Geochemistry and Genesis of the Late Jurassic Granitoids at Northern  Great Hinggan Range： Implications for Exploration

IMR OpenIR

	Geochemistry and Genesis of the Late Jurassic Granitoids at Northern Great Hinggan Range： Implications for Exploration
其他题名	Geochemistry and Genesis of the Late Jurassic Granitoids at Northern Great Hinggan Range： Implications for Exploration
	WU Guang 1; CHEN Yanjing 2; SUN Fengyue 3; ZHANG Zhe 4; LIU Ankun 2; LI Zhitong 4
	2010
发表期刊	地质学报：英文版
ISSN	1000-9515
卷号	84.0 期号:002 页码:321-332
摘要	The Longgouhe and Ershiyizhan intrusions of the Late Jurassic, located in the Upper Heilongjiang Basin of the northern Great Hinggan Range, are closely related to porphyry Cu-Au mineralizations. In lithology the intrusions are quartz diorite, quartz monzodiorite and granodiorite of high-K caIc-alkaline series, with minor aspects of shoshonite series. Their SiO2 and A1203 contents range from 61.37% to 66.59% and 15.35% to 17.06%, respectively. The MgO content ranges from 2.02 % to 3.47 %, with Mg# indices of 44-59. The （La/Yb）N and Eu/Eu＊ values range from 16.85 to 81.73 and 0.68 to 0.93, respectively, showing strong differentiation rare earth element （REE） patterns similar to those of adakites. The rocks are enriched in Ba, Sr and light REE （LREE）, obviously depleted in Nb and Ta, slightly depleted in Rb and Ti, and poor in Yb and Y, with Yb and Y contents of 0.31-1.32 ppm and 4.32-12.07 ppm, respectively. As indicated by Sr/Y ratios of 67.74-220.60, the rocks are characterized by low-Y and high-Sr contents, which characterize the adakites in the world. Holistically, geochemical tracers suggest that the interested intrusions are adakitic rocks. Given that the Paleo- Asian Ocean and Mongol-Okhotsk Ocean were closed in the Late Paleozoic and Permian-Middle Jurassic, respectively, the interested intrusions should be formed by partial melting of delaminated crust, which had been thickened during collisional orogeny between the Siberian and Mongolian- Sinokorean continents.
其他摘要	The Longgouhe and Ershiyizhan intrusions of the Late Jurassic, located in the Upper Heilongjiang Basin of the northern Great Hinggan Range, are closely related to porphyry Cu-Au mineralizations. In lithology the intrusions are quartz diorite, quartz monzodiorite and granodiorite of high-K caIc-alkaline series, with minor aspects of shoshonite series. Their SiO2 and A1203 contents range from 61.37% to 66.59% and 15.35% to 17.06%, respectively. The MgO content ranges from 2.02 % to 3.47 %, with Mg# indices of 44-59. The （La/Yb）N and Eu/Eu＊ values range from 16.85 to 81.73 and 0.68 to 0.93, respectively, showing strong differentiation rare earth element （REE） patterns similar to those of adakites. The rocks are enriched in Ba, Sr and light REE （LREE）, obviously depleted in Nb and Ta, slightly depleted in Rb and Ti, and poor in Yb and Y, with Yb and Y contents of 0.31-1.32 ppm and 4.32-12.07 ppm, respectively. As indicated by Sr/Y ratios of 67.74-220.60, the rocks are characterized by low-Y and high-Sr contents, which characterize the adakites in the world. Holistically, geochemical tracers suggest that the interested intrusions are adakitic rocks. Given that the Paleo- Asian Ocean and Mongol-Okhotsk Ocean were closed in the Late Paleozoic and Permian-Middle Jurassic, respectively, the interested intrusions should be formed by partial melting of delaminated crust, which had been thickened during collisional orogeny between the Siberian and Mongolian- Sinokorean continents.
关键词	大兴安岭北部花岗岩成因晚侏罗世地球化学勘探
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:3824842
引用统计	被引频次：11[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/155284
专题	中国科学院金属研究所
作者单位	1.中国科学院广州地球化学研究所 2.北京大学 3.吉林大学 4.中国科学院金属研究所
推荐引用方式 GB/T 7714	WU Guang,CHEN Yanjing,SUN Fengyue,等. Geochemistry and Genesis of the Late Jurassic Granitoids at Northern Great Hinggan Range： Implications for Exploration[J]. 地质学报：英文版,2010,84.0(002):321-332.
APA	WU Guang,CHEN Yanjing,SUN Fengyue,ZHANG Zhe,LIU Ankun,&LI Zhitong.(2010).Geochemistry and Genesis of the Late Jurassic Granitoids at Northern Great Hinggan Range： Implications for Exploration.地质学报：英文版,84.0(002),321-332.
MLA	WU Guang,et al."Geochemistry and Genesis of the Late Jurassic Granitoids at Northern Great Hinggan Range： Implications for Exploration".地质学报：英文版 84.0.002(2010):321-332.