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1.
Gold Headquarter of the CAPF has discovered the Yangshan super large-scale gold deposit in Gansu Province, which is a great breakthrough of gold exploration and prospecting in Western Qinling Mountains of China. The gold resources of this deposit achieved 308 tons with increasing potentials. Preliminary geological investigations indicate that the Yangshan gold deposit is located in the intra-continental collision orogenic belt; and the deposit was formed during the continent-continent collision orogenic processes. The geological characteristics of the deposit are similar to that of the typical Carlin-type gold deposits, while differences still exist. The ore-forming background is notably different from the Carlin gold deposit province in the United States; and the ore-forming fluids are similar with that of the orogenic-type gold deposit. Accordingly, the Yangshan gold deposit is a transitional type between the Carlin-type and the orogenic type gold deposits. At present, the Yangshan gold deposit is the largest Carlin and Carlin-like type gold deposit that is ever discovered in China. Researches on metallogeny, metallogenic model and ore-enrichment regularities of the Yangshan gold deposit are crucial to meet the pressing needs of the current geological investigation and ore exploration of the deposit. 相似文献
2.
Gold Headquarter of the CAPF has discovered the Yangshan super large-scale gold depositin Gansu Province, which is a great breakthrough of gold exploration and prospecting in WesternQiniing Mountains of China. The gold resources of this deposit achieved 308 tons with increasingpotentials. Preliminary geological investigations indicate that the Yangshan gold deposit is located inthe intra-continental collision orogenic belt; and the deposit was formed during the continent-continentcollision orogenic processes. The geological characteristics of the deposit are similar to that of thetypical Carlin-type gold deposits, while differences still exist. The ore-forming background is notablydifferent from the Carlin gold deposit province in the United States; and the ore-forming fluids aresimilar with that of the orogenic-type gold deposit. Accordingly, the Yangshan gold deposit is atransitional type between the Carlin-type and the orogenic type gold deposits. At present, the Yangshangold deposit is the largest Carlin and Carlin-like type gold deposit that is ever discovered in China.Researches on metaliogeny, metaliogenic model and ore-enrichment regularities of the Yangshan golddeposit are crucial to meet the pressing needs of the current geological investigation and oreexploration of the deposit. 相似文献
3.
Please refer to the attachment(s) for more details. 相似文献
4.
明代学者陈献章说过:"学贵有疑". 读完《贵州地质》2007年1期,"浊积岩型金矿简介"一文以后,脑海中充满疑问.首先感到"简介"一文的结构比较特别.按常理,写完前4节,已完成"简介"任务,第5节似属多余. 相似文献
5.
平江万古金矿床地球化学研究 总被引：15，自引：0，他引：15
平江万古金矿床，成矿物质来源于容矿地层中元古界冷家溪群坪原组，矿床继承了容矿地层富Ａｓ、Ｓｂ、Ｗ等微量元素的特点，成矿流体为与区域浅变质作用有关的ＨＣＯ＿３－－Ｃｌ－－Ｎａ￣＋－Ｃａ￣（２＋）型建造水热液，成矿过程中Ａｕ主要以ＡｕＡｓＳ＿２、ＡｕＡｓＳ＿３￣（２－）络合物形式迁移，矿床形成于中一低温，弱碱性、还原环境。 相似文献
6.
云南属于矿产资源大省，矿业开发历史悠入，可追溯到公元前十二世纪的商代，至今已有3000多年，积累了非常丰富的经验和资料，现代科学技术极大地促进地质勘查和矿业开发的发展，但由于云南地质构造复杂，山高谷深，人烟稀少，不乏存在找矿盲区，因此，在使用高新科技手段勘查找矿的同时，“以史为证，以史为鉴”，挖掘历史记载中有用的矿业信息，仍不失为发展矿业，特别是发展地方矿业的途径。本刊将陆续发表薛步高多年来搜集，积累，考证的找矿史料，以期以新一代矿业开发提供信息，发挥作用。 相似文献
7.
