位置:成果数据库 > 期刊 > 期刊详情页
Hf isotopic composition of zircons from the Huashan-Guposhan intrusive complex and their mafic enclaves in northeastern Guangxi: Implication for petrogenesis
  • ISSN号:1006-7493
  • 期刊名称:《高校地质学报》
  • 时间:0
  • 分类:N[自然科学总论]
  • 作者机构:[1]State Key Laboratory for Mineral Deposits Research, Sehool of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China
  • 相关基金:Prof. Zhu Jinchu collected samples and separated zircons. The authors thank Dr. Wu Fuyuan and Dr. Xie Liewen for helping in Hf isotope analyses. Thanks are also due to three reviewers for helpful comments. This work was supported by the National Natural Science Foundation of China (Grant Nos. 40221301 and 40603003) and State Key Laboratory for Min- eral Deposits Research (Grant No. 2008-Ⅲ-02).
中文摘要:

标明日期的高精确锆石 U-Pb 显示那主要恼人的身体(Tongan, Niumiao, Huashan, Lisong ) ,并且在 Huashan-Guposhan 建筑群的一块 mafic microgranular 被外国领地包围的土地在 160163 妈被形成。从 Huashan 花岗石的锆石的 ? Hf (t) 价值变化从 ? 2.8 变化到从 Lisong 花岗石的 +0.3 和那些从 ? 2.3 到 +0.3,它与从 Lisong 花岗石的 mafic 被外国领地包围的土地的那些价值(到 +7.4 的 +2.6 ) 显然是不同的。这些 Hf 同位素的数据显示 mafic 被外国领地包围的土地和主机花岗石从岩浆的不同来源被使结晶,为 mafic-felsic 岩浆混合提供证据处理。最高 ? 从 mafic 被外国领地包围的土地的锆石的 Hf (t) 价值直到 +7.4,显示 mafic 岩浆从相对弄空的披风来源被发源。在这个区域的地区性的地质学和同时期的 mafic 和碱的岩石上的研究显示 mafic 岩浆没从玄武岩的少年外壳重做,但是从披风的部分融化被发源。然而, mafic 岩浆是否从岩流圈或 lithospheric 披风的部分融化被导出,尚待被决定。Huashan 花岗石和 Lisong 花岗石从导出披风、导出外壳的岩浆的混合岩浆被形成,并且 mafic 被外国领地包围的土地在混合过程期间被看作导出披风的岩浆的遗体。从 Niumiao 闪长岩的锆石的 ? Hf (t) 价值变化从 ? 1.1 变化到从 Tongan 石英二长岩的 +2.1,和那些从 ? 1.7 到 +1.7。这些价值是比从 mafic 被外国领地包围的土地的那些低的,建议闪长岩和二长岩从有 mafic 被外国领地包围的土地的不同导出来源的岩浆被形成。为 Niumiao 闪长岩和 Tongan 二长岩的 ? Hf (t) 价值仅仅比为 Hushan 花岗石和 Lisong 花岗石的那些稍微高。丰富的 mafic 被外国领地包围的土地也发生在 Niumiao 闪长岩并且在 Tongan 二长岩。因此,我们建议 Niumiao 闪长岩和 Tongan 二长岩也可能从象花岗石的一样的混合岩浆被形成,但是通过部分结晶化和外壳的污?

英文摘要:

High precision zircon U-Pb dating indicates that main intrusive bodies (Tong'an, Niumiao, Huashan, Lisong), and a marie microgranular enclave in the Huashan-Guposhan complex were formed at 160-163 Ma. The εHf(t) values of zircons from the Huashan granite vary from -2.8 to +0.3 and those from the Lisong granite vary from -2.3 to +0.3, which are obviously different with those values (+2.6 to +7.4) of the mafic enclaves from the Lisong granite. These Hf isotopic data indicate that the mafic enclaves and host granites were crystallized from different sources of magmas, providing evidence for mafic-felsic magma mixing processes. The highest ear(t) value of zircons from the marie enclaves is up to +7.4, indicating that the marie magma was originated from a relatively depleted mantle source. Studies on regional geology and the contemporaneous mafic and alkaline rocks in this area indicate that the marie magma was not originated from reworking of basaltic juvenile crust, but from partial melting of the mantle. However, it remains to be resolved whether the mafic magma was derived from partial melting of the asthenosphere or the lithospheric mantle. The Huashan granite and the Lisong granite were formed from hybrid magma of mantle-derived and crust-derived magmas, and the marie enclaves are considered as remains of mantle-derived magma during mixing processes. The εHf(t) values of zircons from the Niumiao diorite vary from -1.1 to +2.1, and those from the Tong'an quartz monzonite vary from -1.7 to + 1.7. These values are lower than those from the marie enclaves, suggesting that the diorite and monzonite were formed from different source-derived magmas with the marie enclaves. The εHf(t) values for the Niumiao diorite and the Tong'an monzonite are only slightly higher than those for the Hushan granite and the Lisong granite. Abundant mafic enclaves also occur in the Niumiao diorite and in the Tong'an monzonite. Thus, we suggest that the Niumiao diorite and the Tong'an monz

同期刊论文项目
同项目期刊论文
期刊信息
  • 《高校地质学报》
  • 中国科技核心期刊
  • 主管单位:教育部
  • 主办单位:南京大学
  • 主编:王汝成
  • 地址:南京市栖霞区仙林大道号南京大学共山楼
  • 邮编:210023
  • 邮箱:gxdzh@nju.edu.cn
  • 电话:025-83594340
  • 国际标准刊号:ISSN:1006-7493
  • 国内统一刊号:ISSN:32-1440/P
  • 邮发代号:
  • 获奖情况:
  • 1)2011年获中国高校期刊研究会颁发的“首届中国...,2)2012年“学术讨论与争鸣”栏目获江苏省科学技...,3)2012年被中国学术期刊(光盘版)电子杂志社,...,4)2013年被中国学术期刊(光盘版)电子杂志社,...,5)2014年获中国高校期刊研究会颁
  • 国内外数据库收录:
  • 美国化学文摘(网络版),美国地质文献预评数据库,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:12035