共查询到20条相似文献，搜索用时 62 毫秒
1.
郴州西山地区银铅锌矿床地质特征及找矿方向 总被引：2，自引：0，他引：2
西山地区已发现枞树板、南风坳、铁石垄等大、中型银铅锌矿床、矿点28处，其中热液充填型矿床最为重要。赋矿地层以震旦系浅变质碎屑岩为主，矿体严格受NE30°～60°断裂控制，多呈脉状，个别呈透镜状、扁豆状，走向长数百至千余米，倾向延深100～400 m，厚1～2 m。矿脉沿走向和倾向常出现分枝复合、膨大缩小、尖灭再现等现象。矿石品位（%）：Pb 2.84～7.83、Zn 1.88～4.50、Ag 52.33～242.21 g/t。硅化、绿泥石化、铁帽、老窿、炉渣等为直接找矿标志。圈出了3个找矿远景区，找矿潜力大。 相似文献
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内蒙古孟恩陶勒盖银铅锌铟矿床的微量元素地球化学 总被引：4，自引：0，他引：4
孟恩陶勒盖银铅锌铟多金属矿床位于内蒙古东部,是产于海西期酸性岩浆岩体内部的热液脉状矿床,40多个矿体分布于东西长6km、南北宽200～1000m的范围内,成矿温度西高东低。矿床有用组分以Pb、Zn为主,伴生有Ag、Sn、In和Ga,其中Ag1800t,Sn2000多t,In400多t,Ga100多t,构成一个典型的多金属矿床。一部分Ag以银矿物形式存在,另一部分Ag存在于方铅矿和闪锌矿中。除锡石和黄锡矿外,方铅矿也含有较高的锡。In和Ga主要存在于闪锌矿中。矿石中w(Ag)=82×10-6～516×10-6,w(Cd)=94×10-6～1430×10-6,w(In)=12×10-6～295×10-6,w(Ga)=3×10-6～82×10-6;方铅矿中w(Ag)=1580×10-6～4995×10-6,w(Sn)=735×10-6～2785×10-6,In和Ga很低;闪锌矿中w(Ag)=280×10-6～2030×10-6,w(Cd)=0 18%～0 44%,w(In)=85×10-6～2660×10-6,w(Ga)=11×10-6～155×10-6。从西向东,Sn和In含量降低,Ag和Ga含量增高。这一变化与成矿温度由西向东的降低一致。 相似文献
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笔者等在哇洪山断裂带中段发现了多条品位较高的锌铅银等多金属矿化带。野外构造地球化学剖面样品经青海省第八地质队和河北地矿局廊坊物探实验室原子吸收光谱定量分析(部分进行了化学分析),此区数个剖面Zn、Pb、Ag、Cu、Au等元素含量达到或远大于工业品位。ZP7剖面18个样品中,5个Pb含量>1％,最高达3.71％;7个Zn含量>1％,最高达3.59％;6个Ag单项分析样品中4个Ag含量>30×10~(-6),最高达424×10~(-6);此外部分样品还伴生金,1个样品Au含量达到1.776×10~(-6)。该剖面区含矿多金属矿化蚀变破碎带露头长度300余米,控制宽度2～5m。ZP19剖面有3处样品铅锌含量大于0.1％,其中Pb最高为2.11％,Zn最高为0.64％,并见到致密铅锌矿化团块1处,该致密方铅矿化团块Pb含量为23.8％,Zn含量为6.15％,Cu含量为0.42％,Ag含量高达476×10~(-6)。ZP21剖面中7个样品锌铅银含量大于或接近工业品位,Pb最高达1.18％,Zn最高达 相似文献
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Pongkor矿床属于浅成低温热液 Au- Ag矿床 ,金储量至少为 98t,平均品位为 16 .4× 10 -6;银储量10 2 6 t,平均品位 171.2× 10 -6.它是印尼新近发现的规模较大的 Au- Ag矿床 .冰长石 4 0 Ar/3 9Ar成矿年龄值为 2 .0 5± 0 .5Ma.矿床属于低硫化物浅成低温热液型 ,含有 4条主要的石英脉矿体 .石英脉主要位于火山构造凹陷 (破火山口 )的内缘 ,形成于爆破溶结凝灰岩的喷发 .该喷发产生了火山碎屑熔岩、火山砾及少量碎屑岩夹层 ,构成区内火山岩组合 ,不整合覆盖于中新世安山岩之上 .矿床矿体厚度较大 ,平均厚度为 4 .2 m,陡倾斜 ,由石英、方… 相似文献
