共查询到19条相似文献,搜索用时 80 毫秒
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冀北地区发现和勘查了大量的银金矿、银铅锌矿、铅锌银矿,其深部是否存在金矿,是一个重大的深部找矿问题。基于幔枝构造成矿物质深部来源的认识,通过稳定同位素、稀有气体同位素、主要载体矿物微量元素及主矿体V-1脉6个中段和V-2脉3个中段1412件基本分析样品银、金的品位变化规律研究,认为万全寺矿区深部很可能演变成金银矿化。此结论可能对张宣幔枝构造外围深部找矿有一定的启示意义。 相似文献
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金蟾山金矿位于位于华北克拉通北缘成矿带中部,赤峰-开原深大断裂与平泉一八里罕大断裂交汇处,喀喇沁变质核杂岩北部,该区金矿点分布密集,金矿床众多,区内还有二道沟、大黑山、黄花沟等近 20 余处金矿床(点),是我国重要的金矿化集中区之一。金矿床主分布与岩浆、断裂构造关系密切,靠近断裂处矿化尤为集中。矿区分东西两条主矿带,矿化带长一般为数千米,宽可达数百米,而矿化带的矿体长一般为数十米至百余米,厚度1~3m左右,矿体多呈脉状、豆荚状、透镜状等。为研究该区深部和外围找矿前景,对该区与成矿关系密切的安家营子岩体及主要构造分析的基础上,结合岩石化学剖面测量、面积性激电测量及可控源音频大地电磁(CSAMT)剖面测量数据资料进行综合分析,从幔枝构造理论出发构建找矿模式,认为矿体深部和外围仍有一定的找矿潜力。 相似文献
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大兴安岭白音诺尔铅锌矿控矿构造研究与找矿预测 总被引:3,自引:1,他引:3
成矿物质来源及控矿因素是矿床学研究的前沿课题。过去人们认为成矿物质主要源于含矿围岩的萃取。因此,找矿重点是寻找矿源层。但是,更多的事实表明,成矿物质主要来自深源,通过地幔热柱多级演化迁移至地壳,并在幔枝构造较好的控矿构造空间聚集成矿。本文探讨了大兴安岭中南段的成矿作用,总结了该区的主要控矿构造,指出了不同级别构造对成矿的控制作用,并预测了不同级别的成矿靶区。 相似文献
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Source of ore-forming material for the Huangtuliang gold deposit,Hebei Province and ore prospecting in the deep periphery 总被引:2,自引:1,他引:2
Shuyin Niu Aiqun Sun Baode Wang Yuchou Han Minghui Wei Hai Zhang Ge Zhang Ping Shi Wenxing Wang 《中国地球化学学报》2008,27(3):225-234
The Huangtuliang gold deposit is characterized by its wide and large ore belt, stable extension and closely spaced orebodies. Unfortunately, no orebody was found by deep drilling. As a result, ore prospecting in this region was once put into dilemma. Detailed analysis of ore-forming and ore-controlling structures in the mining district by the authors has revealed that the ore-forming and ore-controlling structure in this mining district is a steeply dipping (85°-110°/∠70°-85° N-NNE), spade-shaped ductile shear zone, and the ore-controlling structures are a series of nearly erected second-ordered faults which are developed in the upper part of the ductile shear zone, inter-secting with the ductile shear zone. Deep cutting of the ductile shear zone made it possible the ascending of ore fluids from the mantle plume at depth and these ore fluids would migrate upwards along the ductile shear zone under certain temperature and pressure conditions. Along their ascending path, the ore fluids would extract ore-forming elements from the country rocks and the extracted ore-forming elements would be deposited as ores in the hang- ing-wall second-ordered faults. The reason why no orebody was found in early prospecting at depth is that north- ward-dipping drilling in the southern part of the shear zone extended so deeply as to be beneath the shear zone. Only shallow-level orebodies could be found by southward-dipping drilling practice in the northern part of the shear zone. The location where deep-seated orebodies occurred shifted northwards and the orebodies occurred at greater depth. Therefore, it is natural that no orebody could be found when drill core passed through the shear zone. After the ore-forming and ore-controlling structures were well understood, the focus of ore prospecting was placed on the deep-level, northward-penetrating veins. In this way a number of new blind orebodies of great thickness have been found. On the basis of research development in the mining district, a prospecting plan has been made 相似文献
