Age and tectonic setting of volcanic rocks of the Tamulangou Formation in the Great Xing'an Range, NE China

被引:37
作者
Li, Shi-Chao [1 ]
Liu, Zheng-Hong [1 ]
Xu, Zhong-Yuan [1 ]
Li, Gang [1 ]
Zhang, Chao [1 ]
机构
[1] Jilin Univ, Coll Earth Sci, Changchun 130061, Jilin, Peoples R China
关键词
Great Xing'an Range; Tamulangou Formation; Volcanic rock; Mongol-Okhotsk Ocean; U-PB AGES; INNER-MONGOLIA; OROGENIC BELT; CONSTRAINTS; EVOLUTION; GEOCHEMISTRY; GEOCHRONOLOGY; CLASSIFICATION; HEILONGJIANG; COLLISION;
D O I
10.1016/j.jseaes.2014.09.014
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Zircon U-Pb chronological and geochemical research has been undertaken on the volcanic rocks of the Tamulangou Formation in the Zhalantun area, middle part of the Great Xing'an Range in NE China. The volcanic rocks yield ages of similar to 147 Ma (the Late Jurassic), 14-17 Myr younger than volcanic rocks of the same formation in the northern part of the Great Xing'an Range, indicating that volcanism spanned the Middle-Late Jurassic. The Tamulangou volcanic rocks, together with the JixiangFeng Formation and rhyolite of the Shangkuli Formation, constitute bimodal volcanics related to widespread coeval A-type granites, suggesting the Tamulangou Formation volcanics formed in an extensional environment. Spatial variations in petrological, geochronological, and geochemical features of the volcanic rocks of the Tamulangou Formation indicate subduction to the southeast following orogenesis and closure of the Mongol-Okhotsk Ocean. (c) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:471 / 480
页数:10
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