胶东西北部断裂构造与成矿作用研究

以控矿断裂构造因素为主线，探讨分析断裂构造与含矿流体生成、运移、分配、聚集机制的关系，建立起断裂构造、围岩蚀变及矿化分带的对应关系，强调指出矿化类型及矿化组合分布以水平为主的空间分带特征。从构造地球化学角度，对断裂构造活动与地球化学行为在时空联系上进行了解析，加深了对区域构造控矿规律的认识     

隐伏铀资源潜力预测地球化学评价参数及指标体系

1地球化学评价参数及指标体系隐伏铀资源潜力预测地球化学评价以成矿规律和技术—经济条件保证程度的双控制因素和优选性作为准则,其地球化学评价参数及指标体系主要包括:(1)成矿特征参数:矿石,矿物,矿石结构构造、矿床的矿物和化学成分及分带性,矿体的围岩蚀变及分带性,矿床形成条件、温度、压力,矿     

环形构造中与二长安山岩岩浆作用有关的金矿化地球化学特征及地球化学浓集场的分布规律(以东外贝加尔卡里矿区为例)

本文论述了与伴有二长安山岩岩浆作用穹窿环形构造相联系的含矿岩浆体系中金矿化和地球化学浓集场的演化。指出从属于地球化学浓集场的不同规模成矿目标体的分带性(表现为高温的Bi-W型地球化学浓集场被较低温的Au-As型所代替)取决于中心岩体的影响。各工业矿物组合的分离是成矿过程各阶段减荷中心不断位移的结果。还确定了本区成矿预测和远景评价的准则为:地球化学浓集场的浓集度和规模;地球化学分带性;工业矿化的地球化学特征。     

赛乌素金矿床的某些地球化学特征及地球化学找矿标志

论述了赛乌素石英脉型金矿床的某些地球化学特征、含金与不含金石英脉的区别及含金石英脉赋矿部位的地球化学特征。重点是论述含金石英脉的地球化学垂直变化规律和异常分带特点。总结出石英脉的含矿(金)预测标志。     

新疆石英滩金矿床原生晕特征与隐伏矿预测

通过对新疆东天山石英滩金矿床L4矿体各开采中段及钻孔的岩石系统采样分析和计算统计,确定了该金矿床的地球化学原生晕指示元素的组合特征、轴向分带、横向分带和纵向分带.结合国内外对该类型金矿原生晕地球化学特征和分带性研究成果,建立了本区该类型金矿床轴向分带的理想模型,预测深部隐伏矿体的可能位置,为本区寻找和勘察隐伏金矿提供了较为可靠的地球化学依据.     

断裂的垂直构造地球化学分带与成矿

断层岩具有构造-化学二重性,断裂混合岩是一种更深位的断层岩.由此,R.H.Sibson提出的断层(岩)垂直分带双模式,可扩展为垂直构造地球化学分带三模式.自上而下为:碎裂岩带;糜棱岩带;断裂混合岩带.不同的带有不同的变形-地球化学特征和成矿专属性.     

华南含金建造的地球化学特征

本文主要讨论华南含金建造中金及其有关微量元素的地球化学特征,并对含金建造类型的划分和据金成矿能量的形成与地质-地球化学环境进行金矿床类型划分的设想.     

攀西古裂谷构造-岩浆作用模式

根据 1∶ 5× 10 4区域地质调查资料 ,从攀枝花地区华力西期岩浆岩的侵位方式、侵位深度、分带性及岩石化学、微量元素地球化学等方面 ,论述攀枝花地区该期构造岩浆作用的规律性 ,并根据岩石、地层的分布情况和剥蚀深度 ,提出攀西古裂谷具“双裂谷模式”特征 ,与东非裂谷有相似性     

山东临朐铁寨金矿区地球化学特征

通过对铁寨金矿区各类岩石、矿石、成矿作用及矿体的地球化学特征的研究,提出了该矿区的原生地球化学找矿模式,即该区岩浆岩、沉积岩、蚀变岩及成矿作用的地球化学标志和矿体原生晕的分带性标志.     

