Academic Journal
Neoarchean subduction: A case study of arc volcanic rocks in Qinglong-Zhuzhangzi area of the Eastern Hebei Province, North China Craton
| العنوان: | Neoarchean subduction: A case study of arc volcanic rocks in Qinglong-Zhuzhangzi area of the Eastern Hebei Province, North China Craton |
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| المؤلفون: | Guo, Rongrong, Liu, Shuwen, Wyman, Derek, Bai, Xiang, Wang, Wei, Yan, Ming, Li, Qiugen |
| المساهمون: | Liu, SW (reprint author), Peking Univ, Sch Earth & Space Sci, Minist Educ, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China., Peking Univ, Sch Earth & Space Sci, Minist Educ, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China., Univ Sydney, Sch Geosci F09, Sydney, NSW 2006, Australia., China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China., PetroChina Liaohe Oilfield Co, Res Inst Petr Explorat & Dev, Panjin 124000, Peoples R China. |
| المصدر: | SCI |
| بيانات النشر: | PRECAMBRIAN RESEARCH |
| سنة النشر: | 2015 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | Volcanic arc, Geochemistry, Zircon U-Pb-Hf isotopes, Late Archean subduction, Qinglong-Zhuzhangzi, North China Craton, ABITIBI GREENSTONE-BELT, U-PB GEOCHRONOLOGY, PALEOPROTEROZOIC TECTONIC EVOLUTION, WESTERN LIAONING PROVINCE, HF ISOTOPIC SYSTEMATICS, EPISODIC CONTINENTAL GROWTH, TRACE-ELEMENT GEOCHEMISTRY, LOWER CRUSTAL SECTION, SINO-KOREAN CRATON, ND ISOCHRON AGE |
| الوصف: | We report on volcanic rocks of the Qinglong-Zhuzhangzi area in northeastern Eastern Hebei Province, North China Craton. The supracrustal rock associations in the study area consist of amphibole/biotite plagioclase gneiss, mica (plagioclase) gneiss/schist, biotite K-feldspar gneiss, (pyroxene) plagioclase amphibolite and amphibolite. Twenty-five new mafic, intermediate to felsic samples can be geochemically classified into four groups. Group 1 is similar to fore arc low Ti tholeiite and is characterized by low SiO2 (49.7 wt%) and TiO2 (0.43 wt%), slightly depleted LREE and MREE pattern with (La/Yb)(N) ratio of 0.74, (Gd/Yb)(N) ratio of 0.82. It most likely derived from depleted mantle in a subduction initiation environment. Group 2 is akin to primitive arc tholeiites with low SiO2 (49.7-51.8 wt%), slight enrichments of LREE ((La/Sm)(N): 1.06-1.53) and negative Nb anomalies ((Nb/La)(PM): 0.50-0.76). Group 3 resembles evolved arc tholeiites and displays pronounced enrichments of LREE ((La/Yb)(N) of 2.38-11.3, (La/Sm)(N) of 1.70-2.86) and negative Nb, Ta anomalies ((Nb/La)(PM) : 0.14-0.34, except sample 11JD28-4 with that ratio of 1.00). Group 2 and 3 formed by partial melting of sub-arc depleted mantle wedge modified by differing quantities of slab flux addition. Group 4 comprises K-rich andesite-dacites, which are distinguished by the highest SiO2 (54.0-71.8 wt%), K contents (up to 5.03 wt%), strong enrichments of LREE ((La/Yb)(N) ratios of 4.83-19) and negative Nb-Ta anomalies, analogous to shoshonitic rocks marking late stage of subduction. LA-ICPMS zircon U-Pb and Lu-Hf analyses of evolved arc basalts and K-rich andesite-dacites display crystallization ages of 2511-2604 Ma and single stage Hf model ages of 2534-2927 Ma (most focus on 2650-2800 Ma). In contrast to similar to 2510-2560 Ma arc associations, similar to 2604 Ma shoshonitic dacites most plausibly represent an older orogenic event. Collectively, supracrustal rocks in the Qinglong-Zhuzhangzi area constitute a series of volcanic arc associations that ... |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | Chinese |
| ردمك: | 978-0-00-356190-6 0-00-356190-9 |
| تدمد: | 0301-9268 1872-7433 |
| Relation: | PRECAMBRIAN RESEARCH.2015,264,36-62.; 1300804; http://hdl.handle.net/20.500.11897/418948; WOS:000356190900004 |
| DOI: | 10.1016/j.precamres.2015.04.007 |
| الاتاحة: | https://hdl.handle.net/20.500.11897/418948 https://doi.org/10.1016/j.precamres.2015.04.007 |
| رقم الانضمام: | edsbas.71C3370D |
| قاعدة البيانات: | BASE |
| ردمك: | 9780003561906 0003561909 |
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| تدمد: | 03019268 18727433 |
| DOI: | 10.1016/j.precamres.2015.04.007 |