Precise zircon U-Pb age dating of two mafic-ultramafic complexes at Tulargen large Cu-Ni district and its geological implications

	Precise zircon U-Pb age dating of two mafic-ultramafic complexes at Tulargen large Cu-Ni district and its geological implications
	San JinZhu 1,2; Qin KeZhang 1; Tang ZhongLi 3; Tang DongMei 1; Su BenXun 1,2; Sun He 1,2; Xiao QiangHua 1,2; Liu PingPing 1,2
刊名	ACTA PETROLOGICA SINICA
	2010-10-01
卷号	26 期号:10 页码:3027-3035
关键词	Tulargen Magmatic Cu-ni Deposit i And Ii Mafic-ultramafic Complex Geochemistry Zirocn U-pb Dating
ISSN号	1000-0569
文献子类	Article
英文摘要	Tulargen Cu-Ni deposit, its discovery was the most important exploration breakthrough of recent years, located in the eastern section of Huangshan-Jingrquan ore belt, eastern Xinjiang. There are three small intrusions in the ore district which named I, II and III complex, respectively. The ore-bearing property and exploration degree are both best in I intrusion. It shows typical ring-band structural lithofacies zones, so I complex is a syntectonic mafic-ultramafic intrusion. The result of gabbro zircon SHRIMP U-Pb age of I intrusion is 300.5 +/- 3. 2Ma, determined zircon SIMS age of II intrusion is 357.5 +/- 2. 5Ma. So the emplacement of II complex is earlier than I complex. I Intrusion formed in Late Carboniferous-Early Permian, which consists with formation ages of most east Tianshan mafic-ultramafic intrusions and associated Cu-Ni deposits. Furthermore the age makes the mafic-ultramafic magma activity related with magmatic Cu-Ni sulfide deposits ahead of about 10Ma in eastern Tianshan. While II intrusion formed in Early Carboniferous. So the two intrusions of Tulargen ore district are not formed in the same period of magmatic activity. The tectonic setting of II intrusion is different from the major metallogenic structure, extension setting of the late collision, of large-scale Early Permian magmatic Cu-Ni sulfide deposits in eastern Tianshan. REEs and trace elements analysis data of two intrusions both show LREE and HREE clear fractionation, enrichment of LREE and negative Nb and Ta anomalies. However, the slope of II intrusion is higher than I intrusion. I intrusion have Rb, Zr and Hf positive anomalies, while significant loss of Rb, enrichment of Ba in II intrusion. Furthermore, there are Sr positive anomalies and Zr, Hf negative anomalies. The trace elements characteristics of these two intrusions both display the feature of crustal contamination. II and III intrusions are both mainly consist of gabbro and ore-poor. The significant difference of forming age and geochemical characteristics of these two complexes indicated that the characteristics of parental magma are not like each other, but the both show the characteristics of crustal contamination, which is beneficial to mineralization. The ore potential of 11 and III complexes are not very good since the difference of forming age, trace elements geochemical characteristics and lithofacies zones among II and X complex. Owing to the II and III complexes are corresponding to the distribution of rock magnetic, gravity and resistivity, anomalies. We can't rule out the possibility of mineralization in deeper about them. It's worthy of further exploration and evaluation. Furthermore, the age makes the mafic-ultramafic magma activity related with magmatic Cu-Ni sulfide deposits ahead of about 10Ma in eastern Tianshan. It provided a basis for chronology in further exploration in eastern Tianshan area.
WOS关键词	PALEO-ASIAN OCEAN ; TECTONIC EVOLUTION ; EASTERN XINJIANG ; CHINA ; TIANSHAN ; CONSTRAINTS ; SULFIDE ; GEOCHEMISTRY ; INTRUSIONS ; DEPOSIT
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000284450800014
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73194]
专题	中国科学院地质与地球物理研究所
通讯作者	San JinZhu
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Changan Univ, Coll Earth Sci & Land Recourses, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	San JinZhu,Qin KeZhang,Tang ZhongLi,et al. Precise zircon U-Pb age dating of two mafic-ultramafic complexes at Tulargen large Cu-Ni district and its geological implications[J]. ACTA PETROLOGICA SINICA,2010,26(10):3027-3035.
APA	San JinZhu.,Qin KeZhang.,Tang ZhongLi.,Tang DongMei.,Su BenXun.,...&Liu PingPing.(2010).Precise zircon U-Pb age dating of two mafic-ultramafic complexes at Tulargen large Cu-Ni district and its geological implications.ACTA PETROLOGICA SINICA,26(10),3027-3035.
MLA	San JinZhu,et al."Precise zircon U-Pb age dating of two mafic-ultramafic complexes at Tulargen large Cu-Ni district and its geological implications".ACTA PETROLOGICA SINICA 26.10(2010):3027-3035.