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Science China Earth Sciences 2024年第9期67卷 2824-2844页

作者： Hongyu WANG shuanhong zhang Sen WANG Linghao KONG Yue ZHAO Qiqi zhang Sen GAO Guohui HU Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Paleomagnetism and Tectonic Reconstruction Ministry of Natural ResourcesBeijing 100081China SinoProbe Laboratory Chinese Academy of Geological SciencesBeijing 100037China School of Earth Science and Mineral Resources China University of GeosciencesBeijing 100083China

The Great Oxidation Event(GOE)during the early Paleoproterozoic represents the first significant buildup in Earth’s atmospheric oxygen and resulted in a series of significant changes in the Earth’s surface *** them is the 2.22(or 2.33)–2.06 Ga Lomagundi-Jatuli Event(LJE),which is globally,the largest magnitude and longest duration,marine carbonate positive carbon isotope excursion(δ^(13)C_(V-PDB)>10‰)*** event has attracted the attention of scholars all over the ***,except for a high positive carbon isotope excursion(δ^(13)C_(V-PDB)>10‰)recently identified from marine carbonate rocks within the Daposhan Formation in the lower Fanhe Group(or the Sanchazi Group)in the Longgang Block in the northeast North China Craton(NCC),Paleoproterozoic carbonates in the NCC are characterized by a low-amplitude positive carbon isotope excursion(δ^(13)C_(V-PDB)10‰)of marine carbonate rocks occurred at about 2.15 *** co

关键词： Lomagundi-Jatuli Event(LJE) Great Oxidation Event(GOE) Carbon-oxygen isotopes Liaohe Group Marine carbonate Jiao-Liao-Ji Belt North China Craton

辽北地区克拉通与造山带边界的限定:来自晚古生代-早中生代花岗质岩石锆石Hf同位素证据

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地质学报 2024年第6期98卷 1715-1731页

作者：张琪琪张拴宏赵越胡国辉中国地质科学院地质力学研究所北京100081 自然资源部古地磁与古构造重建重点实验室北京100081

华北地块北缘主要由北侧白乃庙弧带和南侧华北克拉通组成,尽管白云鄂博-多伦-赤峰-开原断裂被认为是克拉通与造山带边界,但在辽北地区该断裂带的具体位置并不明确。华北克拉通与白乃庙弧不同的基底属性和演化历史导致了两大构造单元内... 详细信息

华北地块北缘主要由北侧白乃庙弧带和南侧华北克拉通组成,尽管白云鄂博-多伦-赤峰-开原断裂被认为是克拉通与造山带边界,但在辽北地区该断裂带的具体位置并不明确。华北克拉通与白乃庙弧不同的基底属性和演化历史导致了两大构造单元内岩浆岩(主要为中酸性岩石)具有不同的Nd-Hf同位素组成。本文以辽北地区广泛出露的晚古生代—早中生代花岗质岩石为研究对象,通过对其进行年代学和Hf同位素研究,以此来限定辽北地区克拉通与造山带的边界位置。研究结果表明:位于白乃庙弧与华北克拉通北缘之上的石炭纪和二叠纪—早三叠世花岗质岩石锆石Hf同位素组成具有明显差异,具体表现为前者ε_(Hf)(t)值均为正值且平均地壳模式年龄T^(C)_(DM)普遍小于1.0Ga,后者ε_(Hf)(t)值均为负值且平均地壳模式年龄T^(C)_(DM)普遍大于2.2Ga。尽管中三叠世花岗质岩石锆石Hf同位素组成变化范围较大且有少量区域重合,但总体上仍表现出不同的特征。本文通过对比辽北地区石炭纪-中三叠世花岗质岩石锆石Hf同位素组成,结合太古宙-古元古代变质结晶基底岩系的分布范围,初步限定了辽北地区古老克拉通(华北克拉通)与年轻造山带(白乃庙弧)的边界位置:阜新北约60km-彰武西南部-新民北部-法库南部-铁岭西部-开原东部-清河断裂。

