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Science china Earth Sciences 2004年第10期47卷 896-911页

作者： ZHANG Changhou1,2, WU Ganguo1,2, WANG Genhou2, ZHANG Weijie2 & SONG Honglin2 1. key laboratory of Lithospheric Tectonics and Lithoprobing Technology, china {3. of Geosciences, ministry of education of china, beijing 100083. china 2. School of Earth Sciences and Mineral Resources, china {3. of Geosciences, beijing 100083. china key laboratory of Lithospheric Tectonics and Lithoprobing Technology China University of Geosciences Ministry of Education of China Beijing China School of Earth Sciences and Mineral Resources China University of Geosciences Beijing China

The northwest trending tectonic belt in the middle part of the Mesozoic intraplate Yanshan orogenic Belt, northeast Hebei Province, is composed of thrusts, extensional faults, strike-slip faults and syntectonic sedimentations as well. The northeastward basement-involved major thrusting deformation occurred between 174Ma and 168MaBP and was followed by an intrusion of the granitic plutonic rocks. As a part of the post-thrusting extensional deformations a northwest extending volcano-sedimentation system of Late Jurassic and Early Cretaceous formed in the southwest side of the belt. These volcano-sedimentary sequences are divided into Tuchengzi Formation, Zhangjiakou Formation, Yixian Formation and Jiufotang Formation re- spectively. They are characterized by southeastward migration as a result of the increasing down-dip slip displacement along the major extensional fault toward the southeast of the belt. The provenance area of the Jiufotang Formation north to it experienced southwestward thrusting during and after its later sedimentation. The thrusting in this stage resulted in the formation of an asymmetric footwall syncline with vergence to SW in the Jiufotang Formation in the NE side of the basin. Finally a dextral strike-slip deformation occurred along the NW tectonic belt. The striking tectono-geomorphological features and present seismic activities along this belt indicate that it has been being active since Cenozoic era and is still in the active state at present. This northwest extending tectonic belt was following the same direction and location as the existing fault systems within the basement as revealed by former geological and geophysical studies. So it is reasonable to infer the Mesozoic deformation along this belt to be a result of reactivation of the basement structures in a favorable tectonic stress field. The reactivation of basement struc- tures might be taken as one of the mechanisms of intraplate deformation and orogeny.

关键词： Yanshan orogenic Belt, northwest extending tectonic complex, thrust system, geochronology.

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The Sequence of Magmatic-Tectonic Events and orogenic Processes of the Yanshan Belt, North china

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Acta Geologica Sinica(English Edition) 2004年第1期78卷 260-266页

作者： DENG Jinfu, SU Shangguo, MO Xuanxue, ZHAO Guochun, XIAO Qinghiu, JI Guangyi,QIU Ruizhao, ZHAO Hailing, LUO Zhaohua, WANG Yang and LIU Cui china university of Geosciences, beijing 100083.and {3. laboratory of Lithospheric Tectonics and Lithoprobe Techniques, ministry of education of china china Univ Geosci Beijing 100083 Peoples R China Minist Educ china Key Lab Lithospher Tecton & Lithoprobe Tech Beijing 100083 Peoples R China

This paper emphasizes that the interactive constraints of geology and isotopic dating is the best approach to construct the geological event sequence, and has compiled 106 data of reasonable isotopic ages for the igneous rocks of the Yanshan belt. We propose a sequence of mgmatic-tectonic events in the Jurassic-Cretaceous Yanshan orogen of North china. Five orogenic episodes are divided, (1) pre-and initial orogenic episode (Early Jurassic); (2) early orogenic episode (Middle Jurassic); (3. peak orogenic episode (Late Jurassic); (4) late orogenic episode (early Early Cretaceous), and (5) post-orogenic episode. Each episode is a short cycle, all of the orogenic processes construct a longer cycle, and they, in general, followed a counter-clockwise (ccw) PTt path. Finally, it is suggested that the Yanshanian movement was so intensive that the magmatism and tectonic deformation had involved all the lithosphere thickness and the late-Achaean-formed cratonic lithosphere had been significantly reworked.

