SHRIMP U-Pb and Ar-Ar geochronology of major porphyry and skarn Cu deposits in the Balkhash Metallogenic Belt, Central Asia, and geological implications

doi:10.1016/j.jseaes.2013.06.011

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	SHRIMP U-Pb and Ar-Ar geochronology of major porphyry and skarn Cu deposits in the Balkhash Metallogenic Belt, Central Asia, and geological implications
	Chen, Xuanhua 6; Seitmuratova, Eleonora 1; Wang, Zhihong 2; Chen, Zhengle 2; Han, Shuqin 2; Li, Yong ; Yang, Yi 3; Ye, Baoying 4; Shi, Wei 2
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2014
卷号	79 页码:723-740
关键词	Porphyry copper deposit Skarn copper deposit SHRIMP zircon U-Pb dating Ar-40/Ar-39 dating Balkhash metallogenic belt Kazakhstan
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2013.06.011
英文摘要	The Balkhash Metallogenic Belt (BMB) in Kazakhstan, Central Asia, with the occurrence of the super-large Kounrad and Aktogai, the large Bony porphyry Cu-Mo deposits, and the large Sayak skarn polymetallic ore-field, is one of the central regions of the Paleozoic Central Asian metallogenic domain and orogenic belt. In this study, newly obtained SHRIMP zircon U-Pb ages of nine samples and Ar-40/Ar-39 ages of six mineral samples (inclding hornblende, biotite and K-feldspar) give more detailed constraints. on the timing of the granitic intrusions and their metallogeny. Porphyritic monzonite granite and tonalite porphyry from the Kounrad deposit yield U-Pb zircon SHRIMP ages of 327.3 +/- 2.1 Ma and 308.7 +/- 2.2 Ma, respectively. Quartz diorite and porphyritic granodiorite from the Aktogai deposit yield U-Pb SHRIMP ages of 335.7 +/- 1.3 Ma and 327.5 +/- 1.9 Ma, respectively. Porphyritic granodiorite and granodiorite from the Borly deposit yield U-Pb SHRIMP ages of 316.3 +/- 0.8 Ma and 305 +/- 3 Ma, respectively. Diorite, granodiorite, and monzonite from the Sayak ore-field yield U-Pb SHRIMP ages of 335 +/- 2 Ma, 308 +/- 10 Ma, and 297 +/- 3 Ma, respectively. Hornblende, biotite, and K-feldspar from the Aktogai deposit yield Ar-40/Ar-39 cooling ages of 310.6 Ma, 271.5 Ma, and 274.9 Ma; respectively. Hornblende, biotite, and K-feldspar from the Sayak orefield yield Ar-40/Ar-39 cooling ages of 287.3 +/- 2.8 Ma, 307.9 +/- 1.8 Ma, and 249.8 +/- 1.6 Ma, respectively. The new ages constrain the timing of Late Paleozoic felsic magmatism to 336 to 297 Ma. Skarn mineralization in the Sayak ore-field formed at similar to 335 and similar to 308 Ma. Porphyry Cu-Mo mineralization in the Kounrad deposit and the Aktogai deposit formed at similar to 327 Ma, and in the Borly deposit at similar to 316 Ma. The Late Paleozoic regional cooling in the temperature range of 600 degrees C to 150 degrees C occurred from similar to 307 to similar to 257 Ma. (C) 2013 Elsevier Ltd. All rights reserved.
学科主题	矿床地质
WOS关键词	COPPER-DEPOSIT ; NW CHINA ; RE-OS ; XINJIANG ; ACCRETION ; ALTAIDS ; MODELS ; AGES ; MO
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000330605000012
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/41080]
专题	中国地质科学院地质力学研究所
作者单位	1.Chinese Acad Geol Sci, Beijing 100037, Peoples R China 2.K Satpaev Inst Geol Sci, Lab Geol Format, Alma Ata 050010, Kazakhstan 3.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China 4.Xinjiang Bur Geol Explorat, Geol Survey Team 1, Urumqi 830011, Peoples R China 5.China Univ Geosci, Beijing 100083, Peoples R China 6.中国地质科学院（院部）
推荐引用方式 GB/T 7714	Chen, Xuanhua,Seitmuratova, Eleonora,Wang, Zhihong,et al. SHRIMP U-Pb and Ar-Ar geochronology of major porphyry and skarn Cu deposits in the Balkhash Metallogenic Belt, Central Asia, and geological implications[J]. JOURNAL OF ASIAN EARTH SCIENCES,2014,79:723-740.
APA	Chen, Xuanhua.,Seitmuratova, Eleonora.,Wang, Zhihong.,Chen, Zhengle.,Han, Shuqin.,...&Shi, Wei.(2014).SHRIMP U-Pb and Ar-Ar geochronology of major porphyry and skarn Cu deposits in the Balkhash Metallogenic Belt, Central Asia, and geological implications.JOURNAL OF ASIAN EARTH SCIENCES,79,723-740.
MLA	Chen, Xuanhua,et al."SHRIMP U-Pb and Ar-Ar geochronology of major porphyry and skarn Cu deposits in the Balkhash Metallogenic Belt, Central Asia, and geological implications".JOURNAL OF ASIAN EARTH SCIENCES 79(2014):723-740.