不透明矿物所含单个低盐度流体包裹体液相组分SAM/AES实验研究:Ⅰ.原理与方法

针对与矿石矿物共存透明脉石矿物所含流体包裹体并不完全代表成矿流体，红外显微技术及EPMA、SEM等常规表面分析手段无法满足不透明矿石矿物所含单个低盐度流体包裹体研究的实际困难，本文首次成功地应用具同步扫描成象功能、电子束斑空间分辨率较高、信噪比较好的PHI595SAM／AES这一当代高灵敏表面分析技术，按单矿物分选→二次去离子水反复超声清洗→外真空热爆→在金属铟片上压制成样的实验流程对新疆阿尔泰多拉纳萨依金矿床含金黄铁矿所含单个低盐度流体包裹体的液相组成进行了静态定点分析，实验取得了满意结果。     

5－（4－羧基苯偶氮）－8－（对甲苯磺酰氨基）－喹啉与金显色反应研究及应用

以８－氨基喹啉为母体，合成了新试剂５－（４－羧基苯偶氮）－８－（对甲苯磺酰氨基）－喹啉（ＣＰＴＳＱ），研究了它与Ａｕ的显色反应，在ＣＴＭＡＢ存在下，于ｐＨ１０～１３的ＮａＯＨ介质中，ＣＰＴＳＱ与Ａｕ形成２：１紫蓝色络合物，最大吸收峰位于６１０ｎｍ，摩尔吸光系数１．０×ｌ０５Ｌ·ｍｏｌ－１·ｃｍ－１，Ａｕ含量在０～１．２ｍｇ／Ｌ内符合比尔定律。方法选择性好，灵敏度高，操作简便，已用于金矿石样品中Ａｕ的测定，结果满意。     

华南（东）变质基底特征、古构造型式及铀、金矿化远景

华南（东）变质基底由杨子及华夏两块不同特征的地质体组成，中元古代之后，该地区分别经过了碰撞对接、拉开、再拼贴的演化过程。碰撞对接带和在古裂谷系基础上成型的陆内推覆及平移、剪切型拼贴带构成了本区基底构造主要型式。铀及金矿远景与基底特征关系密切，铀矿主要产于基底裂隆带部位，金则主要产于裂凹（裂陷）带部位。古基底构造交叉部位是中新生代构造活动活跃部位，受其控制的早期横向火山裂谷盆地，在晚期拉张条件下形成的岩浆杂岩带是铀、金、多金属成矿最佳远景区。     

无锡、常州郊区发生地裂缝

无锡、常州郊区发生地裂缝近年来，无锡石塘湾西蔡一秦村～带、常州横林分别出现了地裂缝，其中以钱桥毛村园最为严重，该处地裂缝于１９９１年夏初步形成，随后不断扩大，目前已具一定规模，长约７００ｍ，总体宽约６０ｍ，呈近东西向分布，并造成附近数十间楼房产生大量...     

Characteristics and origin of sediment-hosted disseminated gold deposits: a review

