检索结果-南通市图书馆

Ridge subduction and porphyry copper-gold mineralization:An overview

Science China Earth Sciences 2010年第4期53卷 475-484页

作者： SUN WeiDong LING MingXing YANG XiaoYong FAN WeiMing DING Xing liang huaying CAS Key Laboratory of Isotope Geochronology and Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Research Center for Mineral Resources School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Graduate University of Chinese Academy of Sciences Beijing 100049China Key Laboratory for Metallogenic Dynamics Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

Many large porphyry Cu-Au deposits are connected to adakitic rocks known to be closely associated with ridge subduction. For example, there are several subducting ridges along the east Pacific margin, e.g., in Chile, Peru, and South America, most of which are associated with large porphyry Cu-Au deposits. In contrast, there are much fewer ridge subductions on the west Pacific margin and porphyry Cu-Au deposits are much less there, both in terms of tonnage and the number of deposits. Given that Cu and Au are moderately incompatible elements, oceanic crust has much higher Cu-Au concentrations than the mantle and the continental crust, and thus slab melts with their diagnostic adakitic chemistry have systematically higher Cu and Au, which is favorable for mineralization. Considering the geotherm of subducting slabs in the Phanerozoic, ridge subduction is the most favorable tectonic setting for this. Therefore, slab melting is the likely link in the spatial association between ridge subduction and Cu-Au deposits. Geochemical signatures of slab melting and hence maybe ridge subduction in less eroded regions in eastern China, the central Asian orogenic belt etc. may indicate important exploration targets for large porphyry Cu-Au deposits.

关键词： ridge subduction porphyry Cu-Au deposits adakite slab melting

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Indosinian isotope ages of plutons and deposits in southwestern Miaoershan-Yuechengling,northeastern Guangxi and implications on Indosinian mineralization in South China

引用

Chinese Science Bulletin 2012年第9期57卷 1024-1035页

作者： WU Jing liang huaying HUANG WenTing WANG ChunLong SUN WeiDong SUN YaLi LI Jing MO JiHai WANG XiuZhang CAS Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Zijin Mining Group Company Limited Xiamen 364200 China Guangdong Nuclear lndustry Bureau Guangzhou 510800 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

The Miaoershan-Yuechengling complex pluton is the largest granitoid complex in the western Nanling metallogenic belt with a surface exposure of >3000 km2.The complex pluton is composed of an early stage granitoid batholith and late stage small intrusions.The early stage batholith contains mainly medium-grained porphyritic mica granite and porphyritic monzonite granite,whereas the late stage intrusions are composed of muscovite granite porphyry and muscovite monzonitic granite.There are many W-Sn-Mo-Pb-Zn-Cu ores in the contact zone between the batholith and strata,forming an ore-rich belt around the batholith.Based on zircon LA-ICP-MS U-Pb ages,the southwestern part of the early stage batholith formed at 228.7 ± 4.1 Ma(MSWD = 2.49),with slightly earlier magmatic activity at 243.0 ± 5.8 Ma(MSWD = 2.62).The Yuntoujie muscovite granite was associated with W-Mo mineralization and has a zircon LA-ICP-MS U-Pb age of 216.8 ± 4.9 Ma(MSWD = 1.44).The Re-Os isochron age of molybdenite from the Yuntoujie W-Mo ore was 216.8 ± 7.5 Ma(MSWD = 11.3).Our new isotope data suggest that the late stage intrusive stocks from the southwestern Miaoershan-Yuechengling batholith were closely associated with W-Mo mineralization from the Indosinian period.These new results together with previous isotope data,suggest that South China underwent not only the well-known Yanshanian mineralization event,but also a widespread Indosinian metallogenic event during the Mesozoic period.Therefore,South China has a greater potential for Indosinian mineralization than previously thought such that more attention should be given to the Indosinian ore prospecting in South China.

