Volume 37 Issue 6
Jun.  2012
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Article Navigation >  Earth Science  > 2012  >  37(6): 1327-1337
YANG Mei-zhen, HOU Kun, LU Jian-pei, JIANG Feng, FU Jing-jing, 2012. Chronology of Molybdenum-Lead-Zinc Polymetallic Deposit of Suo Naga, Dong Ujimqin Banner Region. Earth Science, 37(6): 1327-1337. doi: 10.3799/dqkx.2012.140
Citation: YANG Mei-zhen, HOU Kun, LU Jian-pei, JIANG Feng, FU Jing-jing, 2012. Chronology of Molybdenum-Lead-Zinc Polymetallic Deposit of Suo Naga, Dong Ujimqin Banner Region. Earth Science, 37(6): 1327-1337. doi: 10.3799/dqkx.2012.140
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Chronology of Molybdenum-Lead-Zinc Polymetallic Deposit of Suo Naga, Dong Ujimqin Banner Region

doi: 10.3799/dqkx.2012.140

  • Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China

  • Received Date: 2012-07-19
    Available Online: 2021-11-09
  • Publish Date: 2012-06-15
    Abstract
  • Suo Naga molybdenum-lead-zinc ore deposit has been discovered in Erenhot-Dong Ujimqin Banner metal metallogenic belt in recent years following the discovery of Di Yan porphyry molybdenum deposit. It is characterized by vienlet-type porphyry molybdenum and vien-type lead-zinc mineralization. By using in situ zircon LA-ICP-MS U-Pb and molybdenite ICP-MS Re-Os highly precise dating techniques,one zircon sample from Suo Naga granite-porphyry related to mineralization,and three samples of molybdenum from Mo ores are determined. Zircon 206Pb/238U Weighted mean age of 164.8±2.0 Ma (MSWD=0.71),concordant curve intercepts at 167.8±2.6 Ma (MSWD=1.4) Ma and molybenite 187Re-187Os weighted mean age of 127.82±0.87 Ma are obtained respectively. The results show that the age of granitic magma intrusion corresponds to that of mineralization in the range of deviation. An important metallogenic event,which occurred during early Yanshanian(167 Ma ±) at Erenhot-Dong Ujimqin Banner metal metallogenic belt,was confirmed. The time limit corresponds to that of large scale volcanic eruption in northern region of Inner Mongolia at early stage during Mesozoic period. By comprehensive analysis,it is proposed that the two important metallogenic events are respectively related to twice large-scale volcanic eruptions and intrusions during Mesozoic period in Dong Ujimqin Banner region and even southern area of Hinggan mountains.

     

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