金矿床地球化学分带的一种新类型

在整个矿床或矿柱内,元素组合分布的地球化学同心分带是由于成矿溶液依次进入被渗滤作用复杂化的卸载地带时的特殊分异的结果。这种地球化学分带新类型对原有的地球化学分带被破坏和复杂化的复生矿床,以及对深部和翼部矿化的预测和评价成为可能。     

内蒙古额济纳旗道噶地区土壤地球化学特征及找矿方向

内蒙古额济纳旗道噶地区矿化类型为石英脉型,见含Au石英脉出露。通过对该地区进行土壤地球化学测量工作,在统计研究区各地层Cu、Ag、Au、Pb、Zn、Sb、Mo、Ni、Co、W、As、Sb等微量元素含量基础上,应用聚类分析方法分析元素间相关关系。在研究区圈定出61处单元素异常区,其中Au元素异常8处。根据地球化学异常分类规范,综合考虑地球化学异常的规模、形态、异常的强度、分带性、异常元素的组合及异常区成矿地质条件和地球化学条件,在单元素异常的基础上圈定出乙类综合异常区2个(Ⅰ号、Ⅱ号综合异常区),丙类综合异常区1个(Ⅲ号综合异常区)。在对研究区地质特征及土壤地球化学特征的基础上圈定出3个找矿靶区,并进行地表工程验证,为进一步找矿工作提供有利依据。     

陕西省区域环境地球化学分区

为了利用地壳元素分布特征与动植物微量元素含量间的关系,指导生态环境综合治理,借助已有的基础地球化学资料,进行陕西省地球化学分区,确定各分区的环境背景值、污染起始值、缺乏临界值、过剩值临界值,并将陕西省分为陕北、关中、陕南3个地球化学区,圈定了1个元素贫化区和2个元素富集区。提出应该在元素的缺乏和过剩的异常区内进行生物体内微量元素含量的定期检测。做到对地球化学疾病及时发现及时寻找对策,以保证人类生存环境的安全,提高生存质量。     

胶东山城金矿叠加分带序列分解与叠加矿化性质识别

为适应地球化学分带的复杂性,定义了叠加分带序列和矿化阶段分带序列的概念,提出了叠加分带序列分解及叠加矿化性质识别方法。在胶东山城金矿岩石地球化学勘查中该方法获得成功的应用。揭露了该矿区已知矿体的常规分带序列中隐含的两种矿化叠加性质：１号脉为无工业意义的矿化叠加;８号脉则主要为下部隐伏矿体的叠加,并已得到后期勘探验证。     

Anomalous structures of geochemical fields of hydrothermal gold deposits: Formation mechanism,methods of geometrization,typical models,and forecasting of ore mineralization

The results of the study of anomalous structures of geochemical fields (ASGF) accompanying hydrothermal gold deposits are considered. A model of the formation of such structures in the course of development of hydrothermal ore-metasomatic systems is proposed. The existing methods of detection and geometrization of ASGF are evaluated. The elaborated technique of the study of anomalous geochemical fields is based on standardized unbiased indexes assigned to detection and geometrization of anomalous structures. A classification of ASGF at hydrothermal gold deposits has been developed. General features due to the universal mechanism of functioning of hydrothermal systems and specific features related to the localization and metallogenic specialization of particular kinds of ore mineralization are identified for the studied geological and economic types of gold deposits. The elaborated technique of quantitative characterization of ASGF parameters comprises the geometrization of anomalous structures, calculation of the coefficient of ordering, and computation of the productivities of standardized indexes of zoning. The established regular variation of quantitative parameters of ASGF with depth may be applied to the estimation of the erosion level of ore-bearing structural units in ore fields and deposits.     

The application of geochemical pattern recognition to regional prospecting: A case study of the Sanandaj–Sirjan metallogenic zone,Iran

