Characteristics and evolution of inertinite abundance and atmospheric pO_(2) during China's coal-forming periods  

作　　者：Dong-Dong Wang Lu-Sheng Yin Long-Yi Shao Da-Wei Lyu Hai-Yan Liu Shuai Wang Guo-Qi Dong 

机构地区：[1]College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,Shandong Province,China [2]College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China

出　　处：《Journal of Palaeogeography》2021年第2期259-283,共25页古地理学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (41972170, 41772096, 41402086);the Natural Science Foundation of Shandong Province (ZR2019MD021);the SDUST Research Fund(2018TDJH101)。

摘　　要：Coal, especially the inertinite in it, is highly sensitive to climate changes, showing an obvious response to paleoclimate conditions, in particular, to paleo-oxygen concentration(pO_2 ). In this study, the inertinite abundance data of typical coal-forming periods in China were systematically collected and analyzed. Its characteristics and control factors were studied, and its evolution was established. Based on inertinite abundance data, pO_2 evolution curves of various coal-forming periods in China were established, which fluctuated between 15% and 30% during the entire Phanerozoic. The inertinite abundance in coal deposits during Paleozoic in China was basically consistent with that of other areas of the world, while it was quite different globally from the Mesozoic to the Cenozoic. The results show that the inertinite abundance in coal deposits is controlled by pO_2 and other factors including climatic zones, plant differentiation, sedimentary environments, and tectonic activities. The inertinite abundance in coal deposits in China during the Jurassic was high, suggesting dry paleoclimate of inland China.

关 键 词：Inertinite abundance pO_2 Paleoclimate Sedimentary environment Coal-forming period Comparative analysis China 

分 类 号：P618.11[天文地球—矿床学]