关键词： Re-Os同位素年龄中国南方复杂岩体印支期西南部 LA-ICP-MS 锆石U-Pb年龄矿化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

广西大厂矿田100号锡多金属矿体石英阴极发光与微量元素特征及其对成矿过程的指示

引用

大地构造与成矿学 2024年第3期48卷 621-636页

作者：张健廖娟黄文婷伍静陈喜连梁华英南宁师范大学北部湾环境演变与资源利用教育部重点实验室广西南宁530001 中国科学院广州地球化学研究所矿物学与成矿学重点实验室广东广州510640 广西大学资源环境与材料学院广西南宁530004 东华理工大学核资源与环境国家重点实验室江西南昌330013

广西大厂矿田100号锡多金属矿体赋存于中泥盆统生物礁灰岩中,其品位高(Sn 1.9%、Sb 5.78%、Zn 12.4%、Pb 6.55%、Ag 235 g/t)、规模大(矿石量超过1300万吨),是广西大厂锡多金属矿田中非常重要的矿床。本文分析了该矿体中石英的阴极发光(... 详细信息

广西大厂矿田100号锡多金属矿体赋存于中泥盆统生物礁灰岩中,其品位高(Sn 1.9%、Sb 5.78%、Zn 12.4%、Pb 6.55%、Ag 235 g/t)、规模大(矿石量超过1300万吨),是广西大厂锡多金属矿田中非常重要的矿床。本文分析了该矿体中石英的阴极发光(CL)特征、流体包裹体组合及微量元素含量,探讨该巨型特富矿体的成矿过程。矿体成矿过程可划分为成矿前(Q1a石英及稍晚的Q1b石英+细粒方解石)、锡成矿(Q2石英+锡石+毒砂+黄铁矿)、锌铅锑成矿(Q3石英+闪锌矿+磁黄铁矿+脆硫锑铅矿)和成矿后(Q4石英+方解石+白铁矿细脉)四个阶段。Q1a石英CL发浅蓝绿‒蓝紫色光,发育生长环带,含临界均一的流体包裹体,其Al含量为48~265μg/g;Q1b石英CL发淡紫色光,CL结构复杂,显示破裂‒溶解‒再沉淀特征,含有不混溶流体包裹体组合,其Al含量为942~4357μg/g;Q2石英CL发淡蓝紫色光,发育生长环带,与其共生的锡石含有不混溶流体包裹体组合,其Al含量为159~1768μg/g;Q3石英CL发棕褐色光,CL结构均一,含有不混溶流体包裹体组合,其Al含量为53~122μg/g;Q4石英CL不发光,含有低气液比(~15%)水溶液流体包裹体,其Al含量低于检测限(<50μg/g)。Q1a石英发育的临界均一的流体包裹体可能代表深部超临界岩浆流体的出溶。矿体深部最近发现的砂岩角砾及Q1b石英破碎的CL结构和不混溶流体包裹体组合表明成矿前超临界岩浆流体在深部发生了隐爆。Al含量从Q1a石英到Q1b石英急剧上升可能与隐爆引起的晶体生长速率加快有关。而Al含量从Q1b石英到Q2石英到Q3石英逐渐降低暗示了持续的流体不混溶过程中酸性气体(CO2、HCl)的逸失及礁灰岩消耗了流体的H+,导致流体pH值逐渐升高,该过程对锡石及硫化物的沉淀起到了促进作用。Q4石英中发育的低气液比水溶液流体包裹体可能代表成矿后大气降水的加入。

关键词：阴极发光石英微量元素成矿过程 100号锡多金属矿体广西大厂矿田

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

汽车行业涂装薄膜前处理技术升级改造探索——以某汽车制造企业为例

引用

江西化工 2024年第2期40卷 49-52页

作者：梁菊吴欲婧来禹琦梁华英陈涛丁园江铃汽车集团改装车股份有限公司江西南昌330052 南昌航空大学环境与化学工程学院江西南昌330063 江铃汽车股份有限公司安全环保部江西南昌330052

薄膜前处理工艺具有工序简单、绿色环保、成本低等特点,受到企业广泛关注。本文结合某汽车制造企业升级改造案例,针对锌系磷化、锆系薄膜两种汽车涂装前处理工艺,从生产废水、生产成本以及优势特点方面开展对比研究,发现锆系薄膜工艺具... 详细信息

薄膜前处理工艺具有工序简单、绿色环保、成本低等特点,受到企业广泛关注。本文结合某汽车制造企业升级改造案例,针对锌系磷化、锆系薄膜两种汽车涂装前处理工艺,从生产废水、生产成本以及优势特点方面开展对比研究,发现锆系薄膜工艺具有废水中无磷、无镍、少氟、产渣量小,且无需表调工序,室温即可反应,综合能耗低的特点。采用锆系薄膜工艺替代后,企业每年可节省256.3万元。