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通过对1:20万水系沉积物测量异常的分析研究,As64号异常有进一步工作价值,用1:5万水系沉积物、1:1万土壤和1:5000岩石测量进行查证,在石英正长班岩体内圈定了矿化带,通过钻探、槽探和坑探揭露,发现含金矿体9条。 相似文献
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石湖金矿101、116矿脉深部延伸稳定,品位有所提高,产状变化不大,南于深部探矿进展较好,而使其成为太行山中段大型金矿.石湖金矿的矿脉明显受断裂构造控制,总体属岩浆期后热液石英脉-断裂构造蚀变岩型矿床.本文采用幔枝构造新视角开展研究,通过对地质背景研究及铅、硫、硅、碳、氢、氧同位素的分析表明:石湖金矿成矿物质主要来源于地球深部,成矿溶液主要为岩浆水,混有部分大气水.进而探讨了其成矿作用,建立了成矿模式,提出了具体找矿建议. 相似文献
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马扎拉金矿位于藏南拆离断裂以北的特提斯喜马拉雅南部隆子逆冲推覆断裂南缘,是扎西康整装勘查区构造蚀变岩型金矿床的典型代表。本文在矿区外围30km2范围开展地质测量工作,重新厘定了矿区及外围的地层系统并新发现大量岩浆岩,重塑了矿区及外围的断裂构造格架并初步厘定了构造活动期次,结合地球物理剖面测量、区域地质新近调查研究成果和少量工程验证,初步构建了矿床的控矿构造几何模型并重新确立了矿区及外围在近东西向具有早期逆冲推覆、晚期伸展滑脱的前断坡和反冲断裂及其次级断裂中寻找构造蚀变岩型金矿的找矿方向,对进一步找矿工作的部署具有重要的指导意义。 相似文献
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冀东华尖金矿床流体包裹体特征与成矿作用研究 总被引:1,自引:1,他引:0
华尖金矿床是冀东地区典型的石英脉型金矿床之一,金主要产在多金属硫化物石英脉中。流体包裹体研究表明,该金矿床各成矿阶段矿石中的流体包裹体主要有3种类型:H2O-CO2包裹体、H2O溶液包裹体和含子晶多相包裹体。成矿早期的流体为H2O-CO2-NaCl体系,均一温度为320℃左右;主成矿阶段的流体为H2O-NaCl体系,均一温度为280℃左右,不混溶作用以及控矿构造由挤压向拉张的转换是金沉淀的主要原因。氢、氧同位素研究表明,华尖金矿床主成矿期流体既有岩浆水又有大气降水参与,成矿晚期流体是以大气降水为主的混合流体。硫、铅同位素示踪表明,该矿床内的金主要来自在深部重熔的太古宙变质岩,成矿物质直接来源为牛心山花岗岩,间接来源于太古宙遵化群变质岩系,成矿过程与下地壳或上地幔物质的演化和改造有关。华尖金矿床的形成与燕山陆内造山作用的伸展期构造及侵入作用有关,岩浆活动带来了稳定的热源和大量的含金流体,随着成矿流体物理化学性质的改变,含金硫化物在张性构造部位沉淀成矿。 相似文献
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金属尾矿具有污染环境和资源再利用的双重特点。从综合利用的角度, 对冀东金厂峪金矿尾矿化学成分、矿物组成, 以及矿物粒度、解离度等进行了测试分析, 以寻求适合该尾矿综合利用的途径。分析结果表明: 金厂峪金矿尾矿属低铁高铝高硅尾矿; 矿物组成以石英和长石为主, 含少量的白云石、云母、方铅矿等矿物; 尾矿粒度以细砂为主; 尾矿中石英含量大于30%, 与其他矿物连生关系简单。综合利用建议: ①制备高纯度二氧化硅; ②制备生产烧结砖等建筑材料; ③制备微晶玻璃、釉面材料等高附加值产品; ④制备环保材料、土壤改良剂、矿物肥料等产品; ⑤作为井下充填材料。 相似文献
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加吾金矿位于青海省东部同德县境内,是武警黄金部队近年来发现的又一处具大型规模的金矿床。该矿床在大地构造位置上处于西秦岭与东昆仑的衔接部位。矿体赋存于中下三叠统中,在平面上呈舒缓波状,在剖面上为脉状、似层状。矿石中金属矿物主要为黄铁矿和毒砂,金主要以微细粒分布于石英裂隙和毒砂、黄铁矿等矿物粒间。区内中下三叠统隆务河群板岩中的金丰度值和有机碳含量高,是有利的赋矿层位。矿体产于北西向和近东西向构造蚀变带内,受区内断裂带控制明显。矿体在空间上与印支期中酸性岩浆岩相伴产出。研究表明,该矿床为受构造蚀变带控制的、与沉积作用和岩浆活动有成因联系的微细浸染型金矿床。截止目前,该矿共计探明金矿脉22条,累计提交金资源量超过20t。该矿的发现和评价对指导青海东部微细浸染型金矿找矿具有重要的示范意义。 相似文献
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Comparison between the Xishimen gold deposit and the Shihu gold deposit in western Hebei and analysis of the potential for ore exploration 总被引:1,自引:1,他引:0
Chao Chen Shuyin Niu Zili Wang Zhong Guo Aiqun Sun Baode Wang Yincang Gao 《中国地球化学学报》2011,30(3):281-289
The Xishimen gold deposit is located in the tectonic zone southeast to the Shihu gold deposit, both of which belong to the same orefield. Then, how is the prospecting potential for the Xishimen gold deposit? A com-parison was made between the Xishimen gold deposit and the Shihu gold deposit on the basis of their geological background of metallogenesis, geological characteristics of the ore deposits, the sources of ore-forming materials, etc. The results showed that both the deposits possess many similarities in the respects mentioned above. And their met-allogeneses can be compared. Therefore, there is great potential for ore prospection in the periphery or at the deep levels of the Xishimen gold deposit. Ore exploration should be well programmed on the basis of a better dissection of the tectonic setting of the orefield. A breakthrough in ore prospection of the Xishimen gold deposit will be of great instructive significance in regionally geological prospecting. 相似文献