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Geochronological and geochemical constraints on the granitic gneiss in the Huozhou Complex: implications for the tectonic evolution of the trans-north china orogen

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Acta Geochimica 2023年第1期42卷 153-181页

作者： Chong Peng Haiyan Liu Ruiying Zhang Cremilda Samuel Jofrisse Linfu Xue Baozhi Pan College of Geographical Sciences Shanxi Normal UniversityTaiyuan 030031China Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China College of Earth Sciences Jilin UniversityChangchun 130061China School of GeoSciences University of EdinburghEdinburgh EH93JWUK

The trans-north china orogen is a major Neoarchean Paleoproterozoic collisional orogenic belt above the north china Craton, formed due to prolonged and complex processes. Even though many NeoarcheanPaleoproterozoic magmatic and metamorphic activities have been reported, due to the Huozhou Complex’s small outcropping range, little attention has been paid to the origin of various igneous rocks of the Huozhou Complex in the center of the trans-north china orogen. The Huozhou Complex, located south of the Luè liang, Wutai, and Hengshan complexes, is an important window into the Early Precambrian structure and evolution of the north china Craton. Its magma and metamorphism are crucial to understanding the development of the structural evolution of the trans-north china orogen. The Huozhou metamorphic complex area exposes a range of Precambrian metamorphic rocks, among which the most extensively dispersed is felsic biotite plagioclase gneiss. In this study comprehensive geological field survey, micropetrology,chronology, geochemistry, and Hf isotope analysis were carried out for the Qinggangping and Anziping gneiss in the north of the Huozhou Complex. The results show that the magmatic zircon age of the Qinggangping gneiss is2196 ± 14 Ma, and its protolith is I-type granite, formed by partial melting of igneous rocks in the absence of weathering. Its source is mainly the juvenile crust from depleted mantle dating 2431–2719 Ma, with a small amount of mantle-derived material. The Anziping gneiss has a metamorphic zircon age of 1931 ± 13 Ma with an S-type granite protolith belonging to peraluminous granite.The Anziping gneiss is formed by recycling pre-existing crustal components at 2613–2848 Ma. A minor quantity of mantle-derived magma is also introduced to the crust simultaneously. The samples of Qinggangping gneiss and Anziping gneiss show the characteristics of obvious negative Nb, Ti, and P elements in the spider diagram of primitive mantle standardization. This implies that the rocks have the characteristics of magm

关键词： Zircon U–Pb dating Geochemistry Huozhou complex trans-north china orogen Biotite plagioclase gneiss north china craton

Crustal density structures and isostasy beneath the Western north china craton,trans-north china orogen,and surrounding regions

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Geoscience Frontiers 2020年第2期11卷 569-580页

作者： Min Gao Djordje Grujic Qiu-Ming Cheng School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China State Key Lab of Geological Processes and Mineral Resources China University of GeosciencesBeijing 100083China Department of Earth Sciences Dalhousie UniversityHalifaxB3H 4R2Canada

To determine the lateral and vertical variations in crustal structure and their influence on the seismicity of the Western north china Craton,the trans-north china orogen,and the surrounding regions,the wavelet multi-scale structures,Moho depth,crustal density structures,and isostatic state are modelled using Bouguer gravity anomaly data,topography,and earthquake focal mechanisms.We obtained homogeneous crustal densities and deviations ofnorthern and central Taihang Uplift is thin and under-compensated.The heterogeneous crustal densities and non-isostatic state beneath the Tibetan Plateau and Qinling Central china orogen indicate that these two blocks are unstable in the vertical and lateral directions.Although Cenozoic deformation of the north china Craton is thought to be driven by lithospheric stresses related to the India-Eurasia collision and Pacific slab retreat in South East Asia,we suggest that gravitational potential energy created by the heterogeneous crustal structure modulates these first-order forces.The results of this study could constrain the causes of seismicity in systems surrounding the Ordos Block.

关键词： Western north china craton trans-north china orogen Bouguer gravity anomaly Crustal density structure Gravitational potential energy

U-Pb Zircon Dating of the Granitic Conglomerates of the Hutuo Group:Affinities to the Wutai Granitoids and Significance to the Tectonic Evolution of the trans-north china orogen

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Acta Geologica Sinica(English Edition) 2006年第6期80卷 886-898页

作者： Jian ZHANG Guochun ZHAO LI Sanzhong Min SUN LIU Shuwen Xiaoping XIA Yanhong HE Department of Earth Sciences The University of Hong Kong Pokfulam Road Hong Kong College of Marine Geosciences Ocean University of China Qingdao Shandong 266003 School of Earth and Space Sciences Peking University Beijing 100871