穆龙套金矿地质和地球化学 总被引：2，自引：0，他引：2
总结了世界最大造山型金矿穆龙套金矿（黄金储量〉6100t）的地质、地球化学特征。穆龙套金矿的赋矿围岩为晚奥陶世早志留世黑色碳质页岩,矿床产于剪切带和断裂的交汇部位,受韧性剪切带控制。下部有强烈蚀变的白岗岩（约287Ma）,矿体北部‘出露火成岩岩墙（273～286Ma）。金主要赋存于石英脉中,矿石及其围岩蚀变组合的地球化学特征指示了岩浆流体对成矿作用的贡献,但流体包裹体研究表明,成矿流体中绝大多数He来自地壳,惰性气体主要来自大气。金矿年龄被确定为约275Ma（SmNd等时线）、226～254Ma（绢云母40Ar／39Ar坪年龄）和约290Ma（毒砂Re-Os）。在有限的地区内短时期形成巨型金矿需要特殊的机制和长期的流体演化过程。 相似文献
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Puziwan Gold Deposit in Shanxi, China: A Special Linear Cryptoexplosive Breccia Type Gold Deposit 总被引：1，自引：0，他引：1
YAN Fengzeng Gold Headquarters State Economic Trade Commission P.O. Box: Beijing 《《地质学报》英文版》2000,74(3)
The Puziwan gold deposit is a special linear cryptoexplosive breccia type deposit found in northeastern Shanxi, China, in recent years. The deposit is located in a secondary metallogenic. belt of the most famous Au-Ag polymetallic metallogenic belt along the north margin of the North China platform. The secondary metallogenic belt is a synmagmatic tension-shear fault-fracture belt of ENE linear trend. The Indosinian cryptoexplosive breccia body, quartz monzonitic porphyry (beschtauite breccia), quartz monzonite (243.7 Ma, K-Ar), Yanshanian granite-porphyry (105±6 Ma, Rb-Sr) and orebodies mostly occur as dykes or veins and short lenses along the structural fracture belt. The orebodies are emplaced in the fractured cryptoexplosive breccia body in the tectonomagmatic belt and their attitude is consistent with that of the breccia body. The orebodies have two types: one is shallow-seated thick and big ones, which are short-lenticular in plan and wedge-shaped in cross section, shallow buried, large in size a 相似文献
10.
Please refer to the attachment(s) for more details. 相似文献
11.
铲子坪金矿的构造成矿作用 总被引：11，自引：0，他引：11
溆浦一五团超壳深大断裂的长期活动,形成了雪峰山构造岩浆带。构造岩浆作用形成的离能环境引起其影响范围内的金元素从沉积岩中活化,含金热液由高能部位沿北东、北北东向逆冲断层向低能部位迁移,聚集到北西向张性负压断裂破碎带,充填、交代形成了铲子坪构造破碎带蚀变岩型金砂床。 相似文献
12.
江西洋鸡山金矿矿相学研究 总被引：1，自引：0，他引：1
楼亚儿 《矿物岩石地球化学通报》1996,(3)
江西洋鸡山金矿矿相学研究楼亚儿（中国地质大学，北京１０００８３）关键词洋鸡山金矿，矿相学，矿物标型特征，隐爆角砾岩江西瑞昌洋鸡山金矿为长江中下游钢－金矿田中一个典型的独立金矿床。矿体赋存在燕山早期石英闪长玢岩与五通组地层接触带附近的隐爆角砾岩筒中，矿... 相似文献
13.
吉林省夹皮沟金矿成因研究 总被引：1，自引：0，他引：1
吉林省夹皮沟金矿区金矿赋存在夹皮沟北西向韧性带内,控矿构造为叠加在韧性剪切带之上的脆性构造。中生代中酸性脉岩为成矿期脉岩,且与黄泥河花岗岩岩基有着密切的成因联系。成矿物质主要来自岩浆分异,金丰度值高的暗色岩类提供部分矿质。 相似文献
14.
贵州水银洞金矿床矿石特征及金的赋存状态 总被引：24，自引：8，他引：24
详细阐述了水银洞金矿床的矿石物质组成、化学成分、结构构造、矿物嵌布特征，初步划分了成矿期及成矿阶段，对金的赋存状态进行了初步研究。 相似文献
15.
萨热阔布金矿是阿尔泰山南缘金一多金属矿带中与断裂变质作用有关的石英脉一蚀变岩型金矿床。本文通过电子探针的研究,在该矿区发现较多的自然铋矿物,它与金矿化关系非常密切,产出于多金属硫化物阶段,与方铅矿、黄铜矿等共生。矿区蚀变岩和矿石的微量元素R型聚类分析表明,Bi与Au相关最密切,Au、Cu、Ag、Bi是主要的成矿元素组合。Bi异常可以作为金矿化的重要指示,自然铋矿物的出现可以作为含金石英脉富矿地段的重要标志。 相似文献
16.
