The net primary productivity of Mid-Jurassic peatland and its control factors: Evidenced by the Ordos Basin  

作　　者：Wang Dongdong Yan Zhiming Liu Haiyan Lv Dawei Hou Yijun 

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

出　　处：《International Journal of Mining Science and Technology》2018年第2期177-185,共9页矿业科学技术学报（英文版）

基　　金：provided by the National Natural Science Foundation of China (No. 41402086);the Colleges Scientific Research Projects of Shandong Province (No. J14LH06);the provincial excellent young talents in colleges and universities in Shandong Province natural science foundation of the mutual funds (No. ZR2015JL016);State key research and development plan (No. 2017YFC0601400)

摘　　要：Using the large-scale thick 4# coal seam from the Mid-Jurassic in the southern Ordos Basin as an example, this paper studied the net primary productivity(NPP) level of the Mid-Jurassic peatland, and discussed its control factors. Geophysical logging signals were used for a spectrum analysis to obtain the Milankovitch cycle parameters in coal seam. These were then used to calculate the accumulation rate of the residual carbon in 4# coal seam. The carbon loss can be calculated according to the density and residual carbon content of 4# coal seam. Then, the total carbon accumulation rate of the peatland was further derived, and the NPP of peatland was determined. The results show that the NPP of MidJurassic peatland is higher than that of Holocene at the same latitude. Comprehensive analysis indicates that the temperature, carbon dioxide and oxygen levels in atmosphere are the main control factors of the NPP of Mid-Jurassic peatland.Using the large-scale thick 4# coal seam from the Mid-Jurassic in the southern Ordos Basin as an example, this paper studied the net primary productivity(NPP) level of the Mid-Jurassic peatland, and discussed its control factors. Geophysical logging signals were used for a spectrum analysis to obtain the Milankovitch cycle parameters in coal seam. These were then used to calculate the accumulation rate of the residual carbon in 4# coal seam. The carbon loss can be calculated according to the density and residual carbon content of 4# coal seam. Then, the total carbon accumulation rate of the peatland was further derived, and the NPP of peatland was determined. The results show that the NPP of MidJurassic peatland is higher than that of Holocene at the same latitude. Comprehensive analysis indicates that the temperature, carbon dioxide and oxygen levels in atmosphere are the main control factors of the NPP of Mid-Jurassic peatland.

关 键 词：Net primary productivity(NPP) PEATLAND MILANKOVITCH cycle Carbon accumulation rate Mid-Jurassic 

分 类 号：TD[矿业工程]