效果     

叶庆森  唐智源  肖磉  巢小林  范少云  肖建军 《物探与化探》2008,32(5)

为了减小我国北方隐盲型砂岩铀矿找矿中钻孔布设的盲目性,实现快速评价,在二连盆地SNT地区开展了土壤氡法寻找砂岩型铀矿工作。经测量数据的统计处理,在测区内固定了有一定规模的氡异常晕6个。通过氡异常评价并结合该区地质、地球物理和地球化学条件,预测了3个远景段,经钻探在其中的一个远景段中发现了砂岩型铀矿化,表明在我国北方中一新生代盆地中开展土壤氡法寻找隐盲型砂岩铀矿是有效且可行的。  相似文献   

黑龙江省中部森林沼泽区金在土壤A层中的富集规律     

胡忠贤  程志中  王学求 《物探与化探》2008,32(1):33-35

探讨了金在黑龙江省中部森林沼泽区A层土壤-10～+60目、-60～+100目、-100～+160目及-160目粒级中的含量分布特征和富集规律。经对比研究认为,-100目可以满足低密度深穿透地球化学详细测量采样要求,该粒级能够有效地发现异常。  相似文献   

Benthic nutrient fluxes in the intertidal flat within the Changjiang （Yangtze River） Estuary   总被引：1，自引：0，他引：1  

GAO Lei    LI Daoji  WANG Yanming  YU Lihua  KONG Dingjiang  LI Mei  LI Yun  and FANG Tao State Key Laboratory of Marine Geology  Tongji University  Shanghai  China State Key Laboratory of Estuarine  Coastal Research  East China Normal University  Shanghai  China 《中国地球化学学报》2008,27(1):58-71

In an annual cycle from March 2005 to February 2006, benthic nutrient fluxes were measured monthly in the Dongtan intertidal flat within the Changjiang （Yangtze River） Estuary. Except for NH4^＋, there always showed high fluxes from overlying water into sediment for other four nutrients. Sediments in the high and middle marshes, covered with halophyte and consisting of macrofauna, demonstrated more capabilities of assimilating nutrients from overlying water than the low marsh. Sampling seasons and nutrient concentrations in the overlying water could both exert significant effects on these fluxes. Additionally, according to the model provided by previous study, denitrification rates, that utilizing NO3- transported from overlying water （Dw） in Dongtan sediments, were estimated to be from -16 to 193 μmol·h^-1·m^-2 with an average value of 63 μmol·h^-1·m^-2 （n=18）. These estimated values are still underestimates of the in-situ rates owing to the lack of consideration of DN, i.e., denitrification supported by the local NO3^- production via nitrification.  相似文献   

Distribution Characteristics of Sulfur and the Main Harmful Trace Elements in China’s Coal     

TANG Shuheng  SUN Shenglin  QIN Yong  JIANG Yaof  WANG Wenfeng 《《地质学报》英文版》2008,82(3):722-730

To promote the rational development and use of clean coal resources in China, data on the regional and age distribution of sulfur, arsenic and other harmful elements in Chinese coal was broadly collected, tested for content, and analyzed. Coal in northwestern China is characterized by low to extremely low levels of sulfur; the coal of the Taiyuan Formation in northern China mainly has high-sulfur content; that of the Shanxi Formation is mainly characterized by low sulfur coal; and the Late Permian coal in southern China has overall higher sulfur content; other regions have low sulfur coal. The average content of harmful trace elements in the bulk of China＇s coal is similar to the corresponding content in the coal of the North America and the rest of the world, whereas the content of various elements （Hg, Sb and Se） is different in magnitude to the corresponding percentage in the crust. The average content of the elements Cr, Se, Co, Be, U, Br in Late Permian coal in S China ranks first in the country whereas the average content of Hg and CI in the coals of Late Carboniferous to Early Permian age in N China are the highest. The average content of Mn in Early and Middle Jurassic coal is higher in NW China. The high content of harmful elements in some coal should cause particular concern both in the development and utilization of coal.  相似文献   

