检索结果-南通市图书馆

Timing and Processes of Ore Formation in the Qingchengzi Polymetallic Orefield, Northeast China: Evidence from 40Ar/39Ar Geochronology

引用

Acta Geologica Sinica(English Edition) 2020年第3期94卷 789-800页

作者： WANG Yinzhi WANG Fei SHI Wenbei yang liekun WU Lin State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institutions of Earth Science Chinese Academy of SciencesBeijing 100029China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The Qingchengzi orefield is a large polymetallic ore concentration area in the Liaodong peninsula,northeastern China,that includes twelve Pb-Zn deposits and five Au-Ag deposits along its *** ore-forming age remains much disputed,which prevents the identification of the relationship between the mineralization and the associated *** this paper,we quantitatively present the feasibility of making ore mineral 40Ar/39Ar dating and report reliable 40Ar/39Ar ages of lamprophyre groundmass,K-feldspar and sphalerite from the Zhenzigou *** and indirect methods are applied to constrain the timing of mineralization,which plays a vital role in discussing the contribution of multistage magmatism to ore *** low-potassium sphalerite yielded an inverse isochron age of 232.8±41.5 Ma,which features a relatively large *** lamprophyre groundmasses got reliable inverse isochron ages of 193.2±1.3 Ma and 152.3±1.5 Ma,respectively.K-feldspar yielded a precise inverse isochron age of 134.9±0.9 *** four ages indicate that the mineralization is closely associated with Mesozoic ***,regarding the cooling age of the earliest Mesozoic Shuangdinggou intrusion(224.2±1.2 Ma)as the initial time of mineralization,we can further constrain the age of the sphalerite to 224–191 *** new and existing geochronological data,combined with the interaction cutting or symbiotic relationship between the lamprophyre veins and ore veins,suggest that the Pb-Zn-Au-Ag mineralization in the Qingchengzi orefield mainly occurred during three periods:the late Triassic(ca.224–193 Ma),the late Jurassic(ca.167–152 Ma)and the early Cretaceous(ca.138–134 Ma).This polymetallic deposits are shown to have been formed during multiple events coinciding with periods of the Mesozoic magmatic *** contrast,the Proterozoic magmatism and submarine exhalative and hydrothermal sedimentation in the Liaolaomo paleorift served mainly to transport and concent

关键词： 40Ar/39Ar dating mineralization ages magmatism Qingchengzi orefield Mesozoic

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

Intercalibration of international and domestic ^(40)Ar/^(39)Ar dating standards

引用

Science China Earth Sciences 2006年第5期49卷 461-470页

作者： WANG Fei HE Huaiyu ZHU Rixiang SANG Haiqing WANG Yinglan yang liekun Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

Four international standards,Ga1550,MMhb-1,Lp-6,Bern 4M,and one domesticstandard BT-1 have been *** repeated measurements on MMhb-1 with different massdemonstrate that MMhb-1 is inhomogeneous in age and its average age is 519.8 *** results of Bern4M and Lp-6 reflect that they have an invariable value of^(40)Ar*/^(39)Ar_(k)(F)and the ages weobtained are consensus with their K-Ar age:Lp-6=127.7Ma;Bern 4M=18.2 *** of BT-1 agespectra,Ca/K and Cl/K spectra as well as inverse isochrons indicate that the sample is homogeneousand invariable and keeps close chemically,with its trapped argon isotope composition close to *** dating results show that age values are reproducible and steady,total fusion age,step-heating age,plateau age and isochron age are in accord with each other within the error range(2σ).Therefore,we recommend 28.7 Ma as the calibrated age of *** also discuss the variationin neutron flux gradients of Beijing 49-2 *** was found that the neutron flux gradientvaries considerably,and more monitors(standard samples)are needed to fix the trend of *** coefficient of the 49-2 reactor that transfers the ratio of production rate of^(37)Ar_(Ca)/^(39)Ar_(K) into Ca/K ratio is *** is different from that reported earlier,2.0,which may be caused by the reconstruction of the reactor.

