Laboratory experiments of carbon mineralization potential of the main terrestrial basalt reservoirs in China  

作　　者：Yanning Pan Yunhua Liu Zengqian Hou Qiang Sun Nianzhi Jiao Guochen Dong Jihua Liu Gaoxue Yang Huiting Zhang Hailiang Jia Hao Huang 

机构地区：[1]School of Earth Science and Resources,Chang’an University,Xi’an 710054,China [2]College of Geology and Environment,Xi’an University of Science and Technology,Xi’an 710054,China [3]Institute of Geology,Chinese Academy of Geological Sciences(CAGS),Beijing 100037,China [4]Innovation Research Center for Carbon Neutralization,Fujian Key Laboratory of Marine Carbon Sequestration,Xiamen University,Xiamen 361102,China [5]School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China [6]Institute of Marine Science and Technology,Shandong University,Qingdao 266237,China

出　　处：《Geoscience Frontiers》2025年第1期189-208,共20页地学前缘(英文版)

基　　金：funded by National Natural Science Foundation of China(General Program No.41872219 and Grant No.42303052);the National Key R&D Program of China(No.2023YFE0120500);funded by the Major Project of Inner Mongolia Science and Technology,China(Grant No.2021ZD0034);supported by Science and Technology Plan Projects in Shaanxi Province,China(No.2023-JC-YB-236).

摘　　要：Against the background of realizing the goal of“carbon peaking and carbon neutrality”,using basaltic rocks for carbon mineralization is one of the most promising approaches to reduce the rise in atmospheric CO_(2)concentrations.This study conducted a series of experiments to assess carbon mineralization in nine basalt samples from the main terrestrial basalt reservoirs in China within CO_(2)-H2O/brine-rock systems at low temperatures(≤35℃).The results indicate that the secondary carbonates formed in the CO_(2)-H2O/brine-basalt system are predominantly calcite rather than Mg-carbonate minerals at low temperatures(≤35℃).Hence,at low temperatures(≤35℃),basalt rich in Ca-bearing minerals promotes the formation of stable carbonate minerals more effectively than basalt containing Mg-bearing minerals.Furthermore,under conditions of low temperatures(≤35℃)and pressures of approximately 3 MPa,the results suggest that alkaline olivine basalt,with a higher content of Ca-minerals and typical alkaline minerals(nepheline and Na-sanidine),exhibits the highest pH value and the highest amount of calcite.Hence,the alkaline minerals,nepheline and Na-sanidine,serve as pH buffers to increase the pH and promote the precipitation of calcite within CO_(2)-H2O-basalt systems at low temperatures(≤35℃).Among the nine evaluated basalts,basalt from the Shandong Linqu-Changle volcanic basin exhibits the highest rate of carbon mineralization at low temperatures(≤35℃).Hence,Cenozoic alkaline olivine basalt from Shandong Linqu-Changle volcanic basin is one of the most promising basalt reservoirs in China for future in-situ carbonation.As for ex-situ carbonation,compared with olivine,diopside or Ca-plagioclase may be more appropriate for increasing ocean negative emissions.

关 键 词：BASALT CALCITE CO_(2)storage Mineral carbonation Negative emissions 

分 类 号：P58[天文地球—岩石学]