Earth Science Frontiers ›› 2011, Vol. 18 ›› Issue (3): 233-240.

• Article • Previous Articles     Next Articles

The Early Cretaceous volcanic rocks in Suhongtu Depression in Yingen  Ejina Qi Basin: Its scientific significance to the research of Altun Fault.

  


  1. 1. The Institute of Gas Geology， Henan Polytechnic University, Jiaozuo 454000， China
    2. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640， China
    3. Institute of Earth Resources and Information, University of Petroleum(East China), Dongying 257061， China
    4. Research Institute of Exploration and Development, SINOPEC, Beijing 100083, China
  • Received:2010-05-25 Revised:2010-09-30 Online:2011-05-22 Published:2011-05-20

PDF (PC)

1653

Abstract:

In the study, the 39Ar40Ar dating of volcanic rocks of Suhongtu Depression in YingenEjina Qi Basin yielded an age of (10555±403)(11271±206) Ma, indicating the rocks being the Early Cretaceous eruption products. The volcanic rocks in Suhongtu Depression and in Hongliuxia of Jiuxi Basin are the eruption products of the same period caused by the reactivation of the AltunEngeerwusu Fault in the Early Cretaceous (106113 Ma) according to the geochronology, but they might come from different mantle source regions according to their geochemical characteristics. More important, the study suggested that from the beginning of the activation of the Altun Fault to the volcanic eruptions in Suhongtu and Hongliuxia, the Altun Fault had at least extended northeastward to the Suhongtu area.

Key words:  , YingenEjina Qi Basin； Suhongtu Depression； Early Cretaceous； Altun Fault； Hongliuxia of Jiuxi Basin

CLC Number: