|
|
|
| PROGRESS ON THE STUDY OF THE MIDDLE JURASSIC XINMIN FORMATION IN SOUTHEASTERN DAXINGANLING MOUNTAINS |
| DING Qiu-hong, WANG Jie, LI Xiao-hai, YAO Yu-lai, LI Wen-bo |
| Shenyang Institute of Geology and Mineral Resources, CGS, Shenyang 110034, China |
|
|
|
|
Abstract By means of field geological investigation, geological section survey, drilling core logging, fossil study and isotopic dating, combined with the comprehensive analysis of previous data, it is concluded that the Xinmin Formation is mainly a set of volcanic rocks and pyroclastic rocks with coal deposits, bearing mid flora of Coniopteris-Phoenicopsis, bivalve fossil assemblage of Ferganoconcha tomiensis-F. elongate and sporopollen assemblage of Osmundacidites-Lycopodiumsporites-Piceites, which belong to Middle Jurassic. The zircon U-Pb age of volcanic rocks is 161.6 Ma; while that of detrital rocks is between 175±2 Ma and 2537±20 Ma. The youngest age of detrital rocks (175±2 Ma) represents the lower deposition limit of Xinmin Formation. The research results would provide essential data and scientific basis for the Middle Jurassic stratigraphic classification and correlation, as well as the establishment and perfection of the Mesozoic stratigraphic framework in Southeastern Daxinganling Mountains.
|
|
Received: 01 February 2017
|
|
|
|
|
|
| [1] |
DU Bing-ying, LIU Yu-wei, ZHAO Ming-sheng, ZHANG Tie-an, ZHAO Yu-sheng, FENG Zhi-qiang, ZHEN Miao, LIU Yu-qi, LUO Jia-xin. DETERMINATION OF THE EARLY CRETACEOUS VOLCANIC STRATA IN EASTERN JAGDAQI, DAXINGANLING MOUNTAINS: Geological Implication[J]. GEOLOGY AND RESOURCES, 2018, 27(4): 317-323. |
|
|
|
|
2017, Vol. 26 