In regional exploration programs, the distribution of elements in known mineral deposits can be used as a guide for the classification of deposits, search for new prospects and modeling ore deposit patterns. The Sanandaj–Sirjan Zone (SSZ) is a major metallogenic zone in Iran, containing lead and zinc, iron, gold, copper deposits. In the central part of the SSZ, lead and zinc mineralization is widespread and hitherto exploration has been based on geological criteria. In this study, we used clustering techniques applied to element distribution for classification lead and zinc deposits in the central part of the SSZ. The hierarchical clustering technique was used to characterize the elemental pattern. Elements associated with lead and zinc deposits were separated into four clusters, encompassing both ore elements and their host rock-forming elements. It is shown that lead and zinc deposits in the central SSZ belong to two genetic groups: a MVT type hosted by limestone and dolomites and a SEDEX type hosted by shale, volcanic rocks and sandstone. The results of elemental clustering were used for pattern recognition by the K-means method and the respective deposits were classified into four distinct categories. K-means clustering also reveals that the elemental associations and spatial distribution of the lead and zinc deposits exhibit zoning in the central part of the SSZ. The ratios of ore-forming elements (Sb, Cd, and Zn) vs. (Pb and Ag) show zoning along an E–W trend, while host rock-forming elements (Mn, Ca, and Mg) vs. (Ba and Sr) show a zoning along a SE–NW trend. Large and medium deposits occur mainly in the center of the studied area, which justify further exploration around occurrences and abandoned mines in this area. The application of a pattern recognition method based on geochemical data from known mineralization in the central SSZ, and the classification derived from it, uncover elemental zoning, identify key elemental associations for further geochemical exploration and the potential to discover possible target areas for large to medium size ore deposits. This methodology can be applied in a similar way to search for new ore deposits in a wide range of known metallogenic zones.     

氡气勘查地球化学技术的研究与应用--氡气异常在百色盆地的指示效果

阐述在我国南方百色地区复杂的地球化学景观条件下，氧气勘查地球化学技术能否有效地发现地下油田的分布范围并准确地圈出它们埋藏位置的应用研究成果。指出在百色盆地不同类型油田上方和周边都有较好的氧气异常显示，且氧气异常分布形态特征与笔者建立的异常模式相吻合。认为氧气勘查地球化学技术在我国南方复杂景观条件下有较好的指示效果。     

因子分类法在黑龙江塔河地区地质填图中的应用

利用因子分类法在黑龙江塔河地区进行地球化学单元识别,根据各单元的理论地球化学意义及其与地质单元的对应关系,进行浅覆盖区地质填图研究。充分提取区域化探资料中的地球化学信息,将研究区识别为具有特定地质、地球化学意义的5个地球化学单元。其中:Be、Nb、Sn、Y、Rb单元主要反映研究区古生代花岗岩和中生代酸碱性火山岩的分布;Co、TFe、Cr、Ni、V、Ti、MgO单元主要反映研究区早元古代侵入岩、变质岩和古生代基性岩体的分布;SiO2、K2O、Na2O单元反映的地质单元主要为古生代侵入岩、中生代酸碱性火山岩和沉积岩;Al2O3、Li、F单元主要反映中生代火山岩的分布;CaO、Sr、Ba单元反映的是中生代沉积岩,可能与生物沉积作用有关,代表比较稳定的沉积环境。同时,根据不同单元的分布形态和边界走向,识别和推断了研究区的北东、北西、南北及东西向断裂构造。     

河南桐柏下黄竹园金矿床地球化学特征研究

下黄竹园金矿是老湾金矿成矿带的重要组成部分,文章通过对地层各组段和主要岩石类型中微量元素地球化学参数特征,以及异常元素空间分布、异常浓度分带、分带序列、元素对比值的研究,表明成矿元素含量变化与地层层序、岩石类型密切相关.龟山岩组二云石英片岩是金矿体的直接赋矿围岩,与斜长角闪片岩共同构成矿源层.根据异常元素组份分带、垂向分带序列和不同标高元素对比值的研究,建立了地球化学评价指标,为矿床深部及外围找矿提供了地球化学依据.     

Semi-hierarchical correspondence cluster analysis and regional geochemical pattern recognition

Semi-hierarchical correspondence cluster analysis (SHCCA), firstly developed in this paper, extracts the main advantages of correspondence analysis, hierarchical and non-hierarchical cluster analysis, and unifies the R- and Q-mode cluster analysis of large data set. A systemic program to recognize the regional geochemical patterns is built up based on this method. With this program, the complex tasks for data interpretation can be achieved by simple processes, and important geochemical information can be displayed by a single diagram, i.e. the multivariate regional geochemical image. As one of the applied examples of this program, the regional geochemical pattern recognition for a shallow covered area around Tahe in Heilongjiang Province is introduced. The results show that many hidden geochemical patterns related to the lithologies, structures, ore-forming conditions and prospecting targets etc are revealed by the geochemical image, and that the main geochemical patterns are related with certain geological and gravitational patterns. By finding contrasts between geochemical patterns and geological or gravitational patterns, the SHCCA results assist the geological mapping in this area. Geochemical data obtained in Chinese regional geochemical exploration provides useful information regarding geology and minerals, and the method described in this paper provides a new way to examine this type of resource.