关键词： ^(40)Ar/^(39)Ar dating standards intercalibration 49-2 reactor

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

Laser step-heating ^(40)Ar/^(39)Ar dating on young volcanic rocks

引用

Chinese Science Bulletin 2006年第23期51卷 2892-2896页

作者： WANG Fei HE Huaiyu ZHU Rixiang yang liekun SANG Haiqing WANG Yinglan Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029 China

An attempt was made to use CO_2 laser step-heating method to date the late Pleistocene basaltic groundmass (DF-2) from Tengchong volcanic field. Among the fourteen heating steps, ten define a good inverse isochron (MSWD = 1.4) with an age of 32.2 ± 7.1 ka (2 σ).The inverse isochron also shows that the initial argon isotopic ratio is 297.1±2.0 (2σ) which is the same as the atmospheric argon at the 2σ error level. Study indicates that it is a useful means to date young volcanic groundmass with low K content by using CO_2 laser step-heating ^(40)Ar/^(39)Ar method.

关键词：二氧化碳激光步式加热玄武岩基质岩石学火山岩

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

Lasing on pyroclastic rocks:A case study of ^(40)Ar/^(39)Ar dating on Moshishan Group,eastern Zhejiang Province

引用

Chinese Science Bulletin 2008年第3期53卷 3876-3882页

作者： yang liekun WANG Fei SHEN JiaLin CHEN Rong XING GuangFu State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Nanjing Institute of Geology and Mineral Resources Nanjing 210016 China

It is difficult to date pyroclastic rocks,for almost all the dating methods,due to the multiple sources during their formation.40Ar/39Ar incremental heating results on groundmass selected from the samples show that the age spectra are meaningless ***,singe crystal total fusions of CO2 lasing on the sanidine separates could yield rational 40Ar/39Ar results and distinguish their sources in this *** on three formations of the Moshishan Group,after avoiding the exotic and altered grains by lasing on the single sanidine separate,was reported in this *** lowermost portion of the Chawan Formation gives an age of 113.7±0.3 Ma;the lower part of the Xishantou Formation was formed 116.4±0.4 Ma ago and the bottom of the Gaowu Formation took its shape at 118.4±0.4 *** new ages are much younger than the previous ones,suggesting that these thick volcanic formations had been formed in very short durations.

关键词：火山岩透长岩肌理浙江山脉

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

年轻火山岩的定年:进展与问题

引用

岩石学报 2018年第1期34卷 23-35页

作者：杨列坤王非岩石圈演化国家重点实验室中国科学院地质与地球物理研究所北京100029 中国科学院地球科学研究院北京100029 中国科学院青藏高原地球科学卓越创新中心北京100101

年轻火山岩定年对人类的起源与进化、地质年表建立、古环境演化、火山灾害、岩浆演化及地球动力学等研究非常重要。由于年轻样品放射性成因子体积累较少、大气氩含量高,微量的过剩氩极难识别,使得年轻火山岩及其沉积地层高精度定年一直... 详细信息

年轻火山岩定年对人类的起源与进化、地质年表建立、古环境演化、火山灾害、岩浆演化及地球动力学等研究非常重要。由于年轻样品放射性成因子体积累较少、大气氩含量高,微量的过剩氩极难识别,使得年轻火山岩及其沉积地层高精度定年一直是地质年代学中最具挑战性的课题之一。过去几年,年轻火山岩定年在技术上的进展主要体现在定年精度和准确度不断提升,尤其是利用新型多接收稀有气体质谱对单颗粒样品进行逐步升温^(40)Ar/^(39)Ar定年,是方法学上最重要的进展之一。本文总结了年轻火山岩^(40)Ar/^(39)Ar定年的现状、影响因素和相关定年技术及应用,以引起大家的关注和思考,共同提高我国年轻火山岩定年的技术水平。利用新型多接收质谱和创新的实验方法,通过对全球重要火山喷发事件和年轻国际标准样的研究,广泛开展实验室间的对比是提高国内^(40)Ar/^(39)Ar年代学水平并在年轻火山岩定年中取得突破的重要途径,也是当前^(40)Ar/^(39)Ar年代学研究的重要方向。

关键词： ^40Ar/^39Ar定年第四纪火山单颗粒逐步升温法多接收稀有气体质谱仪岩浆滞留时间长白山火山

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

40Ar/39Ar geochronology of Holocene volcanic activity at Changbaishan Tianchi volcano,Northeast China

40Ar/39Ar geochronology of Holocene volcanic activity at Cha...