关键词： magmatic-tectomc event sequence Yanshan belt orogenic episodes and processes

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Nd isotopic characteristics of Proterozoic metasedimentary rocks and constraints on their provenance in the eastern segment of Central Tianshan Belt, Xinjiang

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Progress in Natural Science:Materials International 2003年第12期 28-33页

作者： LI Qiugen 1, LIU Shuwen 1*, HAN Baofu 1, ZHANG Jian 1 and CHU Zhuyin 2(1. The key laboratory of orogenic {3. and Crustal Evolution, ministry of education, School of Earth and Space Sciences, peking university, beijing 100871, china 2. Institute of geology and Geophysics, Chinese Academy of Sciences, beijing 100029, china) The key laboratory of orogenic {3. and Crustal Evolution Ministry of Education School of Earth and Space Sciences Peking University Beijing 100871 China Institute of geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

Sm Nd isotopic characteristics, ε Nd ( t ) values and Nd model ages ( T DM ) of Proterozoic metasedimentary rocks in the eastern segment of Central Tianshan Belt (ESCTB), Xinjiang, are used to constrain the sedimentary provenance as well as to evaluate their tectonic implications. ε Nd ( t ) and T DM values of these samples range from -4.00 to +6.3. and from 1.29 to 2.29 Ga, respectively. These feature values are distinguished from those of Archean Tarim Craton. Their average ε Nd ( t ) values of the Weiya, the Kumishi and the south to the Dikar samples are -2.46, +2.06 and +1.3., respectively. Nd model ages of the Weiya samples vary between 1.86 and 2.29 Ga , but those of the Kumishi and the south to the Dikar samples show a significant concentration at 1.6～1.9 Ga and the youngest Nd model age is 1.29 Ga. Those Nd isotopic characteristics suggest that these metasedimentary rocks could be derived from a significant proportion of Paleoproterozoic crustal source and a participation of young arc materials, rather than Archean Tarim Craton. Furthermore, the data also indicate that these two sources were paleogeographically separated. Thus we can deduce that the Kumishi and the south to the Dikar metasedimentary rocks were formed proximal to the arc side of the back arc basin, but the Weiya metasedimentary rocks were closer to the continental side of the back arc basin.

关键词： Nd isotopic features metasedimentary rocks Xingxingxia group provenance and forming time Tectonic setting the ESCTB of Xinjiang.

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Contrasting Provenance of Late Archean Metasedimentary rocks from the Wutai Complex, North china Craton: Detrital zircon U-Pb, Sm-Nd and geochemical data

Contrasting Provenance of Late Archean Metasedimentary rocks...

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2006年全国岩石学与地球动力学研讨会

作者： Qiugen Li, Shuwen Liu , Zongqi Wang , Zhuyin Chu , Biao Song , Yanbin Wang , Chaohui Liu, Shengqiang Yu & Tao Wang ( Institute of geology, Chinese Academy of Geological Sciences, beijing 10003., People '' s Republic of china The {3. laboratory of orogenic belts and Crustal Evolution, ministry of education, School of Earth and Space Sciences, peking university, beijing 100871, People '' s Republic of china Geological and Geophysical Institute, Chinese Academy of Sciences, beijing 100029, People '' s Republic of china )

＜正＞Sedimentary rocks are principal proxies for past conditions on the Earth’s surface, and may provide the available clues to trace the nature of old crustal development, when the original source rocks are not longer preserved due to decomposition and erosion （Gao and Wedepohl, 1995;Yamashita and Creaser, 1999）. Furthermore, geochemical method is increasingly applied as a

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基于流域单元的泥石流区域危险性评价

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山地学报 2006年第2期24卷 177-180页

作者：王晓朋潘懋徐岳仁北京大学造山带与地壳演化教育部重点实验室北京大学造山带与地壳演化教育部重点实验室北京大学地球与空间科学学院北京100871

进行泥石流区域危险性评价时,首先要选取合适的单元作为评价单元。在前人的研究成果中已有多种评价单元,如栅格单元、斜坡单元、单一条件单元等。作者认为国内评价工作中常采用的栅格单元、行政区划单元都没有体现泥石流发生特定的地貌... 详细信息

