CAJ | 학술논문

热液伴生气体组成对分析热液来源,评估热液区岩浆活动的活跃程度,进而评估其生态环境效应具有重要意义。利用自制的活塞式水中游离气体取样器采集台湾龟山岛和绿岛上热液喷口热液活动伴生气体样品,采用MAT271型质谱计对其组分进行了分析。结果表明,龟山岛热液区热液活动伴生气体以 CO2为主,显示出高含量CH4、CO2和H2S等活性气体,低含量SO2、HCl等低温火山区温泉释放气体的特点；2011年龟山岛白泉喷口和黄泉喷口热液气体中CO2、N2、CH4的平均含量分别为642.8‰、149.4‰、177.5‰和740.1‰、36.7‰、30.9‰。绿岛陆上热泉热液活动伴生气体以惰性气体N2为主,富含CH4,较少CO2、H2S等活性气体；2012年绿岛朝日温泉煮蛋区和绿岛潮间带近岸侧温泉池的热液气体中 CO2、N2、CH4的平均含量分别为1.1‰、805.8‰、126.9‰和34.4‰、7.9‰、899.5‰。推测龟山岛附近海域热液区伴生气体来源比绿岛陆上热泉伴生气体可能更深,前者在向上运移的过程中与围岩的反应弱于后者。
열액반생기체조성대분석열액래원,평고열액구암장활동적활약정도,진이평고기생태배경효응구유중요의의。이용자제적활새식수중유리기체취양기채집태만구산도화록도상열액분구열액활동반생기체양품,채용MAT271형질보계대기조분진행료분석。결과표명,구산도열액구열액활동반생기체이 CO2위주,현시출고함량CH4、CO2화H2S등활성기체,저함량SO2、HCl등저온화산구온천석방기체적특점；2011년구산도백천분구화황천분구열액기체중CO2、N2、CH4적평균함량분별위642.8‰、149.4‰、177.5‰화740.1‰、36.7‰、30.9‰。록도륙상열천열액활동반생기체이타성기체N2위주,부함CH4,교소CO2、H2S등활성기체；2012년록도조일온천자단구화록도조간대근안측온천지적열액기체중 CO2、N2、CH4적평균함량분별위1.1‰、805.8‰、126.9‰화34.4‰、7.9‰、899.5‰。추측구산도부근해역열액구반생기체래원비록도륙상열천반생기체가능경심,전자재향상운이적과정중여위암적반응약우후자。
Gas composition is important for analyzing the origin of hydrothermal activity, for assessing active magma level and for evaluating eco-environmental effects of hydrothermal activity. In this study, we obtained gas samples from submarine hydrothermal systems off Guishandao and in coastal hot springs off Lüdao in Taiwan using self-made piston gas samplers. The chemical compositions of these gas samples were measured using MAT271 mass spectrometer. The main component of gases from Guishandao hydrothermal area is CO2, characterized by low temperature volcanic zone with high content of CH4 and active gases of CO2 and H2S, and low levels of SO2 and HCl. In 2011, the average contents of CO2, N2 and CH4 from white vents are 642.8 ‰, 149.4 ‰, and 177.5 ‰, respectively; those from yellow vents are 740.1 ‰, 36.7 ‰, and 30.9 ‰, respectively. The gas samples of Lüdao hot springs are dominated by N2 and enriched in CH4. The contents of active gases such as CO2 and H2S are relatively low. In 2012, the average contents of hydrothermal gases CO2, N2 and CH4 of Zhaori egg boiling hot spring district are 642.8‰, 149.4 ‰, and 177.5 ‰, respectively; those from inshore side hot spring of intertidal zone are 740.1 ‰, 36.7 ‰, and 30.9 ‰, respectively. The gas from Guishandao area is originated from deeper stratum than that from Lüdao hot springs, and has reacted with surrounding rock less violently during upwelling.