关键词：华北克拉通白乃庙弧克拉通与造山带边界花岗质岩石锆石Hf同位素

从华北燕辽岩床群到哥伦比亚超大陆巨型裂谷系——燕辽大火成岩省近20年研究回顾与展望

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地质学报 2024年第3期98卷 783-798页

作者：张拴宏赵越裴军令杨振宇胡国辉张琪琪中国地质科学院地质力学研究所北京100081 自然资源部古地磁与古构造重建重点实验室北京100081 东华理工大学地球科学学院江西南昌330013 首都师范大学资源环境与旅游学院北京100048

近20年的研究工作表明,华北克拉通北部燕辽地区侵入到中元古代沉积地层中的大规模辉绿岩床群构成了一个1.32 Ga的基性大火成岩省。该大火成岩省与华北克拉通西北缘白云鄂博矿区富稀土-铌火成碳酸岩相伴生。大火成岩省、沉积地层对比和... 详细信息

近20年的研究工作表明,华北克拉通北部燕辽地区侵入到中元古代沉积地层中的大规模辉绿岩床群构成了一个1.32 Ga的基性大火成岩省。该大火成岩省与华北克拉通西北缘白云鄂博矿区富稀土-铌火成碳酸岩相伴生。大火成岩省、沉积地层对比和古地磁资料研究结果表明,燕辽大火成岩省与北澳大利亚克拉通代理姆-加里温库大火成岩省是被大陆裂解分割开来的同一个基性大火成岩省的组成部分,显示1.8~1.3 Ga期间华北克拉通北-北东缘与北澳大利亚克拉通北缘在哥伦比亚(奴那)超大陆中长期相邻(连)。全球1.4~1.3 Ga大火成岩省及基性岩浆活动的时空分布及其岩石学、地球化学及同位素组成对比研究显示,这些全球广泛分布的大火成岩省或基性岩浆活动主要形成于裂谷环境。结合1.4 Ga左右哥伦比亚超大陆古地理重建结果,发现在哥伦比亚超大陆中存在沿劳伦(北美+格陵兰)克拉通西缘、西伯利亚克拉通西缘及北缘、波罗地克拉通东南缘、西非克拉通西缘及北缘、亚马逊克拉通西南缘、刚果/圣弗朗西斯科克拉通南缘及东缘、卡拉哈里克拉通东缘、华北克拉通北缘及北澳大利亚克拉通北缘分布,长度>15000 km的巨型裂谷系。该巨型裂谷系由一个主裂谷带和三个分支裂谷组成,其中主裂谷带和位于华北与北澳大利亚克拉通之间的分支裂谷发展成了大洋,并导致了大陆分离;而位于西伯利亚东缘、格陵兰北缘和波罗地东缘的1.38 Ga分支裂谷,以及位于北美北缘和西伯利亚西南缘的1.35~1.32 Ga分支裂谷则为夭折裂谷,未导致大陆裂离。这一巨型裂谷系是哥伦比亚超大陆裂解的重要标志,并可能是其最终裂解的最主要原因。另外,研究结果也显示,虽然全球两个最大规模的火成碳酸岩型稀土矿床,即华北克拉通西北缘的白云鄂博超大型稀土矿床和北美克拉通西缘的Mountain Pass超大型稀土矿床在哥伦比亚超大陆中并不相邻(相连),但却可以通过1.4~1.3 Ga巨型裂谷系相联系起来,显示这一巨型裂谷系控制了白云鄂博和Mountain Pass大型稀土矿床的形成,并具有较好的稀土及金属成矿潜力。未来需要进一步加强燕辽辉绿岩床群侵位机制与岩浆补给系统,岩床侵位过程中温室气体排放量定量估算及其环境效应,哥伦比亚超大陆中1.4~1.3 Ga巨型裂谷系的形成机制、深部动力学背景、环境效应及资源能源潜力等方面的研究。

