化学发光体系测定铋的研究及其应用

研究了痕量Bi催化鲁米诺-邻菲啰啉-H_2O_2-Triton x-305体系产生化学发光及非离子表面活性剂敏化化学发光最佳反应条件,拟定了新的化学发光测定Bi的方法。方法最低检出限达3.7×10~(-10)g/ml,测定响应浓度范围为5×10~(-9)～10~(-5)g/ml,回收率为98.7％～103％,相对标准偏差为2.8％～3.5％之间。     

内蒙古苏尼特左旗巴彦洪格尔地区土壤测量地球化学异常特征及找矿方向

文章在1∶5万土壤地球化学测量成果基础上,对内蒙古苏尼特左旗巴彦洪格尔地区的地球化学参数进行计算和分析,对区内元素分布特征、元素相关性及组合特点、主要综合异常特征进行了研究,结果表明:区内Ag、Pb、Sn、W含量较高,分异性又强,所形成异常规模较大,强度较高,具有较大找矿价值。结合对主要综合异常的分析,划分出古尔班呼都格金、银找矿远景区,苏吉敖包钨、铅、锌找矿远景区,哈尔德勒铅、锌找矿远景区,查干诺尔钼找矿远景区。     

高放废物地质处置阿拉善预选区巴彦诺日公地段目标深度岩体质量预测

高放废物地质处置阿拉善预选区巴彦诺日公地段位于阿拉善地块东部,主要由二叠纪侵入的花岗岩构成,地壳次稳定。通过踏勘,确定了2个钻孔,布置了若干条物探剖面。以这2个钻孔为中心,在17km×17km范围内进行了工程地质测绘,获得了地表结构面分布特征。地表岩体质量以III级岩体为主,地表以下3m~4m处多为I级和II级岩体。根据钻孔岩芯编录和力学试验数据,对岩芯质量进行评价,岩芯整体质量较好,以Ⅰ级和Ⅱ级岩体为主。对比岩体质量和测井数据,发现岩体质量与岩体的物理参数具有明显的相关性。通过和CSAMT剖面上对应位置的对比,建立了岩体质量与电阻率的关系。结合地表岩体质量、钻孔岩芯质量和物探剖面,对目标深度岩体进行了预测：目标深度（600m深左右）岩体质量以Ⅰ级岩体为主,局部有Ⅱ级岩体和Ⅲ岩体。     

音频大地电磁法与核磁共振法结合划分含水层的试验

为提高应用地球物理方法划分含水层的准确性,提出将音频大地电磁法与核磁共振法结合运用的综合方法。运用该方法在内蒙古巴彦宝力格盆地某区开展野外试验,并将试验结果与该区域供水水文地质详查报告中的水文地质剖面图进行了比对。结果表明：①试验区100 m深度范围内,该方法所揭示的含水层深度、厚度分布与水文地质剖面图基本一致;②据该方法,介质岩性为泥岩、粉质黏土、粉土、气孔状玄武岩和砂砾时,其衰减时间分别为≤30、30～60、60～120、120～260和260～600 ms,据此得到的介质岩性分布与水文地质剖面图高度吻合;③该方法得到的含水层含水量变化与水文地质剖面图的涌水量变化规律一致。因此,运用该方法划分含水层具有很强的可行性,在生产实践中具有推广价值。     

内蒙古巴彦哈尔金矿床地质特征及成因初探

内蒙古巴彦哈尔金矿床位于华北陆块北缘艾力庙-锡林浩特中间地块西北缘.矿床赋存于中元古代温都尔庙群的绢云石英片岩和绿泥石片岩中.矿床的形成与区内韧性剪切带及华力西期岩浆活动关系密切.矿区内共圈定出5个矿体,总体走向为北西向,矿体呈似层状或透镜状产出,矿石类型包括石英脉型和糜棱蚀变岩型.金矿化与硅化和黄铁绢英岩化蚀变关系密切.结合矿床的矿体地质、矿物成分、矿物嵌布及围岩蚀变特征以及前人包裹体测温结果,认为矿床类型为浅成低温热液型金矿.     

内蒙古东乌旗巴彦都兰铜矿床地质和地球化学特征及其意义

内蒙古巴彦都兰铜矿床位于二连—东乌旗成矿带,该矿区出露下泥盆统泥鳅河组粉砂岩和海西中期黑云母花岗岩体,铜矿体呈脉状产出于泥鳅河组粉砂岩中,严格受断裂控制。主要金属矿物为黄铁矿、磁黄铁矿、黄铜矿等,脉石矿物主要为石英和碳酸盐岩等。矿区黑云母花岗岩La-ICP-MS锆石~(206)Pb/~(238) U加权平均年龄为303.5 Ma±1.1 Ma,铜矿床属于晚古生代构造-岩浆作用的产物。岩石地球化学特征反映黑云母花岗岩属准铝质-弱过铝质高钾钙碱性系列,A/CNK值介于0.99~1.04之间,高碱(w(K_2O+Na_2O)=7.36%~8.73%),富钾(w(K_2O)/w(Na_2O)=1.08~1.66),其形成具有岛弧或后碰撞环境I型花岗岩特征;微量元素特征显示岩体可能形成于后碰撞伸展阶段早期的构造环境中。黄铜矿硫同位素组成介于0.1×10~(-3)~2.1×10~(-3)之间,反映成矿所需的硫可能来自于岩浆,巴彦都兰铜矿区花岗岩很可能是成矿硫的提供者。     

