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安徽铜陵胡村南铜钼矿床两种不同性质的成矿流体

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西部资源 2017年第5期 73-78页

作者：陈林杰王素平王训诚安徽省地质矿产勘查局321地质队铜陵244033

铜陵胡村南铜钼矿床由两种不同性质的流体作用成矿。一种流体早期晶出棕红色石榴子石,为强氧化环境;中期形成磁铁矿,为弱氧化环境;晚期结晶黄铜矿+黄铁矿,为弱碱还原环境;流体SiO_270%,为酸性钾硅质流体。

关键词：超基性钙铁质流体酸性钾硅质流体胡村南铜钼矿床安徽铜陵

安徽铜陵马山金硫矿床稀土元素和稳定同位素地球化学研究

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地质学报 2007年第7期81卷 929-938页

作者：田世洪侯增谦杨竹森丁悌平蒙义峰曾普胜王彦斌王训诚中国地质科学院矿产资源研究所北京100037 国土资源部同位素地质重点实验室北京100037 云南财贸学院资源环境系昆明650221 中国地质科学院地质研究所北京100037 安徽省地质矿产局321地质队铜陵244033

安徽铜陵铜官山铜矿田是中国长江中、下游铁、铜、硫、金成矿带中著名的矽卡岩型矿床。马山金硫矿床位于安徽铜陵铜官山矿田,侵入岩体为天鹅抱蛋山石英闪长岩。文章通过对马山金硫矿床的氢、氧、碳、硫、硅同位素组成和稀土元素地球化... 详细信息

安徽铜陵铜官山铜矿田是中国长江中、下游铁、铜、硫、金成矿带中著名的矽卡岩型矿床。马山金硫矿床位于安徽铜陵铜官山矿田,侵入岩体为天鹅抱蛋山石英闪长岩。文章通过对马山金硫矿床的氢、氧、碳、硫、硅同位素组成和稀土元素地球化学特征研究,探讨成矿溶液中水、碳、硅和硫的来源以及成矿溶液的演化问题。研究表明,稀土元素球粒陨石标准化组成模式为右倾型,矿石的稀土配分曲线类似于天鹅抱蛋山石英闪长岩,认为形成该矿床的热液流体主要来源于闪长质熔体。马山金硫矿床矿石中石英的δ18OH2OV-SMOW变化范围为6.9‰~10.7‰,平均为8.7‰,与岩体的δ18OV-SMOW值(9.3‰~11.1‰,平均为10.0‰)比较接近,而矿石中石英的δDV-SMOW变化范围为-69‰^-62‰,表明矿石成矿流体主要来自岩浆。矿石中方解石的碳、氧同位素组成与矿区围岩的碳、氧同位素组成明显不同,其δ13CV-PDB、δ18OV-SMOW值分别为-5.2‰^-3.6‰和12.2‰~12.9‰,与岩浆作用形成的CO2的碳、氧同位素组成一致,表明矿石中方解石的碳、氧来源于岩浆作用。硅和硫具深部岩浆或岩浆热液水来源的特点。

关键词：地球化学稀土元素稳定同位素马山金硫矿床安徽铜陵

Environmental significance exploration to Tamarix ConeAge Layer in Lop Nur Lake region

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Chinese Science Bulletin 2005年第20期50卷 2395-2397页

作者： XlA xuncheng ZHAO Yuanjie wang Fubao CAO Qiongying Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China College of Resources and Environmental Sciences Hebei Normal University Shijiazhuang 050016 China Department of Urban and Resources Sciences Nanjing University Nanjing 210093 China

For a long time, it has been short of finding the appropriate datingmaterials to meet special demands in order to study environmental change in the modern desert areaswith strong windy and sandy actions. Tamarix Cone Age Layer provides a new way to overcome thisdifficulty to some extent. Contained in Tamarix Cone Age Layer, the features such as delta~(13)C andC/N of fallen Tamarix leaves, and thickness and granule composition of sand layer materials havecontained the information of climatic and environmental changes. This paper has probed into thefeasibility making use of Tamarix Cone Age Layer to reveal the environmental change in Lop Nur Lakeregion. There are many Tamarix Cones with clear Tamarix Cone Age Layers distributed in thesouthwestern part of Lop Nur Lake region, one of them with about 10 m in height is located at eastbank of lower reaches of Milan River. The Tamarix Cone Age Layers in the upper part of the cone areserial based on the judgment of the whole configuration of sediment hierarchy. Totally 33 samplesare sampled according to the order from top age layer down. Every sample contains 4 age layers. Thethickness is surveyed on the spot. The measured results of delta~(13C and C/N of fallen Tamarixleaves, and thickness of sand layer materials are shown in Fig. 1.

