Research on heavy metals in Ruditapes philippinarum and soda industry wastes     

朱校斌徐维海  王新亭黄新苹邓莉萍  康兴伦江志刚 马绪丽 《中国海洋湖沼学报》2005,23(1):39-42

Heavy metals pollution in Jiaozhou Bay was studied in Ruditapes. philippinarum, a bioindicator of seawater pollution. Heavy metals in soda industry wastes “white mud” were also studied. Comparison of microwave digestion method with general digestion method revealed that microwave digestion is superior to general digestion in precision, recovery, digestion speed and efficiency, etc. Cd concentration in Hongdao R.philippinarum samples exceeded the national standard by 0.046 mg/kg, that of Yinghai sample by 0.02 mg/kg,and that of Hongshiya sample by 0.22 mg/kg. Sample Pb concentration in Hongshiya was found to exceed the national standard by 0.02 mg/kg. However the heavy metals concentration in R. philippinarum near the Qingdao Alkaline Factory was complied with the standard. This was proved by Penaeus chinensis culture experiment.Therefore, the possible contamination source may come from other land areas.  相似文献   

谈大破大立     

王劼刚 《中国地质》1958,(11)

在1958年地质设計会議上,我們对1958年任务(钨加錫15000吨)是沒有信心的。根据“权威”的論断,粤北以黑鎢为主,所有著名矿区的儲量,加起来也不过二、三千吨;已知的錫矿,除已开采的矿区外,都是几十吨、几百吨的小矿。部分地质人員說:“我們那里大片花崗岩露出地表,侵蝕很深,錫矿远  相似文献   

四川盆地龙马溪组页岩微裂缝发育的“甜点”效应与机制          下载免费PDF全文

袁余洋 李 虎高建华  王浩宇马腾飞 李 刚 杨弼政 刘 宁 《地质科学》1958,55(4):1099-1131

系统认识和明确页岩“甜点”层段中有机质和脆性矿物促进微裂缝发育的效应和机制,对于提高水力压裂效率,促进页岩气增产稳产具有重要的工程实践意义。本文系统调研了国内外页岩中有机质和脆性矿物控制下的裂缝发育机理等的研究成果,结合数值模拟,对四川盆地龙马溪组页岩“甜点”层段中微裂缝发育的效应和机制进行了全面剖析和探究。研究结果表明：四川盆地龙马溪组页岩特殊的沉积背景为裂缝的发育提供了良好的物质基础。其中有机质的不同成熟度阶段、空间分布和形状、丰度和有机孔隙都在不同程度上控制着微裂缝的形成和发育。脆性矿物在岩石破坏过程中能量的高效转化和良好的脆性响应机制,促进了裂缝的复杂化。少量裂缝的发育还受控于有机质和脆性矿物接触的力学边界、有机酸的溶蚀以及脆性矿物的嵌入等相关效应与机制,进一步突显了裂缝成因的复杂化。由此,建议未来关于页岩储层的脆性评价工作向多元组分的精细化方向发展,同时注重微米—纳米尺度下有机质和脆性矿物力学性质的表征,对于促进并深化页岩破裂机理的认识具有一定的研究价值。  相似文献   

西藏南部花岗岩类稀土元素地球化学   总被引：1，自引：0，他引：1  

赵振华王一先  钱志鑫张玉泉 王中刚 《地球化学》1981,(1):26-35

REE abundances of granitoids in Southern Xizang were estimated to be within the range of 190 ppm (REE oxides), which are much lower than the average REE abundance of intermediate-acidic intrusive rocks in the crust. The REE abundances show a progressive decrease from late Yenshanian to late Himalayan (195--128 ppm). Four types of REE distribution patterns have been distinguished: (1) rightly deelined smooth curves, showing little Eu anomaly (δEu-values are 0.78-0.95) and relative enrichment of heavy REE (Diorite and granodiorite, fore example, are characterized by such a pattern) ; (2) rightly declined V-shape curves, displaying negative Eu anomaly(δEu: 0.50--0.70) (Biotite-granite shows sneh a pattern.) ; (3) righly declined V-shape curves with noticeable Eu anomaly (δEu : 0.36--0.39) (Two-mica granite and tourmalinemuscovite granite possess this pattern) ; and (4) rightly declined V-shape eurves with strong Eu anomaly (δEu : 0.27--0.86) (Porphyritie biotite-granite has such a pattern). In summary, the granitoids in this given area could be divided into two types, i. e.,the abyssal type (e. g. diorite, granodiorite) and the hypabyssal type (e.g. two-mica granite and tourmaline muscovite granite).  相似文献   