关键词：基性岩床群大火成岩省超大陆裂解古地理重建哥伦比亚超大陆华北克拉通

LA-ICP-MS石榴子石U-Pb定年方法在异剥钙榴岩和矽卡岩年代学研究中的应用

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地球学报 2024年第3期45卷 386-396,I0001-I0004页

作者：王森张拴宏蔡梦颖申佳奇张琪琪杨静中国地质科学院地质力学研究所北京100081 自然资源部古地磁与古构造重建重点实验室北京100081 中国地质调查局极地地学研究中心北京100081 中国地质大学(北京) 北京100083

本文利用Coherent GeoLas HD型193 nm ArF准分子激光剥蚀系统和Agilent 7900型四极杆电感耦合等离子体质谱仪,建立了LA-ICP-MS石榴子石U-Pb定年方法。利用该方法,对采自冀北地区晚古生代镁铁质-超镁铁质混杂岩体中的异剥钙榴岩和闽西南... 详细信息

本文利用Coherent GeoLas HD型193 nm ArF准分子激光剥蚀系统和Agilent 7900型四极杆电感耦合等离子体质谱仪,建立了LA-ICP-MS石榴子石U-Pb定年方法。利用该方法,对采自冀北地区晚古生代镁铁质-超镁铁质混杂岩体中的异剥钙榴岩和闽西南马坑式铁矿含矿石榴子石矽卡岩这两种岩石中的石榴子石开展U-Pb定年研究。在冀北地区晚古生代镁铁质-超镁铁质混杂岩体中的异剥钙榴岩中,获得石榴子石下交点年龄为(387.6±5.4) Ma (D496-1, MSWD=1.1, N=30)和(409.3±7.8) Ma (D493-1, MSWD=2.0, N=60),在马坑铁矿石榴子石矽卡岩中,获得石榴子石下交点年龄为(128.6±2.1) Ma (ZK7921-b24, MSWD=2.0, N=60)和(128.7±3.2)Ma(ZK7922-b1,用锆石91500校正,MSWD=1.8,N=42);在潘田铁矿的石榴子石矽卡岩中,获得石榴子石的下交点年龄为(128.7±1.7)Ma (PT-b1, MSWD=1.7, N=30)和(132.1±1.3) Ma(PT-b1样品,用锆石91500校正,MSWD=1.6,N=30)(除了指明使用锆石标样91500校正石榴子石未知样品外,其他皆用石榴子石标样Willsboro校正石榴子石未知样品的U/Pb分馏)。以上结果与Sm-Nd等时线年龄及前人报道的锆石U-Pb年龄在误差范围内一致。对马坑式铁矿石榴子石矽卡岩U-Pb定年结果表明,利用石榴子石标样Willsboro和锆石标样91500作为外标样校正同一样品中石榴子石U/Pb同位素分馏,获得的下交点年龄一致,206Pb/238U年龄的加权平均值也一致,说明石榴子石与锆石之间的基体效应较小,在缺乏石榴子石标样时,可用锆石标样91500代替。在上述研究基础上分析了石榴子石U-Pb定年方法在矽卡岩型矿床成矿时代研究及异剥钙榴岩年代学研究中的应用潜力,认为石榴子石U-Pb定年方法在矽卡岩型矿床及异剥钙榴岩年代学研究中具有巨大的应用推广前景,具有重要的理论指导和实际应用意义。

关键词：石榴子石锆石 U-Pb定年 LA-ICP-MS 异剥钙榴岩矽卡岩

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Discovery of Contact Metamorphism-Related Baddeleyite from the Bayan Obo Deposit,Northern North China Craton

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Acta Geologica Sinica(English Edition) 2017年第2期91卷 729-730页

作者： zhang shuanhong ZHAO Yue Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Paleomagnetism and Tectonic Reconstruction Ministly of Land and ResourcesBeijing 100081China