进行泥石流区域危险性评价时,首先要选取合适的单元作为评价单元。在前人的研究成果中已有多种评价单元,如栅格单元、斜坡单元、单一条件单元等。作者认为国内评价工作中常采用的栅格单元、行政区划单元都没有体现泥石流发生特定的地貌条件,故提出以流域为评价单元的思路。根据水文学D8方法,介绍了在计算机协助下基于DEM数据自动完成流域单元划分的方法,并以辽宁省鞍山市岫岩满族自治县作为实例,将全区划分为1024个流域单元。将流域划分结果与历史灾害点位置相对比,每个流域内基本上只包含一个灾害点,该情况说明流域划分精度满足研究工作需要。在此基础上利用人工神经网络进行泥石流区域危险性评价。结果显示,以流域作为评价单元能充分体现泥石流发生的地貌特征和物理机制,利于评价指标取值,而且危险性结果与实际情况吻合较好,可为政府部门制定减灾防灾决策提供参考。

关键词：泥石流区域危险性评价流域单元

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The history of crustal uplift and metamorphic evolution of Panzhihua-Xichang micro-palaeoland, SW china:Constraints on Sm-Nd, ^(40)Ar/^(3.)Ar and FT ages of granulites

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Science china Earth Sciences 2004年第8期47卷 689-703页

作者： XU Shijin1, LIU Wenzhong1, WANG Rucheng1, YU Hangbo1, LI Daming2, WAN Jinglin2 & FANG Zhong1 1. department of Earth Sciences and State key laboratory for Mineral Deposits Research, Nanjing {3., Nanjing 210093. china 2. Institute of geology, china Seismological Bureau, beijing 100029, china department of Earth Sciences and State key laboratory for Mineral Deposits Research Nanjing University Nanjing China Institute of geology China Seismological Bureau Beijing China

Panzhihua-Xichang (Panxi) micro-palaeoland is the oldest terrane on the western margin of the Yangtze Block. Some intermediate-basic granulites are considered to be the crys-talline basement of lower crust in the terrane. Granulite-facies metamorphism of the granulites was developed in the period from 1186 Ma to 1128 Ma. The origin of granulites was related to the collision orogenic process occurring when the micro-palaeolands merged to form the Rodinia Supercontinent. Amphibolite-facies retrogressive metamorphism of granulites took place in the period from 877 Ma to 825 Ma. This period was consistent with the breakup time of the Rodinia Supercontinent. 40Ar/3.Ar ages and fission track (FT) ages of granulites in the Panxi mi-cro-palaeoland show that the vertical movement history of crustal rocks was a slow uplift process of the rigid terrane in the time from Neoproterozoic to Mesozoic. The subduction of India Plate towards Euroasia Plate resulted in the rapid uplift of the Qinghai-Tibetan Block in Cenozoic. Meanwhile, the Qinghai-Tibetan Block moved towards east. Consequently the Panxi terrane was uplifted rapidly. As a result of the collision orogeny between the Qinghai-Tibetan Block and the Panxi terrane, the granulite-facies crystalline basement in this region was exhumed and exposed to the surface.

关键词： granulite,isotope geochronology,crustal uplift movement,Panzhihua-Xichang region,western margin of Yangtze Block.

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Petroleum Migration Direction of the Silurian Paleo-pools in the Tarim Basin, Northwest china

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Acta Geologica Sinica(English Edition) 2008年第1期82卷 174-183页

作者： LIU Luofu ZHAO Yande HUO Hong CHEN Lixin CHEN Yuanzhuang ZHAO Suping LI Chao LI Shuangwen GUO Yongqiang LI Yan key Lab for Hydrocarbon Accumulation Mechanism in the china university of Petroleum,{3. of education Basin and Reservoir Research Center, china university of Petroleum,beijing 102249, china china Univ Petr Key Lab Hydrocarbon Accumulat Mech Minist Educ Beijing 102249 Peoples R China china Univ Petr Basin & Reservoir Res Ctr Beijing 102249 Peoples R China

