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长坑-富湾金、银矿床硫同位素组成特征及其意义 被引量:16
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作者 毛晓冬 黄思静 《华南地质与矿产》 CAS 2002年第1期17-22,共6页
通过对金、银矿石矿物的硫同位素组成及前人大量资料的综合研究 ,系统讨论了金、银矿床δ3 4S的特征。在δ3 4S分布图上金矿δ3 4S的分布呈波浪式 ,说明硫源较复杂 ,银矿δ3 4S分布呈塔式 ,反映硫来源较单一。运用平克尼 -拉夫特法作Δ3... 通过对金、银矿石矿物的硫同位素组成及前人大量资料的综合研究 ,系统讨论了金、银矿床δ3 4S的特征。在δ3 4S分布图上金矿δ3 4S的分布呈波浪式 ,说明硫源较复杂 ,银矿δ3 4S分布呈塔式 ,反映硫来源较单一。运用平克尼 -拉夫特法作Δ3 4S辉锑矿 -黄铁矿 和Δ3 4S闪锌矿 -方铅矿 对δ3 4SA 和δ3 4SB 关系图 ,分别得到金矿和银矿成矿热液δ3 4SΣS为 - 1 0‰~ +1 6‰和 +0 8‰~ +6 0‰ ,进一步证明金矿硫来源以深源硫和有机还原成因硫为主 ,银矿硫源为无机还原成因硫 ,揭示出金、银矿床成矿物质硫来源上的一定差异。 展开更多
关键词 同位素 同位素分馏 同位素 有机还原 无机还原 银矿床 金矿床
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湘南宝山铅锌银矿床硫同位素的地球化学特征及地质意义 被引量:6
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作者 章勇 罗建镖 +2 位作者 孔华 全铁军 奚小双 《地质与勘探》 CAS CSCD 北大核心 2018年第1期82-89,共8页
成矿热液的总硫同位素组成(ΣS)可以更加准确地反映成矿流体中硫的来源。本文通过对湖南宝山矿床硫同位素以及总硫同位素的研究发现,金属硫化物样品的δ^(34)S值绝大多数为正值,变化区间为6.40‰~6.91‰,一般为-6.40‰~5.29‰,均值为2.2... 成矿热液的总硫同位素组成(ΣS)可以更加准确地反映成矿流体中硫的来源。本文通过对湖南宝山矿床硫同位素以及总硫同位素的研究发现,金属硫化物样品的δ^(34)S值绝大多数为正值,变化区间为6.40‰~6.91‰,一般为-6.40‰~5.29‰,均值为2.22‰,其中黄铁矿δ^(34)S变化范围为-1‰~4.61‰,均值为2.92‰;方铅矿δ^(34)S变化范围为-0.80‰~1.70‰,均值为0.53‰;闪锌矿δ^(34)S变化范围为1.80‰~4.31‰,均值为2.69‰。具有集中的δ^(34)S值分布以及单一的峰值,表明硫的来源比较单一,具有岩浆硫特点,同位素组成具有δ^(34)S_(黄铁矿)>δ^(34)S_(闪锌矿)>δ^(34)S方铅矿的特征,证明成矿物质沉淀时基本达到了硫同位素分馏平衡。通过总硫同位素的分析,得出高温与低温两组数据,通过Pinckney图解计算获得中低温阶段的δ^(34)S_(ΣS)为1.28‰,高温阶段的δ^(34)S_(ΣS)为1.68‰。表明成矿流体的硫同位素组成变化很小,仅有0.4‰,且其总硫同位素组成为1.78‰,均显示矿床成矿流体具有地幔硫的特点,表明矿床中的硫可能来自地幔。 展开更多
关键词 同位素 岩浆 分馏平衡 宝山 湖南
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江苏栖霞山铅锌矿地质特征及成矿规律
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作者 张倩 王芳 +1 位作者 刁谦 孟斐斯 《南方金属》 CAS 2022年第1期26-29,共4页
栖霞山铅锌矿是长江中下游地区最大的铅锌多金属矿床,其成矿物质来源的研究相对薄弱。文章通过对江苏栖霞山铅锌矿床硫化物硫同位素的研究发现,主要金属硫化物的δ34S值变化范围较窄,在-0.7‰~2.9‰,均值为0.8‰;表现出δ34S具有单一的... 栖霞山铅锌矿是长江中下游地区最大的铅锌多金属矿床,其成矿物质来源的研究相对薄弱。文章通过对江苏栖霞山铅锌矿床硫化物硫同位素的研究发现,主要金属硫化物的δ34S值变化范围较窄,在-0.7‰~2.9‰,均值为0.8‰;表现出δ34S具有单一的峰值,且均值分布在0~2‰,表明其他组分的硫来源较少,具有岩浆硫特点。江苏栖霞山铅锌矿床硫同位素组成显示矿床成矿流体主要来源于岩浆硫,铅锌成矿作用主要形成于热液成矿阶段,与同生沉积期无关。 展开更多
关键词 铅锌矿 同位素 热液硫 岩浆 江苏栖霞山
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陆相火山-侵入岩有关的铁多金属矿成矿作用及矿床模型--以长江中下游为例 被引量:83
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作者 毛景文 段超 +1 位作者 刘佳林 张成 《岩石学报》 SCIE EI CAS CSCD 北大核心 2012年第1期1-14,共14页
在长江中下游地区,与白垩纪陆相火山-侵入岩有关的铁多金属矿床在空间上绝大多数发育于白垩纪火山盆地,仅程潮和金山店出现于隆起区;成矿时间上分为两个时代,即133~130Ma和127~125Ma。按照成矿物质来源和成矿过程,鉴别出4个成矿系统:... 在长江中下游地区,与白垩纪陆相火山-侵入岩有关的铁多金属矿床在空间上绝大多数发育于白垩纪火山盆地,仅程潮和金山店出现于隆起区;成矿时间上分为两个时代,即133~130Ma和127~125Ma。按照成矿物质来源和成矿过程,鉴别出4个成矿系统:即在隆起区与石英闪长岩有关的矽卡岩铁矿(系统1);在火山盆地内,与大王山(或砖桥)旋回火山-次火山活动有关的铁多金属矿床(包括,磷灰石-磁铁矿型铁矿、类矽卡岩型铁矿、矿浆型铁矿、热液型硫铜金矿、热液型铅锌矿)(系统2)和与二长-正长岩有关的矽卡岩型铁矿(系统3);与娘娘山(或浮山)旋回火山-次火山活动有关的铜(金)矿和金铀矿(系统4)。盆地内和隆起区的矽卡岩型铁矿形成时间基本一致,略晚于与辉石闪长玢岩有关的铁多金属矿床(系统2),但早于铜金铀为主的成矿系统4。前人以系统2中的磷灰石-磁铁矿型铁矿、类矽卡岩型铁矿和矿浆型铁矿为主,结合其他一些少见或不具工业意义的铁矿类型,提出一个具有广泛影响的玢岩铁矿成矿模式。此文以玢岩铁矿成矿模式为基础,结合4个成矿系统的基本特点,提出了白垩纪陆相火山-侵入岩有关的铁多金属矿床模型。以上这些具有成因联系的矿床系统和类型及其分带互为找矿标志。 展开更多
关键词 磷灰石-磁铁矿矿床 矿浆型铁矿 铜金矿 玢岩铁矿模式 陆相火山岩盆地 白垩纪 长江中下游地区
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Influence of oxidation heat on hard anodic film of aluminum alloy 被引量:5
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作者 魏晓伟 陈朝英 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第11期2707-2712,共6页
