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分析了旧店矿区的各项地质特征,根据规模、蚀变、细脉标志等特征对1号脉的支脉提出了勘探建议,并对圈定矿体作了详细阐述,认为该支脉与1号脉同期形成并略显张性,上覆1号脉与支脉二者之间的细脉对该支脉的成矿起了重要作用。 相似文献
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Xujun LI Zhenyan LUO Xue CHEN College of Earth Sciences Jilin University Changchun China 《东北亚地学研究》2008,(3)
The gold deposits in the Jiudian gold field in the southwestern part of the Jiaodong terrane are much similar, but less attention-paid ones than those in the northwest part of the same terrane. The ore-controlling faults in the Jiudian gold field could be classified into three types: fluid transporting; fluid dispatching and fluid precipitating. The fluid precipitating faults are usually small and low-order ones, and could be fatherly classified into three types based on their orientation: NE-, NNE-and NW o... 相似文献
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Xujun LI Zhenyan LUO Xue CHEN 《东北亚地学研究》2008,11(3):135-144
The gold deposits in the Jiudian gold field in the southwestern part of the Jiaodong terrane are much similar, but less attention-paid ones than those in the northwest part of the same terrane. The ore-controlling faults in the Jiudian gold field could be classified into three types ： fluid transporting ; fluid dispatching and fluid precipitating. The fluid precipitating faults are usually small and low-order ones, and could be fatherly classified into three types based on their orientation： NE-, NNE- and NW oriented, and they are of quite different features. The Jiudian gold field can be divided into three sectors based on the distance from the major fault zone-The Zhaoping fault zone. The present paper mainly deals with the features of these differently oriented orecontrolling faults and of sectors and presents a tentative structural model for them. 相似文献
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平度旧店金矿床位于华北板块之胶北隆起区内,其赋矿围岩为晚侏罗世玲珑花岗岩,矿床成因为岩浆期后热液裂隙充填石英脉型金矿。据成矿物质沉淀时序可分为Ⅰ黄铁矿化-绢英岩化、Ⅱ石英-磁黄铁矿-中粗粒黄铁矿、Ⅲ石英-黄铁矿-微细粒黄铁矿、Ⅳ石英-多金属硫化物和Ⅴ石英-碳酸盐岩等5个成矿阶段,其中Ⅱ,Ⅲ,Ⅳ阶段为金的主要富集成矿阶段。该文在对山东平度旧店金矿床中黄铁矿和石英矿物标型特征研究的基础上,根据成矿阶段,划分出5个时代的黄铁矿,即形成于黄铁绢英岩中的Ⅰ阶段黄铁矿、黄铁矿石英脉中的Ⅱ阶段黄铁矿、石英黄铁矿矿石中的Ⅲ阶段黄铁矿、多金属硫化物矿石中的Ⅳ阶段黄铁矿和产于石英碳酸岩细脉中的Ⅴ阶段黄铁矿。黄铁矿晶形主要为{100},{210},{111}单晶形态,{100}+{210},{100}+{111}和{100}+{210}+{111}的聚形晶态,随着成矿阶段的变化,立方体出现率逐渐减小,五角十二面体、立方体+五角十二面体的聚形晶出现率则逐渐增加,直至晚期成矿阶段又有出现率高的立方体黄铁矿。旧店金矿在石英黄铁矿成矿阶段(Ⅲ阶段)中黄铁矿晶形以{100}+{210}为主,在多金属硫化物成矿阶段(Ⅳ阶段)中,黄铁矿晶形以{100}+{111}和{100}+{210}+{111}聚形为主,而在早期阶段和晚期阶段,黄铁矿晶形简单,以{100},{210},{111}单晶为主。对黄铁矿主成分的研究表明,成矿阶段黄铁矿表现为早期亏S、富Fe的特点,在主成矿阶段Ⅲ,Ⅳ阶段中,黄铁矿则表现富S、亏Fe的特点,反映了在多金属硫化物成矿阶段,不仅是金大量沉淀形成的时期,也是载金矿物黄铁矿快速富集沉淀的时期,说明富S、亏Fe的地球化学环境有利于金的沉淀。黄铁矿物理特征及石英标型亦佐证了在多金属硫化物阶段的黄铁矿、石英晶胞参数稍高,说明同波谱段反射率和晶胞参数的变化与金含量有对应关系。 相似文献
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本文通过对甘肃省九甸峡水利枢纽２０＃滑坡的研究,评价了滑坡的稳定笥及对建筑物的危害性,提出了治理对策。 相似文献
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The gold deposits in the Jiudian gold field in the southwestern part of the Jiaodong terrane are much similar, but less attention-paid ones than those in the northwest part of the same terrane. The ore-controlling faults in the Jiudian gold field could be classified into three types: fluid transporting; fluid dispatching and fluid precipitating. The fluid precipitating faults are usually small and low-order ones, and could be fatherly classified into three types based on their orientation: NE-, NNE-and NW oriented, and they are of quite different features. The Jiudian gold field can be divided into three sectors based on the distance from the major fault zone-The Zhaoping fault zone. The present paper mainly deals with the features of these differently oriented ore-controlling faults and of sectors and presents a tentative structural model for them. 相似文献
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1#脉为旧店金矿内最大的一条含金石英脉。在总结1#脉矿脉地质地球化学特征、矿化富集规律及其找矿标志等基础上,预测了其深部隐伏矿体。1#脉受长＞ 6 000 m、平均宽＞ 3 m 的北东向断裂构造控制,矿化类型以石英脉型为主。金矿体主要分布在控矿断裂构造宽大部位和在趋向上和倾向上发生明显变化的部位,金矿体群主要分布在煌斑岩和闪长玢岩等脉岩集中分布部位。控矿断裂宽厚,强硅化和强绢英岩化并存,网脉状和细脉状石英脉发育以及闪长玢岩和煌斑岩类出现为矿脉深部出现隐伏矿体的地质标志。根据矿脉中1 000 多个地球化学原生晕样品研究结果,矿脉中As、Sb、Hg 元素组合异常属矿上晕异常,其强异常地段和强异常样品出现指示深部隐伏矿体。根据这些地质和地球化学找矿标志,在1#脉深部预测出4 个隐伏矿体靶区,现已对其中两个靶区进行了坑道工程验证。 相似文献
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旧店金矿田位于招平断裂南端,矿田内矿床均受旧店帚状构造控制,分析该帚状构造特征认为,其主要受3期不同作用力叠加而成：侏罗纪晚期—早白垩纪早期（160～125 Ma）,受太平洋板块向欧亚板块的NW向覆冲作用力,是平面具左旋特征的帚状构造主形成阶段;白垩纪中期（125～100 Ma）,郯庐断裂的伸展与燕山期地幔热柱强力侵位作用造成了剖面上的帚状构造;白垩纪晚期（100～80 Ma）,郯庐断裂全面拉伸对前期各构造改造阶段。该帚状构造内的NNE向东倾的压扭性构造为主要控矿构造,经主要矿床的深部验证证实,此类构造深部赋存较好的隐伏金矿体。 相似文献
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