Sediment-hosted disseminated gold (SHDG) deposits comprise a major portion of the gold production and reserves in the US. Although presently known to be common only in western North America, SHDG deposits are a significant source of world gold production. These deposits are characterized by extremely fine-grained disseminated gold, hosted primarily by arsenian pyrite. Other metals show very little enrichment although in addition to As, anomalous concentrations of elements such as Sb, Hg, Tl and Ba are utilized as exploration tools. The host rocks are dominantly silty carbonates, but ore concentrations are also present in siliceous and silicified rocks as well as intrusive rocks. Alteration consists of decarbonatization, silicification (jasperoid formation) and argillization, which are arranged both spatially and temporally in that order. Argillic alteration is zoned from kaolinite-dominated cores to sericite-dominated margins. The deposits commonly exhibit significant structural (faults) and stratigraphic (composition/permeability) controls. Until the last few years, SHDG deposits were considered as near-surface, epithermal type deposits in origin. Because of their fine-grained nature and the lack of macroscopic features such as veins, it has proven quite difficult to extract geochemical data that are clearly related to their genesis. However, fluid inclusion data indicate pressures corresponding to depths of 2–4 km under lithostatic conditions. Temperatures are constrained by fluid inclusions and phase equilibria to near 225°C. Stable isotope data from alteration minerals and fluid inclusions indicate that the ore fluids were dominated by meteoric waters, some of which had clearly exchanged oxygen with wallrocks during their passage through the crust. Although the data vary, most ore fluids probably had δD values near −150‰ and δ¹⁸O values ranging from −10 to +5‰. Sulfur isotope values reported from SHDG deposits span a wide range, from −30 to +20‰ (sulfides) and 0 to >45‰ (sulfates). Ore-related sulfides (pyrite, realgar) fall at the upper end of the range reported for sulfides. The alteration and mineral assemblage indicate the ore fluids were probably near neutral and gold was likely carried as a bisulfide complex. The depositional mechanism(s) probably included mixing, cooling and oxidation. These mechanisms are consistent with the observed alteration features, i.e. quartz precipitation, calcite dissolution and sericite-kaolinite coexistence. It also explains the presence of both siliceous ores containing native Au and sulfide ores containing Au in pyrite. The extreme variations in sulfur isotopes as seen at Post and fluid inclusion data from Carlin may be indicative of some phase separation (‘boiling’), but such relations have not been documented in other deposits and the importance of phase separation to gold deposition appears minimal.     

构造岩浆活化与秦岭金矿床

本文论述了秦岭区构造岩浆活化作用与金矿床形成及演化的关系。作者将秦岭区金矿床分为五类，即；①岩浆活化矿床；②岩浆－构造活化矿床；③构造－岩浆活化矿床；④构造活化矿床；⑤构造－变质活化矿床。     

新疆布尔克斯岱金矿床含金矿物标型特征及其地质意义

对布尔克斯岱金矿床的主要含金矿物采用多种测试手段进行研究：如重砂、化学分析、Ｘ射线衍射分析、电子探针、ＥＰＲ谱、数学地质和包裹体分析等。对矿物特征及其与金矿化的关系作了较详细的研究。对确定矿床成因、找矿标志和成矿预测有一定意义。为矿床外围和深部找矿提供了依据。     

黄铁矿表面及其与Au（HS）2^—溶液作用的STM研究

本文用ＳＴＭ研究了黄铁矿和方铅矿表面的原子结构、纳米级微形貌、电子态分布及其吸附态的特点。ＳＴＭ电流图象揭示了表面缺陷与表面电子态之间的对应关系，硫化和的表面的化学反应活性可能是表现缺陷引起的局域导电性增强有关。ＳＴＭ观察进一步表明黄铁矿和方铅矿对金的硫氢配合物的吸附作用优先发生于扭折位和台阶边缘等高能部位，反映出吸附态的分布也是与表面电子态分布相对应的。这样就从微观领域考证了硫化物表面对化学活性     

Genetic Analogy Between Sediment—Hosted Gold Deposits and Sediment—Hosted Copper Deposits in Southwest China

The sediment-hosted copper deposits according to the authors‘ study were formed from connate formation water during the post-sedimentary or diagenetic stage while the sediment-hosted disseminated gold deposits are unanimously considered to be of post-sedimentary hydrothermal origin.Therefore,apart from their own individulities.These two types of deposits must share some characters in common.Comparisons are attempted,in this paper,between the sediment-hosted copper deposits in southwest China and the Triassic sediment-hosted disseminated gold deposits in the Yunnan-Guizhou-Guangxi Triangle in terms of geological and geochemical features.     

南秦岭沉积岩型金矿成矿潜力与找矿前景分析

南秦岭沉积岩区广泛分布于商丹缝合带与勉略缝合带间的秦岭地块中，并以上古生界泥盆系最为发育。该含矿与岩矿建造中产出多种类型的浸染状金矿床，具有一定的空间分布规律。本文根据各金矿类型地质特征、岩矿与含矿岩系组成、所在区地质背景等方面，分析了它们的成矿潜力和找矿前景。