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Geochemical characteristics of hot spring water in Bajawa area, central Flores, Indonesia

机译:印度尼西亚弗洛雷斯中部Bajawa地区的温泉水的地球化学特征

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摘要

Water and gas samples taken from hot and cold springs, streams, rainfall and fumaroles were analyzed geochemically to assess the geothermal resources of the Bajawa area, central Flores Island, eastern part of the Nusa Tenggara Islands, eastern Indonesia. Five pro spective manifestation areas, Mataloko, Nage-Keli Tiworiwu-Wolo Bobo, Soka, Mengeruda, Gou-Tukapela, are near three active volcanoes, Inerie, Inie Lika and Ebulobo and more than 30 monogenetic volcanoes. One hot spring, Mbay, is near the northeastern seashore. Temperatures of the hot springs were >90 deg C at the Mataloko, >75 deg C at the Nage, >70 deg C at the Keli Tiworiwu, >60 deg C at the Mbay and 40 to 45 deg C at the other areas. Geochemical characteristics of most hot water were acid sulfate type, except for Nage hot water, which is acid sulfate-chloride type. Origin of dissolved sulfate and chloride of acid hot springs was relatively low temperature volcanic gases containing hydrogen sulfide gases and interstitial water in acid alternation zone. However, dissolved sulfate and chloride of Nage hot springs may be from high temperature volcanic gases, which contain hydrogen chloride and sulfur dioxide, and interstitial water in the acid alternation zone and volcanic ash.
机译:对来自温泉和冷泉,溪流,降雨和喷气孔的水和天然气样品进行了地球化学分析,以评估印度尼西亚东部努沙登加拉群岛东部的弗洛雷斯岛中部Bajawa地区的地热资源。 Mataloko,Nage-Keli Tiworiwu-Wolo Bobo,Soka,Mengeruda,Gou-Tukapela这五个潜在的表现区域靠近三个活火山,即Inerie,Inie Lika和Ebulobo以及30多个单系火山。一个温泉,Mbay,在东北海岸附近。温泉的温度在Mataloko高于90摄氏度,在Nage高于75摄氏度,在Keli Tiworiwu高于70摄氏度,在Mbay高于60摄氏度,其他地区则为40至45摄氏度。除纳格热水为酸性硫酸盐-氯化物类型外,大多数热水的地球化学特征为酸性硫酸盐类。酸性温泉中溶解的硫酸盐和氯化物的来源是在酸性蚀变带中相对较低温度的火山气体,其中含有硫化氢气体和间隙水。但是,纳奇温泉中溶解的硫酸盐和氯化物可能来自高温火山气体,其中含有氯化氢和二氧化硫,以及在酸性交替带和火山灰中的间隙水。

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