Kuranakhite discovered in China for the first time   总被引：4，自引：0，他引：4  

Zhou Xinchun  Liu Liang  Wang Shizhong  Wang Yan  Yang Jiankun  Guo Nenglin  Li Guanghui  Hu Jianmin 《中国地球化学学报》1998,17(1):77-80

Kuranakhite was firstly discovered in the oxidized zone of the Kuranakh gold mine, southern Russia, and since then there has been no report on it. Kuranakhite in this paper was discovered in the Jialu gold mine, Luonan County, Shaanxi Province. The mineral often occurs as irregular granular aggregates varying from 0. 05 to 0. 25 mm in size. The mineral is light brown to brown in color, translucent, brown in steak, and vitreous in luster. Hv is 231 – 439kg/mm², H_M = 4∼5 and measured density is 6.72(2)g/cm³. Its reflection color is bluishgray to light-blue and it shows middle anisotropism and weak bireflectance. Its polarization color is blue to grayish-brown and there is no internal reflection. The index of refraction is:N _a = 2.01,N _β = 1. 98,N _γ = 1. 96. The average composition is PbO 45. 40 wt %, MnO₂ 16.41wt%, TeO₃ 38.10wt%, totalling 99. 91wt%. The empirical formula is Pb_0.99Mn_0.92 Te_1.06O₆, which can be simplified as PbMnTeO₆. Principal lines in the X-ray power pattern [d(I)(hkl)] are:0.341 (100), (111); 0.2556(60), (130); 0.2043 (50), (041);0.1666 (20), (310); 0.1598(40), (241); and 0.1472(15), (330). It was determined that kuranakhite is orthorhombic; its space group may be C;a = 0.511(1) nm,b = 0.891(2)nm,c = 0.532(l)nm, a:b = 0.57, c:b = 0.60;V = 0.242 (3) nm³;Z = 2, and calculated density = 6.66(1) g/ cm³. This project was financially supported by both the Armed Police Headquarters of Gold Exploration and the Science Foundation of Shaanxi Provincial Educational Commission (No.HJ96-2-4;96JK-026).  相似文献   

潘—矿13-1煤层防水煤柱留设影响因素分析及重新留设意义     

许光泉  魏加华  李禄荣  孙兴平  刘永庆 《安徽地质》1998,(2)

通过对矿井构造地质条件、水文地质条件、覆岩结构类型、基岩风化带特征的分析,对１３－１煤层原８０ｍ防水煤柱进行了重新留设,并给出了不同情况下防水煤柱的计算公式,且满足生产实际需要,这对进一步回收煤炭资源、提高经济效益有重要意义。  相似文献   

石门雄黄矿区一号窿矿体深部定量预测     

姚超美 《化工矿产地质》1997,19(4):233-238

在对石门雄黄矿区唯一的生产井一号窿矿体成矿条件、控矿因素研究的基础上，用逻辑信息法及回归分析法对其深部的找矿远景进行预测，两种方法结合，指明了－３７０～－４２０ｍ段的成矿远景，为今后的采矿工作部暑提供了依据。  相似文献   

碲锰铝矿在中国的首次发现   总被引：1，自引：0，他引：1  

周新春  刘良  王世忠  胡建民  炎金才  杨建琨 《矿物学报》1997,(2)

碲锰铁矿（Kuranakhite）最早是1975年发现于俄罗斯南雅库特金矿床氧化带之中，之后国内外均未见报导。本文所述碲锰铅矿发现于陕西省洛南县驾鹿金矿床中，常呈不规则粒状集合体，粒径一般为0．05～0．25nm，浅褐色至棕褐色，半透明，条痕棕色，玻璃光泽，维氏硬度HV=231～438kg／mm2，摩氏硬度HM=4～5。实测密度6．72（2）g／m3。反射色呈蓝灰至浅蓝色，非均性中等，双反射弱，偏光色蓝至灰棕色，无内反射。折射率N=2.01，NB=1．98，Nr=1．96。6个电子深外平均成分PbO为45.40％，MnO2为1641％，TeO3为38．10％，总和99．91％；计算的化学式为Pb0.99M0.92Te1.06O6，简写为PbMnTeO6。X射线粉晶分析主要强线d（I），（hkl）为：0．341（100），（111）；0.2556（60），（130）；0．2043（50），（041）；0．1666（20），（310）；0.1598（40），（241）；0.1472（15），（330）。根据粉晶指标化求得该矿物为斜方晶系，可能的空间群为C，a=0．511（1）um，b=0．891（2）nm，c=0．532（1）nm，a：b=0．57，c：b=0.60；V=0.242（3）nm3，Z=2，Dx=6.66（l）g／cm3。  相似文献   

煤矸石-水相互作用的溶解动力学及其环境地球化学效应研究   总被引：17，自引：1，他引：17  

党志 《矿物岩石地球化学通报》1997,(4)

煤矸石—水相互作用的溶解动力学及其环境地球化学效应研究党志（中国科学院地球化学研究所，贵阳５５０００２）关键词水—岩作用煤矸石地球化学动力学采煤矿区复垦环境效应收稿日期：１９９７－３－１０作者简介：党志男１９６２年生博士生环境地球化学煤矸石以其量多、...  相似文献   

