豫西杜关锰银矿田火山隐爆角砾岩特征及其形成机制

豫西杜关锰银矿田火山隐爆角砾岩的形成主要与气液挥发分和超浅成的燕山期闪长岩及闪长玢岩有关,并受该地区近东西向深断裂的控制,而火山隐爆角砾筒又控制着杜关地区锰银矿床（点）的分布,豫西杜关锰银矿田由若干个矿床（点）构成,矿田内已发现多处隐爆角砾岩筒,这些火山机构均与成矿有密切的关系。本文介绍了两个主要火山隐爆角砾岩筒的地质特征,并论述了两类隐爆角砾岩的形成机制。原地棱角状火山角砾岩是由火山爆发震碎作用造成的,异地溶蚀状角砾岩是由流化作用造成的。     

Application of geostatistics and GIS technique to characterize spatial variabilities of bioavailable micronutrients in paddy soils

To understand the spatial dependency of bioavailable micronutrients in paddy soils, 134 soil samples were taken from Pinghu County, Zhejiang Province, south-east China to characterize the spatial variabilities of bioavailable Cu, Zn, Fe, and Mn. The geostatistics and geographic information system (GIS) techniques were applied. Bioavailable Zn and Mn were fitted to an exponential model with a range of 4.4 km and 2.97 km, respectively. Bioavailable Fe was fitted to the linear model with the longest range of 23.48 km. Bioavailable Cu did not show any spatial correlation with the fitted pure nugget effect model. Bioavailable Zn and Mn had strong spatial dependence due to the effects of intrinsic factors such as parent material, relief and soil types. Bioavailable Fe had moderate spatial dependence over a long distance. The spatial distribution of the four bioavailable micronutrients were significantly correlated to the soil formation factors. Human activity, such as application of fertilizer and pesticide, emission of waste gas and industrial pollution also had significant effects on the spatial distributions of the bioavailable micronutrients.     

黄土中蜗牛壳Mn^2＋的EPR研究及其古气候意义

对黄土高原陕西省洛川和甘肃省西峰剖面中黄土－古土壤层中的蜗牛壳进行了EPR波谱分析，同时对洛川地区的现代蜗牛壳也进行了测定。结果显示：（1）不同种类的蜗牛壳具有相近的EPR信号强度，表明不同种类的蜗牛对Mn^2+的吸收没有差异性。（2）黄土层中蜗牛壳的EPR信号强度远大于占土壤中的，即黄土中蜗牛壳所含的Mn^2+远大于古土壤中的蜗牛壳的Mn^2+的含量，说明前者生活在比较还原的条件下，后者形成环境的氧化性较高。因此本认为为蜗牛壳中Mn^2+的含量可反映其生长环境中Mn^2+的含量和氧化还原条件，对古气候的重建具有重要意义。     

四川黑水地区锰矿床特征与找矿远景

黑水地区锰矿床主要赋存于下三叠统菠茨沟组地层中,受构造控制。矿石矿物主要有硬锰矿、软锰矿、褐锰矿、菱锰矿、钙菱锰矿等。脉石矿物主要有磁铁矿、针铁矿、黄铁矿等。主成矿元素锰的资源量可达特大型以上,属于沉积变质型锰矿床。该区及外围均具有很大的找矿潜力。     

土壤铁锰结核中锰矿物类型鉴定的探讨

用化学选择溶提、X射线衍射 (XRD)等技术 ,对土壤铁锰结核中锰矿物类型的鉴定进行了探讨。结果表明 :根据 0 .1mol·L-1盐酸羟胺 (HAHC)处理前后土壤铁锰结核的XRD峰的变化 ,可鉴定出其所含的锂硬锰矿和钙锰矿 ;分析HAHC处理前后同一XRD谱线上不受锰矿物干扰的相邻层状硅酸盐矿物衍射峰与所含锰矿物衍射峰强度的比值变化 ,确定了水钠锰矿的存在 ;结合铁锰结核中与锰矿物类型相关的元素含量 ,可鉴定出其所含的钡硬锰矿和铅锰矿。     

