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青海省矿产资源发育特征概述 总被引：5，自引：0，他引：5
通过对青海省矿产资源发育特征的系统研究,发现青海省矿产资源丰富,种类齐全.截止2007年底,共发现各类矿产132种,其中探明有资源储量的矿产为107种;发现各类矿床、矿(化)点3 921处,其中重要矿产大型以上有矿床96处,中型123处,小型211处;矿床类型复杂多样,主要有岩浆型、斑岩型、伟晶岩型、接触交代(矽卡岩)型、热液型、海相火山岩型、变质型、沉积型(喷气沉积型)、砂矿型、风化壳型、盐湖型、火山沉积型、构造蚀变岩(造山)型、陆相火山岩型等14种类型;资源查明率低,其中,煤13.07%、铁16.65%、铜14.24%、铅15.35%、锌17.87%,岩金3.64%.由此可知,青海省主要优势与战略性矿产资源的进一步找矿空间和潜力是十分巨大的. 相似文献
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介绍了江口式铁矿矿床特征及沉积岩相古地理特点，铁、锰、磷等矿产的沉积成矿序列，认为该类铁矿属条带状铁硅质建造，与前寒武纪苏必利尔湖型铁矿有一定相似性。矿床分布范围广，资源潜力大，建议加强勘查开发。 相似文献
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湖南省主要稀有稀土金属矿床特征 总被引：1，自引：0，他引：1
湖南省主要有铌、钽、铷、铯、锂、铍、锆等稀有金属及稀土金属矿床.矿床类型以岩浆晚期分异交代型、气成热液型、伟晶岩型、风化壳型和砂矿型为主.稀有稀土金属矿床在空间分布与成因上,与燕山期花岗岩体密切相关,往往具有水平分带和垂向分带规律. 相似文献
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伟晶岩型矿床是世界上重要的稀有金属矿床类型之一，也是当前国际矿床学研究热点之一。近年来该类稀有金属矿床在分类、成矿流体及成矿物质来源、伟晶岩成岩方式和稀有金属富集机制等方面的研究取得了一些重要进展。伟晶岩通常与母质岩浆具有密切的时空关系，但不少也与母质岩浆无成因关系。伟晶岩稀有金属矿床成矿熔体/流体具有低黏度、富水、高分散性、富碱等性质，可导致P、F和B等元素在伟晶岩中的极端富集，使其与稀有金属组成各类络合物或化合物而迁移与富集。富含Li-Cs-Ta(LCT)型伟晶岩与S型花岗岩关系紧密，成矿物质主要起源于黑色页岩等海相沉积物质，而富含Nb-Y-F(NYF)型伟晶岩常与A型花岗岩联系紧密，属同源岩浆演化和矿化。花岗质岩浆分异结晶和地壳或地幔岩石的部分熔融是伟晶岩两种主要的形成方式。流体不混溶作用、富助熔组分花岗岩浆高度结晶分异和热液交代作用3种富集机制可用于解释伟晶岩型稀有金属矿床的形成。 相似文献
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广西桂平四德-平南官成大型铅锌矿床属于热水沉积改造型层控矿床。通过分析该矿床成因及其层、相、位的共同控矿规律,建立了“地层、沉积相、构造定位、工程验证”的矿床找矿模式,该找矿模式在矿产勘查工作中可借鉴。 相似文献
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隗合明 《地球科学与环境学报》1988,(4)
本矿床的矿石组构类型可概括为四类:同生沉积组构、成岩组构、后生叠加组构和后期变形改造组构。详细研究表明,以同生沉积和成岩作用形成的组构为主,如浸染状、层纹状、条带状、角砾状构造和莓球状、半自形细粒状结构等,其中部分受到后期构造变形改造、但后生成矿组构极为少见。矿床的地球化学特征研究提供了成矿物质来源于深部地层的信息。因此,从矿石组构特征及成矿物质来源两个方面分析,认为本矿床为海底喷流沉积—成岩弱改造型层控矿床. 相似文献
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The Qilishan gold deposit is located in the southern Zhaolai gold ore belt in the northwestern Jiaodong region.A total of seven gold ore bodies have been found in the mining area.Linglong gneissic biotite granite and the NE trending Lingbei fracture control the output and distribution of the gold deposit.The ore bodies with veined or irregular shape occur in the structural alteration zone.The ore bodies of different sizes are NE trending and SE dipping.The constituent minerals of the ores mainly include pyrite,chalcopyrite,native gold,electrum,argentite,matildite,hematite,quartz and calcite.The ores are characterized by metasomatic dissolution structure,as well as veined and brecciated structures.The ore-forming process is divided into four stages,namely quartz-,pyrite-,polymetallic-and carbonate stages.Study on fluid inclusion shows that the deposit is composed of gas-liquid two-phase inclusions （Ⅰ） and three-phase inclusions containing CO2 （Ⅱ）,and that the former dominates.The homogenization temperature is 259.6℃-373.7℃ ; the salinity of three-phase inclusions containing CO2is 5.77%-9.84% （NaCl） ; the salinity of gas-liquid two-phase inclusions is 6.58%-8.54% （NaCl） ; and the estimated ore-forming pressure is 55.2-82.2 MPa.According to the nonlinear relationship between the depth and pressure of the fluid in the fracture zone,the ore-forming depth of the Qilishan gold deposit is calculated as 5.95-7.14 km.It is preliminarily determined that the deposit is a mesophilic and hypothermal gold deposit. 相似文献
