【摘要】：長白山天池火山位于歐亞板塊與太平洋板塊相互作用的弧后構造環(huán)境，即華北板塊北東緣與中新生代北東向濱太平洋的火山構造帶交界處。自2002年以來，天池火山區(qū)地震頻率增強、強度上升，同時，溫泉水溫度升高，地形變較大，，需加強對天池火山區(qū)活動性的監(jiān)測。 本文在測試了長白山天池火山區(qū)聚龍溫泉和錦江溫泉的氣體成分的基礎上，探討了天池火山區(qū)溫泉氣體組分特征與來源；同時，通過分步加熱法釋放該區(qū)火山巖的流體揮發(fā)分，并分析其組成特征和來源。火山氣體地球化學的測試結果表明，聚龍溫泉的溫度（71.1℃），化學組成包括He（7×10-6）、CO2（83.02%）含量，以及3He/4He比值（3.92Ra)均低于往年測試結果；然而，相比于2012-2013年，錦江溫泉的溫度（58.3℃）、He（133×10-6）、CO2（94.06%）、3He/4He比值（5.81Ra)，呈現增高的趨勢�；鹕綆r的流體揮發(fā)分δ13CCH4值和δ13CC2H6值分別為-48.5‰～-30.6‰和-31.6‰～-21.3‰，所有樣品均符合δ13CC2H6＜δ13CCH4的正碳同位素序列；其δ13CCO2值為-27.2‰～-11.4‰，均小于-10‰。 1999年至今的觀測結果顯示，兩個溫泉上述參數總體上較穩(wěn)定。根據溫泉氣體的主微量及同位素組成，我們認為錦江溫泉和聚龍溫泉中逸出的氣體為幔殼混合來源，其中錦江溫泉受殼源物質的影響相對較小，而聚龍溫泉逸出的氣體含有較高的殼源物質，幔源物質的貢獻相對較小。通過分步加熱法釋放的火山巖中的烷烴氣和CO2均為有機成因。
[Abstract]:Changbai Mountain Tianchi volcano is located in the back-arc tectonic environment of the interaction between Eurasian plate and Pacific plate, that is, the junction of the north-eastern margin of the North China plate and the North-east to coastal Pacific volcanic tectonic belt of the North China plate. Since 2002, the frequency and intensity of earthquakes in Tianchi volcanic area have increased, at the same time, the temperature of hot spring water has increased and the topography has become larger, so it is necessary to strengthen the monitoring of the activity of Tianchi volcanic area. On the basis of testing the gas composition of Julong hot spring and Jinjiang hot spring in Tianchi Huoshan District, Changbai Mountain, this paper discusses the characteristics and sources of hot spring gas components in Tianchi Huoshan District, and releases the fluid volatile matter from volcanic rocks in this area by step heating method, and analyzes their composition characteristics and sources. The results of volcanic gas geochemistry show that the temperature (71. 1 鈩

本文編號：2497347