引用

中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： liekun yang Fei Wang Huile Feng Lin Wu Wenbei Shi State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences

We undertook a detailed40Ar/39 Ar study of the youngest eruption material from the top of the Tianchi volcano cone, dating from the last 20 ka, in order to better understand the frequency of recent *** results show that the multi-aliquot step-lasing40Ar/39 Ar method can yield meaningful ages at this young time, even in Na sanidine(Or40 An60). Xenocrystic contamination can potentially be recognized by the signi ficant scatter in apparent ages between runs of different step-lasing experiments on sanidine derived from pumice. Sanidine that originates from the alkali lava flows is free of excess argon and reflects several reliable plateau ages from 20 ka to 5 ka in sequence. We cannot obtain a plateau age from the pumices of more recent eruptions, but with analysis of a large amount of data, we are able to derive reliable inverse isochron ages of 1 ka and 4 ka, respectively. Our research shows that the Changbaishan Volcano has been more active in the last 20 ka than previously thought;and therefore, the volcano may pose hazards that have previously been underappreciated. The small difference between the40Ar/39 Ar ages calculated here and previous Uranium-series ages obtained from the same section suggests a short residence time for the Tianchi volcano, in which the time between crystallization and eruption was brief.

关键词： 40Ar/39Ar dating Millennial volcanic ejecta Holocene Changbaishan volcano

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Paleomagnetic study of Late Paleozoic rocks in the Tacheng Basin of West Junggar(NW China): Implications for the tectonic evolution of the western Altaids

Paleomagnetic study of Late Paleozoic rocks in the Tacheng B...

引用

中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Zhiyu Yi Baochun Huang Wenjiao Xiao liekun yang Qingqing Qiao State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics of the Chinese Academy of Sciences Key Laboratory of Orogenic Belt and Crust Evolution Ministry of Education School of Earth and Space Sciences Peking University Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences

To better understand the tectonic evolution of West Junggar in the western Altaids, we have conducted a combined paleomagnetic and geochronological study on Late Devonian(D), Late Carboniferous(C) and Early Permian(P) successions from the Tacheng Basin, northwest of China. Both primary and secondary characteristic remanent magnetization components have been successfully isolated and yield three reliable paleomagnetic poles of C and Late Permian(P) ages. The C and P poles reveal a significant clockwise rotation of 35.6°± 10.4° which is comparable to the rotation deduced in the western part of the Chingiz Range during the time interval C to P. Similar rotation patterns for the two units suggest that the Chingiz–West Junggar has remained as a quasi-rigid block by the P time and constituted the northeast limb of the Kazakhstan *** differential rotation of ca. 25° to 30° deduced between the northeast and middle limbs of the Kazakhstan Orocline further suggests that at least a part of the curvature of the Balkhash Arc was acquired during the C to P interval and was a continuation of the middle Paleozoic oroclinal bending. Moreover, the C poles for West Junggar and the Junggar Block are significantly different while the P ones almost overlap supporting the view that final closure of the Balkhash–Junggar Ocean occurred during the C to P interval. On the other hand, a large-scale counterclockwise rotation of ca. 80° to 90° is observed in West Junggar and Junggar relative to the western part of the Chingiz Range since the P time, and this rotation probably represents an important intracontinental deformation within the western part of the Altaids. A reconstruction of the Paleo-Asian Ocean has been proposed in which the Kazakhstan Orocline was emphasized by using the paleomagnetic results and geological evidence.

关键词： Paleo-Asian Ocean Kazakhstan Orocline West Junggar Paleomagnetism Tectonic rotation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Rapid cooling of the Yanshan Belt, northern China: Constraints from 40Ar/39Ar thermochronology and implications for cratonic lithospheric thinning

Rapid cooling of the Yanshan Belt, northern China: Constrain...

