成矿远景评价
发布网友
发布时间：2022-05-17 22:53
共1个回答
热心网友
时间：2023-11-13 13:20
一、金青顶金矿
金青顶为一低缓丘陵区，赋矿断裂切割于昆嵛山花岗岩中，为橄榄辉绿玢岩脉所充填，赋矿部位恰处于将军石断裂向NE拐折段，红化带十分发育，绢英岩带狭窄，矿体为两期八个阶段成矿物质所叠加，富矿阶段石英、黄铁矿含量高分布广，具有大矿应有的地貌、地质和找矿矿物学标志。
从剥蚀程度来看，—770m以上，石英包体H2O含量高于900×10-6，黄铁矿杂质以中带元素Bi及Au、Cu、Pb为主，矿体剥蚀浅，深部远景大。
从矿物标型与金品位的关系及其在空间上的变化规律（各项标型填图结果）来看，—700m以下21线附近，可ek能出现第四富矿段。
从矿物标型特征值区和富矿段的侧伏来看，各富矿段SW下方和NE上方宜加强控制。
从矿物标型特征值区重现规律来看，矿体下部NE方向的侧伏角可能变缓。
另外，断裂在—700m以下可能向NNW反倾，为有利部位。
二、双山子金矿
双山子也处于丘陵区，矿体位于将军石断裂NNE正常延伸地段，红化带比较发育，但绢英岩特别是黄铁绢英岩带比较宽广，—50m中段局部宽度可达50m以上，主成矿脉体不太发育。因此，双山子矿区不具形成大矿的最佳条件。但—90m以下，绢英岩带变窄，有可能出现较富地段。
对—50m中段50—58线间盲付井处小矿体10件样品和—90m中段54—61线西侧黄铁矿石英脉 28件样品测定黄铁矿a值 990个。—50m中段P/（P+N)=50%，aP=258μV/℃，—90m中段P/（P+N)＝60%，aP=264μV/℃。黄铁矿的该二特征值尤其P/（P+N）较低说明其成矿热液性质在所研究的地段不利于形成富矿。其深部预测尚需进一步工作。
三、三甲金矿
三甲金矿位处低山区，断裂走向与将军石断裂*行，切割于昆嵛山岩体中，赋矿部位向NNW拐折，优势倾向NE，沿走向和倾向均有“S”型弯曲。红化较发育，绢英岩带1—3m，两期主成矿阶段叠加明显，具有形成大型矿床的条件。该处断裂向NE缓倾部位利于形成富矿。
四、其他金矿
福禄地、胡家口、育林山等金矿均处在NNE向断裂正常延伸地段，育林山段拐折频繁，从构造上看容易形成小型矿囊，如果其他条件较好，也能形成一定规模。
胡八庄金矿位于断裂拐折段。断裂分枝较多，深部岩性均一时可能复合，出现大脉。
五、区域成矿远景
牟乳成矿带胶东群与荆山群并存，二者金丰度高于招掖成矿带，可为金的成矿提供物质来源和活化剂。昆嵛山岩体富Si，有利于石英脉的形成；富碱、S、CO2，且黑云母形成时富O2，有利于围岩蚀变和金的迁移；富Au、Ag、Ba且变化幅度大，说明金已有一定程度的富集，是重晶石矿、黄铁矿型硫铁矿、尤其是富硫化物高品位石英脉型金矿成矿的有利地质体。本区NNE向断裂陡立，成矿前有镁铁质－超镁铁质脉岩和深源包体充填，说明切割很深，有利于大型石英脉型金矿的发育。本区金矿成矿作用普遍有两期多阶段叠加，晚期的构造－热液活动强度与早期相当。因此，与招掖带相比，牟乳带具有十分有利的地层、构造、岩浆岩和成矿条件，其金矿成矿潜力远未得到开发，大力加强本区金矿地质研究和勘查，可望在黄金储、产量方面取得重大突破。
Genetic Mineralogy of RuShan Gold Field, Jiaodon ,China
Li Shengrong ChenGuangyuan ShaoWei SunDaisheng
Abstract
Muping-Rushan metallogenic zone,dealt with in the present monograph and located in the eastern part of Jiaodong area,the capital of gold in China,has been ex loited for old earlier than Zhaoyuan zone,the western part of Jiaodon ,Unfortunately,the former had lagon behand in this aspect the latter since 1949.On the basis of investigation on old ex-oration history of Shandong province and old metallogenic laws,Professor Chenguangyuan pointed out that both of Muping-Rushan zone and Zhaoyuan zone bear excellent gold metallogenic condition,much more work should be down for the development of gold resources in Muping-Rushan region.This monograph is part of the fulfilment of the scientific research group headed by Professor Chen.The authors concted a broad investigation on the gold metallogenic ground in Muping-Rushan region and paid more attention to the characteristics of genetic mineralogy and prospecting nineralogy of Rushan gold field,one of the most important fields of the region,and the gold forming potential of Kunyushan adamellite,which acted as the wallrock of most deposits here.
