Experimental investigation on the origin of carbonaceous materials in the fault zone of the Wenchuan earthquake  

作　　者：Deyang Shi Yaowei Liu Jin Shi 

机构地区：[1]Institute of Geophysics,China Earthquake Administration,Beijing 10081,China [2]National Institute of Natural Hazards,Ministry of Emergency Management of People's Republic of China,Beijing 10085,China [3]College of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China

出　　处：《Earthquake Science》2024年第3期189-199,共11页地震学报（英文版）

摘　　要：Carbonaceous materials in seismic fault zones may considerably influence seismic fault slip;however,the formation mechanism of carbonaceous materials remains unclear.In this study,we proposed a novel hypothesis for the formation of carbonaceous materials in fault gouge.Thus,we conducted a CO_(2) hydrogenation experiment in a high-temperature reactor at a co-seismic temperature,with fault gouge formed during the Wenchuan earthquake as the catalyst.Our experimental results demonstrate that carbonaceous materials in fault zones are formed on the fault gouge during the chemical reaction process,suggesting that the carbonaceous materials are possibly generated from the catalytic hydrogenation of CO_(2),followed by thermal cracking of its products.The results of this study provide a theoretical basis for understanding fault behavior and earthquake physics.

关 键 词：carbon dioxide hydrogenation carbonaceous mineral formation co-seismic temperature fault weakening fault gouge 

分 类 号：P315.7[天文地球—地震学]