湘南五盖山地区WSnPbZn多金属矿床成矿特征及找矿远景

对湘南五盖山地区控矿构造系统重新认识,解译五盖山地区剥离断层的形成、变形、改造和成矿的全过程与热液矿床形成的关系,揭示剥离断层对本区W、Sn、Cu、Pb、Zn、Bi、Mo、Au、Ag等金属矿床的控矿作用。     

浙江萧山岩山明矾石矿床成矿特征及其成矿演化探讨

笔者对产于元古界双溪坞群古岛弧火山沉积岩系中的岩山明矾石矿床，经矿床地质、成矿作用与成矿时代、构造与成矿演化等方面的分析研究，认为岩山明矾石矿床系元古代古岛弧火山喷发沉积热液交代成矿。     

湘西北地区铅锌矿床成矿规律及找矿方向

湘西北地区以盛产层控型低温热卤水铅锌矿床著称。矿床赋存于早寒武世晚期至早奥陶世早期分别受台地边缘相、台前斜坡相和局限台地相控制的碳酸盐地层中。矿体主要呈层状、似层状且具多层性,局部可切层,少数呈脉状。其产出受岩石的原生孔隙和容矿层内构造如虚脱—滑动空间、破碎带及裂隙系统等多因素控制。深大断裂带为主要导矿构造。容矿层不是矿源层,铅锌矿不存在同生沉积特征或痕迹。铅同位素年龄晚于赋矿地层年龄。矿质主要来源于碳酸盐建造以下的一大套碎屑岩建造,部分来自深部和造山带。矿床无围岩蚀变则无铅锌矿化,矿化富集强度与多类型围岩蚀变强度及层内构造空间发育程度呈正相关关系。该地区成矿地质条件优越,在划分出的4个找矿远景区内,许多低工作程度区和找矿空白区里仍具有巨大的找矿潜力,可望找到新的矿床。     

建德铜矿床成矿模式的探讨

本文以近代成矿理论方法对建德铜矿床的控矿构造、成矿围岩、成矿物质来源以及成矿模式和成矿时代进行了理论分析，指出建德铜矿床赋存在一向斜构造倾没端，产于中石炭统黄龙组底部灰质白云岩和大理岩化白云岩中，经燕山中一晚期构造—岩浆活动富集成矿，为地层、构造、岩浆岩三位一体的成矿模式；为热液叠加型层控矿床，系燕山中期的产物。     

Geology and geochemistry of Huanggangliang stratabound skarn deposit in Inner Mongolia, China

Over the recent three decades,exploration of a large-size Sn-Fe polymetallic ore deposit at the Huanggangliang, the Da Hinggan Mountains, Inner Mongolia, China, has been largely focused on the premise that the mineralization represents epigenetic magmatic hydrothermal ore deposit in genetic connection with the Mesozoic magmatism. The Huanggangliang Sn-Fe polymetallic ore deposits occurred in Permian strata, with siltstone/marble of the Zhesi Formation and spilite/andesite/tuff of the Dashizhai Formation. The characteristics of geological and geochemical data demonstrated that sedimentary hydrothermal mineralization occurred during the basin evolution at the Permian, rather than representing epigenetic magmatic hydrothermal genesis with the following evidences. The ore-bearing skarns are stratiform with underlying metasedimentary rocks and overlying volcanic sedimentary rocks. Sedimentary hydrothermal textures and structures are observed in the stratabound ore-bearing skarn such as bedded-laminated skarn and magnetite ores with small-size folding or soft deformation, synsedimentary breccia of skarn and magnetite ores and concentric shell structure of magnetite ores. So the stratabound ore-bearing skarns associated with magnetite ore and micro-disseminated tin, are peculiar examples of exhalite. The REE contents of the stratabound ore-bearing skarns display ΣLREE-rich (36.91×10-6) but ΣHREE-depletion (6.42×10-6), with positive Eu anomaly (Eu/ Eu 1.28) and negative Ce anomaly (Ce/Ce 0.88), which is totally different from REE pattern of the Huanggang magmatic rocks(with ΣREE 277.73×10-6, ΣLREE 220.24×10-6, ΣHREE 57.49×10-6, Eu/Eu 0.06, Ce/ Ce 1.52), which is comparable with modern sea-floor hydrothermal fluid,sedimentary hydrothermal ore deposit and associated hydrothermal sedimentary rocks. Calcite samples with δ13CPDB from -5.400 ‰ to -4.397 ‰ and δ18OSMOW from 9.095 ‰ to 9.364 ‰ in the stratabound ore-bearing skarns show sedimentary hydrothermal genesis of the Huanggangliang deposit. This proposition is useful not only for interpretation of the genesis of the Huanggangliang large Sn-Fe polymetallic ore deposit but also significant for mineral exploration in the area especially for finding large deposits caused by sedimentary exhalative mineralization processes.     

贵港-平南地区铅锌铜矿床成因及找矿潜力

文章介绍了广西贵港--平南地区铅锌铜矿矿床地质特征,分析了其成因,认为属沉积--改造型层控矿床.并划出了平垌-锡基坑和四德-官成2个具有进一步找矿潜力的区域.     

漠河县二根河地区地质背景及成矿条件浅析

一、区域地质背景1．区域地层侏罗系在该区分布较广,主要由山间陆相砾岩以及基性、中酸性火山熔岩、碎屑岩组成。依据地层层序、岩石特征、化石组合、同位素年龄等划分为额木尔河组、开库康组、塔木兰沟组。以额木尔河组、塔木兰沟组最发育。     

张家界地区寒武系底部钼、镍多元素富集层含矿岩系特征及成矿条件浅析

本文阐述了张家界地区寒武系底部钼、镍多元素富集层的赋存层位、含矿岩系的层序及各岩性层的特征,并对成矿物质来源、地层、岩相古地理、地球化学等成矿条件进行了探讨。