| Geochemistry of recent hydrothermal systems of Mendeleev Volcano （Kuril Islands） and surrounding waters |
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| 作者姓名： | Oleg Chudaev Valentina Chudaeva Kenji Sugimori Akihito Kuno Motoyuki Matsuo |
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| 作者单位： | [1]Far East Geological Institute, Vladivostok, Russia [2]Pacific Institute of Geography, Vladivostok, Russia [3]Toho University, Tokyo, Japan |
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| 摘 要： | On the Kuril Islands there are 85 volcanoes, 39 of which are active. Hot springs and mud pots are wide spread in this area and have significant inputs on the chemical composition of the surrounding surface waters and environment. We present results of trace elements as well as data on H, O, S, and He isotope ratios for hydrothermal systems of the Mendeleev Volcano （Kunashir Island） and surrounding surface waters. Water and gas samples were taken from springs and holes as well as creeks and the Lesnaya River. Among the thermal water types, three main groups can be distinguished. The first group includes the waters, in which SO4^- ion predominant. The water temperature on the surface reaches 97℃, and TDS varies from a few g/L to 7 g/L. These waters are acid to superacid with pH values ranging 0.6 to 2.3. The second group is sodium-chloride waters. A maximum TDS is 14.2 g/L. The waters are neutral or alkaline; pH varies from 6.9 to 8.2. The third group is the sodium-chloride-sulfate-bicarbonate water. The Stolbovskie springs, located in the periphery of the Mendeleev Volcano are representative of this type. The pH of these waters is close to neutral. TDS is 1.9 g/L. They are rather the derivatives of sodium-chloride waters arisen from dilution of them by subsurface waters. The Kuslyi Creek and Lesnaya River are located near the Mendeleev Volcano. The most acid springs discharge into the Kislyi Creek as a result pH of this creek being 2.5, and contents of most elements rather high. For example, the contents of dissolved solids of Si, Fe, Al, Mn, Zn, in waters of the Kislaya Creek are 22.1, 8.1, 6.2, 1.29, and 0.28 mg/L, and correspondently. The water of the Lesnaya River, （Before the Kislyi Creek, pH is about 8 with TDS 102 mg/L, but after the Kuslyi Creek, pH decreases and the concentrations of chemical elements increase. Debit of the Kislayi Creek in summer season is about 370 L/sec. It means that every day only this small creek inputs in the Lesnay River about 706 kg of Si;
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| 关 键 词： | 火山 地球化学 水 活性 化学物质 |
Stream water chemistry and nitrogen export from a subtropical-forested catchment in Hunan in central-southern China |
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| Oleg Chudaev Valentina Chudaeva Kenji Sugimori Akihito Kuno Motoyuki Matsuo.Stream water chemistry and nitrogen export from a subtropical-forested catchment in Hunan in central-southern China[J].Chinese Journal of Geochemistry,2006,25(B08):211-211. |
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| Abstract: | |
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| Keywords: | Kuril Islands Mendeleev Volcano geochemistry of waters |
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