从中酸性的岩浆活动论西藏高原地壳运动特征   总被引：3，自引：0，他引：3  

张玉泉王中刚  赵振华许荣华林学农  谢应雯 《地球化学》1981,(2):136-141,i003

In view of their distinct NWW trending and their decreasing geological age from north to south, intermediate-acid magmatic rocks in the southern part of Xizang can be divided into three petrographical belts in general: (1) the Kangdese belt (120--10 m.y.). The major part of the belt is mainly composed of diorite, granodiorite, etc.,more intermediate in chemical composition and ranges from 120---70 m. y. in age; (2)the Lhangoi Kangri belt (30 m. y.) ; and (8) the Himalaya belt (20--10 m. y.). From their intruding features, spatial-temporal consistency, intruding scale, petrological characters and chemical Composition, it is suggested that these three petrographical belts secm to be closely related to plate underthrust and collision. It may be concluded that the major part of the Kangdese belt is resulted from the underthrust of the Indian Ocean Plate towards the Eurasian Continental Plate while the Lhagoi Kangri belt and the Himalaya belt are the results:of collision of the Indian sub-Continental Plate overlying the .Indian Plate with the Eurasian Continental Plate.  相似文献   

云南中甸纳帕海湖泊沉积物的磁化率及环境意义   总被引：29，自引：4，他引：29  

殷勇  方念乔  王倩  聂浩刚  秦尊丽 《地理科学》2002,22(4):413-419

研究区母岩特性，搬运距离和搬运营力决定了磁性矿物主要赋存在砂砾级颗粒中，纳帕海潮泊沉积物的磁化率与颗粒粒径，沉积相和有机质含量存在密切的相关关系，滨浅湖环境中砂砾级颗粒含量增加以及波浪淘洗对磁性矿物的富集作用，磁化率较高；浅湖环境中粉砂增多，砂减少，磁化率较之滨浅湖有所降低，在低能的半深湖／深湖环境中，由于缺乏磁性矿物的输入，磁化率再次降低，有机质含量很高的湖岸湖环境由于有机质的稀释作用磁化率值最低，磁化率等环境替代指标以及和北半球气候变化阶段，深海氧同位素阶段的对比，将纳帕海近6ka年来划分成6个主要的环境演化阶段，32kaB.P.(14.99m)和15kaB.P.(6.06m)分别是环境和气候变化的重要转折点，32－15ka B.P.期间出现的高湖面表明，虽然大气温度下降但有效湿度增加，全新世湖泊的急剧萎缩预示在大气温度增加的同时有效湿度降低，暖偏于构成了研究区全新世气候演化的特色。  相似文献   

塔里木盆地油田水的成因与演化   总被引：9，自引：0，他引：9  

蔡春芳  曾凡刚 《地质论评》1997,43(6):650-657

塔里木盆地油田水具有高矿化度，相对贫镁，富钙，富锶等特点，在含油层中铝浓度高，铝可能以有机络合物形成存在。氢氧同位素测量值表明；侏罗系，三叠系及寒武系－奥陶系内幕油田水为成岩改造原生水；白垩系，第三系为同生沉积水蒸发五余；侏罗系与石炭系，三叠系与石炭系的不整合面附近及奥陶系顶部，塔中地区石炭系是淡水与成岩改造或蒸发残余原生水混合成因。  相似文献   

橡胶隔震支座竖向刚度简化计算法   总被引：12，自引：5，他引：12  

刘文光  三山刚史 《地震工程与工程振动》2001,21(4):111-116

本文提出了采用橡胶隔震支座刚度因子计算隔震支座竖向刚度的方法，在此基础上提出了适于工程应用的简化计算式，研究还进行了2种不同橡胶6种规格共12件试验体的竖向刚度及水平刚度试验。文末给出了该计算结果与试验结果的对比，表明本文所提计算方法适合于工程使用。  相似文献   

山西省春播斯第一场好雨预报系统     

杨世刚  曹玉莲 《山西气象》1996,(2):13-16

  相似文献   

陕西南部花岗岩带的菱形格局     

陈陇刚 《陕西地质科技情报》1996,21(1):17-21

陕西南部花岗岩带的空间展布特征为“菱形网格”状，这种分布特征是深部构造和浅部构造相互叠加的具体表现。花岗岩类作为地球整个发展史中地壳演化的标准建造，其时空展布特征不仅与地壳（岩浆源区岩石）的性质，及基性，中性侵入岩的共生组合等地质环境有一定的关系，尤其与本区地块的发展演化有着密切的联系。  相似文献