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大兴安岭北部甲乌拉铅锌银矿床Rb-Sr同位素测年及其地质意义
硫化物Rb-Sr定年 成矿时代 成矿物质来源 甲乌拉铅锌银矿床 大兴安岭北部
2013/11/27
甲乌拉铅锌银矿床位于内蒙古自治区满洲里市南西150km。矿床产于中蒙古-额尔古纳兴凯造山带南东缘之得尔布干断裂北西侧。本文在甲乌拉矿床选取7件闪锌矿和6件黄铁矿样品开展了Rb-Sr定年。获得闪锌矿的Rb-Sr等时线年龄为143.0±2.0Ma（MSWD=3.2），锶同位素初始值ISr=0.71265；黄铁矿的Rb-Sr等时线年龄为142.0±3.0Ma（MSWD=5.7），锶同位素初始值ISr=0...
八方山-二里河铅锌矿床位于陕西凤县-太白(简称凤太)矿集区西北部,矿体主要产于中泥盆统古道岭组与上泥盆统星红铺组接触带中,受NWW向八方山-二里河背斜控制。本次工作对二里河铅锌矿床主成矿阶段的闪锌矿进行了Rb-Sr同位素测年研究,获得了等时线年龄为220.7±7.3Ma,表明矿床形成于晚三叠世,该年龄对于整个凤太矿集区的铅锌成矿时代具有同样约束意义。闪锌矿的87Sr/86Sri值为0.714145...
本文采用亚样品取样和Rb/Sr同位素方法对安徽铜陵新桥铜-硫铁-金矿床层状矿体矿石矿物--黄铁矿直接进行Rb-Sr等时线法测定,获得了112.6±7.8Ma的Rb-Sr等时线年龄,它代表了主成矿期成矿作用的时代.结合已有地质资料认为燕山晚期成矿作用在新桥铜-硫铁-金矿床的形成中居重要作用.
Mineralogical and Rb-Sr Isotope Studies of Low-Temperature Diagenesis of Lower Cambrian Clays of the Baltic Paleobasin of North Estonia
Baltic Paleosedimentary Basin Cambrian Low-Temperature Diagenesis Illitization
2000/12/1
Abstract: X-ray diffraction (XRD), Rb-Sr isotope analysis, transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and Fourier transform infrared (FTIR) methods were used t...
新疆西准噶尔地区不同类型金矿床Rb—Sr同位素年代研究
金矿床 新疆 准噶尔地区 铷－锶年代学
2000/6/30
西准噶尔地区是新疆最重要的金矿区之一。已发现大、中、小型金矿床１０余个，金矿化点数百处。矿石类型有含金石英大脉开明、石英网脉开明和蚀变岩型。矿床成因类型有４种：一册热液型，其成因与区内早－中石炭世火山作用有关；二为潜火山热液型，与中酸性斑岩体侵位有关；三为岩浆热液型，与花岗质岩浆的侵位有关；四为动力变质热液型，沿断裂带分布于蚀变玄武岩中，系区域动力变质作用的产物。成矿作用及相关地质事件同位素年代学
Na, K, Rb and Cs exchange in heulandite single crystals: Diffusion kinetics
Na K Rb Cs exchange heulandite single Diffusion kinetics
1997/5/7
Diffusion-exchangekineticsweredeterminedattemperaturesbetween320and425KforNa
insinglecrystalsofnaturalheulandite,Na Ca K (Al Si O )!/n O,and
0.96 3.54 0.09 8.62 27.51 72 2K,Rb ,andCs forNa inNa-exch...
Mechanism of Adsorption and Desorption of Water Vapor by Homoionic Montmorillonites: 2. The Li+, Na+, K+, Rb+, and Cs+-Exchanged Forms
Adsorption Desorption Exchangeable cations Immersion microcalorimetry Montmorillonite Relative humidity Surface area XRD
1995/6/1
Methods previously used to distinguish between water adsorbed on external surfaces and in the interlamellar space of Na-montmorillonite during adsorption and desorption of water vapor have been extend...
Characterization of Mg-Saponites Synthesized from Gels Containing Amounts of Na+, K+, Rb+, Ca2+, Ba2+, or Ce4+ Equivalent to the CEC of the Saponite
Cation exchange capacity Saponite Synthesis Thermal analysis X-ray powder diffraction
1994/12/1
Abstract: Saponites were hydrothermally grown in the presence of amounts of NH4+, Na+, K+, Rb+, Ca2+, Ba2+, and Ce4+ equivalent with the CEC of the saponite (155 meq/100 g), with or without F-, at a t...