引用

中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Lin Wu Fei Wang Wei Lin Qingchen Wang liekun yang Wenbei Shi Huile Feng State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences University of Chinese Academy of Sciences

The Yanshan Orogenic Belt is located in the northern part of the North China Craton(NCC), which lost 120 km of lithospheric mantle during Phanerozoic tectonic reactivation. Mesozoic magmatism in the Yanshan fold-and-thrust belt began at 195–185 Ma(Early Jurassic), with most of the granitic plutons being Cretaceous in age(138–113 Ma). Along with this magmatism, multi-phase deformational structures, including multiple generations of folds, thrust and reverse faults, extensional faults, and strike-slip faults are present in this belt. Previous investigations have mostly focused on geochemical and isotopic studies of these magmatic rocks, but not on the thermal history of the Mesozoic plutons. We have applied40Ar/39 Ar thermochronology to biotites and K-feldspars from several Lower Cretaceous granitic plutons to decipher the cooling and uplift history of the Yanshan region. The biotite40Ar/39 Ar ages of these plutons range from 107 to 123 Ma, indicating that they cooled through about 350 °C at that time. All the K-feldspar step-heating results modeled using multiple diffusion domain theory yield similarly rapid cooling trends, although beginning at different times. Two rapid cooling phases have been identified at ca.120–105 and 100–90 Ma. The first phase of rapid cooling occurred synchronously with widespread extensional deformation characterized by the formation of metamorphic core complexes, A-type magmatism, large-scale normal faults, and the development of half-graben basins. This suggests rapid exhumation took place in an extensional regime and was a shallow-crustal-level response to lithospheric thinning of the NCC. The second phase of rapid cooling was probably related to the regional uplift and unroofing of the Yanshan Belt, which is consistent with the lack of Upper Cretaceous sediments in most of the Yanshan region.

关键词： Cretaceous plutons Rapid cooling events 40Ar/39Ar thermochronology Crustal thinning Yanshan Belt North China Craton

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

^(40)Ar/^(39)Ar热年代学现状与问题

引用

地质科学 2010年第3期45卷 905-916页

作者：吴林杨列坤师文贝王非中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029 中国科学院研究生院北京100049 中国地质大学(北京) 北京100083

Ar同位素体系定年矿物的封闭温度范围广,并且可以获得650℃～150℃温度段的非线性冷却历史,因此^(40)Ar/^(39)Ar热年代学成为研究地质体热演化历史过程中最有效的工具之一。但是由于矿物中Ar同位素扩散机制还有一些问题没有清楚地被认识... 详细信息

Ar同位素体系定年矿物的封闭温度范围广,并且可以获得650℃～150℃温度段的非线性冷却历史,因此^(40)Ar/^(39)Ar热年代学成为研究地质体热演化历史过程中最有效的工具之一。但是由于矿物中Ar同位素扩散机制还有一些问题没有清楚地被认识,因此在一定程度上制约了^(40)Ar/^(39)Ar热年代学的发展。本文介绍了目前应用最广泛的两种^(40)Ar/^(39)Ar热年代学模式:多重扩散域模式和多路径扩散模式,讨论了它们的发展现状、存在的问题、可能解决的方法以及今后的发展方向。

关键词：封闭温度 40Ar/39Ar热年代学多重扩散域模式多路径模式

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

Metamorphic chronology of the Zagros orogenic belt: Past achievements and prospects

Metamorphic chronology of the Zagros orogenic belt: Past ach...

引用

2023年中国地球科学联合学术年会

作者： Behzad Monfaredi Fei Wang Franz Neubauer Farzaneh Shakerardakani Lin Wu Yinzhi Wang Zhiyong Zhang liekun yang Institute of Geology and Geophysics Chinese Academy of Sciences Department of Biodiversity and Environment Paris-Lodron-University of Salzburg Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences

Petrochronology of the various stages of mono- and polymetamorphism play a key role for understanding the tectonic evolution of metamorphic belts, which occur in central sectors of collisional orogenic belts, and which are fingerprinted by burial, heating, exhumation, and cooling events. The Sanandaj-Sirjan zone (SSZ), known as the most internal, metamorphic core of the Asian collision zone at the extent of Iran, is a striking example.

关键词： Metamorphic chronology of the Zagros orogenic belt Past achievements and prospects

来源： cnki会议评论

在线全文

cnki会议

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：