The special experimental device and sulfuric acid electrolyte were adopted to study the influence of anodic oxidation heat on hard anodic film for 2024 aluminum alloy. Compared with the oxidation heat transferred to t... The special experimental device and sulfuric acid electrolyte were adopted to study the influence of anodic oxidation heat on hard anodic film for 2024 aluminum alloy. Compared with the oxidation heat transferred to the electrolyte through anodic film, the heat transferred to the coolant through aluminum substrate is more beneficial to the growth of anodic film. The film forming speed, film thickness, density and hardness are significantly increased as the degree of undercooling of the coolant increases. The degree of undercooling of the coolant, which is necessary for the growth of anodic film, is related to the degree of undercooling of the electrolyte, thickness of aluminum substrate, thickness of anodic film, natural parameters of bubble covering and current density. The microstructure and performance of the oxidation film could be controlled by the temperature of the coolant. 展开更多
关键词 aluminum alloy 2024 aluminum alloy oxidation heat sulfuric acid electrolyte hard anodic oxidation anodic film
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哈萨克斯坦努尔卡斯甘大型富金斑岩铜矿地质特征及金赋存状态 被引量:4
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作者 冯浩轩 申萍 +2 位作者 潘鸿迪 曹冲 SEITMURATOVA Eleonora 《岩石学报》 SCIE EI CAS CSCD 北大核心 2018年第3期763-784,共22页
努尔卡斯甘富金斑岩铜矿位于中哈萨克斯坦,是中亚成矿域西段重要的早古生代斑岩型铜金矿床,其形成与早志留世花岗闪长斑岩和石英闪长玢岩有关。矿体由浸染状、(网)脉状和角砾状矿石组成,主要产于花岗闪长斑岩、石英闪长玢岩和石英闪长... 努尔卡斯甘富金斑岩铜矿位于中哈萨克斯坦,是中亚成矿域西段重要的早古生代斑岩型铜金矿床,其形成与早志留世花岗闪长斑岩和石英闪长玢岩有关。矿体由浸染状、(网)脉状和角砾状矿石组成,主要产于花岗闪长斑岩、石英闪长玢岩和石英闪长岩体内以及岩体周围的火山岩地层中。矿床内发育热液磁铁矿、金红石和热液硬石膏。矿区热液蚀变强烈,早期发育青磐岩化和钾钙硅酸盐化(钾长石-阳起石化),随后广泛发育中级泥化,到晚期发育绢云母化。铜矿化与钾钙硅酸盐化和中级泥化蚀变密切相关,矿石矿物主要为黄铜矿,少量斑铜矿和蓝辉铜矿。金矿化主要与中级泥化蚀变关系密切,少量与钾钙硅酸盐化蚀变有关。金矿物主要为细粒自然金和银金矿(多小于10μm)。自然金赋存在蚀变岩中,与硅酸盐矿物关系密切,分布在它们表面、颗粒之间(粒间金)、晶体内(包裹金)和内部裂隙之中(裂隙金,少量)。银金矿主要呈包裹金的形式赋存在于与中级泥化蚀变相关的热液角砾岩的黄铜矿胶结物中。努尔卡斯甘斑岩铜金矿床属于高氧化-高硫岩浆-热液成矿体系,金的大规模沉淀很可能与SO_2歧化反应以及磁铁矿和硬石膏大量结晶而造成的高氧化-高硫成矿热液的SO_4^(2-)/H_2S比值和pH显著降低有关。 展开更多
关键词 硬石膏 蚀变 金赋存状态 高氧化-高岩浆-体系 富金斑岩型铜矿 努尔卡斯甘 哈萨克斯坦
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Adsorption of dimethyl trisulfide from aqueous solution on a low-cost adsorbent:thermally activated pinecone 被引量:1
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作者 商景阁 何伟 范成新 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2015年第1期169-175,共7页
Thermally activated pinecone(TAP) was used for the adsorption of dimethyl trisulfide(DMTS)from aqueous solutions,which was proved to be the main odorous in algae-caused black bloom.The effects of adsorbent dosage,adso... Thermally activated pinecone(TAP) was used for the adsorption of dimethyl trisulfide(DMTS)from aqueous solutions,which was proved to be the main odorous in algae-caused black bloom.The effects of adsorbent dosage,adsorbate concentration and contact time on DMTS biosorption were studied.The TAP produced at 600℃ exhibited a relatively high surface area(519.69 m^2/g) and excellent adsorption capacity.The results show that the adsorption of DMTS was initially fast and that the equilibrium time was6 h.Higher initial DMTS concentrations led to lower removal percentages but higher adsorption capacity.The removal percentage of DMTS increased and the adsorption capacity of TAP decreased with an increase in adsorbent dosage.The adsorption process conforms well to a pseudo-second-order kinetics model.The adsorption of DMTS is more appropriately described by the Freundlich isotherm(R^2=0.996 1) than by the Langmuir isotherm(R^2=0.916 9).The results demonstrate that TAP could be an attractive low-cost adsorbent for removing DMTS from water. 展开更多
