http://www.sciencedirect.com/science/article/pii/S1674987112000357

Field and remote sensing studies reveal that Au-bearing quartz±carbonate lodes in Romite deposit,in the extreme South Eastern Desert of Egypt,are controlled by NNE-striking shear zones that splay from the ca.660—550 Ma Hamisana Zone.Quartz in releasing bends with sinistral shear geometry and abundant boudinaged quartz-carbonate lodes with serrate ribboned fabrics suggest vein formation throughout a transpressive wrench system.Ubiquitous hydrothermal quartz,carbonate,and subordinate chlorite and sericite within the shear zones and as slivers in veins,indicate that gold deposition and hydrothermal alteration occurred under greenschist fades conditions.The Al（Ⅳ） in chlorite indicates a formation temperature of～300℃.comparable with temperatures estimated from arsenopyrite composition for grains intimately associated with gold in quartz veins. The new geological and geochemical data indicate that splays off the Hamisana Zone are potential gold exploration targets.Quartz veins along the high order（2nd or 3rd） structures of this crustal-scale shear zone are favorable targets.In the Romite deposit and in surrounding areas,a Au-As-Cu-Sb-Co-Zn geochemical signature characterizes mineralized zones,and particularly rock chips with>1000 ppm As and high contents of Cu,Zn,and Co target the better mineralized areas. The carbonateδ¹³C_pdb andδ¹⁸O_Smow isotope signatures preclude an organic source of the ore fluid,but metamorphic and magmatic sources are still valid candidates.The intense deformation and lack of magmatism in the deposit area argue for metamorphic dewatering of greenstone rocks as the most likely fluid source.The narrow ranges ofδ¹³C（-4.6‰to -3.1‰） andδ¹⁸O（11.9‰-13.7‰） in carbonate minerals in lodes imply a corresponding uniformity to the ambient temperature andδ¹³C_CO2(δ¹³C_∑C) of the ore fluids. The calculatedδ¹⁸Oh₂o values of 6.9‰—7.9‰for ore fluids,based onδ¹⁸O values of vein quartz further suggest a likely metamorphic origin.     

http://www.sciencedirect.com/science/article/pii/S1674987111000429

The three most crucial factors for the formation of large and super-large magmatic sulfide deposits are: (1) a large volume of mantle-derived mafic-ultramafic magmas that participated in the formation of the deposits; (2) fractional crystallization and crustal contamination, particularly the input of sulfur from crustal rocks, resulting in sulfide immiscibility and segregation; and (3) the timing of sulfide concentration in the intrusion. The super-large magmatic Ni-Cu sulfide deposits around the world have been found in small mafic-ultramafic intrusions, except for the Sudbury deposit. Studies in the past decade indicated that the intrusions hosting large and super-large magmatic sulfide deposits occur in magma conduits, such as those in China, including Jinchuan (Gansu), Yangliuping (Sichuan), Kalatongke (Xinjiang), and Hongqiling (Jilin). Magma conduits as open magma systems provide a perfect environment for extensive concentration of immiscible sulfide melts, which have been found to occur along deep regional faults. The origin of many mantle-derived magmas is closely associated with mantle plumes, intracontinental rifts, or post-collisional extension. Although it has been confirmed that sulfide immiscibility results from crustal contamination, grades of sulfide ores are also related to the nature of the parental magmas, the ratio between silicate magma and immiscible sulfide melt, the reaction between the sulfide melts and newly injected silicate magmas, and fractionation of the sulfide melt. The field relationships of the ore-bearing intrusion and the sulfide ore body are controlled by the geological features of the wall rocks. In this paper, we attempt to demonstrate the general characteristics, formation mechanism,tectonic settings, and indicators of magmatic sulfide deposits occurring in magmatic conduits which would provide guidelines for further exploration.     