太原市东山矿区岩溶地下水排供结合研究   总被引：1，自引：0，他引：1  

李振栓  段展青 《中国煤田地质》1997,9(3):40-43

太原市为华北地区严重缺水城市之一，而与此紧紧相连的太原市东山煤矿，丰富的岩溶地下水造成750下山煤层无法开采。为了解决东山煤矿12873万t煤炭资源带压开采问题及缓解太原市供水紧张的局面。笔者从分析东山岩溶水系统水文地质条件入手，对井田内水文地质条件进行了定量研究，认为将东山煤矿的疏干降压与太原市的供水结合起来其利大于弊。  相似文献   

1996年2月3日云南丽江7.0级地震   总被引：7，自引：5，他引：7  

皇甫岗 《地震研究》1997,20(1):1-8

１９９６年２月３日１９时１４分１８．１秒，云南省丽江与中甸交界的丽江县境内（北纬２７°１８＇，东经１００°１３＇）发生７．０级强烈地震。大震发生后，云南省地震局立即按《云南省破坏性地震应急预案》启动一类大震对策，成立地震前后方两个指挥部，全面开展震情现场监视、地震灾害损失评估、科学考察和宣传工作。准确地预报了２月５日６．０级、２月６日５．７级、２月７日５．４级强余震，及时科学地完成了灾情调查和震害  相似文献   

矿井水的资源化与环境保护——以焦作矿区典型地段为例   总被引：1，自引：0，他引：1  

武强  罗元华  孙卫东  金玉洁  叶贵钧  夏镛华  林曾平 《地质论评》1997,43(2):217-224

针对我国煤矿区目前普遍存在的排、供矛盾和环境地质问题,本文首次提出了矿区排水、供水、环境保护三位一体优化结合的经济-水力管理模型。该模型通过布设地面矿坑抽水孔和奥灰(奥陶系灰岩)浅排孔等地上应急取水建筑物,增强了结合系统整体抗御突发性水害的能力,较好地解决了供水水源安全、稳定问题。同时,三位一体结合模型较为圆满地处理了长期以来从地质勘探到评价管理各个不同阶段,排、供和环保3个不同部门各立门户的封闭局面,避免了大量的重复投资,提高了评价、管理、决策的整体水平。本文以焦作矿区典型地段为研究实例。  相似文献   

山地露天矿自然通风风流与湍流结构的数值模拟   总被引：4，自引：2，他引：4  

王卫国  胡泳涛 《高原气象》1996,15(4):464-471

利用建立的三维非力能量闭合的大气边界层数值模式，研究了中性层结条件下某露天矿自然通风的风流和湍流结构特征及影响因子。研究表明：坑内水平风场在坑底或采壁处受地形的影响很大，在矿采深与开口宽度比较小或者来流风速随高度的切变不大时，坑内气流为平直型，有利于通风；反之坑内则形成环流，且在环流范围内较大的湍能，不利于通风，易产生高浓度的污染物。本模式模拟的结果还与风洞模拟和高阶闭合模式模拟的结果作了检验比较  相似文献   

Precipitation of Fe and Al compounds from the acid mine waters in the dogyae area, Korea: A qualitative measure of equilibrium modeling applicability and neutralization capacity?     

Jae-Young Yu 《Aquatic Geochemistry》1996,2(1):81-105

To investigate the applicability of equilibrium modeling for the estimation of the chemical changes of acid mine waters, the phases predicted to precipitate by equilibrium calculation were compared with what actually precipitates from the stream and acid mine waters in the Dogyae area, Korea. The computer program MINTEQA2 was used for the equilibrium calculations based on the chemical compositional data of the water samples collected in the study area. XRD, IR, thermal and chemical analyses of the collected precipitates were performed to identify their phases.The results of the identification of the collected precipitates are inconsistent with what the equilibrium calculations predict. The equilibrium calculations indicate that ferrihydrite, FeOHSO₄, gibbsite, and AlOHSO₄ should precipitate from the stream and acid mine waters in the study area. However, the experimental analyses show that only ferrihydrite and Al₄(OH)₁₀SO₄ are the recognizable precipitates on the bottom of the stream and mine drainage channels. Comparing the stability relations among the possible precipitates with the field occurrence of the precipitates in the study area suggests that FeOHSO₄ and AIOHSO₄ are kinetically inhibited to precipitate and metastable ferrihydrite and Al₄(OH)₁₀SO₄ appear in their stability field instead. It indicates that the chemical compositional change of the waters due to the solid phase precipitation in the study area must be interpreted and predicted in terms of the precipitation of not the phases predicted by the equilibrium calculation but the actually identified ones.Assuming that the dissolved species in the aqueous phase are in equilibrium with respect to the currently precipitating solid phases in the study area, the water chemistries are attempted to interpret based on the plot of the theoretically calculated activities of the dissolved species on the stability diagram for the identified precipitates and gibbsite. The plot reveals a few evolution paths of the chemical composition of the acid mine water as the acid generation and neutralization progress. The evolution path producing ferrihydrite and then Al₄(OH)₁₀SO₄ precipitation suggests that the system including acid producing pyrite has lost significant amounts of its neutralizing capacity and thus, become intolerable to the impacts from acid mine water.  相似文献