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义县金矿是我国新发现的一个金矿床,矿床规模较大,品位高,矿石成分简单,易采易选。矿床受地层、断裂、岩脉活动等因素影响,并有多源特证。 相似文献
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建昌县大石沟金矿床与南大线金矿床相连,二者实为一个金矿床。矿床受控于大青山火山机构,在火山机构的南侧接触带及其附近的中侏罗统髫髻山组安山质火山岩中热液蚀变发育。蚀变有两种类型,即面性围岩蚀变和线性围岩蚀变,面性蚀变岩受接触带控制,线性蚀变岩受断裂构造或劈理（带）控制,前者控制了金矿床或矿化带,后者控制了金矿脉（带）,这种控矿断裂或劈理（带）是大青山火山机构破火山口塌陷过程中形成的裂隙系统。依据矿床产出的地质背景、构造环境、矿床地质特征、地球化学特征等建立了矿床模式,以利于今后的成矿预测和资源评价。 相似文献
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Wei Min 《世界地质(英文版)》2001,4(1)
The gold - silver complex ore field of Qingchengzi is located in Liaohe group of Liaodong rift. The gold - silver ore bodies mainly lie in Dashiqiao group and Gaixian group, which provides ore - forming materials for the mineralization. For taking place multi - period and multi - stage magmatic activities, the ore - forming materials in the formation had had dynamothermal metamorphism for a long time and enriched and formed ore bodies after magmatism in Indo- Chinese and Yanshan epoch. The ore bodies are controlled by stratigraphic formation and stored in the interformational faults and schistosity belts. Silicalite is the most important indicator for searching them. Although the Pb - Zn and the gold - silver deposits are the same series of mineralized products, their positions are different, resulting from the differences of elements nature and mineralized conditions. The gold silver deposits belong to strata - bound and hysterogenetic mesothermal - epithermal deposit. 相似文献
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Shangzhuang gold deposit located in the Wangershan fault zone of northwestern Jiaodong is of meso-hypogenic altered rock type. The ore bodies occur at the hanging wall and footwall of Wangershan fault in vein or irregular shapes with the NE strike, NW trend, 30°-60° in dip and the lateral trending of SW. The ores are composed of pyrite, quartz, sericite, bismuthinite, native gold, bismuth sulfosalt minerals, chalcopyrite, etc., shown as brecciated structure and vein structure with metasomatic dissolution textures. The wall rock alteration is mainly described as phyllic alteration and silicification. The mineralization of this deposit is controlled by structure and altered rocks. The ore-controlling fault structures of this deposit is Wangershan fault, of which the intersection of major fault and secondary fault is the main ore-bearing position of this gold deposit, and the larger arc curved position is a favorable part for ore body occurrence. On the plane, the ore body is shown as equidistant pinch-out reproduction. 相似文献
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The Qingchengzi ore field that is located inLiaohe group of Liaodong rift. It is an importantnonferrous metal and precious metal baie. Manygold -- silver deposits have been found in recentyears, such as Taoyuan, Gaojiaj>uzi, Xiaotongjiapuzi.For searching … 相似文献