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New Discovery of ～2.65 Ga Tonalitic Gneiss in the Southern Jilin Province, China

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Acta Geologica Sinica(English Edition) 2018年第5期92卷 2046-2047页

作者： li pengchuan liU Zhenghong XU Zhongyuan DONG Xiaojie li Shichao College of Earth Sciences Jilin University

Objective The North China Craton（NCC）is almost continuously widespread TTGs of 3.8–2.5 Ga,and the intrusive peak appears at^2.53 Ga,indicating that the Neoarchean is the most important period of continental growth in the NCC（Wan Yusheng et al.,2017）.Recently studies reveal that the TTGs were formed during-2.7 Ga and 2.6–2.5 Ga in southern Jilin Province,NE of the NCC（Wang Chaoyang et al.

关键词： New Discovery of MS Th Pb NCC China

Discovery of a ~1.37 Ga Granite in the Eastern Part of the Northern Margin of the North China Craton and its Geological Significance

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Acta Geologica Sinica(English Edition) 2020年第2期94卷 563-564页

作者： WEN Kai SUN Guosheng liU Zhenghong XU Zhongyuan li pengchuan College of Earth Sciences Jilin UniversityChangchun 130061JilinChina

Diabase sills with baddeleyite/zircon U-Pb ages of-1.32 Ga have been found in many areas of the North China Craton(NCC)(Peng,2015).Some researchers have proposed that this magmatic event should be related to the breakup of the Columbia supercontinent.A few studies have reported this period of granitoids only to be present in the Shangdu,*** Sonid Zuoqi areas(Zhang et al.,2012;Sun *** et al..2018).This study concerns the first discovery of a-1.37 Ga granite in the southern Jilin Province,in the eastern part of the northern margin of the *** has great significance for the study of the breakup of the Colombia supercontinent,the magmatism of the NCC,and the relationship between the supercontinent and other continents during this period.

关键词： Eastern continent Craton

Detrital Zircon U–Pb Geochronology and Provenance of Bayan Obo Group, Northern Margin of North China Craton: New Implications for the Position of NCC in Rodinia

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Acta Geologica Sinica(English Edition) 2019年第5期93卷 1397-1416页

作者： li Changhai liU Zhenghong XU Zhongyuan DONG Xiaojie li pengchuan SHI Qiang WANG Shijie College of Earth Sciences Jilin UniversityChangchun 130001China Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Natural ResourcesChangchun 130026China

The paleoposition of North China Craton in Rodinia has long been in controversial. This paper mainly focuses on the U-Pb geochronological studies of detrital zircons obtained from Bayan Obo Group exposed in the Shangdu area, Inner Mongolia, aiming to provide more information for interprating this problem. Based on the acquired data, this paper comes to the following conclusions. Firstly, the depositional age of Bayan Obo Group might be from Meso- to Neoproterozoic according to the zircons U-Pb dating results. The lower succession of this group, namely Dulahala and Jianshan formations deposited between 1800 and 1650 Ma. The Halahuogete and Bilute formations deposited between 1500 and 1350 Ma. For Baiyinbaolage and Hujiertu formations, their depositional age was 1250-900 Ma. Secondly, for the provenance of Bayan Obo Group, this paper believes detrital zircons with age of 2.51-2.71 Ga and 2.00-2.48 Ga were from Guyang, Xi Ulanbulang and Zhuozi area;the Khondalite Belt provided detrital zircons with age of 1.95-1.80 Ga;zircons with age of 1.60-1.75 Ga might come from granitic rocks in Miyun Area. The magmatism after 1.60 Ga was rarely recorded in the NCC, therefore those zircons with ages younger than 1.60 Ga might come from outside of NCC. The magmatism with the same age existed in Baltic, Amazonia and Laurentia. Based on previous paleomagnetic researches, this paper proposes that NCC might receive detritus from Baltic during 1560-1350 Ma and had affinity with Laurentia and Amazonia at ~0.9 Ga in Rodinia. Baltic, Amazonia and Laurentia might be potential provenances for non-NCC detritus in Bayan Obo Group.

关键词： North China Craton Precambria Bayan Obo Group detrital zircons Rodinia

Zircon U-Pb geochronology,geochemistry and tectonic implication of volcanic rocks from Manketouebo Formation in Keyihe area of northern Great Xing'an Range

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Global Geology 2023年第3期26卷 133-145页

作者： JIA Jinfeng WANG Yang li pengchuan College of Earth Sciences Jilin UniversityChangchun 130061China Jinan Municipal Engineering Construction Group Jinan 250000China Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Natural ResourcesChangchun 130061China