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西藏谢通门县雄村斑岩型铜金矿床成因讨论——来自元素的空间分布特征的证据 总被引：6，自引：0，他引：6
西藏谢通门县雄村铜金矿的成矿与含眼球状石英斑晶的角闪石英闪长玢岩有关,并至少受3个玢岩岩枝控制。主成矿元素为Cu,伴生元素为Au、Ag、Zn、Pb,其他微量元素Mo、As、Ba、Bi、Cd、Co、Mn、Ni、Sb含量较高。元素在垂向上具有分带特征,即从矿体中心向外可依次划分为Cu、Au、Ag、As、Sb、(Bi)→Co、Ni→Mo→Mn→Ba→Pb、Zn、Cd、Bi、(Sb),上述元素的异常和组合是寻找和评价该类矿床的重要地球化学标志。矿床的形成经历了早期Cu—Au—Ag成矿和晚期Zn—Pb—Cu—Au—Ag成矿两个阶段:早期成矿阶段形成了Cu—Au—Ag主矿体,晚期叠加Zn—Pb—Cu—Au—Ag矿化。Cu与Au、Ag呈显著的正相关,Cu主要呈独立矿物黄铜矿产出,Au、Ag主要赋存于黄铜矿中。矿石的K/Na值为6.9、Rb/Sr值为0.8,显示出矿床矿富K、Sr和贫Na、Rb的成矿环境;而Au(平均品位0.6×10-6)0.4×10-6、Au(0.6×10-6)/Cu(0.4%)1和n(Cu)/n(Au)(为20678)40000以及Mo(19.7×10-6),说明该矿床富金而贫钼。矿床所处的大地构造位置,成矿与偏中性的斑岩有关,元素组合特征,异常元素在垂向上的分带特征,主成矿阶段的Cu—Au—Ag矿化和晚期叠加的Zn—Pb—Cu—Au—Ag矿化,富Cu、Au、Ag和贫Mo的成矿元素组合及富K、Sr和贫Na、Rb的成矿环境,均表明矿床具有产于岛弧或类似岛弧环境的斑岩型铜金矿床的特征且叠加斑岩成矿系统晚期呈脉状产出的浅成低温热液型Zn—Pb—Cu—Au—Ag矿化。 相似文献
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西藏谢通门县雄村铜金矿床元素地球化学特征 总被引：16，自引：6，他引：10
已经查明西藏雄村铜金矿床的Cu 、Au资源量达到超大型规模.通过对雄村铜金矿床Ⅰ号矿体详细的地质编录和测年成果,发现雄村斑岩型铜(金)矿床形成于晚侏罗世,矿体的形成与晚侏罗世侵位的、含眼球状石英斑晶的闪长玢岩(J3δομ)有关,成矿岩体呈不规则的岩枝状,全岩矿化,岩体中Au的平均品位大于1g/t,Cu含量大于0.7%.含矿围岩是早、中侏罗世的凝灰岩,近岩体部分矿化强烈.矿体被后期侵位的多种岩脉穿插,并被始新世侵位的谢通门大岩基黑云母花岗闪长岩穿插和破坏,岩脉的Cu、Au、Ag含量极低,黑云母花岗闪长岩(E2γδβ)Cu、Au、Ag的平均品位(733件样品分析结果统计)分别为0.0091%、0.0053 g/t、0.279 g/t;成矿前侵位的角闪石英闪长玢岩(J2δομ)Cu、Au、Ag的平均品位(1 414件样品分析结果统计)分别为0.0105%、0.048 g/t、0.395 g/t;穿插矿体的安山岩脉Cu、Au、Ag的平均品位(527件样品分析结果统计)分别为0.065%、0.068 g/t、0.728 g/t,穿插矿体的闪长岩脉的Cu、Au、Ag的平均品位(87件样品分析结果统计)分别为0.081%、0.091 g/t、0.818 g/t.根据167个勘探钻孔编录和化学分析(24 369件化学分析样品)资料,以及对海拔4 000 m、3 950 m、3 900 m水平面的Cu、Au、Ag、Mo、Mn、Pb、Zn、W、K、Na、Ca、Rb元素分布规律的分析,显示矿体具有斑岩型矿床的蚀变、矿化以及元素地球化学特征,主要矿化和围岩蚀变在时间上和空间上均与含眼球状石英斑晶的角闪石英闪长玢岩(J3δομ)有关.成矿期间与矿化热液活动有关的蚀变主要有:①早期钾硅酸盐化;②红柱石次生石英岩化(硅化);③黄铁绢英岩化;④青磐岩化.成矿期形成的脉体类型主要有早期石英-红柱石-硫化物脉、红柱石-黑云母-硫化物脉、磁铁矿-黑云母-硫化物脉、富黄铜矿硫化物脉、黄铁矿脉和多金属矿脉.从矿体中心向外,元素具有明显的分带特征.在矿体中心局部,由于红柱石-次生石英岩化蚀变作用强烈,致使K、Rb等元素向外迁移.矿石富K贫Na,以及K与Rb具有良好的相关性的特点均与国内外典型的斑岩铜矿床相似. 相似文献