关键词：沙漠地区风沙颗粒气候学环境变化

The genome-wide analysis of intermediate-size ncRNAs in higher plants

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The genome-wide analysis of intermediate-size ncRNAs in high...

Climate and environment reconstruction during the Medieval Warm Period in Lop Nur of Xinjiang, China

第十三届全国植物基因组学大会

作者： Danmeng Zhu~1,Tingting Liu~1,xuncheng wang~1,Wei Deng~2,Yuqiu wang~1,Guangming He~1, Runsheng Chen~2,Xingwang Deng~(1,3*) 1 Peking-Yale Joint Research Center for Plant Molecular Genetics and Agrobiotechnology, College of Life Sciences,Peking University,Beijing 100871,China. 2 Bioinformatics Laboratory,Institute of Biophysics,Chinese Academy of Sciences,Beijing 100101,China 3 Department of Molecular,Cellular,and Developmental Biology,Yale University,New Haven, CT 06520-8104,USA.

Recent large-scale analytical efforts have revealed various aspects of the functional sequence elements in several model organisms,and thereby contributed to the understanding of the non-protein coding parts of ***,the cellular RNA species with size range of 70～300nt have seldom been systematically annotated or extensively ***,we document a comparative genome-wide

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Chinese Science Bulletin 2008年第19期53卷 3016-3027页

作者： MA ChunMei wang FuBao CAO QiongYing XIA xuncheng LI ShengFeng Li XuSheng School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210093 China Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

We made multi-proxy analysis of 14C, grain size, microfossils, plant seeds, and geochemical elements on samples from a profile in the central West Lake of Lop Nur. The grain size suggests relatively stable sedimentary environment around the Medieval Warm Period (MWP) with weak storm effect, which is followed by frequent strong storm events. Abundant microfossils and plant seeds in this stage indicate a warm and humid fresh to brackish lake environment. C, N, and stable elements are high in content in the sediments while Rb/Sr, Ba/Sr, and Ti/Sr are in a steady low level. In addition, plenty of red willows lived here prior to about 700 a B.P., indicating a favorable environmental condition. The results indicate that the environment in Lop Nur and its west bank turned to be favorable at about 2200 a B.P., where the Loulan Culture began to thrive. Then the climate and environment came to be in the good condition in the Tang and Song Dynasties, when the storm effect became weaker, rainfall increased and the salty lake water turned to be brackish to fresh lake water. Hence, limnic biomass increased with higher species diversity.

关键词：中世纪新疆气候变化环境进化

安徽铜陵冬瓜山大型铜矿：海底喷流-沉积与矽卡岩化叠加复合成矿过程

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地质学报 2011年第5期85卷 659-686页

作者：侯增谦杨竹森吕庆田曾普胜谢玉玲蒙义峰田世洪徐文艺李红阳姜章平王训成姚孝德中国地质科学院地质研究所北京100037 中国地质科学院矿床资源研究所国土资源部成矿作用和资源评价重点实验室北京100037 北京科技大学北京100082 石家庄经济学院石家庄050031 安徽省地质矿产勘查局321地质队安徽铜陵244033

冬瓜山铜矿是长江中下游成矿带铜陵矿集区内的一个大型铜矿。该矿床被惯称为矽卡岩型矿床,但具明显的层控特征。主矿体呈层状、似层状,赋存于上石炭统碳酸盐建造与下伏上泥盆统砂岩建造的接触带附近,主要由一系列层控块状含铜硫化物透... 详细信息