The monograph contains 8 chapters.
In chapter 1,the author analyses the action of stratigraphy,igneous rocks especially Kunyushan adanellite and regional structure in the forning or gold ore.It is recognized that the metamorphic strata,the rchaean Jiaodong group and the Proterozoic Jingshan group made contribution for gold mineralization in different ways.Rocks of the Jiaodong group,characteristixally the metamorphic equivalent of basic intrusive and volcanic rocks,released element Au ring its remelting course.Rocks of the migration and concentration of Au.Their richness in Fe is partial reason for the Fe richness in gold ore here.
Chapter 2 gives a broad view on the geology of Rushan gold field with special e phases on wallrock alteration and metallogenic stages.It is known that there are two kinds of altered rocks,redised biotitebearing adamellite and beresite.The former represents migration zone of ore materials and the latter is a zone where ore materials started to sediment.The development of them, therefore, bears much significance to the forming of ore deposits.The authors points out that an excessively broad(pyrite-)beresite zone might lead to dispersion of ore materials.With regard to the metallogenic process,the authors recognized two periods including eight stages.The first period is characterized by quartz-pyrite-siderite association and the second is characterized by secularite-cal-cite ol association.The supraposition of two periods of ore materials is a very profitable phenomenon.
Chapter 3 makes detailed studies on the genetic mineralogy and prospecting mineralogy of K-feldspar,plagioclase and mica in the wallrock of Rushan gold deposits,Kunyushan adamellite and related altered rocks and some other intermediate-acid intrusion.The following major information are drew out:
1.Kunyushan adamell te belongs to I-type magnetite series with few S-type features.showing its inherited characters from the rocks of Jiaodong Group.
2.Kunyushan adamellite is rich in gold,silver and barium and poor in poly matals.It is profitable to the forming of gold and barite ores.
y3.The studg kinds of minerals in altered zonesof the three ives evidences for the ore material contributiin of wallrock to the deposits here.4.Some prospecting criteria are worked out.Chapters 4,5,6 study genetic mineralo y and prospecting mineralogy of quartz,p yrite and gold minerals in Rushan gold field.Ten mineralogical maps reveals equal-distance distribution of rich ore sectors,the migration direction of auriferrous hydrothermal fluid,the denudation of the deposits,the connection of the ore-materials to Jiaodong Group and Jingshan Group.It is concluded that,the deposit in Jinqingding,one of the largest in Rusha hgold field is a middle-low temperature deposit with shallow denudation.The fourth ric sector is predicted,and a lot of mineralogical criteria for gold prospecting are brought out.
On the basis of mineralogical studies,refering to other data,the authors discuss the genesis of the deposits in chapter 7 and works out a metallogenic model.
Chapter 8 summrizes gold prospecting criteria and brings up the authors′view on the prospect of Rushan gold deposits,Shanjia gold deposit and Muping-Rushan rengion