关键词：汽车制造涂装前处理锌系磷化锆系薄膜

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hydrogel-supported poly(L-lactic acid) and polystyrene microsphere-based three-dimensional culture systems for in vitro cell expansion

引用

Frontiers of Materials Science 2024年第2期18卷 129-137页

作者： huaying Hao Lihong Sun Jiaxuan Chen Jun liang State Key Laboratory of Food Nutrition and Safety Tianjin University of Science&TechnologyTianjin 300457China College of Light Industry Science and Engineering Tianjin University of Science&TechnologyTianjin 300457China College of Food Science and Engineering Tianjin University of Science&TechnologyTianjin 300457China

The in vitro expansion of stem cells is important for their application in different life science fields such as cellular tissue and organ repair.An objective of this paper was to achieve static cell culture in vitro through peptide hydrogel-supported microspheres(MSs).The peptides,with their gel-forming properties,microstructures,and mechanical strengths characterized,were found to have good support for the MSs and to be injectable.The internal structures of poly(L-lactic acid)microspheres(PLLA-MSs)and polystyrene microspheres(PS-MSs)made in thelaboratory were observed and statistically analyzed in terms of particle size and pore size,following which the co-cultured MSs with cells were found to have good cell adhesion.In addition,three-dimensional(3D)culturing of cells was performed on the peptide and microcarrier composite scaffolds to measure cell viability and cell proliferation.The results showed that the peptides could be stimulated by the culture medium to self-assembly form a 3D fiber network structure.Under the peptide-Ms composite scaffold-based cell culture system,further enhancement of the cell culture effect was measured.The peptide-Ms composite scaffolds have great potential for the application in 3D cell culture and in vitro cellexpansion.

关键词： microcarrier microsphere peptide hydrogel cell scaffold three-dimensional culture cell expansion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Emergency physicians’ occupational risks in China

引用

World Journal of Emergency Medicine 2024年第3期15卷 232-234页

作者： huaying Jiang Jia Chang Rong Huang Xiayi liang Manning Song Hejing Yuan Shuo Wang School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 100105China Operation Room Beijing Chaoyang HospitalCapital Medical UniversityBeijing 100020China School of Marxism Beijing University of Chinese MedicineBeijing 100105China Department of Infectious Diseases(Fever Clinic) Beijing Hospital of Traditional Chinese MedicineCapital Medical UniversityBeijing 100010China

With the rapid development of emergency medicine,emergency physicians are working around the clock,[1]including additional workloads due to sudden public health emergencies and disasters.Occupational risks for emergency physicians are significantly high due to an increasing number of patients with acute and severe diseases,an increased workload.

关键词： physician acute occupational

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Identification of an Early–Middle Jurassic oxidized magmatic belt,south Gangdese,Tibet,and geological implications

引用

Science Bulletin 2017年第12期62卷 888-898页

作者： Yinqiao Zou Xilian Chen Wenting Huang Jian Zhang huaying liang Jifeng xu Ling Chen Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesCuangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf Qinzhou UniversityQinzhou 535011China

The south Gangdese region is the site of subduction of the Neo-Tethys and subsequent continental collision. Compared with widespread Cretaceous and Cenozoic magmatism, Early–Middle Jurassic magmatic rocks and related deposits are rarely reported. Our work identified a >200 km long felsic rock belt associated with Cu mineralization in the south Gangdese region. We report here zircon U–Pb ages, zircon Ce^(4+)/Ce^(3+)values, and mineral assemblages of two Cu mineralized intrusions within the belt. A hornblende granite and a diorite porphyry were emplaced at 177.3 Ma and 166.3 Ma, respectively.Geological occurrence and magmatic hematite–magnetite–chalcopyrite intergrowths suggest that Cu mineralization formed coeval with Jurassic intrusions. Mineralized intrusions have high zircon Ce^(4+)/Ce^(3+)and EuN/Eu?N ratios, and hematite–magnetite intergrowths, suggesting their parent magmas were highly oxidized. Hornblende is common and primary fluid inclusions are found in titanite and apatite,indicating their parent magmas were water-saturated and exsolved volatile phases at early stage of magmatic evolution. Those magma characters contribute to the formation of porphyry Cu deposits. Given that majority subduction-related porphyry Cu systems have been eroded following uplift and denudation, the well-preserved Early–Middle Jurassic Cu mineralized igneous rocks in south Gangdese are favorable prospecting targets for subduction-related porphyry Cu deposits.