关键词 dimethyl trisulfide LOW-COST adsorption isotherms ADSORBENT
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Experimental study on SO_2 recovery using a sodium-zinc sorbent based flue gas desulfurization technology
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作者 张扬 王涛 +2 位作者 杨海瑞 张海 张绪祎 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第1期241-246,共6页
A sodium–zinc sorbent based flue gas desulfurization technology(Na–Zn-FGD) was proposed based on the experiments and analyses of the thermal decomposition characteristics of Ca SO3 and Zn SO3·2.5H2 O, the waste... A sodium–zinc sorbent based flue gas desulfurization technology(Na–Zn-FGD) was proposed based on the experiments and analyses of the thermal decomposition characteristics of Ca SO3 and Zn SO3·2.5H2 O, the waste products of calcium-based semi-dry and zinc-based flue gas desulfurization(Ca–SD-FGD and Zn–SD-FGD) technologies, respectively. It was found that Zn SO3·2.5H2 O first lost crystal H2 O at 100 °C and then decomposed into SO2 and solid Zn O at 260 °C in the air, while Ca SO3 is oxidized at 450 °C before it decomposed in the air. The experimental results confirm that Zn–SD-FGD technology is good for SO2 removal and recycling, but with problem in clogging and high operational cost. The proposed Na–Zn-FGD is clogging proof, and more cost-effective. In the new process, Na2CO3 is used to generate Na2SO3 for SO2absorption, and the intermediate product Na HSO3 reacts with Zn O powders, producing Zn SO3·2.5H2 O precipitate and Na2SO3 solution. The Na2SO3 solution is clogging proof, which is re-used for SO2 absorption. By thermal decomposition of Zn SO3·2.5H2 O, Zn O is re-generated and SO2 with high purity is co-produced as well. The cycle consumes some amount of raw material Na2CO3 and a small amount of Zn O only. The newly proposed FGD technology could be a substitute of the traditional semi-dry FGD technologies. 展开更多
关键词 Flue gas desulfurization Waste treatment Zn SO3·2.5H2O pyrolysis Sodium–zinc sorbent based SO2co-production
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Coupled Fe–S isotope composition of sulfide chimneys dominated by temperature heterogeneity in seafloor hydrothermal systems 被引量:6
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作者 Shujie Wang Weidong Sun +2 位作者 Jing Huang Shikui Zhai Huaiming Li 《Science Bulletin》 SCIE EI CAS CSCD 2020年第20期1767-1774,M0004,共9页
