An integrated data-directed numerical method for estimating the undiscovered mineral endowment in a region

An integrated data-directed numerical method has been developed to estimate the undiscovered mineral endowment within a given area. The method has been used to estimate the undiscovered uranium endowment in the San Juan Basin, New Mexico, U.S.A. The favorability of uranium concentration was evaluated in each of 2,068 cells defined within the Basin. Favorability was based on the correlated similarity of the geologic characteristics of each cell to the geologic characteristics of five area-related deposit models. Estimates of the undiscovered endowment for each cell were categorized according to deposit type, depth, and cutoff grade. The method can be applied to any mineral or energy commodity provided that the data collected reflect discovered endowment.     

煎茶岭镍矿床成矿作用特征

煎岭镍矿与同类矿床相比,具有特殊的地质、地球化学物征，是一种特殊类型镍矿。本矿床流体包裹体同位素特征，表现出成矿体为岩浆与地层两端元混合趋势，成矿流体分属于Mg2+-Ca2+-Na+-F-(Cl-)型。根据 Pb、Sr、O、H、C 同位素及 REE资料，作者认为该镍矿的形成与后期酸性岩浆活动有密切关系，后期岩浆活动为成矿提供热力与热液，使成矿元素活化迁移、富集。本文最后提出了初步的成矿模式。     

The Evolutionary History of Ore-forming Processes of Metallic Ore Deposits in Northern Guangxi1

Abstract The northern Guangxi region is an important rare metal, rare earth metal and polymetallic metallogenic province. In the region there exist five metallogenic series and two metallogenic subseries, whose metallogenesis shows features of polycyclic spiral evolution throughout the geological history. As far as various cycles are concerned, mantle-derived ore substances were reduced while crust-derived ore substances increased from early to late times; in the whole geological evolutionary history, mantle-derived substances decreased gradually while crust-derived ones increased. Meanwhile ore element associations became more and more varied. In terms of space, mineralization migrated from the old basement outwards, i.e. from west to east during the Precambrian, and from north to south during the Phanerozoic, and again from east to west during the Yanshanian.     

504铀矿床成因探讨

铀矿赋存于∈_(1q)(清虚洞组)、∈_(2(?))(石冷水组)中,与黑色蚀变关系密切。矿化受F_1,F_2断层控制。根据矿床地球化学特征和区域地层铀的平均丰度,表明504铀矿床是以∈_(1(?))(牛蹄塘组)为矿源层的中低温热卤水强烈改造层控矿床。铀矿的形成与∈_(1n)有机质热裂解向石油转化以及石油的运移、逸散全过程有关。     

垭头铀矿床控矿沉积相及成因

垭头铀矿是湘西沅麻盆地白垩系红层中较为典型的沉积矿床,位于盆地东北缘,靠雪峰隆起,置于Z_b,(?)_(1x),地层之上。本文是在综合野外实践的基础上,研究矿床的沉积特点、控矿沉积相以及矿床成因。     

冀北坝上地区深部地质构造特征及其对火山活动和铀成矿的控制作用

冀北坝上地区位于华北地台北缘。其深部地质构造有两个显著特征：一是全区性的莫霍面下拗，地壳增厚；二是软流圈部分伸入到下岩石图上部，造成局部地区地幔上隆，地壳减薄。火山喷发形成的沽源火山盆地和大滩火山盆地与两个地幔上隆，地壳减薄区，上下相互对应。铀矿床（点）沿地幔隆起周边构造活动带规律性分布。上述两事实有力地证明了深部地质构造对中新生代火山活动和铀成矿的控制作用。沿地幔隆起周边构造活动带是今后寻找铀及多金属矿产的有利地段。     

新疆天格尔金矿成矿带矿物包裹体研究

天格尔金矿成矿带矿物包裹体的均一温度、爆裂温度、成矿压力、气相成分及物理化学条件的研究表明，金矿化可分为两个成矿阶段，矿化深度１～１．５ｋｍ，成矿热液具有酸性还原特性，金是以金硫络合物形式迁移沉淀的。     

微生物地球化学探矿—蜡样芽孢杆菌法寻找金,铀矿的试验研究

壤中蜡样芽孢杆菌找矿法是微生物地球化学探矿方法之一。本文叙述了蜡样芽孢杆菌法的找矿原理、野外工作方法、室内测量技术、野外初步试验的地质效果以及测量中应注意的若干问题。在已知隐伏金矿床（点）和铀矿床（点）上测得了明显的蜡样芽孢杆菌计数异常，并在４６０铀（钼）矿床外围的铀矿化远景地段进行了试验，地质效果较为理想。     

湖南区域内生金成矿学分析与找矿预测

以湖南及邻区为例，对黄金成矿学及成矿区域预测进行初步分析。从研究现状出发，对内生、外生、区域成矿加以探讨。最后提出成矿预测问题。