关键词：中侏罗世早期岩浆岩带早期识别地质意义锆石U-Pb年龄氧化斑岩铜矿床西藏

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Petrogenesis of the Payangazu Complex in Southern Mandalay, Central Myanmar and Its Tectonic Implications

引用

Journal of Earth Science 2019年第1期30卷 20-36页

作者： Kaixuan Li huaying liang Zhiwei Bao Wenting Huang Jian Zhang Long Ren Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences

The Payangazu complex in the central Myanmar is composed mainly of quartz diorite,granodiorite,and some synplutonic mafic dikes.The quartz diorite and granodiorite have zircon U-Pb ages of 130.5±4.0(MSWD=3.5)and 118.4±2.5 Ma(MSWD=2.4),respectively.Rock samples of the quartz diorite and granodiorite are metaluminous,enriched in large-ion lithophile elements like LREE,Rb,Th,and U,and depleted in high field-strength elements such as HREE,Nb,Ta,P,and Ti,indicative of arc-type magmatic affinities.Whole rock samples of the quartz diorite haveε_(Hf)(t)value of+0.6,initial ^(87)Sr/^(86)Sr ratios of 0.708 6 to 0.710 0,andε_(Nd)(t)values of-4.8 to-4.9;whereas rocks of the granodiorite are relatively isotopically enriched,withε_(Hf)(t)values of-5.1 to-7.2,initial ^(87)Sr/^(86)Sr ratios of 0.711 7 to 0.711 8,andε_(Nd)(t)values of-8.7 to-8.8.The isotopic data together with the high Mg~#(both the quartz diorite and granodiorite have Mg~#values of>40)suggest a strong involvement of mantle materials in the genesis of the parent magmas.The possible petrogenetic process may be that the ascending of melts from partial melting of metasomatized mantle wedge triggered by dehydration of subducted slab resulted in partial melting of the lower crust and mixed with the latter.These Early Cretaceous intrusions from the complex are older than those found in the eastern Wuntho-Popa arc in western Myanmar,eastern Himalaya,and western Yunnan which are interpreted to be related to the Neo-Tethyan subduction,and haveε_(Nd)(t),ε_(Hf)(t)values lower than the latter.On the contrary,the ages and geochemical characteristics of the Payangazu complex are consistent with some of the intrusions in the northern magmatic belt in Tibet,eastern Himalaya,and western Yunnan which are believed to be associated with the subduction of the Bangong-Nujiang Ocean crust.Thus,we propose that the Early Cretaceous intrusions in the central Myanmar are most likely related to the southward subduction of an ocean slab that was possibly an extension of the Bangong-Nujiang O

关键词： central Myanmar zircon U-Pb age isotope Early Cretaceous subduction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

重型新型冠状病毒肺炎合并慢性阻塞性肺疾病患者临床特征

引用

中南大学学报（医学版） 2022年第12期47卷 1695-1703页

作者：梁华英陆蓉莉李毅潘频华中南大学湘雅医院呼吸内科长沙410008

目的:重型新型冠状病毒肺炎(coronavirus disease 2019,COVID-19)老年患者和有慢性呼吸道基础疾病的患者预后较差,而慢性阻塞性肺疾病(chronic obstructive pulmonary disease,COPD)是最常见的慢性呼吸道疾病之一。本研究拟探讨重型COVI... 详细信息

