Characteristics of magmatic activity in the Xilekuduke Mo-Cu ore district, Fuyun County, Xinjiang, and its constrains on regional tectonic evolution in late-post collisional stages
文献类型：期刊论文
| 作者 | You Jun1,2; Hong Tao1,2; Wu Chu3,4; Ding RuFu5; Xu XingWang1 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2016-05-01 |
| 卷号 | 32期号:5页码:1262-1282 |
| 关键词 | Tectonic evolution Magma activity Late collision Post collision Xilekuduke Xinjiang |
| 文献子类 | Article |
| 英文摘要 | The time and metallogenesis of collision between different terrains is one of the hottest topics for tectonic evolution and mineralization of the Central-Asia Orogenic Belt. It' s unclear that whether there is late-collisional magmatic activity in northern Xinjiang area. The tectonic transformation time from collision to post-collision, characteristics of magmatic activity and metallogenenic response during this tectonic evolution are also undefined. The present paper reports new geochemical and chronological data of intrusive rocks in the Xilekuduke district, northern area of East Junggar. The intrusive rocks are divided into four types, including the 340Ma diorite, 328Ma monzonitic granite, 325Ma granite porphyry and 315Ma quartz porphyry. All the four kind intrusive rocks are high-K calc-alkalic. The diorites possibly formed at late-collisional setting. The diorites are metaluminous, and have typical geochemical signatures of arc, including depletion of Nb, Ta and Ti, and without depletion of P and abnormality of delta Eu. The monzonitic granites and granite porphyries possibly formed at the early stage of post collisional setting. The monzonitic granites are weakly peraluminous, and have transformational geochemical signatures of arc and post-collisional granite, such as weakly possive abnormality of delta Eu, depletion of Nb, Ta and Ti, and medium depletion of P. The granite porphyries are weakly peraluminous, and have untypical geochemical signatures of post collisional granite, including negative Eu anomaly, the obvious depletion of Nb, Ta, Ti, P. The weakly peraluminous quartz porphyries have typical geochemical signatures of post collisional granite, including negative Eu anomaly, strong depletion of P, were possibly formed at post-collisional extension setting. Evidence that the intrusive rocks in the Xilekuduke district have low (Sr-87/Sr-86), ratio (0. 702976 to 0. 704306) and positive epsilon(Nd) (t) values ( +5. 8 to +6. 8) with t(DM), ages ranging from 524Ma to 588Ma suggests that they were possibly derived from partial melting of the Early Paleozoic oceanic crust. It is suggested that the Sawuer island arc had experienced five evolutional periods in the Late Palaeozoic as following: subduction period (from 400 to 370Ma), major collision period (from 360 to 340Ma), late-collision period (from 340 to 330Ma), early post-collision) period (from 330 to 320Ma) and post-collision) extension period (from 320 to 280Ma). |
| WOS关键词 | U-PB AGE ; IONIZATION MASS-SPECTROMETRY ; WEST JUNGGAR ; EAST JUNGGAR ; GEOLOGICAL IMPLICATIONS ; VOLCANIC-ROCKS ; TRACE-ELEMENT ; SAWUER REGION ; GEOCHEMICAL CHARACTERISTICS ; GEODYNAMIC SIGNIFICANCE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000377629600002 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/53420]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 4.China Univ Geosci, Sch Geosci & Resources, Beijing 100083, Peoples R China 5.China Nonferrous Met Resource Geol Survey, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | You Jun,Hong Tao,Wu Chu,et al. Characteristics of magmatic activity in the Xilekuduke Mo-Cu ore district, Fuyun County, Xinjiang, and its constrains on regional tectonic evolution in late-post collisional stages[J]. ACTA PETROLOGICA SINICA,2016,32(5):1262-1282. |
| APA | You Jun,Hong Tao,Wu Chu,Ding RuFu,&Xu XingWang.(2016).Characteristics of magmatic activity in the Xilekuduke Mo-Cu ore district, Fuyun County, Xinjiang, and its constrains on regional tectonic evolution in late-post collisional stages.ACTA PETROLOGICA SINICA,32(5),1262-1282. |
| MLA | You Jun,et al."Characteristics of magmatic activity in the Xilekuduke Mo-Cu ore district, Fuyun County, Xinjiang, and its constrains on regional tectonic evolution in late-post collisional stages".ACTA PETROLOGICA SINICA 32.5(2016):1262-1282. |
入库方式： OAI收割
来源：地质与地球物理研究所
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