CAJ | 학술논문

对陆地泥火山流体来源及其向地表渗漏过程中的改造作用开展研究,有利于加深理解泥火山释放甲烷的碳排放过程。新疆准噶尔盆地南缘独山子泥火山柱状沉积物和地表沉积物的矿物和元素组成,以及沉积物孔隙水离子组成等的分析结果显示,泥火山沉积物孔隙水Na+和Cl–间具有很好的正相关性,具有比海水高的Na+/Cl–和Li+/Cl–值、低的K+/Cl–和Mg2+/Cl–。泥火山沉积物与围岩相比,富集伊利石、绿泥石和方解石,缺少蒙脱石,富集Ca、亏损Si,这些变化主要与黏土矿物的脱水转变有关。表明泥火山流体主要来源于深部低盐度沉积物孔隙水,但经历了地表的蒸发作用,并混合了大气降水。
대륙지니화산류체래원급기향지표삼루과정중적개조작용개전연구,유리우가심리해니화산석방갑완적탄배방과정。신강준갈이분지남연독산자니화산주상침적물화지표침적물적광물화원소조성,이급침적물공극수리자조성등적분석결과현시,니화산침적물공극수Na+화Cl–간구유흔호적정상관성,구유비해수고적Na+/Cl–화Li+/Cl–치、저적K+/Cl–화Mg2+/Cl–。니화산침적물여위암상비,부집이리석、록니석화방해석,결소몽탈석,부집Ca、우손Si,저사변화주요여점토광물적탈수전변유관。표명니화산류체주요래원우심부저염도침적물공극수,단경력료지표적증발작용,병혼합료대기강수。
Fluid sources and geochemical processes involved in terrestrial mud volcanoes are of great significance for understanding the chemical processes of methane emission to the atmosphere. Mud sediments ejected from the Dushanzi mud volcano, which is located along the southern margin of the Junggar Basin, northwestern China, were collected by hand core sampling. The ionic compositions of the pore fluids, minerals and major elements of the ejected sediments and surface sediments were analyzed. The results showed that significant correlation between Cl– and Na+ in pore fluids. Relative to seawater, the mud volcano fluids have higher ratios of K+/Cl–and Mg2+/Cl–and lower ratios of Na+/Cl–and Li+/Cl–. The mud sediments are enriched in illite, chlorite and calcite but depleted in smectite relative to the host rocks of the mud volcano. The changes in the mud and pore fluids are mainly related to clay mineral dehydration. The fluids were mainly derived from ancient sedimentary low salinity pore fluids, but modified by the surface evaporation and meteoric surface water.