冬瓜山铜矿是长江中下游成矿带铜陵矿集区内的一个大型铜矿。该矿床被惯称为矽卡岩型矿床,但具明显的层控特征。主矿体呈层状、似层状,赋存于上石炭统碳酸盐建造与下伏上泥盆统砂岩建造的接触带附近,主要由一系列层控块状含铜硫化物透镜体、含铜矽卡岩透镜体、磁铁矿矿囊以及层状含铜黄铁矿-蛇纹石矿席组成。主矿体的底部为根植于上泥盆统砂岩建造内的层控脉状-网脉状矿,下部为层状含铜黄铁矿+蛇纹石矿席,主体为块状含铜硫化物透镜体与上覆硬石膏层构成的三个硫化物-硫酸盐韵律单元。该"双层结构"特征总体类似于VMS和SEDEX型矿床,但矿石结构构造表明,这些硫化物-硫酸盐沉积均不同程度地遭受了后期热液-变质作用叠加改造。层控含铜矽卡岩通常发育于块状含铜硫化物透镜体之上,小型磁铁矿矿体或矿囊通常围绕陡倾的闪长岩株零星分布。这两类矿化均与燕山期岩浆活动(约137Ma)和石英二长闪长岩株侵位密切相关。矿区可见两种蚀变作用:石英-绢云母蚀变与矽卡岩蚀变。前者在下盘砂岩中形成似整合蚀变带,包裹层控网脉状矿,其成因可解释为晚石炭世热液流体在海底之下砂岩透水层内发生侧向迁移、弥散排泄及金属卸载;后者由燕山期石英二长闪长岩侵位引起,形成两类矽卡岩,其中,镁质矽卡岩发育在层状含铜黄铁矿-蛇纹石矿席,钙质矽卡岩形成层控含铜矽卡岩透镜体。冬瓜山矿床80件硫化物样品的硫同位素δ34S组成介于0.5‰～8.8‰之间,伴生的硬石膏δ34S介于14.8‰～20.5‰之间,暗示两者的热液S有不同的来源:弱变质的细粒层纹状硬石膏,硫同位素δ34S为20.5‰,表明S来源于晚石炭世海水硫酸盐;弱变质的胶状细粒黄铁矿,δ34S变化于1.3‰～5.5‰之间,反映了热液S来自于海水硫酸盐的生物还原;热变质的晶质黄铁矿,硫同位素组成随结晶程度和颗粒大小的增加而升高(平均δ34S:4.4‰→5.3‰→5.7‰),暗示热液S可能部分来自矽卡岩-岩浆热液系统。冬瓜山矿床的矿化结构、矿体形态、结构构造、流体包裹体特征以及热液蚀变带与铜矿体的空间分布表明,冬瓜山铜矿是两期成矿叠加复合的产物:晚石炭世海底喷流-沉积作用,形成块状含铜硫化物矿化体,晚侏罗世岩浆侵位诱发矽卡岩-热液系统,叠加改造早期块状含铜硫化物和硫酸盐,形成以矽卡岩铜矿为主体的叠合型矿床。

关键词：矽卡岩铜成矿作用 SEDEX型块状硫化物热液叠加扬子成矿带

Stitching Perovskite Grains with Perhydropoly(Silazane)Anti-Template-Agent for High-Efficiency and Stable Solar Cells Fabricated in Ambient Air

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Energy & Environmental Materials 2023年第3期6卷 400-408页

作者： Ting wang Qu Yang Yanli Chen Qiong Peng Xiaosi Qi Hui Shen xuncheng Liu Shaohui Li Haixuan Yu Yan Shen Mingkui wang Xiu Gong College of Physics Guizhou Province Key Laboratory for Optoelectronic Technology and ApplicationGuizhou UniversityGuiyang 550025China College of Graduate Studies Guizhou UniversityGuiyang 550025China College of Materials and metallurgy Guizhou UniversityGuiyang 550025China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

All inorganic CsPbI_(3)perovskite solar cells(PSCs)have emerged as disruptive photovoltaic technology owing to their admirable photoelectric properties and the non-volatile active ***,the phase instability against moisture severely limits the fabrication environment for the high-efficiency devices,breaking through the confinement region to achieve scalable manufacturing has been the primary issue for future ***,we develop a curing-anti-solvent strategy for fabricating high-quality and stable black-phase CsPbI_(3)perovskite films in ambient air by introducing an inorganic polymer perhydropolysilazane(PHPS)into methyl acetate to form anti-template *** cross-linked PHPS reduces moisture erosions while the hydrolyzate silanol network(–Si(OH)_(4)^(–))controls the perovskite crystal growth by forming Lewis adducts with PbI_(2)during the *** polycondensation adduct of Si–O–Si/Si–O–Pb strongly binds to CsPbI_(3)grains as a shield layer to hamper phase *** the inorganic CsPbI_(3)perovskite thin-film with PHPS-modified anti-solvent processing as the light absorber,the n–i–p planar solar cell achieved an efficiency of 19.17%under standard illumination test *** importantly,the devices showed excellent moisture stability,retaining about 90%of the initial efficiency after 1000 h under 30%RH.