Objective Baddeleyite （ZrO~） occurs primarily as an accessory mineral in igneous rocks with low silica activity and has been widely used to determine crystallization ages of mafic- ultramafic rocks and alkaline rocks including carbonatites and kimberlites. The Bayan Obo deposit on the northern margin of the North China Craton （NCC） is the world＇s largest REE deposit. Many previous studies show that the main component of ore-hosting dolomite marble is magmatic in origin and the REE-Nb mineralization is closely related to the carbonatites in the Bayan Obo deposit. This study attempted to separate baddeleyite from the REE- Nb-rich carbonatites in the Bayan Obo deposit to determine their crystallization ages in order to better understand the timing, genesis and tectonic setting of this deposit.

关键词： Th REE

Numerical Modeling of Deformation at the Baiyun Gold Deposit,Northeastern China:Insights into the Structural Controls on Mineralization

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Journal of Earth Science 2021年第1期32卷 174-184页

作者： Xiangchong Liu Changhao Xiao shuanhong zhang Bailin Chen Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Laboratory of Dynamic Diagenesis and Metallogenesis Institute of GeomechanicsChinese Academy of Geologi-cal SciencesBeijing 100081China Key Laboratory of Paleomagnetism and Tectonic Reconstruction Ministry of Natural ResourcesBeijing 100081China

The Qingchengzi ore field is an important gold-polymetallic center of the North China *** has been recognized that the gold deposits in Qingchengzi were controlled by structures like litho-logical interfaces and fractures along mechanically weak bedding and foliation planes,but it still remains poorly understood how the structures affected the localization of the gold *** element based numerical modeling was used to reproduce the deformation process of the Baiyun gold deposit during the mineralization *** schist and marble are widely exposed in Qingchengzi,and a large part of the Baiyun gold ores occurs along the interfaces between the schist and the *** modeling results suggest that the mechanical contrast between the schist and the marble may be a major reason why the stress was localized along their lithological interfaces under a compressional stress *** parts of their lithological interfaces were identified to be easily stress-localized and first fractured:the interface between the schist and its underlying marble at shallower levels and the one between the schist and its overlying marble at deeper *** concentration in these two parts is independent on the dipping angle and direction of the ***,mineralizing fluids may have been concentrated into these two *** first one is consistent with the present ore bodies of the Baiyun gold deposit,and the second one could be considered for deep *** findings also provide implications for the structural controls of lithological interfaces on the mineralization in other gold deposits of this region.

关键词： Baiyun gold deposit Qingchengzi numerical modeling lithological interfaces mechanical contrast

Formation of the Giant Bayan Obo Deposit by ca. 1.3 Ga Carbonatitic Magmatism and its Link with Continental Rifting in the Columbia Supercontinent

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Acta Geologica Sinica(English Edition) 2016年第S1期90卷 195-196页

作者： zhang shuanhong ZHAO Yue LIU Yongsheng Institute of Geomechanics Chinese Academy of Geological Sciences Key Laboratory of Paleomagnetism and Tectonic Reconstruction Ministry of Land and Resources State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences

The Bayan Obo in the northern North China Craton is the world’s largest light rare earth element(LREE)deposit and the largest niobium(Nb)and thorium(Th)deposit in China(e.g.,Wu,2008;Kynicky et al.,2012;Ling et al.,

关键词： REE Formation of the Giant Bayan Obo Deposit by ca

Exploring the relevance between load-bearing capacity and surface friction behavior based on a layered hydrogel cartilage prototype

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Friction 2024年第8期12卷 1757-1770页

作者： Yunlei zhang Weiyi ZHAO Xiaoduo ZHAO Jinshuai zhang Bo YU shuanhong MA Feng ZHOU State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Shandong Laboratory of Yantai Advanced Materials and Green Manufacture Yantai Zhongke Research Institute of Advanced Materials and Green Chemical EngineeringYantai 264006China