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黑龙江六九山铜银矿床位于大兴安岭成矿带中东部,是近年发现的浅成低温热液型矿床.矿床产于爆破角砾岩带中,矿带东西长约1200 m,南北宽约500 m.矿带分布范围与角砾岩带基本一致,产于晚侏罗世花岗闪长岩和白音高老组火山岩中.共圈定24条矿体,其中工业矿体19条.矿体呈不规则脉状、透镜状,总体走向61°,倾向北西,倾角20~35°.矿体长度不大于780 m,一般在300 m左右,平均厚度7.18 m.矿体平均品位Cu 0.59%~1.01%,伴生Ag 3×10-6~5×10-6.矿床平均品位Cu 0.73%,伴生Ag 5.87×10-6.六九山地区火山-岩浆活动强烈,在方圆20余平方千米内发育有9座中心式火山.六九山铜银矿床与中生代火山-岩浆活动关系密切,其形成大致可分为3个阶段：早二叠世成矿物质准备阶段,晚侏罗世成矿物质初步富集阶段和早白垩世成矿阶段. 相似文献
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福建建阳水吉Ⅵ号矿带铅锌银矿床地质特征 总被引：1，自引：0，他引：1
福建建阳水吉Ⅵ号矿带铅锌银矿床是我省首次探明的一个中型规模的铅锌、银共生矿床。矿体产在新华夏系北北东向的 F_11断裂中。主矿体ⅥA_1呈似层状,长900多米,延深600米以上,总体走向3°—5°,倾向北西,倾角45°—55°,沿走向、倾向均呈舒缓波状变化。矿体厚1—7米,平均近6米,矿体形态较规则。矿石结构主要为半自形—自形粒状、他形粒状、聚粒锒嵌状。矿石构造以斑杂状—斑点状、角砾状、浸染状、细脉浸染状为主。矿体含Pb2%、Zn1.4%、Ag 约50g/t,它们的分布较均匀;伴生有金、砷、镓、铜、硫等元素。矿体顶板围岩主要为构造角砾岩和闪长岩,底板围岩一般是云母斜长变粒岩。近矿围岩具蚀变分带现象。这是一个与上元古界麻源群第一段地层、新华夏系北北东向断裂构造、燕山期中基性侵入岩有密切关系的火山沉积变质—热液改造型矿床。 相似文献
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《四川地质科技情报》1994,(2):9-19
厚婆坳矿床为一锡石硫化物脉状矿床。矿区位于广东省潮洲市正西12公里。地理坐标：东经116°32′31”，北纬23°40’00”。矿床类型：脉型。矿化类型：Sn-Pb-Zn-Ag。主要金属锡、铅、锌三元素具中型规模，全区平均品位Sn0．54%、PB3．28％，Zn1．77％，银矿储量规模已达大型。Ag品位100克／吨。伴生元素Cd、In。 相似文献
11.
Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
13.
The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.) 相似文献
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正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology, 相似文献
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正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.) 相似文献
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正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se- 相似文献
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正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with 相似文献