Late Neoarchean metavolcanics and geodynamics regime in central and eastern North China Craton
文献类型：期刊论文
| 作者 | Liu ShuWen1; Bao Han1; Gao Lei1; Sun GuoZheng1; Wang Wei2; Guo RongRong3; Guo BoRan4; Fu JingHao5; Hu YaLu1; Bai Xiang6,7 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2021 |
| 卷号 | 37期号:1页码:113-128 |
| 关键词 | Late Neoarchean Metavolcanics and petrogenesis Crustal thermal state Geodynamic regime Central and eastern North China Craton |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2021.01.08 |
| 英文摘要 | Thermal state and crust- and mantle-sourced magmatism are crucial to understanding geodynamic regime of early formation and evolution of continental crust. The North China Craton ( NCC) is one of a few Archean cratons with records of Late Neoarchean ( ca. 2. 6 similar to 2. 5Ga) volcanic rocks in the world, which has important significance for revealing Late Neoarchean global crust-mantle dynamic processes. In this paper, based on our newly obtained Meso- to Neoarchean crustal thermal state and thickness, we selected 726 samples of Neoarchean meta-volcanic rocks from Central transitional zone and Eastern Block of the NCC. These samples include ultramafic rocks (i. e. komatiites, picrites and picrobasalts, 7% ) , REE-undifferentiated basalts ( similar to 14% ) , REE-differentiated basalts (similar to 27%) , boninites ( similar to 4% ) , high-Mg andesites ( similar to 12% ) , low-Mg andesites ( similar to 26%) and dacites-rhyolites ( similar to 10%) . There are obvious differences in the lithological assemblages of metamorphic volcanic rocks and their lithological proportions in different areas of the NCC. Southern Jilin and Zanhuang areas mainly developed a lot of REE-differentiated basalts, andesites and minor dacites ; Jiaodong, Dengfeng and Fuxin areas are dominated by REE-undifferentiated and -differentiated basalts with minor ande,ite, and dacites ; Eastern and northern Hebei, Wutai-Yunzhongshan, northern Liaoning, southern Liaoning and western Shandong areas are featured by REE-undifferentiated and -differentiated basalts, andesites with minor ultramafic rocks and dacites, especially by some boninites. The REE-undifferentiated and -differentiated basalts, boninites and high-Mg andesites and highMg dacites were mainly derived from partial melting of the mantle materials metasomatized by fluids and melts from subducted slabs and sediments, whereas the low-Mg andesites, dacites and other felsic volcanic rocks from either fractionation of the initial magmas or partial melting of pure crustal materials. Our studies on the thickness and thermal state of Neoarchean crust shows thin thickness and high geothermal gradient ( 18 degrees C/km) in Jiaodong area, but thick thickness and low geothermal gradient (8. 7 degrees C/km) , meeting the geothermal gradient of present-day subduction zone in eastern Hebei area. The geothermal gradients in the other areas are between those of hot subduction and modern cold subduction. Based on the above lines of evidence, we propose that plate tectonic regime had become the dominant crust-mantle dynamic mechanism in the Late Neoarchean. Though the mantle plume and plate-mantle plume interaction mechanisms might still exist in local areas, their scale and intensity significantly decreased in the Late Neoarchean. Therefore, with the decreasing mantle temperature, the Mesoarchean to Late Neoarchean transformation of mantle plume to plate subduction regimes may be an interrelated and reciprocal dynamic process, rather than a sudden transition. |
| WOS关键词 | WESTERN LIAONING PROVINCE ; U-PB GEOCHRONOLOGY ; ARCHEAN-PROTEROZOIC TRANSITION ; GRANITE-GREENSTONE BELT ; CENTRAL OROGENIC BELT ; GA CRUSTAL GROWTH ; LU-HF ISOTOPES ; VOLCANIC-ROCKS ; GEOCHEMICAL CONSTRAINTS ; PRECAMBRIAN BASEMENT |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000617906000008 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/100134]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Liu ShuWen |
| 作者单位 | 1.Peking Univ, Sch Earth & Space Sci, MOE Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China 2.China Univ Geosci, Sch Earth Sci & Resources, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 3.Northeastern Univ, Sch Resources & Civil Engn, Dept Geol, MOE Key Lab Safe Min Deep Met Mines, Shenyang 110819, Peoples R China 4.Beijing Inst Geol Mineral Resources, Beijing 100012, Peoples R China 5.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China 6.China Earthquake Adm, Inst Geol, Natl Observat & Res Stn Jilin Changbaishan Volcan, Beijing 100029, Peoples R China 7.China Earthquake Adm, Key Lab Seism & Volcan Hazards, Beijing 100029, Peoples R China 8.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu ShuWen,Bao Han,Gao Lei,et al. Late Neoarchean metavolcanics and geodynamics regime in central and eastern North China Craton[J]. ACTA PETROLOGICA SINICA,2021,37(1):113-128. |
| APA | Liu ShuWen.,Bao Han.,Gao Lei.,Sun GuoZheng.,Wang Wei.,...&Hu FangYang.(2021).Late Neoarchean metavolcanics and geodynamics regime in central and eastern North China Craton.ACTA PETROLOGICA SINICA,37(1),113-128. |
| MLA | Liu ShuWen,et al."Late Neoarchean metavolcanics and geodynamics regime in central and eastern North China Craton".ACTA PETROLOGICA SINICA 37.1(2021):113-128. |
入库方式： OAI收割
来源：地质与地球物理研究所
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