Seafloor hydrothermal chimneys are significant metal resources and have fundamental effects on marine chemistry balance.Previous studies on growth of the chimneys focused on mineral composition and elemental distribut... Seafloor hydrothermal chimneys are significant metal resources and have fundamental effects on marine chemistry balance.Previous studies on growth of the chimneys focused on mineral composition and elemental distribution in chimney walls,but the isotopic composition of different elements and their correlations remain poorly understood.Here,we report lateral Fe and S isotopes from sulfides across a chimney wall in detail from the Deyin-1 hydrothermal field(DHF) on the South Mid-Atlantic Ridge.Pyrite was characterized by increases in both δ34S and δ56Fe from the exterior to the interior within the chimney wall,which is likely related to enhanced S and Fe isotope fractionation between pyrite and fluids derived from the temperature gradient.Furthermore,δ56Fe displayed a well-defined,linear,positive correlation with δ34S in pyrite from the DHF as well as in pyrite from other areas.A model of hydrothermal pyrite formation suggests that,under conditions with uniform hydrothermal fluid,different temperatures and similar pyrite-fluid exchange degrees could result in the observed linear relationships between δ34S and δ56Fe.The regular and coupled Fe-S isotope variations within the chimney wall efficiently constrain the process of hydrothermal sulfide formation. 展开更多
关键词 Sulfide chimney Iron isotope Sulfur isotope TEMPERATURE
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Thermal behavior and phase behavior in blends of liquid crystalline poly(aryl ether ketone) and poly(aryl ether ether ketone) containing thioether units
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作者 LI Ye1, CHEN Jian2, LIU XinCai1 & YANG DeCai2 1Alan G. MacDiarmid Institute, Jilin University, Changchun 130012, China 2State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China 《Science China Chemistry》 SCIE EI CAS 2012年第4期612-617,共6页
Thermal behavior and phase behavior in blends of liquid crystalline poly(aryl ether ketone) with lateral methoxy groups (M-PAEK) and poly(aryl ether ether ketone) containing thioether units (S-PEEK) have been investig... Thermal behavior and phase behavior in blends of liquid crystalline poly(aryl ether ketone) with lateral methoxy groups (M-PAEK) and poly(aryl ether ether ketone) containing thioether units (S-PEEK) have been investigated by differential scanning calorimetry (DSC) and polarized light microscopy (PLM) techniques. The results indicate that the composition of the blends has great effect on the phase behavior and morphology. Thin films of pure M-PAEK and S-PEEK crystallized from the melts exhibit typical mosaic and spherulitic structures, respectively. For the blends with higher M-PAEK contents (> 50%), an unusual ring-banded spherulite with structural discontinuity is formed. The bright core and rings of the ring-banded spherulites under PLM are composed of M-PAEK phase, while the dark rings consist mainly of S-PEEK phase. For the 50:50 M-PAEK/S-PEEK blend, the ring-banded spherulites and S-PEEK spherulites coexist, which implies that a partial phase separation between the two components takes place in the melting state. In S-PEEK-rich blends, a volume-filled spherulite is produced. In addition, the effect of isothermal crystallization temperature on the phase behavior, especially the ring-banded spherulite formation in the blends, is discussed. 展开更多
关键词 liquid crystalline poly(aryl ether ketone) poly(aryl ether ether ketone) containing thioether units phase behavior rhythmically grown ring banded spherulite
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