赵各庄矿地下水位时间序列数字滤波分析          下载免费PDF全文

殷传印  朱斌  司雯雯 《山东国土资源》2016,32(2)

为了更好地了解煤矿地下水位的变化趋势,结合工程实例,运用递归和非递归2种滤波技术进行分析,通过对比2种滤波技术的滤波效果,可以得到地下水位的变化规律和成因机理。结果表明:滤波系数的调校对滤波效果的影响至关重要。根据平滑度指标、均方根误差和信噪比对现有观测数据进行计算的结果可知,当b=0.5时递归滤波效果相对较好,当q=5时非递归滤波效果相对较好。滤波结果可以作为预测未来该地区地下水位变化趋势的依据,也可以为安全生产提供参考。  相似文献   

山东曹县地区土壤地球化学特征          下载免费PDF全文

邱成贵  张桂林  王东平  张斌  毕征峰  张朋朋 《山东国土资源》2016,32(5)

山东省曹县地区土壤地球化学调查是按浅层土壤样品1点/4 km~2,深层土壤样品1点/16 km~2。测试N,P,K,Cu,Zn,B,Mo,Mn,F,As,Hg,Pb,Cr,Cd等14种指标。在统计这些指标的表层、深层土壤地球化学特征参数的基础上,对其与世界、全省同类参数的差异进行了分析,并分析了区内表层、深层土壤元素含量的相关性,认为该区表层土壤元素含量的显著特征是高F而低P,Zn,Mo。大部分元素在表层土壤中的含量继承了土壤母质的成分特征,但N,P,F,Hg等受人为活动和污染源的作用在表层土壤中明显富集。  相似文献   

胶东埠上金矿煌斑岩地球化学特征及成因          下载免费PDF全文

马晓东  孙雨沁  孙斌  彭庆吉  夏传波  宋英昕  刘晶  李济 《山东国土资源》2016,32(1)

大量的研究资料表明煌斑岩与金矿在空间上、时间上具明显的对应关系。埠上金矿位于胶东玲珑金矿田西南方向的金岭金矿田的中北部;有关该矿区煌斑岩的研究资料较少。该文结合岩石学、矿物学、大地构造学等特征,对区内煌斑岩的地球化学进行了研究,揭示其内在成因,认为区内煌斑岩是因该区受到古太平洋板块的俯冲、华北板块与杨子板块碰撞造山及郯庐断裂带等构造岩浆活动的影响,俯冲洋壳析出的流体交代地幔形成的具氧化性的EM1型富集型地幔岩浆于造山拉张期在大陆活动边缘浅成侵入而成的。  相似文献   

新疆额尔宾山花岗岩侵位年龄和成因及其对南天山洋闭合时代的限定     

杨莉  陈文  张斌  尹继元  孙敬博  李洁  喻顺  杨静  袁霞 《地质通报》2016,35(1):152-166

额尔宾山花岗岩岩体位于南天山晚古生代侵入岩带,对该花岗岩进行锆石U-Pb定年获得296.1±1.8Ma的年龄,为早二叠世。岩石主量元素分析结果表明,该花岗岩的Si O2含量为66.96%~67.3%,富碱(Na2O+K2O=7.53%~7.97%),K2O/Na2O1(1.15~1.27),属高钾钙碱性系列岩石;Al2O3为15.56%~15.62%,Al2O3K2O+Na2O+Ca O,属于过铝型。岩石稀土元素配分模式呈现轻稀土元素(LREE)富集((La/Yb)N=27.03~30.62)、重稀土元素(HREE)亏损((LREE/HREE)=18.2~20.1)、具有中等程度的负Eu异常(δEu=0.64~0.68)。微量元素判别结果显示,其具有I-A型花岗岩过渡的特征。结合区域地质背景综合分析,初步认定该岩体可能形成于南天山同碰撞向后碰撞构造体制转换时期,据此可以推测南天山洋盆闭合时限至少应该在早二叠世以前。  相似文献   

Zircon M127 – A Homogeneous Reference Material for SIMS U–Pb Geochronology Combined with Hafnium,Oxygen and,Potentially, Lithium Isotope Analysis          下载免费PDF全文

Lutz Nasdala  Fernando Corfu  John W. Valley  Michael J. Spicuzza  Fu‐Yuan Wu  Qiu‐Li Li  Yue‐Heng Yang  Chris Fisher  Carsten Münker  Allen K. Kennedy  Peter W. Reiners  Andreas Kronz  Michael Wiedenbeck  Richard Wirth  Chutimun Chanmuang  Manuela Zeug  Tamás Váczi  Nicholas Norberg  Tobias Häger  Alfred Kröner  Wolfgang Hofmeister 《Geostandards and Geoanalytical Research》2016,40(4):457-475