Zircon U-Pb isotope dating and whole-rock geochemical analyses were undertaken for the rhyolite,rhyolitic lithic crystal tuff and dacitic tuff from the Manketouebo Formation in the Keyihe area,in order to constrain their genesis and tectonic *** LA-ICP-MS U-Pb data indicate that the rhyolite and rhyolitic lithic crystal tuff were formed during 137±5 Ma and 143±1 Ma,*** volcanic rocks have high SiO2(70.03%–76.46%)and K2O+Na2O(8.10%–9.52%)contents,but low CaO(0.03%–0.95%)and MgO(0.07%–0.67%)contents,which belong to the peraluminous and high-K calc-alkaline *** are enriched in light rare earth elements(REEs),and exhibit fractionation of light over heavy REEs,withδEu values of 0.37–*** volcanic rocks are enriched in liLEs(e.g.,Rb,U and K)and depleted in HFSEs(e.g.,Nb,Ti,P and Ta).The chemical composition suggests that these volcanic rocks formed by partial melting of crust *** with previous regional research results,the authors consider that the volcanic rocks of the Manketouebo Formation in the Keyihe area were formed under an extensional environment related to the closure of the Mongolia–Okhotsk Ocean.

关键词： Manketouebo Formation zircon U-Pb geochronology geochemistry Great Xing’an Range

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800MN液压机飞机起落架锻模再制造

兵器装备工程学报 2018年第3期39卷 151-156页

作者：李蓬川中国第二重型机械集团德阳万航模锻有限责任公司四川德阳618013

采用双金属梯度堆焊方法对800MN液压机飞机起落架锻模再制造,建立起落架锻件成形过程粘塑性有限元模型和锻模承压弹塑性有限元模型,分析锻模温度场、应力场及磨损分布。结合实际使用后的失效状态,设计出该锻模型腔各部位双金属梯度堆焊... 详细信息

采用双金属梯度堆焊方法对800MN液压机飞机起落架锻模再制造,建立起落架锻件成形过程粘塑性有限元模型和锻模承压弹塑性有限元模型,分析锻模温度场、应力场及磨损分布。结合实际使用后的失效状态,设计出该锻模型腔各部位双金属梯度堆焊层材料和厚度,通过锻模修复与再制造,生产结果表明:采用该方法再制造的锻模在生产6件产品后锻模桥部及型腔基本无变形,锻件质量合格,生产成本大大降低,工程应用价值十分显著。

关键词： 800MN液压机再制造锻模生产应用

华北克拉通东北部新太古代晚期地壳生长:来自板石沟表壳岩年代学和Hf同位素的证据

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岩石学报 2016年第9期32卷 2839-2855页

作者：李鹏川郭巍关庆彬刘杰勋吉林大学地球科学学院长春130061

对板石沟表壳岩中的斜长角闪岩和角闪片岩进行了锆石U-Pb年代学、地球化学以及Hf同位素分析,以探讨华北克拉通东北部新太古代晚期的构造环境和地壳演化。板石沟表壳岩主要岩石类型包括斜长角闪岩、斜长片麻岩、角闪片岩和磁铁石英岩,LA-... 详细信息

对板石沟表壳岩中的斜长角闪岩和角闪片岩进行了锆石U-Pb年代学、地球化学以及Hf同位素分析,以探讨华北克拉通东北部新太古代晚期的构造环境和地壳演化。板石沟表壳岩主要岩石类型包括斜长角闪岩、斜长片麻岩、角闪片岩和磁铁石英岩,LA-ICP-MS锆石U-Pb测年显示斜长角闪岩(BA-1)岩浆锆石形成于2548±11Ma,绿帘角闪片岩(BA-6)岩浆锆石形成于2548±23Ma,代表了表壳岩的形成时代,在绿帘角闪片岩中识别出3颗年龄为2754±80Ma^2710±92Ma的捕获锆石,表明板石沟地区可能存在新太古代早期岩浆事件。斜长角闪岩和角闪片岩的原岩为玄武质火山岩,微量元素特征指示其形成于岛弧环境。Hf同位素分析结果显示斜长角闪岩εHf(t)为正值(0.29~8.89),单阶段模式年龄(tDM1)分布在2877~2469Ma之间,绿帘角闪片岩多具正的εHf(t)值(-0.78~8.03),tDM1介于2871~2544Ma,表明岩浆主要来源于亏损地幔,伴随少量古老地壳物质的再造,部分tDM1与207Pb/206Pb年龄相近,并同时具有高εHf(t)值的锆石反映板石沟地区新太古代晚期(2550Ma)发生过地壳增生事件。结合其他地区表壳岩研究成果,认为华北克拉通可能存在新太古代吉-辽-冀弧陆碰撞造山带,板石沟地区属于该造山带的一部分。

关键词：华北克拉通新太古代晚期板石沟表壳岩锆石U-Pb年龄 Hf同位素地壳增生

兴蒙造山带南缘东段和龙地区Ⅰ型花岗岩锆石U-Pb定年、地球化学特征及其地质意义

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岩石学报 2016年第9期32卷 2690-2706页

作者：关庆彬李世超张超时溢李鹏川吉林大学地球科学学院长春130061 山东理工大学资源与环境工程学院淄博255049 沈阳地质矿产研究所沈阳110034

本文对兴蒙造山带南缘东段和龙地区八家子岩体和勇新岩体进行了岩相学、地球化学、LA-ICP-MS U-Pb定年和Sr-Nd同位素研究,以便制约该区的区域构造演化。锆石测年结果显示,八家子石英闪长岩结晶年龄为257.8±0.9Ma,形成于晚二叠世早期,... 详细信息