The Wutai Complex associated with the adjacent Fuping and Hengshan Complexes represents the best and dassical cross-section in the middle segment of the trans-north china orogen, generally divided into Eastern and Western Blocks. Unconformably overlying the Wutai and Fuping Complexes is the Hutuo Group considered as the youngest lithostratigraphic unit in the region and important both for interpreting Precambrian history as well as the overall evolution of the trans-north china orogen. Lack of knowledge about provenance of the sedimentary rocks in this group has hindered understanding of the depositional environments and tectonic significance. LA-ICP-MS was applied to obtain U-Pb zircon ages for the granitic pebbles, the lowest lithostratigraphic rock of the Hutuo Group, which, combined with previous lithostratigraphic, geochronological, structural and metamorphic data, provides new constraints on the sedimentary provenance and tectonic evolution of the region. The sequence of the Hutuo Group ranges upward from lower basal conglomerates and volcaniclastic rocks （Doucun Subgroup）, through clastic sediments, slates, dolomites and marbles （Dongye Subgroup）, to sandstones and conglomerates at the top （Guojiazhai Subgroup）. Zircons from granitic pebbles preserved in the Doucun Subgroup basal conglomerates give weighted mean ^207pb/^206pb ages between 2517 Ma and 2566 Ma, which are the same as those for the late Archean Wutai Granitoids, indicating that the pebbles were derived from the Wutai granitic intrusions （2566-2515 Ma）. Based on the new data and previous studies, combined with an igneous zircon crystallization age of 2087±9 Ma obtained for volcanics in the Hutuo Group, the Hutuo Group was deposited in a subduction-related retro-arc foreland basin environment that developed behind the Wutai arc during the eastward-directed subduction of the Western Block beneath the western margin of the Eastern Block. This basin underwent long-lived sedimentation and finally closed during the -1850 Ma collisional event that res

关键词： trans-north china orogen Paleoproterozoic Wutai Complex Hutuo Group conglomerates

Guandishan Granitoids of the Paleoproterozoic Lüliang Metamorphic Complex in the trans-north china orogen:SHRIMP Zircon Ages,Petrogenesis and Tectonic Implications

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Acta Geologica Sinica(English Edition) 2009年第3期83卷 580-602页

作者： LIU Shuwen LI Qiugen LIU Chaohui LU Yongjun ZHANG Fan The Key Laboratory of orogenic Belts and Crustal Evolution MOE School of Earth and Space Sciences Peking University Beijing 100871 China

The Paleoproterozoic Liiliang Metamorphic Complex （PLMC） is situated in the middle segment of the western margin of the trans-north china orogen （TNCO）, north china Craton （NCC）. As the most important lithological assemblages in the southern part of the PLMC, Guandishan granitoids consist of early gneissic tonalities, granodiorites and gneissic monzogranites, and younger gneissic to massive monzogranites. Petrochemical features reveal that the early gneissic tonalities and granodiorites belong to the medium-K calc-alkaline series; the early gneissic monzogranites are transitional from high-K calc-alkaline to the shoshonite series; the younger gneissic to massive monzogranites belong to the high-k calc-alkaline series, and all rocks are characterized by right- declined REE patterns and negative Nb, Ta, Sr, P, and Ti anomalies in the primitive mantle normalized spidergrams. SHRIMP zircon U-Pb isotopic dating reveals that the early gneissic tonalities and granodiorites formed at -2.17 Ga, the early gneissic monzogranites at -2.06 Ga, and the younger gneissic to massive monzogranites at -1.84 Ga. Sm-Nd isotopic data show that the early gneissic tonalities and granodiorites have eNd（t） values of ＋0.48 to -3.19 with Nd-depleted mantle model ages （TDM） of 2.76--2.47 Ga, and early gneissic monzogranites have eNd（t） values of -0.53 to -2.51 with TDM of 2.61--2.43 Ga, and the younger gneissic monzogranites have eNd（t） values of -6.41 to -2.78 with a TDM of 2.69--2.52 Ga.These geochemical and isotopic data indicate that the early gneissic tonalities, granodiorites, and monzogranites were derived from the partial melting of metamorphosed basaltic and pelitic rocks, respectively, in a continental arc setting. The younger gneissic to massive monzogranites were derived by partial melting of metamorphosed greywackes within the continental crust. Combined with previously regional data, we suggest that the Paleoproterozoic granitoid magmatism in the Guandishan granitoids of the PLMC may provide the best geological signature for th

关键词： Guandishan granitoid petrogenesis SHRIMP zircon geochronology geochemistry Ndisotopes Paleoproterozoic Liiliangshan Complex trans-north china orogen north china craton.

Tectonic setting and significance of 2.3-2.1 Ga magmatic events in the trans-north china orogen:New constraints from the Yanmenguan mafic-ultramafic intrusion in the Hengshan-Wutai-Fuping area

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Tectonic setting and significance of 2.3-2.1 Ga magmatic eve...

Paleoproterozoic Potassic Granitoids in the Sushui Complex from the Zhongtiao Mountains,northern china:Geochronology,Geochemistry and Petrogenesis

中国科学院地质与地球物理研究所第十届(2010年度)学...

