CHARACTERISTICS OF HELIUM ISOTOPES IN CO_2 GAS IN THE YAOJIE COALFIELD AND ITS SIGNIFICANCE  

作　　者：陶明信 徐永昌 陈发源 沈平 孙明良 

机构地区：[1]Lanzhou Institute of Geology, Academia Sinica, Lanzhou 730000, PRC

出　　处：《Chinese Science Bulletin》1992年第2期126-130,共5页

基　　金：Project supported by the National Natural Science Foundation of China (Youth)and the Foundation of Laboratory of Biogeochemistry and Gasgeochemistry, Academis Sinica.

摘　　要：Ⅰ. INTRODUCTION The Yaojie Coalfield is situated in Honggu District of Lanzhou, Gansu Province. It is a coal-bearing fault basin formed on the basis of the fossil upwarping of the Mid-Qilian Mountains in the Jurassic period. The Jurassic deposits accumulated directly on the metamorphic rock system of the Precambrian Huangyuan Group in which the Middle

关 键 词：helium ISOTOPE CRUST source GAS CO₂ outburst. 

分 类 号：N[自然科学总论]