焦家金矿主矿区金矿石的赋存特征 总被引：2，自引：1，他引：1
焦家金矿带是莱州-招远金矿区最重要的金矿带之一,产状复杂且性状变化较大。以往研究主要针对矿物种类、载金矿物及其形状及嵌布关系等进行分析,缺乏对金粒矿物学、金矿物种类及金颗粒的成色研究。本文采用偏光/反光显微镜、体视显微镜、扫描电镜、能谱仪、X射线衍射仪等技术手段对焦家金矿主矿区深部开采的矿石样品进行分析,研究内容主要包括金赋存状态、金粒度、金形状、金矿物类型及不同大小金粒的成色特征。结果表明:载金矿物主要以黄铁矿、黄铜矿等硫化矿和石英、长石等脉石矿物为主。金赋存状态有裂隙金(64.82%)、包裹金(19.29%)、晶隙金(15.89%);黄铁矿、黄铜矿中金粒较大,连群分布占多数,脉石中金粒细小,孤立分布占多数。金矿物形状复杂,主要有球状金、三角形金、矩形金。金矿物种类丰富,以自然金、银金矿、自然银、含铁自然银为主,其次为金铜矿、螺硫银矿、碲化金银。金矿物粒度范围较大,大金颗粒可达到90~110 μm,小金颗粒只有2~3 μm。金银矿物的成色普遍较高,大粒金成色低,以银金矿为主,小粒金成色高,大都为自然金。本文丰富了焦家金矿矿物学研究的内容,为后续选冶工艺提供了调控依据和重要信息。 相似文献
17.
《地质学报》2015,(8)
Maevatanana金矿床位于马达加斯加中部。由于地表覆盖较厚,有关该金矿床的研究程度甚低。目前通过ZK3-5钻孔发现,在Maevatanana金矿区隐伏花岗岩脉下部发育金矿化,Ⅰ-1金矿体中黄铁矿Re-Os等时线年龄为534±13 Ma,在泛非构造事件后A型花岗岩的成岩时代范围内(537~522Ma)。野外地质证据和室内试验数据表明,Maevatanana金矿床的形成和泛非构造事件后花岗岩具有密切的成因联系。该花岗岩是幔源起源的花岗岩,当铁镁质岩浆进入长英质岩浆时,产生了大量的气液流体,萃取了长英质岩浆中的金。因此,岩浆混合作用对Maevatanana金矿床的形成起了重要作用。 相似文献
18.
赵家堡子金矿位于猫岭-卧龙泉金矿化集中区,是典型的中低温热液矿床。通过区域变质作用,使岩层中的Au、Ag等成矿元素活化,随着变质热液运移到有利的构造部位初步富集;通过应力作用,使岩石发生塑性变形,形成了北西向的韧性剪切带。同时,使Au、Ag等成矿元素再次活化转移、富集;通过后期构造岩浆的大面积侵入,形成了叠加在韧性剪切带之上的北西向韧-脆性断裂和北东向的脆性断裂,同时宏大的热源使地层中的Au再次活化、迁移、富集,同岩浆所带来的大量成矿物质一起在有利的构造部位富集成矿,是本区金矿的主要成矿阶段。 相似文献
19.
Agung Harijoko Yukiko Ohbuchi Yoshinobu Motomura Akira Imai Koichiro Watanabe 《Resource Geology》2007,57(2):114-123
Middle Miocene (11.18–10.65 Ma) low sulfidation‐type epithermal gold mineralization occurred in the Cibaliung area, southwestern part of Java Island, Indonesia. It is hosted by andesitic to basaltic andesitic lavas of the Middle Miocene Honje Formation (11.4 Ma) and is covered by Pliocene Cibaliung tuff (4.9 Ma). The exploration estimates mineral resource of approximately 1.3 million tonnes at 10.42 g/t gold and 60.7 g/t silver at a 3 g/t Au cut‐off. This equates to approximately 435,000 ounces of gold and 2.54 million ounces of silver. That resource resulted from two ore shoots: Cibitung and Cikoneng. Studies on ore mineralogy, hydrothermal alteration, geology, fluid inclusion, stable isotopes and age dating were conducted in order to characterize the deposit and to understand a possible mechanism of preservation of the deposit. The ore mineral assemblage of the deposit consists of electrum, naumannite, Ag‐Se‐Te sulfide minerals, chalcopyrite, pyrite, sphalerite and galena. Those ore minerals occur in quartz veins showing colloform–crustiform texture. They are enveloped by mixed layer clay illite/smectite zone, which grades into smectite zone outward. The temperature of mineralization revealed by fluid inclusion study on quartz in the veins ranges from 170 and 220°C at shallow and deep level, respectively. The temperature range is in agreement with the temperature deduced from the hydrothermal alteration mineral assemblage including mixed layered illite/smectite and laumontite. The mineralizing fluid is dilute, with a salinity <1 wt% NaCl equivalent and has stable isotopes of oxygen and hydrogen composition indicating a meteoric water origin. Although the deposit is old enough that it would have been eroded in a tropical island arc setting, the coverage by younger volcanic deposits such as the Citeluk tuff and the Cibaliung tuff most probably prevented this erosion. 相似文献
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