作者： Simon A.Wilde Department of Applied Geology Curtin University of TechnologyGPO BoxU1987PerthWA 6845Australia

A detailed study of the～2.2 Ga Yanmenguan mafic-ultramafic intrusion in the Hengshan area is presented with the aim of clarifying the tectonic history of the trans-north china orogen in the north china Craton during the period 2.3-2.1 Ga.SHRIMP U-Pb dating of magmatic zircons from a gabbro indicates emplacement at～2193 Ma.The whole rock and mineral geochemistry of this intrusion are akin to Alaskan-type complexes,and are typical of subduction-related magmas.The parental magma likely originated from the depleted mantle wedge above a subduction zone,and experienced fractional crystallization of olivine and clinopyroxene.The continental arc,represented by the mafic-ultramafic intrusions and contemporary granitic and volcanic rocks,together with the Liiliang back-arc basin constitute a marginal arc-back-arc basin system that evolved between 2.3 and 2.1 Ga.Based on geochronological datasets and available data on magmatism,metamorphism and structural deformation,a comprehensive new tectonic model for the evolution of the TNCO during the Neoarchean to Paleoproterozoic is constructed:(1)～2.5Ga intra-oceanic arc-back-arc basin system and its accretion at the end of the Neoarchean;(2)a long hiatus in magmatism and tectonism between～2.5 and 2.3 Ga;(3)～2.3-2.1 Ga marginal arc-back-arc basin magmatism developed in the accreted Hengshan-Wutai-Fuping arc terranes and the Liiliang terrane;(4)～2.1 Ga collision,resulting in closure of the～2.3-2.1 Ga Liiliang back-arc basin,accretion of the Liiliang-Hengshan-Wutai-Fuping arc terranes,and their attachment to the Western Block of the north china Craton;(5)the intrusion of～1970-1910Ma post-collisional mafic dykes in an extensional event;(6)final collision between the Western and Eastern Blocks between～1.9 and 1.8 Ga,resulting in extensive magmatism,tectonism and metamorphism;and lastly(7)post-1.8 Ga crustal extension.

关键词： Mafic-ultramafic intrusion Marginal arc-back-arc basin ～2.3-2.1 Ga events trans-north china orogen north china Craton

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Acta Geologica Sinica(English Edition) 2006年第6期80卷 875-885页

作者： TIAN Wei LIU Shuwen ZHANG Huafeng Key Laboratory of orogenic Belt and Crustal Evolution of the Ministry of Education School of Earth and Space Sciences Peking University Beijing 100871 State Key Laboratory of Geo-Processes and Mineral Resources China University of Geosciences Beijing 100083

Paleoproterozoic potassic granitoids in the southern Sushui Complex from the Zhongtiao Mountains yielded SHRIMP zircon U-Pb ages of 1968-1944 Ma. Lithologically, the potassic granitoid series consists chiefly of monzodiorite, quartz monzonite and syenogranite. Their trace elements and Sm-Nd isotope characteristics indicate that they were derived from partial melting of Archean TTG rocks in an overthickened continental crust. Petrogenesis of this potassic granitoid series implies a collisional environment within the trans-north china orogen in the Paleoproterozoic, which supports a tectonic model of Eastern and Western Continental Blocks being amalgamated in the Paleoproterozoic.

关键词： Sushui Complex Zhongtiao Block trans-north china orogen potassic granitoid zircon U-Pb Sm-Nd isotope Paleoproterozoic

Zircon SHRIMP geochronology and geochemistry of TTG rocks in Sushui Complex from Zhongtiao Mountains with its geological implications

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Progress in Natural Science:Materials International 2006年第5期16卷 492-500页

作者： TIAN Wei, LIU Shuwen, LIU Chaohui, YU Shengqiang, LI Qiugen and WANG Yueran (Key Laboratory of orogenic Belt and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, china) Key Laboratory of orogenic Belt and Crustal Evolution MOE School of Earth and Space Sciences Peking University Beijing 100871 China

The tonalite-trondhjemite-granodiorite (TTG) rocks in Sushui Complex of Zhongtiao Block can be divided into two series according to their zircon U-Pb ages and geochemical characteristics: one is subduction-related (SR) and the other collision-related (CR) . The SR TTG rocks, together with other Late Archean island arc magmatism, were developed as a result of oceanic subduction between the Eastern and Western blocks in Late Archean; while the CR TTG rocks formed in a thickened crustal environment, which was responding to the collision between the Eastern and Western blocks in Paleoproterozoic. All these features support a model that the Zhongtiao Block is a part of the trans-north china orogen in the middle of north china Craton.

关键词： Sushui Complex Zhongtiao Block trans-north china orogen zircon U-Pb geochronology trace element simulation.

Geochronological and geochemical constraints on the origin of clastic meta-sedimentary rocks associated with the Yuanjiacun BIF from the Lüliang Complex,north china

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Geochronological and geochemical constraints on the origin o...