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Uprising period and elevation of the Wenyu granitic pluton in the Xiaoqinling District, Central China
  • ISSN号:1006-9372
  • 期刊名称:《中国地质教育》
  • 时间:0
  • 分类:P588.121[天文地球—岩石学;天文地球—地质学] X143[环境科学与工程—环境科学]
  • 作者机构:[1]School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China, [2]Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China, [3]Surveying and Mapping Institute of Geology and Mineral Resources of Liaoning Province, Shenyang 110121, China
  • 相关基金:We thank Professor Dong Yunpeng and anonymous reviewer for their helpful comments on different versions and constructive reviews. And we appreciate Professor Xu Jiuhua, Wang Beiyi, Yang Zhihua, Ji Wenhua, Han Fanlin and Liang Binxiang for their enthusiastic help infield investi- gation. We are also grateful to scientists from Institute of High Energy Physics Academy of Sciences for their help in dating fission track in apa- tites and zircons, and scientists at the Laboratory of Orogenic Belts and Crustal Evolution (Peking University)for conducting sericite Ar-Ar dating. This work was supported by the National Natural Science Foundation of China (90814006).
中文摘要:

Xiaoqinling 区域是在中国的一个重要金生产的区域。它关于金存款评价第二到 Jiaodong。Wenyu 花岗石的 pluton 的升起的时期和存款的墙岩石,对矿石探索重要。锆石的分裂轨道(英尺) 分析和从 Wenyu 花岗石的 pluton 的花岗石的岩石的磷灰石显示出那磷灰石英尺(在船尾) 当模特儿的数据显示 20 的快速的冷却率

英文摘要:

Xiaoqinling District is an important gold-producing area in China. It ranks second to Jiaodong with regard to gold deposits. The uprising period of the Wenyu granitic pluton and the wall-rocks of the deposit, as well as the mineralizing depth and reserved place of gold ore bodies, are significant to ore exploration. Fission-track (FT) analysis of zircons and apatites of granitic rocks from the Wenyu granitic pluton shows that apatite FT (AFT) data modeling indicates a rapid cooling rate of 20℃/Ma from 138 to 120 Ma after emplacement at 138 Ma. Thermal evolution and inversion curves suggest a secondary phase of fast cooling and up- rising from 45 to 35 Ma, and 35 Ma, respectively, with a cooling rate of 6.7℃/Ma and a denudation quantity of -4.3 km. The last cooling phase took place from 〈4 Ma, with an average cooling rate of -11.3℃/Ma and a denudation amount of 1.3 km. Total exhumation quantity of 5.6 km and uprising elevation of 7.3 km are similar to the estimated results of fluid inclusions from the Dongtongyu and Wenyu gold deposits. The 39Ar/40Ar dating of sericite from the fault planes of the Xunmadao-Xiaohe and Taiyao faults demonstrate two uprising activities of the ore-host metamorphic complex. The Huashan and Wenyu granitic plutons inten- sively occurred during 77 and 45 Ma, respectively. These data sets are valuable for understanding the uplifting process and for preserving gold ore bodies in the Xiaoqinling area, as well as for further studies on tectonic evolutions of the Taihua Complex and the Qinling-Dabie Orogen.

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期刊信息
  • 《中国地质教育》
  • 主管单位:中华人民共和国国土资源部
  • 主办单位:中国地质学会 中国地质大学(北京)
  • 主编:吴淦国
  • 地址:北京市海淀区学院路29号
  • 邮编:100083
  • 邮箱:bjb3162@cugb.edu.cn
  • 电话:010-82323162
  • 国际标准刊号:ISSN:1006-9372
  • 国内统一刊号:ISSN:11-3777/G4
  • 邮发代号:80-474
  • 获奖情况:
  • 河北省编校质量较好期刊,河北省执行著作权法先进单位
  • 国内外数据库收录:
  • 中国国家哲学社会科学学术期刊数据库
  • 被引量:5689