内蒙古乌兰诺尔井田6号煤层煤质特征研究

乌兰诺尔井田位于内蒙古自治区东北部,含煤地层主要为白垩系下统巴彦花组,6号煤是区内唯一可采煤层,其显微组分镜质组含量为85.2%～91.0%,惰质组含量为2.0%～13.4%,壳质组在2%以下。测试分析表明6号煤属中灰、低—中高硫、高热值褐煤,其挥发分高,化学反应性好,燃烧时速度快,反应充分,是很好的动力燃料,适用于火力发电。     

Geological Relationships Between the Intrusions,Country Rocks,and Ni-Cu-PGE Sulfides of the Kharaelakh Intrusion,Noril′sk Region:Implications for the Roles of Sulfide Differentiation and Metasomatism in Their Genesis

The Ni-Cu-platinum group element sulfide ore deposits of the Kharaelakh Intrusion,Noril′sk Region,Siberia,represent a large concentration of sulfides associated with a small differentiated intrusion formed at the edge of the Siberian Craton in the roots of the Siberian Trap flood basalt.The deposit is associated with an intrusion that occupies a flanking periclinal structure adjacent to the Noril′sk-Kharaelakh Fault.The intrusion is strongly differentiated and comprises taxitic gabbrodolerites,picritic gabbrodolerites,and gabbrodolerites within the main body which in turn forms a chonolith within a sheet-like intrusion that extends laterally to form extensive undifferentiated sills of gabbrodolerite.The intrusion substantially replaces the stratigraphy of the country rocks,and although it appears to have exploited the axis of structures developed in response to transtension,the intrusion has created space by both mechanical dilation of stratigraphy and magmatic replacement of pre-existing sedimentary rocks.The frontal lobes of the main intrusion have complex apophyses of gabrodolerite on a range of scales that demonstrate replacement of the sedimentary rocks and link to the development of an extensive metamorphic halo in the country rocks.This halo is much narrower over the main body of the intrusion,and these observations have implications for the thermal history of the intrusion.Mg-skarns and breccias are developed in the roof of the main body of the intrusion.Within the intrusion,the taxitic rocks contain vesicles and the blebby sulfides developed in the picritic and taxitic gabbrodolerites appear to have a linkage to volatile phases.Cuprous sulfide mineralization developed at the roof of the Kharaelakh Intrusion is associated with metamorphosed and skarn-bearing country rocks,and appears to have been generated by a combination of sulfide fractionation and associated metasomatism.The geological relationships appear consistent with a chonolith model for the development of the differentiated intrusion and mineralization,but the extent of metasmorphism of the country rocks appears to be related to the unusual thickness of gabbrodolerite apophyses at the flanks of the intrusion rather than metamorphism produced by the passage of mafic magma through the intrusion.Variations in disseminated sulfide compositions and metasomatic textures in the skarns are described,and a model is proposed which balances traditional views on the evolution of the magma conduits with the impact of magmatic fluids transported through the magma column(i.e.transmagmatic fluids).The importance of structures in controlling the nature of the conduit,and the resultant small intrusions with excess sulfide is a feature of many other Ni-Cu sulfide deposits including Voisey′s Bay,and it is suggested that the sulfides are more likely to have beentransported from depth into their final resting place rather than developed by in-situ equilibration of sulfide with fresh magma in the chonolith.     

1988年反厄尼诺（La Nia）事件的数值模拟

用中国科学院大气物理研究所高分辨率、自由表面热带海洋环流模式对厄尼诺／南方涛动（Ｅｌ／ＳｏｕｔｈｅｒｎＯｓｃｉｌｌａｔｉｏｎ）循环中另一重要位相Ｌａ　事件进行了数值模拟研究。模式区域为南北纬３０°之间的热带太平洋，经纬圈水平方向分辨率分别为２°和１°，垂直方向分为不等距的１４层；模式中考虑了盐度并引入与洋流切变和层结稳定度有关的垂直扩散参数化方案。在观测到的海表风应力、热量和淡水通量（蒸发与降水之差）驱动下，所发展的模式从１９８４年积分到１９８９年。本文给出模式对近十几年来最强的１９８８年Ｌａ事件进行数值模拟的结果，着重分析Ｌａ期间热带太平洋海面起伏、流场和温度场时空演变，以及Ｌａ和Ｅｌ期间变量场时空结构差别。文中还进行了模式结果和一些观测资料间的比较。