全国金矿资源潜力预测

利用"全国区域地球化学勘查数据库"等全国性基础地质数据库数据,对全国分区进行金成矿统计预测;根据信息量异常分布,结合大地构造背景、主要控矿因素等,将全国划分为64个金矿找矿远景区;并用信息量转换法估算全国1000m以浅金矿资源总量约为43500t,资源潜力36500t。     

The Hg geochemistry of a geothermal stream, Steamboat Creek, Nevada: natural vs. anthropogenic influences

 A series of water samples from Steamboat Creek, Nevada, was analyzed for total mercury concentrations. Concentrations from these waters were 40 to 60 times higher than the pristine mountain streams entering the creek. The major source of the mercury entering Steamboat Creek is probably from gold/silver processing that took place in the 1860s. Received: 10 March 1997 · Accepted: 2 September 1997     

Recent studies on surface water–groundwater relationships at hydro‐projects in India using environmental isotopes

Environmental isotopes (²H or D, ¹⁸O, ³H), along with geology, hydrochemistry and in situ physicochemical parameters (EC, T, DO, pH) were employed to study surface water (reservoir, lake)–groundwater (spring) relationships at (1) Nagewadi, a minor irrigation project in the State of Maharashtra, Western India; (2) Kanhirapuzha reservoir in the State of Kerala, Southern India and (3) Ghatghar Pumped Storage Hydroelectric Project in the State of Maharashtra, Western India for the purpose of understanding the seepage/leakage and its associated problems. The studies concluded that the springs found downstream of the Nagewadi project originate from the reservoir and not from the abutments or shallow aquifers. The Kanhirapuzha reservoir receives a substantial base‐flow component compared to riverine inputs. The reason for the water‐logging problem at a nearby downstream village during the non‐summer periods is due to the change in the upstream groundwater flow direction under reservoir filling conditions and is not due to reservoir leakage. Most of the springs in the approach tunnel to the underground power house of the Ghatghar Project originate from the lower reservoir and not from the upper reservoir or the overburden rock matrix. The above case studies illustrate the diversity of environmental isotope applications in surface water (reservoir, lake)–groundwater (spring) relationships related to sustainability of hydro‐projects. Copyright © 2008 John Wiley & Sons, Ltd.     

新疆东准噶尔中酸性浅成岩金、铜成矿系列

中酸性浅成岩金，铜矿床是新疆东准噶尔地区一个重要的新成矿系列，通过总结有关中酸性小岩体及其典型矿床的基本特征，将该成矿系列划分为浅成岩－构造蚀变岩型金矿，类夕卡岩型铜钼矿，细脉浸染型（斑岩型）铜，金矿及隐爆角砾岩型脉状铜矿等基本矿化类型，并探讨了有关典型矿床的REE特征，建立了该成矿系列的总体成矿模式，认为该成矿系列受控于海西中晚期的中酸性浅成小杂岩体，其岩石化学成分，REE特征及成矿作用方式具有明显的相似性。     

Reviewing urban revitalisation strategies in Rio de Janeiro: from urban project to urban management approaches

This paper describes key urban development strategies pursued during the last seven years by the Municipality of Rio de Janeiro, the second largest city in Brazil. It discloses internal processes, organisational restructuring of the municipality and institutional changes geared to increase effective urban management and resource mobilisation required to implement multiple sector programmes and key projects in several locations in the city like Favela Bairro and Rio Cidade Programmes, The Rio Strategic Plan, etc. It is argued that the formation of interdepartmental working groups for better horizontal articulation of policy making and implementation, the creation of the financial and accounting unit, the decentralisation of authority towards sub-municipality levels, and capacity strengthening of its personnel – among other things – have made a positive impact on the performance of local government. The paper further highlights a significant change towards policies of urban consolidation and revitalisation of declined areas of the city supported by heavy public investments and the effort towards broader civil society involvement in municipal projects. Municipal autonomy, problem-solving and result-oriented type of planning and management and organisational change are some of the lessons pinpointed by the paper for a city of that size and complexity.     

甘肃马泉金矿二十号矿带地质特征

通过对二十号矿带与矿床主体三、四号矿带地质特征的对比和ZK4 0 1孔伴生元素特征的研究 ,认为二十号矿带是四号矿带东延部分 ,其露头位于矿体头部附近。预测在二十号矿带180 0m标高以下一定还有较大盲矿体存在。     

岩体与金矿的关系——以李坝式金矿为例

金矿床、矿点往往围绕岩体分布 ,而中酸性岩体与金矿床的关系已引起众多勘查学家的重视。通过在李坝金矿床的工作和研究认为 :岩体与金矿床是同一构造—热事件的产物 ,其成矿物质来源于深部地壳 ,成矿流体在构造带热梯度场的驱动下构成环流热液 ,并由深部地层水、大气降水和岩浆水共同组成 ,在深部通过水—岩相互作用汲取成矿物质向上运移到构造减压带后 ,载金物质卸载成矿 ,形成了特定的围岩蚀变。     

东坪金矿矿石碲、金分布及其相关性

用原子吸收，原子荧光法分别系统测定矿石Au,Te含量表明，东坪金矿具有典型的Au-Te元素组合，Te/Au比值平均为0．71，且随矿石Au丰度的加富而增加，它们的相关系数增大，Au,Te含量对数值的统计分布和矿物组合，元素赋存状态的微束分析结果表明，Au,Te均以独立矿物为主要赋存状态，但Aud的矿化表现出多期次特征，而Te主要在硅化－硫化物阶段，二可能具有不同的母源，上述结论对提高金的回收率，碲的综合利用和事矿体的追索提供一定的依据。     

李坝式金矿的找矿标志及找矿方法

甘肃省礼（县）岷（县）东部分布有十多处独具特征的李坝式微细浸染型金矿床（点）。根据“断裂＋岩体（脉）＋有利岩性＋物化探异常＋围岩蚀变＝矿体”五位一体综合找矿标志与“六阶段－多方法”找矿方法在找矿预测中取得了明显效果。     

邵武金坑金矿区构造控矿特征与成因探讨

金坑金矿区是闽北地区有代表性的矿床类型之一。矿区金的富集成矿作用与属于同熔型的燕山早期熊村岩体及其补充体——(石英)闪长玢岩脉关系十分密切。控岩(闪长玢岩脉)控矿构造为刀背顶背斜北西翼层间滑动破碎带,以及在刀背顶背斜核部轴面劈理的基础上利用、改造而发展起来的断裂构造破碎带。