The results obtained in this paper indicate that carbazole-type compounds have high thermal stability and also show stability in oxidation and bio-degradation. This kind of compounds still has a high concentration and complete distribution in the analyzed dry asphalt samples, showing that they are particularly useful in studying petroleum migration of paleo-pool. During the basin＇s first-stage of oil-gas pool formation in the Silurian in Tazhong and Tabei areas of Tarim Basin （at the end of Silurian period） and the second-stage in the Awati area （in Permian）, the petroleum experienced a long-distance migration. During the formation of the Silurian paleo-pools in Tazhong Uplift at the end of Silurian, the petroleum mainly came from the lower and middle Cambrian source rocks in the Manjiaer sag. The petroleum migrated towards the southwest-south entering the Silurian reservoir beds in Tazhong first. Then, it further migrated within Silurian from northwest to southeast along the highs of the Structural belts to the region of the Silurian pinchout boundary in Tazhong. In Tabei Uplift, during the first-stage of pool formation, the petroleum was also from the lower and middle Cambrian source rocks in the Manjiaer sag. It migrated northwest entering the Silurian reservoir beds in the Tabei Uplift firstly, and then the migration continued in the same direction within the Silurian reservoirs and finally the petroleum was trapped in higher positions. During the second-stage pool formation in the Silurian beds in the areas around Awati sag, the petroleum mainly came from the lower-middle Cambrian source rocks in the Awati sag. The petroleum migrated from the generation center to Silurian reservoirs in all directions around the sag through major paths, and the petroleum was finally trapped in higher locations.

关键词： nitrogen pyrrolic compound carbazole petroleum migration Paleo-poois Silurian Tarim Basin

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Geochemistry of the high-Mg andesites at Zhangwu, western Liaoning: Implication for delamination of newly formed lower crust

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Science china Earth Sciences 2007年第12期50卷 1773-1786页

作者： HUANG Hua1,GAO Shan1,2,HU ZhaoChu1,LIU XiaoMing2 & YUAN HongLing2 1 State key laboratory of Geological Processes and Mineral Resources,china {3. of Geosciences,Wuhan 43.074,china 2 State key laboratory of Continental Dynamics,department of geology,Northwest {3.,Xi’an 710069,china State key laboratory of Geological Processes and Mineral Resources China University of Geosciences Wuhan China State key laboratory of Continental Dynamics Department of Geology Northwest University Xi’an China

Ten volcanic samples at Zhangwu,western Liaoning Province,North china were selected for a sys-tematic geochemical,mineralogical and geochronological study,which provides an opportunity to ex-plore the interaction between the continental crust and mantle beneath the north margin of the North china *** one basalt sample(SiO2= 50.23.),the other nine samples are andesitic with SiO2 contents ranging from 53. to 59%.They have relatively high MgO(3.4%―6.1%,Mg#=50―64) and Ni and Cr contents(Ni 27×10?6―197×10?6,Cr 51×10?6―478×10?6).Other geochemical characteristics of Zhangwu high-Mg andesites(HMAs) include strong fractionation of light rare earth elements(LREE) from heavy rare earth elements(HREE),and Sr from Y,with La/Yb greater than 15,and high Sr/Y(3.― 115).Zircons of andesite YX270 yield three age groups with no Precambrian age,which precludes ori-gin of the Zhangwu HMAs from the partial melting of the Precambrian *** oldest age group peaking at 253.Ma is interpreted to represent the collision of the Siberia block and the North china block,resulting in formation of the Central Asian {3. belt by closure of the Mongol-Okhotsk *** intermediate age group corresponds to the basalt underplating which caused the wide-spread coeval granitoids in the North china craton with a peak 206Pb/23.U age of 172 *** youngest age group gives a 206Pb/23.U age of 126±2 Ma,which is interpreted as the eruption age of the Zhangwu *** high 87Sr/86Sri(126 Ma)>0.706 and low εNd(t)= ?6.3.―?13.99 of the Zhangwu HMAs are distinct from slab *** common presence of reversely zoned clinopyroxene phenocrysts in the Zhangwu HMAs argues against the origin of the Zhangwu HMAs either from melting of the water saturated mantle or melting of the lower *** light of the evidence mentioned above,the envisaged scenario for the formation of the Zhangwu HMAs is related to the basaltic underplating at the base of the crust,which led to the thickening of the lower crust and