关键词： anti-template agent crystal growth perhydropolysilazane perovskite solar cells stability

REAL-t1, an Effective Approach for t1-Noise Suppression in NMR Spectroscopy Based on Resampling Algorithm

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Chinese Journal of Chemistry 2020年第1期38卷 77-81页

作者： Linhong Song Jiannan wang xuncheng Su Xu Zhang Conggang Li Xin Zhou Daiwen Yang Bin Jiang Maili Liu State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan National Laboratory for OptoelectronicsNational Center for Magnetic Resonance in WuhanKey Laboratory of Magnetic Resonance in Biological SystemsWuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhanHubei 430071China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Elemento-Organic Chemistry Collaborative Innovation Center of Chemical Science and EngineeringCollege of ChemistryNankai UniversityTianjin 300071China Department of Biological Sciences National University of Singapore14 Science Drive 4Singapore 117543Singapore

Summaryof main observation and conclusionIn multidimensional(nD)NMR spectroscopy,t1noise usually appears as ridges along indirect dimen-sions,and affects observation of weak *** main source of t1noise is instrumental instability,which causes random variation of FID amplitude during data acquisitions and introduces random noise-like peaks into spectrum after Fourier transformation.A number of efforts have been devoted,in order to develop new method or to improve existing approaches for suppressing ***,we propose a novel t1noise suppression method based on resampling algorithm for data processing,shortenedas *** method was verified using simulated 2D spectra,and NOESY spectra of sucrose and protein GB1,showing that the spectral quality was improved in all *** performance of REAL-t1was also compared with another recently pro-posed method,which showed that these two methods provided similar performance while REAL-t1cost much shorter experimental time.

关键词： REAL devoted random

Tracing soil erosion with Fe_(3)O_(4) magnetic powder: Principle and application

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International Soil and Water Conservation Research 2024年第2期12卷 419-431页

作者： Hongqiang Shi Gang Liu Xiaobing An Yajun Zhao Fenli Zheng Hairu Li Xunchang(John)Zhang xuncheng Pan Binglong Wu Xuesong wang State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationNorthwest A&F UniversityYanglingShaanxi712100China USDA-ARS Oklahoma and Central Plains Agricultural Research Center 7207 W.Cheyenne St.El RenoOK73036USA

Magnetic powder is regarded as an effective and economical tracer for estimating soil ***,the principle and application for using magnetic powder to estimate soil erosion are still not fully *** this study,magnetic powders with mean diameters of both 30 and 1μm were mixed into three soils at different mass *** relationship between magnetic susceptibility and the mass proportion of the introduced magnetic powder in the tagged soil,and the binding ability of magnetic powder to soil particles after both dry and wet sieving were *** accuracy of tracking soil loss by using magnetic powder as a tracer was *** results showed that there was a significant linear relationship between the magnetic susceptibility and the mass proportion of the introduced magnetic powder in the tagged *** relationship between the amount of soil captured by a magnet and the mass proportion of magnetic powder in the tagged soil indicated that soils were readily magnetized by magnetic powder,especially fine *** magnetic susceptibility of magnetic powder in different sizes of soil aggregates was variable.A majority of magnetic powder of both 30 and 1μm diameters was strongly bound with fine particles<0.05 mm in dry and wet *** the estimated tracer mass proportions,the relative errors between measured and estimated soil losses with enrichment correction factor were less than 18.3%under the simulated rain *** study not only reveal the principle of Fe_(3)O_(4) powder in soil erosion,but also improve its estimated precision of soil loss,which can make the tracing method by Fe_(3)O_(4) magnetic powder more useable in future.

关键词： Magnetic powder Magnetic susceptibility Binding ability Aggregate sizes Accuracy assessment