Geochronological constraints on skarn copper metallogenesis of the large-scale Sayak ore field, Kazakhstan, Central Asia

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	Geochronological constraints on skarn copper metallogenesis of the large-scale Sayak ore field, Kazakhstan, Central Asia
	Chen, XH (Chen XuanHua); Wang, ZH (Wang ZhiHong); Chen, ZL (Chen ZhengLe); Han, SQ (Han ShuQin); Seitmuratova, E (Seitmuratova, Eleonora); Yang, Y (Yang Yi); Ye, BY (Ye BaoYing); Chen, W (Chen Wen)
刊名	ACTA PETROLOGICA SINICA
	2012
卷号	28 期号:7 页码:1981-1994
关键词	Metallogenic age SHRIMP U-Pb Ar-40/Ar-39 Fission track Sayak copper ore field Balkhash metallogenic belt
ISSN号	1000-0569
英文摘要	The Sayak ore field, composed of several separated skarn Cu and porphyry Cu-Mo deposits and Cu-Au-Mo lodes in the Sayak synclinorium, is the only one area with the occurrence of large-scale skarn Cu deposits in the Balkhash metallogenic belt, Kazakhstan, Central Asia. It consists of a metallogenic series with skarn and porphyry deposits as the two end members. Zircon SHRIMP U-Pb geochronology of the skarn-related granitoids presents three phases of pluton intrusions in the Middle to Late Hercynian at 335 +/- 2Ma (diorite), 308 +/- 10Ma (granodiorite), and 297 +/- 3Ma (monzonite), respectively. The first two phases of intrusions are consistent with the skarn Cu metallogenesis, suggesting the main and secondary skarn Cu metallogenic ages at 335 +/- 2Ma and 308 +/- 10Ma, before and after the regional main porphyry Cu metallogenesis, respectively. Ar-40/Ar-39 thermochronology of hornblede, biotite, and K-feldspar from granitoids gives the cooling ages at 286.6 +/- 6.7Ma, 306.6 +/- 2.9Ma, and 257 +/- 11Ma, respectively, constraining the skarn metallogenic time further more. Apatite fission track dating and thermal history modeling of granitoids gives low temperature cooling ages ranging from 85.4 +/- 4.5Ma to 66.9 +/- 4.1Ma, suggesting the uplifting and exhumation of the skarn Cu deposits together with the granitoids during the Late Cretaceous in the Sayak ore field. The geochronological data presented in this paper, together with metallogenic information from previous studies, reveal the entire thermo-history, from the intrusion of plutons and skarn metallogenesis in the abyssal system, and regional cooling, to the exhumation of the deposits, in the Sayak ore field.
学科主题	地质年代学
WOS关键词	FISSION-TRACK EVIDENCE ; GEOLOGICAL SIGNIFICANCE ; JUNGGAR BASIN ; APATITE ; BALKHASH ; DEPOSITS ; REGION ; MIDDLE ; CHINA ; BELT
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000306631600003
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39694]
专题	中国地质调查局
作者单位	China Univ Geosci, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Chen, XH ,Wang, ZH ,Chen, ZL ,et al. Geochronological constraints on skarn copper metallogenesis of the large-scale Sayak ore field, Kazakhstan, Central Asia[J]. ACTA PETROLOGICA SINICA,2012,28(7):1981-1994.
APA	Chen, XH .,Wang, ZH .,Chen, ZL .,Han, SQ .,Seitmuratova, E .,...&Chen, W .(2012).Geochronological constraints on skarn copper metallogenesis of the large-scale Sayak ore field, Kazakhstan, Central Asia.ACTA PETROLOGICA SINICA,28(7),1981-1994.
MLA	Chen, XH ,et al."Geochronological constraints on skarn copper metallogenesis of the large-scale Sayak ore field, Kazakhstan, Central Asia".ACTA PETROLOGICA SINICA 28.7(2012):1981-1994.