大兴安岭中南段昌图锡力锰、银、铅、锌多金属矿床的发现及其意义

中国地质调查局天津地质调查中心与黑龙江省地质调查研究总院齐齐哈尔分院合作,在内蒙古霍林郭勒地区发现昌图锡力锰、银、铅、锌多金属矿床。矿床所在大地构造位置为中亚造山带东段,矿床产于中生代白音高老组中发育的北西向破碎蚀变带中。经地表槽探揭露可见7条矿脉沿北西向平行展布。矿体及围岩中仅发现低温蚀变,主要包括硅化、绢云母化、绿泥石化、褐铁矿化及碳酸盐化。根据蚀变矿物类型及矿体强烈受北西向构造控制等特征,初步判断矿床可能为浅成低温热液矿床。在大兴安岭中南段首次发现锰多金属热液矿床,暗示在太平洋构造域控制下,大兴安岭中南段北东向成矿带内部可能存在受北西向构造控制的次级成矿带。     

东疆中天山北缘大水锰矿带锰矿成因类型及找矿方向探讨

文章根据矿体产出地质部位、形态特征及与围岩的关系,把大水地区锰矿划分为4种成因类型:①近代风化堆积型锰矿,②受构造裂隙控制的风化淋滤型锰矿,③产于细碎屑岩中的沉积型锰矿,④产于地层与岩体接触带内的热接触-变质型锰矿。在对该区矿床成因及成矿条件进行对比分析的基础上,明确该区有望成为一处大型锰资源勘查-开发基地,深部找矿潜力巨大。提出今后找矿方向应以沉积型锰矿为主攻目标,以花坪锰矿为突破口,运用地质、物探相结合的方法在含锰岩系深部进行找矿,通过点上突破来带动整个锰矿带的找矿工作。     

The astrometric observations of planetary satellites, close approaches and occultations of stars by asteroids and mutual events in the systems of planetary satellites with the 26-in. refractor of Pulkovo observatory in 1995-2006

Astrometric and photometric observations of major planets, their satellites and asteroids have been made with the 26-in. refractor of the Pulkovo observatory during the period from 1995 to 2006. The CCD (ST6) and photographic observations were carried out. Accurate relative position of satellites of Jupiter and Saturn have been derived. The positions of Saturn have been calculated using the theoretically predicted coordinates of satellites relative to the planet without measurements of the photographic images of the planet. Also the observations of Hale-Bopp comet and Mercury transit have been made. The 26-in. refractor has been included into the international campaign PHEMU-2003: photometric CCD observations of mutual occultations and eclipses of Galilean satellites. The light curves of the events have been obtained and parameters of the events have been determined.     

官地银金矿床氧化带划分的试验研究及物相锰在贫硫化物型银矿床中的应用

官地银金矿床的原生矿石和氧化矿石在矿石颜色、矿物粒度、矿物组合和银金赋存状态均有明显差异。因此,氧化矿石在采矿和选矿上只能采取单采单选的方法。通过官地银金矿床银的物相、铅锌物相和铁锰物相的试验研究,来划分氧化带的范围和确定其埋深。官地银金矿床是应用物相锰来划分氧化带,即锰氧化率＝Ｍｎ４＋／ＴＭｎ×１００％,当锰氧化率≥２５％时划为氧化矿,＜２５％时划为原生矿,这一试验研究成果为官地银金矿床选择采选方案提供科学试验依据。     

The Effects of Zn, Mn, and Co Accumulation on Growth and Chemical Composition of Fucus vesiculosus L under Different Temperature and Salinity Conditions

Abstract. Combined effects of temperature, salinity, and metal enrichment (Zn, Mn, Co) on the growth rate and chemical composition of Fucus vesiculosus L. were studied in culture. Factorial combinations of two temperatures and three salinities were used. The results indicated that the accumulation of Zn and Mn into algal tissue was enhanced by dilution of the media, whereas Co accumulation exhibited maxima at the medium salinity. Zn accumulation was enhanced by temperature, while the opposite was true for Mn and Co.
In the presence of metals the usual dilution-induced changes in growth activity and chemical composition of Fucus plants were altered, while responses to the temperature factor remained unchanged. In diluted media, growth activity and mannitol content decreased along with a simultaneous increase of protein content. In the presence of Zn and Mn the mannitol content exhibited peaks at the medium salinity; in the presence of Co the dilution-induced pattern remained unchanged. Salinity-induced changes in growth and protein content were altered in the presence of metals. Maxima in growth rates were found at the medium salinity. Growth was higher in extremely diluted media than in scawater, indicating an inversion of responses to the salinity factor. Both the growth rate and mannitol content were lowest under the influence of Zn.