泥旦沟金矿堆浸试验研究

泥旦沟金矿采用堆浸工艺，对低品位矿石进行提金试验。试验矿石品位２．２５ｇ／ｔ，规模４７９５ｔ。金的浸出率６７．７４％，单位矿石利润６６．８元／ｔ，经济临界品位降至１．２３ｇ／ｔ，矿山服务年限得到有效延长。     

花崖沟特低品位金矿堆浸技术的研究

通过近一年的开发试验研究,确定了花崖沟金矿氧化矿石最经济的提金工艺流程,取得了一些主要技术经济指标,其中入堆品位平均为０．８０６ｇ／ｔ,尾渣品位０．２ｇ／ｔ,开采成本８元／ｔ,氰化钠单耗１４５ｇ／ｔ,临界品位０．５５ｇ／ｔ,总回收率６８％。这些指标与国内外同类矿床开发相比较,已达到国内先进或领先水平,有些指标可以与国际先进水平相比。     

花崖沟特低品位金矿堆浸技术的研究

通过近一年的开发试验研究，确定了花崖沟金矿氧化矿石最经济的提金工艺流程，取得了一些主要技术经济指标，其中入堆品位平均为０．８０６ｇ／ｔ，尾渣品位０．２ｇ／ｔ，开采成本８元／ｔ，氰化钠单耗１４５ｇ／ｔ，临界品位０．５５ｇ／ｔ，总回收率６８％。这些指标与国内外同类矿床开发相比较，已达到国内先进或领先水平，有些指标可以与国际先进水平相比。     

碱性体系在线氢化物发生原子荧光光谱法测定铜矿石中痕量砷锑铋

建立了一个碱性体系在线氢化物发生原子荧光光谱法测定铜矿石中痕量砷、锑、铋的分析方法。设计了在线氢化物发生流路及操作程序。选择了碱性体系氢化物发生的各项最佳条件,避免了Ｃｕ、Ｆｅ等大量基体元素的干扰。方法检出限为Ａｓ０．６μｇ／Ｌ,Ｓｂ０．４μｇ／Ｌ,Ｂｉ０．９μｇ／Ｌ,Ａｓ、Ｓｂ、Ｂｉ的工作曲线均在０～４００μｇ／Ｌ内呈良好的线性,经铜矿石国家一级标准物质分析验证,砷锑铋的测定结果与标准值吻合,相对标准偏差（ＲＳＤ,ｎ＝５）在４．２％～８．８％。     

广西横县某铜矿选矿实验研究

文章通过对横县某硫化铜矿的物质组成研究,以及不同试验方案的对比选矿试验、不同药剂用量的条件试验,从而确定出最佳的工艺流程参数。在此基础上进行的闭路试验产品的铜精矿品位为24．23％,回收率达到了95．55％,取得了很好的选矿技术指标。     

载炭泡塑分离富集—火焰原子吸收法测定金

用载炭泡塑从５％－３０％的王水介质中吸附富集５－１０００μｇＡｕ，经无臭灰化和王水浸提，Ａｕ的回收率大于９９％。方法用于含Ａｕ量较高的矿石分析时，效果较泡塑吸附好。用火焰原子吸收法测定含Ａｕ６．８０ｇ／ｔ的金标样，验证分离富集方法的可靠性，结果平均值为６．７２ｇ／ｔ，相对标准偏差（ｎ＝１１）为３．１％。     

载炭泡塑分离富集－火焰原子吸收法测定金

用载炭泡塑从５％～３０％的王水介质中吸附富集５～１０００μｇＡｕ，经无臭灰化和王水浸提，Ａｕ的回收率大于９９％。方法用于含Ａｕ量较高的矿石分析时，效果较泡塑吸附好。用火焰原子吸收法测定含Ａｕ６．８０ｇ／ｔ的金标样，验证分离富集方法的可靠性，结果平均值为６．７２ｇ／ｔ，相对标准偏差（ｎ＝１１）为３．１％。     

东疆地区某氧化铜矿选矿试验研究

对新疆东疆地区某氧化铜矿石进行选别试验,确定该氧化铜矿选别流程为一粗二扫一精：选别的最佳条件为：磨矿细度90％;粗选硫化钠用量2500g／t;BX与丁胺黑药组合使用做捕收剂,用量分别为3500g／t和850g／t;2#油用量106g／t.铜精矿品位25．76％,回收率73.51％.     

原子荧光光谱法直接测定铜矿中的硒

采用硫脲抑制铜的干扰，不经分离富集原子荧光光谱法直接测定铜矿中的Se。方法的检出限为0．02μg/g。Se浓度在0～80μg／L与荧光强度呈线性关系。用铜矿石国家一级标准物质GBW 07233(ωSe为5．1μg／g)和GBW 07234(ωSe为0.89μg／g)进行精密度试验，RSD(n=12)为3.44％、8.06％。加标准回收试验结果，Se的回收率为93．2％～104、6％。经铜矿石国家标准物质验证，测定结果与标准值相符，方法适用于铜矿中0～8．0μg／g Se的测定。     

用加压氧化—氰化法从硫精矿中提金试验研究

采用“高效浸金反应器”研究了加压氧化－氰化法提金新工艺。对山东某地硫精矿采用此工艺,选择条件为氰化钠用量１．５ｋｇ／ｔ、石灰用量７ｋｇ／ｔ、矿浆固液比１：１５、浸出时间３０ｍｉｎ,金浸出率可达６２％,与常规氰化法相比成本低,效率高。     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H₂O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H₂O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ₁ roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).     

HYDROGEOLOGY

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level     

METAMORPHIC PETROLOGY

正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),     

SERIALS

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GEOPHYSICAL EXPLORATION

正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-     

PETROLEUM GEOLOGY

正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)     

GEOCHEMISTRY

正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861