The Mesozoic granitoids in the northern marginal region of North China Craton: evolution from post-collisional to anorogenic settings
文献类型：期刊论文
| 作者 | Liu, HT; Zhai, MG; Liu, JM; Sun, SH |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2002-10-01 |
| 卷号 | 18期号:4页码:433-448 |
| 关键词 | granitoids mesozoic post-collisional anorogenic North China Craton |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Based on petrological and geochemical studies, the Mesozoic granitoids out cropped in the northern marginal region of North China Craton can be grouped into five types as following: strongly peraluminous leucogranites, normal calcalkaline and high-K calc-alkaline granites, high-Sr granites, alkali A-type granites, and peralkaline granites. They are very different not only in their geochemical features, but also in age of emplacement, petrogenesis and geodynamic environment. The peraluminous leucogranites were derived from dehydration melting of metapelites and metagreywackes during uplift and decompression of the thickened crusts without any mantle involvement in the early stage of post-collisional phase. The high-Sr granites were derived from the overthickened lower crust by dehydration melting of intermediate-acid igneous rocks and basaltic amphibolites. Both alkali granites and peralkaline granites were generated in the extensional regime of regional lithosphere, but the latter indicating a rifting event of intra-plate anorogenic setting. Based on the regional geological evolution and the sequential emplacement of the granitoids, it is suggested that these granitoids imagined a transition of geodynamic environments from post-collisional to intra-plate anorogenic. The strongly peraluminous leucogranites + calcalkaline and high-K calc-alkaline granites + high-Sr granites + alkali A-type granites comprise the post-collisional granitic suite, while the peralkaline granites + alkali A-type granites constitute the intra-plate anorogenic granitic suite. The regional. granitic magmatism distinctively indicates a significant switch of regional tectonics in between 160similar to150 Ma in the Mesozoic. In the early-middle Mesozoic before 160 Ma, regional crust/lithosphere might undergo an early stage of post-collisional thickening processes, during which voluminous high-Sr granites and several strongly peraluminous leucogranites were emplaced; but during 150similar to110 Ma, the regional crust/lithosphere experienced a late post-collisional stage of strongly extensional tectonics and crustal thinning, which is characterized by the onset of emplacement of alkali A-type granites, along with the high-Sr granites became markedly insignificant and eventually disappeared. At about 110 Ma typical pealkaline granites were emplaced without any high-Sr granitic magmatism, indicating that the regional crust had been thinned to normal thickness (38similar to40 km) and intra-plate rifting began. It is believed that the "subduction-style" geochemical signatures of the post-collisional calc-alkaline and high-K calc-alkaline granites were inherited from the source regions that had been activated during the subduction and syn-collision stages of the Siberian plate subducting beneath the North China Craton. |
| WOS关键词 | PERALUMINOUS GRANITES ; GEOCHEMICAL CONSTRAINTS ; TRACE-ELEMENT ; EMPLACEMENT ; MAGMATISM ; GENESIS ; CRUST ; LEUKOGRANITES ; DELAMINATION ; PETROGENESIS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000179484500001 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/77528]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu, HT |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, HT,Zhai, MG,Liu, JM,et al. The Mesozoic granitoids in the northern marginal region of North China Craton: evolution from post-collisional to anorogenic settings[J]. ACTA PETROLOGICA SINICA,2002,18(4):433-448. |
| APA | Liu, HT,Zhai, MG,Liu, JM,&Sun, SH.(2002).The Mesozoic granitoids in the northern marginal region of North China Craton: evolution from post-collisional to anorogenic settings.ACTA PETROLOGICA SINICA,18(4),433-448. |
| MLA | Liu, HT,et al."The Mesozoic granitoids in the northern marginal region of North China Craton: evolution from post-collisional to anorogenic settings".ACTA PETROLOGICA SINICA 18.4(2002):433-448. |
入库方式： OAI收割
来源：地质与地球物理研究所
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