目的:重型新型冠状病毒肺炎(coronavirus disease 2019,COVID-19)老年患者和有慢性呼吸道基础疾病的患者预后较差,而慢性阻塞性肺疾病(chronic obstructive pulmonary disease,COPD)是最常见的慢性呼吸道疾病之一。本研究拟探讨重型COVID-19合并COPD患者的流行病学特征,以期为重型COVID-19的防治提供循证医学证据。方法:回顾性分析2020年1月29日—2020年4月8日华中科技大学附属协和医院西院收治的重型COVID-19患者的临床基线特征、治疗策略、疾病进展及预后等临床资料。结果:共纳入465例重型COVID-19患者,其中男248例(53.3%),女217例(46.7%),中位年龄62.0岁。53例合并有COPD(合并COPD组)。发病时常见症状有发热(78.5%)、干咳(67.1%)、气促(47.3%)和乏力(40.9%)。与未合并COPD组(n=412)相比,合并COPD组(n=53)入院时血氧饱和度较低(90.0%vs 92.0%,P=0.014)。实验室检查显示:合并COPD组表现为较高水平的C反应蛋白、白介素-6、降钙素原、总胆红素、血尿素氮、血肌酐、脂蛋白(a)、超敏肌钙蛋白I和D-二聚体,以及较低水平的血小板、白蛋白和载脂蛋白A-I。合并COPD组的重型COVID-19患者COPD有更高的序贯器官衰竭评估评分[3.0(2.0,3.0)vs 2.0(2.0,3.0),P=0.038]和英国胸科协会改良肺炎评分[1.0(1.0,2.0)vs 1.0(0.0,1.0),P<0.001],且进展为危重型的比例更高(28.3%vs 10.0%,P<0.001),并发症更多,如脓毒症休克(15.1%vs 6.1%,P=0.034)。合并COPD组抗生素治疗(90.6%vs 77.2%,P=0.025)、无创(11.3%vs 1.7%,P<0.001)和有创机械通气(17.0%vs 8.3%,P=0.039)的需求率更高,住院天数差异无统计学意义[35.0(26.5,45.0)vs 31.0(22.0,39.0),P=0.051],但ICU入住率(17.0%vs 7.5%,P=0.021)、住院病死率(15.1%vs 6.1%,P=0.016)更高。Cox比例风险模型分析显示调整年龄和性别[校正危险比(adjusted hazard ratio,AHR)=2.38(1.30~4.37),P=0.005],调整慢性肾脏疾病、高血压和冠心病[AHR=2.63(1.45~4.77),P<0.001],以及调整有统计学意义的实验室检查[AHR=2.10(1.13~3.89),P=0.018]后,COPD是重型COVID-19患者病情进展的独立危险因素。结论:重型COVID-19合并COPD患者疾病严重程度、进展为危重型的比例、病死率更高,应采取个体化治疗策略以改善重型COVID-19患者的预后。

关键词：重型新型冠状病毒肺炎慢性阻塞性肺疾病预后严重急性呼吸综合征冠状病毒2

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

云南个旧Sn-Cu多金属矿田中酸性岩黑云母特征及其成矿意义

引用

地球化学 2023年第2期52卷 212-221页

作者：解世雄陈喜连黄文婷张健廖娟欧阳柳芸梁华英中国科学院广州地球化学研究所矿物学与成矿学重点实验室广东广州510640 中国科学院大学北京100049

Cu和Sn在中酸性岩浆作用过程中地球化学行为明显不同,少见2种类型矿床与同一岩浆作用共生。滇东南个旧Sn-Cu多金属矿田矿床和燕山期岩浆岩联系紧密, Sn-Cu共生,都达超大规模,国内外罕见。目前对个旧矿田Sn-Cu共生控制因素探讨不多。本... 详细信息

Cu和Sn在中酸性岩浆作用过程中地球化学行为明显不同,少见2种类型矿床与同一岩浆作用共生。滇东南个旧Sn-Cu多金属矿田矿床和燕山期岩浆岩联系紧密, Sn-Cu共生,都达超大规模,国内外罕见。目前对个旧矿田Sn-Cu共生控制因素探讨不多。本研究通过矿区二长岩、似斑状花岗岩及其中暗色包体和等粒状花岗岩黑云母电子探针分析,探讨区内岩浆氧逸度及挥发相组成特征,分析其与区内形成Sn-Cu组合矿床的关系。二长岩和似斑状花岗岩及其暗色包体中的黑云母为铁质黑云母,等粒状花岗岩中黑云母属于铁叶云母。似斑状花岗岩和二长岩岩浆氧逸度较高,位于HM缓冲线附近,具较高Cl/F值;等粒状花岗岩浆氧逸度低,分布在NNO缓冲线附近,具较低Cl/F值,表明个旧矿田既发育高氧化及高Cl/F值岩浆,也发育还原及低Cl/F值岩浆。高氧化、高Cl/F值岩浆演化及出溶流体有利于形成Cu矿床,而还原、富F岩浆岩的形成与演化则更有利于形成Sn矿床。因此,个旧矿田Sn-Cu共生可能与区内发育2套性质不同的岩浆系统有关。

关键词： Sn-Cu多金属矿床黑云母岩浆氧化还原状态岩浆挥发分

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：