In this article, we document a detailed analytical characterisation of zircon M127, a homogeneous 12.7 carat gemstone from Ratnapura, Sri Lanka. Zircon M127 has TIMS‐determined mean U–Pb radiogenic isotopic ratios of 0.084743 ± 0.000027 for ²⁰⁶Pb/²³⁸U and 0.67676 ± 0.00023 for ²⁰⁷Pb/²³⁵U (weighted means, 2s uncertainties). Its ²⁰⁶Pb/²³⁸U age of 524.36 ± 0.16 Ma (95% confidence uncertainty) is concordant within the uncertainties of decay constants. The δ¹⁸O value (determined by laser fluorination) is 8.26 ± 0.06‰ VSMOW (2s), and the mean ¹⁷⁶Hf/¹⁷⁷Hf ratio (determined by solution ICP‐MS) is 0.282396 ± 0.000004 (2s). The SIMS‐determined δ⁷Li value is ?0.6 ± 0.9‰ (2s), with a mean mass fraction of 1.0 ± 0.1 μg g^?1 Li (2s). Zircon M127 contains ~ 923 μg g^?1 U. The moderate degree of radiation damage corresponds well with the time‐integrated self‐irradiation dose of 1.82 × 10¹⁸ alpha events per gram. This observation, and the (U–Th)/He age of 426 ± 7 Ma (2s), which is typical of unheated Sri Lankan zircon, enable us to exclude any thermal treatment. Zircon M127 is proposed as a reference material for the determination of zircon U–Pb ages by means of SIMS in combination with hafnium and stable isotope (oxygen and potentially also lithium) determination.  相似文献   

阿尔金北缘岩石变形机制——来自X光组构分析的证据     

何江涛  陈柏林  王永  孟令通  吴玉  韩梅梅  王斌 《地质通报》2016,35(1):123-129

对阿尔金北缘地区变形蚀变花岗岩、花岗质糜棱岩、变形酸性火山岩和变形英安质凝灰岩中石英和绢云母2种矿物进行X光岩石组构分析,认为本区岩石变形比较明显,宏观面理近于东西向展布,绢云母变形较强,平行于面理定向排列;而石英以底面或近底面滑移为主,部分样品兼有柱面Ⅰ型滑移和柱面Ⅱ型滑移,反映本区岩石变形机制为中浅层次的脆-韧性变形(10~15km、250~350℃、0.25~0.40GPa)。通过岩石组构特征与宏观面理产状,推断本区韧性变形以右行运动为主,与板块碰撞在阿尔金北缘大平沟地区产生的韧性变形带特征一致。  相似文献   

Testate amoebae as indicators of water quality and contamination in shallow lakes of the Middle and Lower Yangtze Plain     

Yangmin Qin  Richard Payne  Xiangdong Yang  Min Yao  Jiantao Xue  Yansheng Gu  Shucheng Xie 《Environmental Earth Sciences》2016,75(7):627

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Immobilization of copper under an acid leach of colloidal pyrite waste rocks by a fixed-bed column     

Yan Yang  Tianhu Chen  Ping Li  Chengsong Qing  Qiaoqin Xie  Xinmin Zhan 《Environmental Earth Sciences》2016,75(3):205

Colloidal pyrite waste rocks (CPWR) which are mainly composed of colloidal pyrite and siderite widely deposit in sulfide mines in the middle and lower reaches of the Yangtze River belt, China, especially in Tongling City, Anhui Province, China. In this paper, a fixed-bed column was used to investigate the weathering and oxidation of CPWR and its role in immobilizing low-concentration Cu (10 mg L^?1) under weakly acidic leach (pH = 5.0). The experimental results indicated that the breakthrough capacity was around 14.0 mg Cu g^?1 CPWR when Cu²⁺ breakthrough concentration was 0.5 mg L^?1. Sequential extraction of Cu and dithionite–citrate–bicarbonate extraction of free iron in the used CPWR after the column breakthrough indicated that Cu removal by CPWR consisted of the following processes: oxidation of pyrite and dissolution of siderite in CPWR, ferrous oxidation, and adsorption of Cu on ferric (hydr)oxides. This study shows the potential application of CPWR as an effective sorbent for the removal of low-concentration Cu from acid mine drainage.  相似文献   

Impacts of land management on ecosystem service delivery in the Baiyangdian river basin   总被引：1，自引：0，他引：1  

Yang Bai  Bo Jiang  Juha M. Alatalo  Changwei Zhuang  Xiaoyuan Wang  Lijuan Cui  Weihua Xu 《Environmental Earth Sciences》2016,75(3):258

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Areal subsidence under pumping well–curtain interaction in subway foundation pit dewatering: conceptual model and numerical simulations     

Jianxiu Wang  Yuanbin Wu  Xiaotian Liu  Tianliang Yang  Hanmei Wang  Yanfei Zhu 《Environmental Earth Sciences》2016,75(3):198

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