关键词： Zhangwu HMAs, basalt underplating, newly formed lower crust, delamination, North china craton

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Tectono-chronologic constraints on a Mesozoic slip and thrust belt in the eastern Jiaodong Peninsula

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Science china Earth Sciences 2007年第1期50卷 25-32页

作者： ZHANG HongYuan1,2, HOU QuanLin3.& CAO DaiYong 4 1 Institute of geology, Chinese Academy of Geological Sciences, beijing 10003., china 2 State {3. laboratory of Geological Processes and Mineral Resources, china university of Geosciences, beijing 100083. china 3.Graduate School of china Acacemy of Sciences, beijing 10003., china 4 {3. laboratory of Coal Resources (CUMT), ministry of education, beijing 100083. china Institute of geology Chinese Academy of Geological Sciences Beijing 100037 China State key laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China Graduate School of china Acacemy of Sciences Beijing 100039 China key laboratory of Coal Resources (CUMT) Ministry of Education Beijing 100083 China

A major slip and thrust belt within the eastern Jiaodong Peninsula is located at the eastern terminal of the Qinling-Dabie-Sulu orogenic belt between the Sino-Korea Block and Yangtze Block. Although a lot of isotope chronologic data have been obtained regionally, little structural chronological research has been conducted in this region and this paper corrects that. Syn-deformational minerals were system-atically selected from samples of the NE-ENE trending transpressional shear zones and transpres-sional nappes and carefully analysed using 40Ar/3.Ar methods. Two tectonic events were defined with the first event resulting from early movement of transpressional nappes around 190 Ma ago. This ac-cords with the period of syn-orogenic sinistral slip of the Tan-Lu faults and clockwise shear in the Eastern Qinling-Tongbaishan part of the Qinling-Dabie-Sulu orogenic belt. The second event involved strikeslip thrust movement of deep shear zones between 13.Ma and 120Ma. This resulted from the onset of Mesozoic tectonic conversion in the eastern Jiaodong Peninsula. The sinistral strikeslip-thrusting in Jiaodong Peninsula and the extensional tectonism (toward ESE) in Liaodong Peninsula probably resulted in the clockwise rotation of Korea Peninsula in late Mesozoic.

关键词： the eastern Jiaodong Peninsula tectono-chronology 40Ar/3.Ar strikeslip and thrust belt.

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An Archean continental block in the Taihangshan and Hengshan regions: Constraints from geochronology and geochemistry

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Progress in Natural Science:Materials International 2002年第8期 10-18页

作者： LIU Shuwen , LI Jianghai, PAN Yuanming, ZHANG Jian and LI Qiugen(1. The key laboratory of orogenic {3. and Crustal Evolution, School of Earth and Space Sciences, peking university, beijing 100871, china 2. department of Geological Sciences, university of Saskatchewan, Saskatoon, SK S7N 5E2, Canada) The key laboratory of orogenic {3. and Crustal Evolution School of Earth and Space Sciences Peking University Beijing 100871 China department of Geological Sciences University of Saskatchewan Saskatoon SK S7N 5E2 Canada

Recent research on the tectonothermal evolution and geochronology in the Fuping, Hengshan and Wutaishan metamor-phic complexes, together with the discoveries of a high-pressure granulite belt in the northern margin of the North china Craton (NCC) and high-pressure metapelites in the Jingangku Group of the Wutaishan complex, suggests that there was a Neoarchean to Paleoproterozoic orogenic belt related to collision between the Eastern and Western continental blocks. Comparison of geological, geochronological, tectonothermal and geochemical data between the Fuping and Hengshan complexes suggests these two complexes most likely originated and evolved as a single lithotectonic domain (i.e., the Taihangshan-Hengshan block) during the early evolution of the North china Craton, probably as an active margin to the Eastern Continental Block. The Taihangshan-Hengshan block has been subjected to intensive and extensive tectono-magmatism and high-grade metamorphism related to collision between the Eastern and Weste

关键词： Fuping-Hengshan metamorphic complexes North china Craton geochronological and geochemical evidence Archean continental block collision.

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