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31.
新开锑矿由一个民采矿点经笔者普查— 4 0 9队详查—初勘 ,提升为一个具规模开发意义的中型锑矿床。本文概述了其矿床地质特征及进一步找矿的认识。 相似文献
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贵州独山箱状背斜锑矿(独山锑矿田)位于扬子准地台向华南褶皱带逐步过渡地带,扬子准地台黔南台陷贵定南北向构造变形区东部,黔南坳陷带的独山箱状背斜核部南段近倾伏端。在该锑矿田中,共有二十二个矿床(点),其中大型矿床一个、中型二个。尤以半坡大型锑矿矿床矿量集中,矿质优良而闻名全国。矿体有半坡、蕊燃沟陡倾斜大脉和甲拜、巴年层状、似层状"整合型"两种产出类型。 相似文献
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贵州低温热液型汞、锑、金矿床成矿谱系——以晴隆大厂、兴仁紫木凼和铜仁乱岩塘为例 总被引:2,自引:0,他引:2
贵州是我国低温热液型汞、锑、金矿的重要产区,但对其成矿时代一直存在不同看法.本次研究采用Sm-Nd同位素等时线法对晴隆大厂锑矿、兴仁紫木凼金矿和铜仁乱岩塘汞矿区的萤石、方解石分别进行了同位素年代学的研究,结果表明晴隆大厂锑矿中的方解石(Sm-Nd等时线年龄为148±13 Ma,钕初始值为0.512256)和萤石(Sm-... 相似文献
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西藏拉木由塔锑(金)矿床位于藏南Sb-Au成矿带东段,矿(化)体主要赋存于中侏罗统遮拉组地层与辉绿(玢)岩脉接触带上。研究表明:石英中的流体包裹体普遍较小,主要为富液相的气液两相包裹体,形态复杂多样,主要呈长条状、浑圆状、椭圆状及不规则状。方解石中的包裹体普遍较大,也都为富液相的气液两相包裹体,形态简单,以负晶形及不规则状为主。包裹体显微测温结果显示,均一温度范围为150~344 ℃,盐度(NaCl)介于0.53%~9.61%,密度介于0.55~0.93 g/cm3,成矿压力变化于39~83 MPa,表明成矿过程主要在中低温条件下进行,成矿流体为低盐度、低密度流体。从成矿早期到晚期,流体包裹体的均一温度、盐度、压力不断降低。氢-氧同位素地球化学研究表明,含矿石英脉δDV-SMOW变化范围为-137‰~-163‰,δ18OH2O变化于9.42‰~14.58‰,含矿方解石δDV-SMOW变化范围为-148‰~-151‰,δ18OH2O变化于-9.83‰~-17.02‰,成矿流体中的水主要来自大气降水。该矿床成矿物质的沉淀主要是由水岩反应和混合作用引起的。 相似文献
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The Zhazixi Sb–W deposit in the Xuefeng uplift, South China, exhibits a unique metal association of W and Sb, where the W orebodies are hosted by interlayer fractures and the Sb orebodies are contained within NW-trending faults. This study proposes that the W and Sb mineralization took place in two separate periods. The mineral paragenesis of the W mineralization reveals a mass of quartz, scheelite and minor calcite. The mineral assemblage of the Sb mineralization developed after W mineralization and consists of predominantly quartz and stibnite, and small amounts of native Sb, berthierite, chalcostibnite, pyrite, and chalcopyrite. Fluid inclusions in quartz and coexisting scheelite are dominated by two-phase, liquid-rich, aqueous inclusions at room temperature. Microthermometric studies suggest that ore-forming fluids for W mineralization are characterized by moderate temperatures (170–270 °C), low salinity (3–7 wt% NaCl equiv.), low density (0.75–0.95 g/cm3), and moderate to high pressure (57.2–99.7 MPa) and these fluids experienced a cooling and dilution evolution during W mineralization. Ore-forming fluids for Sb mineralization are epithermal types with low temperatures (150–230 °C), low salinity (4–6 wt% NaCl equiv.), moderate density (0.82–0.94 g/cm3), and high pressure (42.2–122.5 MPa) and these fluids display an evident decline in homogenization temperature during Sb mineralization. Laser Raman analyses of the vapor phase indicate that the ore-forming fluids for both W and Sb mineralization contain a small amount of CO2.The ore-forming fluids for Sb mineralization are identified as predominantly originating from the continental crust, as suggested by the low 3He values (0.009 × 10−12 cc.STP/g) and 3He/4He ratios (0.002–0.056 Ra) as well as high 36Ar values (1.93 × 10−9 cc.STP/g) and 40Ar/36Ar ratios (909.5–2279.7). The source of S is identified to be the Neoproterozoic Wuqiangxi Formation, as traced by the δ34SV-CDT values of stibnite (3.1–9.4‰). The 208Pb/204Pb (37.643–40.222), 207Pb/204Pb (15.456–15.681), and 206Pb/204Pb (17.093–20.042) ratios suggest a mixture of lower crustal and supracrustal Pb sources.It is thus concluded that the ore genesis of the Zhazixi Sb–W deposit is related to the intracontinental orogeny during the early Mesozoic. Fluid mixing is considered to be the critical mechanism involved in W mineralization, whereas a fluid cooling process is responsible for Sb mineralization. Furthermore, the absence of Au is attributed to the low Σas content in Sb-mineralizing fluids. 相似文献
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Eduardo Teixeira Mansur Sarah‐Jane Barnes Dany Savard Peter C. Webb 《Geostandards and Geoanalytical Research》2020,44(1):147-167
The study of Te, As, Bi, Sb and Se (TABS) has increased over the past years due to their use in the development of low‐carbon energy technologies. However, there is a scarcity of mass fraction values of TABS in geological reference materials. This underlines the difficulty in undertaking routine determinations of these elements. The mass fractions of TABS were determined in geological reference materials using hydride generation‐atomic fluorescence spectrometry (HG‐AFS), calibrated with standard solutions. Comparisons with literature values were used to validate the method. Samples from the GeoPT proficiency test were also analysed. For most elements, there are no assigned or even provisional values for many of the GeoPT and reference materials because of the wide range of results reported. For mass fractions above the quantification limit of the method, our results are in good agreement with the median of GeoPT results. Thus, we propose GeoPT median values as informational values for these elements. In contrast, at mass fractions < 0.5 µg g?1 median values of Se from GeoPT are systematically higher than our results. Our Se results are in agreement with the reference materials down to 0.02 µg g?1, which suggest that many of the results for Se reported in GeoPT testing are too high. 相似文献
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本文概述了枣子排锑矿床的地质特征,阐明了矿床是以构造为主,地层、岩性(岩相)联合控矿。研究表明,本矿床有着良好的找矿前景。 相似文献
40.
土壤重金属污染物的环境效应与其无机价态有密切的关系.As、Cr、Sb和Se元素的价态测定意义重大,但由于价态之间易发生转化使测定工作存在较大难度,标准化程度较低.地质行业标准DD2005-3推荐使用离子交换树脂分离,原子荧光光谱差减法测定As、Sb、Se价态及石墨炉原子吸收光谱法(GFAAS)测定Cr价态.这些方法前处... 相似文献