Multifractal Analysis of Element Distribution in Skarn-type Deposits in the Shizishan Orefield, Tongling Area, Anhui Province, China   总被引：3，自引：1，他引：2  

Wang Qingfei  Deng Jun  Wan Li  Zhao Jie  Gong Qingjie  Yang Liqiang  Zhou Lei  Zhang Zhijun 《《地质学报》英文版》2008,82(4):896-905

A series of element concentrations sampled from four drill cores with a length about 1000 m into different skarn-type deposits were selected from the Shizishan orefield, central Tongling, southeastern part of Anhui Province. Using the multifractal method, the distribution and migration characteristics of the major and trace elements are analyzed. The multifractal spectrum of the major elements is left-skewed, whereas the spectrum of the trace elements is right-skewed, which shows that in the process of skarn formation, the trace elements were enriched only locally, and major elements transported within a much larger range. The correlation coefficients of the multifractal parameters Aa （width of the multifractal spectrum） of the four drill cores are relatively low, but the correlation coefficients of the multifractal parameters R （spectrum symmetry parameter） and Af are relatively higher, indicating that although the non-homogeneous intensity of the distribution of elements is inconsistent, their spatial accumulation patterns are almost the same during the ore-forming process. The statistics of the mnltifractal parameters of various elements in the different locations show that the ore-forming processes and element migration pattern in the Shizishan orefield are consistent, and that the migrations of trace elements and major elements exhibit some differences.  相似文献   

"金土地工程"区农业地质调查土壤测量方法及精度探讨     

刘应平  阚泽忠  严向军 《物探化探计算技术》2008,30(1):71-73

对专项农用土地整理-"金土地工程"区大比例尺农业地质调查中的土壤地球化学测量方法及精度进行了试验.结果表明,单样分析能更真实地反映土壤地球化学的分布特征,经济实用的采样密度为16点/ km2～32点/ km2(100ha),地球化学图件编绘以距离倒数插值法成图效果更好.  相似文献   

RBF网络在地质样品非线性基体效应校正中的应用     

闫玉生  杨雪梅  穆克亮 《物探化探计算技术》2008,30(2):169-172

基于RBF(Radial Basis Function)网络的正交最小平方算法,对攀枝花地质样品进行动态非线性基体效应校正.首先采用EDXRF仪器对样品进行测量,并对样品的荧光计数进行归一化,设计出自动分类模型和动态非线性数据基体效应校正模型的二级串联结构,用自组织神经网络(SOFM)进行分类,然后用RBF网络预测了未知样品元素Ti的百分含量.结果表明:对所预测样本的Ti的百分含量与化学分析相比的误差均小于0.5%.由此可见,用RBF方法可以有效地对地质样品进行非线性基体效应校正,能够达到工矿生产的要求.  相似文献   

珲春中部土壤常量元素地球化学特征   总被引：4，自引：1，他引：3  

LI Yue-fen  王冬艳  LIU Shuang  曹鹏  SHANG Yuan 《世界地质》2008,27(2)

采用XRF-X荧光光谱法,研究了吉林省珲春中部常量元素在表层土壤中的含量以及在土壤剖面中的迁移分布等土壤地球化学特征.结果表明:表层土壤中MgO(0.85%)、CaO(0.95%)的含量平均值低于全国土壤平均值(分别为1.8%和3.2%),Fe2O3(3.41%)、K2O(2.61%)、Al2O3(13.33%)、SiO2(69.25%)含量平均值与全国平均值基本相当(分别为3.40%,2.50%,12.60%和65.00%),Na2O(1.83%)含量平均值高于全国平均值(1.60%).暗棕壤和白浆土两种类型土壤剖面常量元素组成差别不大,在垂向上呈现出不同的规律性.Sa、Saf和ba指标反映出暗棕壤土壤的风化淋溶度略强于白浆土,在剖面不同层次上,随土壤深度的增加,Sa和Saf呈现下降的趋势,而表层土壤的ba值比深层土壤高.  相似文献