汝州市地矿局采矿权挂牌出让公告 汝地矿公告〔2014〕2号

根据有关法律法规的规定,汝州市地质矿产局决定以挂牌方式公开出让3宗采矿权。现将有关事宜公告如下： 一、拟出让采矿权基本情况 二、中华人民共和国境内具有独立法人资格的公司、企业、个人和其他组织均可参加,其资格须经汝州市矿业权交易中心审查确认。 三、本次采矿权挂牌出让采用增价方式,遵循价高者得的原则确定竞得人。 四、本次出让不接受联合竞买,不接受邮寄、电子邮件、口头等其他方式申请。本次出让的详细资料和具体要求见出让文件。申请人可于2014年11月3日至2014年11月23日15时（节假日除外）到汝州市矿业权交易中心领取采矿权挂牌出让文件。     

Metallogenic Model of Bauxite in Central Guizhou Province: an Example of Lindai Deposit

The bauxites in central Guizhou are hosted by the Lower Carboniferous Jiujialu Formation.Geochemistrial characteristics of the Lindai bauxite deposit indicate that the underlying Shilengshui Formation dolomite is the precursor rock of mineral resources.Weathering simulation experiments show that Si is most likely to migrate with groundwater,the migration rate of which is several magnitude higher than Al and Fe under nature conditions （pH=3-9）.The neutral and acid nonreducing condition is the most conducive to the Al rich and Si removal,while the acid reducing conditions is the most conducive to the Al rich and Fe removal.In the process of bauxite formation,coal beds overlying the Al-bearing rock series or other rock formation rich in organic materials can produce acid reducing groundwater,which are important for the bauxite formation.Finally,propose the metallogenic model of the bauxite in central Guizhou Province and put forward three new words which are ＂original bauxite material＂,＂bauxite material＂ and ＂original bauxite＂.     

Estimation of residual shear strength ratios of liquefied soil deposits from shear wave velocity

For sites susceptible to liquefaction induced lateral spreading during a probable earthquake, geotechnical engineers often need to know the undrained residual shear strength of the liquefied soil deposit to estimate lateral spreading displacements, and the forces acting on the piles from the liquefied soils in order to perform post liquefaction stability analyses. The most commonly used methods to estimate the undrained residual shear strength (Sur) of liquefied sand deposits are based on the correlations determined from liquefaction induced flow failures with SPT and CPT data. In this study, 44 lateral spread case histories are analyzed and a new relationship based on only lateral spread case histories is recommended, which estimates the residual shear strength ratio of the liquefiable soil layer from normalized shear wave velocity. The new proposed method is also utilized to estimate the residual lateral displacement of an example bridge problem in an area susceptible to lateral spreading in order to provide insight into how the proposed relationship can be used in geotechnical engineering practice.     

银根收紧成定局,加息在路上 湖南房价走到十字路口

<正>2009年中国经济触底并反弹。中国房地产业也坐了一轮过山车,先是叫冷,后是喊热。09年初房地产项目大量停工,销售中心门可罗雀、群体退房时有所闻,断供事件不绝于耳、土地流拍屡屡见诸报     

六提存款准备金难撼房价

为何准备金提高到历史最高却撼不动房价，这在于长期的流动性过剩泛滥太久。     

数字

3.60%、6.66%继本月8日中国人民银行决定下调基准利率后,中国人民银行近日再次宣布,从2008年10月30日起下调金融机构人民币存贷款基准利率。其中一年期存款基准利率由现行的3.87%下调至3.60%,下调0.27个百分点。一年期贷款基准利率由现行的6.93%下调至6.66%,下调0.27个百分点;其他各档次存、贷款基准利率相应调整。个人住房公积金贷款利率保持不变。     

河南省银行业发展格局及其与区域经济发展关系研究

从金融地理学的视角,以河南金融统计资料为基础,分析了河南省银行业的市场竞争结构、区域空间发展格局,及区域银行业发展与区域经济发展关系.分析表明,河南银行业具有以下特征:国有商业银行市场份额在下降,其他银行机构市场份额上升;区域银行业发展差异扩大,河南省银行业向郑州集中;省内区域间资金流动加速,区域存款、贷款规模和区域经济总量、GDP的相关性不断下降.最后,从区域、银行互动角度,提出了通过银行业的健康良性发展推动河南经济快速发展的对策.