Cartilage is well lubricated over a lifetime and this phenomenon is attributed to both of the surface hydration lubrication and the matrix load-bearing *** hydrogels with a layered structure are designed to mimic cartilage as potential *** many studies have concentrated on improving surface hydration to reduce friction,few have experimentally detected the relationship between load-bearing capacity of hydrogels and their interface friction *** this work,a bilayer hydrogel,serving as a cartilage prototype consisted of a top thick hydrated polymer brush layer and a bottom hydrogel matrix with tunable modulus was designed to investigate this *** coefficient of friction(COF,μ)is defined as the sum of interfacial component(μInt)and deformation/hysteresis component(μHyst).The presence of the top hydration layer effectively dissipates contact stress and reduces the interface interaction(μInt),leading to a stable and low *** contribution of mechanical deformation(μHyst)during the sliding shearing process to COF can be significantly reduced by increasing the local mechanical modulus,thereby enhancing the load-bearing *** results show that the strategy of coupling surface hydration layer with a high load-bearing matrix can indeed enhance the lubrication performance of hydrogel cartilage prototypes,and implies a promising routine for designing robust soft matter lubrication system and friction-control devices.

关键词： soft contact hydration,deformation load-bearing friction control

The Confirmation of the Neoproterozoic Langshan Group in Inner Mongolia and Its Significance

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Acta Geologica Sinica(English Edition) 2015年第1期89卷 318-319页

作者： HU Jianmin GONG Wangbin ZHAO Yue zhang shuanhong WU Sujuan QU Hongjie LI Zhenhong LIANG Xia Institute of Geomechanics Chinese Academy of Geological Sciences

There is a large Mesoproterozoic rift at the northern margin of North China Craton （NCC）, and one of China＇s most important metallogenic belts, the Langshan-Zhaertai Shan-Bayan Obo mesoproterozoic metallogenic belt is just located in this rift. This metallogenic belt contains some large or ultra-large ore deposits, such as the Bayan Obo iron deposits and ultra-large rare earth deposits, and the large Dongshengmiao Cu-Pb-Zn sulphide deposits.

关键词： In NCC The Confirmation of the Neoproterozoic Langshan Group in Inner Mongolia and Its Significance

CHARACTERIZATION OF DEFORMATION AND X-RAY PETROFABRICS IN THE MIDDLE PART OF THE WAHONGSHAN FAULT ZONE, QINGHAI PROVINCE, NORTHWESTERN CHINA

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Geotectonica et Metallogenia 2004年第1期28卷 53-65页

作者： zhang shuanhong ZHOU Xianqiang Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China

The Wahongshan fault zone in Qinghai province is one of the most important faults in western China. In this paper, deformation and X-ray petrofabrics have been studied in the middle segment of the fault. The results show that the formation of the fault zones can be divided into two major stages: ductile shear deformation stage and brittle deformation stage. The early stage ductile shearing leads to the formation of the NW-NNW trending mylonite zones along the fault, which is intensely cut by the late-formed brittle faults. X-ray petrofabrics of rocks near the faults indicate that the minerals in the tectonites show a great degree of orientation in the alignment. The quartz, which is a very important mineral in the tectonites, is deformed by basal face gliding or near basal face gliding, and sometimes by prismatic face sliding, which indicates that the rocks are deformed in epithermal to mesothermal or mesothermal environment, and the dynamic recrystallization also plays an important role in the formation of the quartz alignment. The results also demonstrate that plutons formed in the Hercynian and Indosinian stages show no great ductile deformation as can be seen from the X-ray petrofabrics, so it is concluded that these rocks are formed after the formation of the ductile shear zones. Results of Structural deformation analysis and isotope geochronologic analysis of syntectonic muscovite indicate that Wahongshan ductile shear zones are formed in the late Silurian Period during the late Caledonian stage.

关键词： structural deformation X-ray petrofabric Wahongshan fault zones Qinghai the TibetPlateau