本文对兴蒙造山带南缘东段和龙地区八家子岩体和勇新岩体进行了岩相学、地球化学、LA-ICP-MS U-Pb定年和Sr-Nd同位素研究,以便制约该区的区域构造演化。锆石测年结果显示,八家子石英闪长岩结晶年龄为257.8±0.9Ma,形成于晚二叠世早期,勇新二长花岗岩的结晶年龄为243.2±1.1Ma和238.5±2.8Ma,形成于中三叠世。八家子石英闪长岩为钠质钙碱系列、偏铝质的Ⅰ型花岗岩类,富集轻稀土(LREEs)和大离子亲石元素(liLEs,Cs、Ba、K和Sr),亏损重稀土(HREEs)和高场强元素(HFSEs,Nb、Ta和P),结合Sr-Nd同位素特征显示其为壳源成因,形成于俯冲环境下,是玄武质下地壳部分熔融的产物。勇新二长花岗岩富硅、铝和钾,为高钾钙碱性系列、偏铝质-弱过铝质的Ⅰ型花岗岩,富集轻稀土(LREEs)及大离子亲石元素(liLEs,Cs、K、Sr),亏损重稀土(HREEs)和高场强元素(HFSEs,Nb、Ta、P和Ti),结合Sr-Nd同位素特征显示其为壳源成因,形成于同碰撞环境下,是玄武质下地壳部分熔融的产物。花岗岩的侵位反映了研究区晚二叠世早期古亚洲洋板块俯冲于华北克拉通之下,中三叠世华北克拉通与兴凯地块碰撞拼合,说明古亚洲洋应闭合于晚二叠世末期-早三叠世期间。

关键词：兴蒙造山带南缘 Ⅰ型花岗岩锆石U-Pb测年地球化学古亚洲洋

基于数值模拟的飞机超高强度钢前起外筒模锻件制造

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锻压技术 2021年第9期46卷 277-283页

作者：李蓬川张睿中国第二重型机械集团德阳万航模锻有限责任公司四川德阳618013

通过物理边界测定试验,确定了300M钢材料的热辐射系数、与模具的热交换系数和摩擦因数;在同一规格棒材上切取试样,完成了热模拟压缩试验,获得了300M超高强度钢的应力-应变曲线;将物理边界参数和应力-应变曲线导入到有限元模拟软件中,建... 详细信息

通过物理边界测定试验,确定了300M钢材料的热辐射系数、与模具的热交换系数和摩擦因数;在同一规格棒材上切取试样,完成了热模拟压缩试验,获得了300M超高强度钢的应力-应变曲线;将物理边界参数和应力-应变曲线导入到有限元模拟软件中,建立了与实际生产工况高度吻合的数值模拟仿真空间。通过全流程的数值模拟技术对坯料成形过程和模锻成形过程进行不断地迭代优化,精准预测了前起外筒模锻件的成形过程,锻件料工比控制在1.2以内,控制了材料消耗,制定出3火次制坯和2火次模锻的短流程工艺方案。锻件一次试制成功,实现了飞机前起外筒模锻件的短流程的稳定制造,获得了外形尺寸合格、组织性能优良的高品质产品。

关键词： 300M超高强度钢飞机起落架模锻成形

大兴安岭中段早三叠世O型埃达克岩的发现及其大地构造意义

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地球科学 2017年第12期42卷 2117-2128页

作者：李世超张凌宇李鹏川施璐郑常青吉林大学地球科学学院吉林长春130061 沈阳地质矿产研究所辽宁沈阳110034

为了研究大兴安岭中段地区早三叠世的构造背景问题,以下三叠统哈达陶勒盖组火山岩为研究对象,通过野外观测和X射线荧光光谱分析法、等离子质谱法分别对样品的主量、微量元素进行了测试.结果显示哈达陶勒盖组火山岩是一套中酸性钙碱系列... 详细信息

为了研究大兴安岭中段地区早三叠世的构造背景问题,以下三叠统哈达陶勒盖组火山岩为研究对象,通过野外观测和X射线荧光光谱分析法、等离子质谱法分别对样品的主量、微量元素进行了测试.结果显示哈达陶勒盖组火山岩是一套中酸性钙碱系列岩石组合,具有高Sr、低Yb与Y和高Sr/Y的特点,为钠质(O型)埃达克岩.结合区域资料认为,古亚洲洋于早三叠世时期闭合的碰撞应力使贺根山-嫩江-黑河构造带活化,推动构造带内年轻地壳由南向北俯冲,进而推动古生代残留洋壳向更深的地幔插入,在此过程中加热并熔融、喷出地表形成哈达陶勒盖组埃达克岩,并在山间盆地沉积了湖相碎屑堆积-老龙头组.

关键词：早三叠世 O型埃达克岩哈达陶勒盖组大兴安岭中段地球动力学岩石学