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Table 1 Composition of ash leachate, salt materials, crater lake water, and dried crater lake water

From: Salt shell fallout during the ash eruption at the Nakadake crater, Aso volcano, Japan: evidence of an underground hydrothermal system surrounding the erupting vent

Sample type Sample no. Sampling date (yyyy/mm/dd) Temp# (°C) Method F (mg/kg) Cl (mg/kg) SO4 (mg/kg) Na (mg/kg) K (mg/kg) Mg (mg/kg) Ca (mg/kg) SiO2 (mg/kg) T-Fe$ (mg/kg) Al (mg/kg)
Salt flakea S110518-0 2011-5-18   IC 36,794 25,631 317,641 17,380 2891 18,865 24,779    
Salt flakea S150518-1 2011-5-18   IC 47,451 12,327 353,902 19,231 1700 23,934 11,192    
Salt flakea S110518-2 2011-5-18   IC 41,905 17,146 358,306 18,966 1807 24,249 12,753    
Salt flakea S110519 2011-5-19   IC 46,032 16,541 391,964 20,195 3173 27,072 6898    
White salta S141227 2014-12-27   IC 4186 527,412 13,325 327,602 4288 311 1718    
Salt shella S150113 2015-1-13   IC 36,125 46,002 255,798 21,356 3765 19,072 1707    
Salt shella S150317 2015-3-17   IC 26,174 75,124 163,225 22,620 3270 23,130 4988    
Salt shella S150320 2015-3-20   IC 25,089 83,026 191,171 19,636 2563 26,858 881    
Salt lumpa S150327 2015-3-27   IC 34,630 106,140 311,211 25,457 4260 42,280 751    
Salt flakea S110518-0 2011-5-18   EDS 46,300 35,200 635,577* 21,700 15,400 24,700 12,900 34,435 87,700 71,100
Salt shella S150113 2015-1-13   EDS 19,500 32,000 298,479* 12,000 44,300 14,700 18,400 98,384 282,700 47,700
Salt shella S150113 2015-1-13   EDS 13,900 39,900 381,107* 10,300 50,800 15,800 7000 23,741 281,100 40,000
Salt shella S150113 2015-1-13   EDS 20,800 42,000 381,406* 11,100 48,400 19,500 4600 16,469 213,300 42,600
Salt shella S150113 2015-1-13   EDS 15,500 72,200 391,585* 37,100 28,800 54,900 5000 24,596 149,700 27,900
Salt shella S150113 2015-1-13   EDS 13,000 39,700 351,768* 10,400 50,000 16,000 12,500 34,435 274,100 40,500
Salt shella S150113 2015-1-13   EDS 12,500 133,300 322,728* 74,800 34,200 18,300 0 7914 209,600 34,700
Salt shella S150113 2015-1-13   EDS 29,000 34,200 362,246* 9400 38,700 16,100 0 18,607 204,400 46,200
Salt shella S150113 2015-1-13   EDS 0 43,500 386,196* 10,100 49,100 19,900 0 9197 218,700 41,400
Salt shella S150317 2015-3-17   EDS 143,800 13,000 380,807* 10,300 500 3,800 1400 10,694 11,800 102,700
Salt shella S150317 2015-3-17   EDS 64,500 91,300 272,433* 30,700 5900 52,200 3400 27,163 116,500 34,800
Salt shella S150317 2015-3-17   EDS 46,900 73,600 237,705* 24,900 8100 39,300 7600 75,072 119,500 36,300
Salt shella S150317 2015-3-17   EDS 55,700 106,200 312,250* 30,400 6600 55,000 5900 42,990 159,300 39,500
Lake waterb LW080704+ 2008-7-4 71.6 IAM 5790 38,000 59,700 2410 903 3010 1810 363 4920 6880
Lake waterb LW090212 2009-2-12 56.4 IAM 6550 44,300 66,700 2740 1060 3540 1970 344 5860 8430
Lake waterb LW090324 2009-3-24 60.0 IAM 6928 46,944 74,408 2920 1128 3592 3208 348 6464 8640
Lake waterb LW100825 2010-8-25 79.1 IAM 13,700 60,600 131,000 5520 2650 7120 300 435 10,600 17,400
Lake waterb LW111206 2011-12-6 61.8 IAM 5180 22,499 40,600 1982 732 2849 1184 530 3460 4640
Lake waterb LW120329 2012-3-29 71.7 IAM 7670 36,000 62,400 2720 1120 3690 1130 580 5020 7690
Lake waterc LW100825A 2010-8-25   IC 15,722 76,632 160,077 7707 5945 9393 2465    
Lake waterc LW111206A 2011-12-6   IC 5500 24,249 45,970 2204 1272 2934 1662    
Lake waterc LW120329A 2012-3-29   IC 8702 41,721 74,972 3323 2256 4194 1957    
Dried LWd LW100825B 2010-8-25   IC 16,162 18,778 166,096 8029 5599 9637 2420    
Dried LWd LW111206B 2011-12-6   IC 5411 3691 46,466 2365 1400 2951 1790    
Dried LWd LW120329B 2012-3-29   IC 8689 3944 75,141 3413 2234 4210 1999    
Ash leachatee Ash141127 2014-11-27   IC 375 175 1481 257 32 43 798    
Ash leachatee Ash141210 2014-12-10   IC 63 95 924 131 5 32 381    
Ash leachatee Ash151112 2015-1-12   IC 155 452 1367 273 39 83 525    
Ash leachatee Ash150113 2015-1-13   IC 144 334 3649 417 59 183 992    
Ash leachatee Ash150223 2015-2-23   IC 600 445 3008 588 49 199 1069    
Ash leachatee Ash150224 2015-2-24   IC 776 279 4212 472 86 264 1325    
Ash leachatee Ash150225a 2015-2-25   IC 224 207 5242 336 56 320 1322    
Ash leachatee Ash150225b 2015-2-25   IC 285 387 6164 487 115 307 1473    
Ash leachatee Ash150317 2015-3-17   IC 305 210 1176 221 24 60 615    
Ash leachatee Ash150320a 2015-3-20   IC 204 84 376 174 17 42 177    
Ash leachatee Ash150320b 2015-3-20   IC 152 383 2234 314 47 126 714    
Ash leachatee Ash150320c 2015-3-20   IC 437 923 5960 504 123 263 2044    
Ash leachatee Ash150221 2015-3-21   IC 3419 5335 69,354 2402 269 1865 18,605    
Ash leachatee Ash150429 2015-4-29   IC 188 241 982 200 18 83 408    
  1. IC ion chromatography, IAM ion chromatography + atomic absorption spectroscopy + molecular absorption spectroscopy, EDS energy-dispersive X-ray spectroscopy. Multiple spots of the same sample were analyzed by EDS, and the data of each spot are listed
  2. Blank cell: no data, 0: not detected, #: temperature of the lake, $: total Fe. *: S wt.% obtained by the EDS analyses are recalculated as the weight % of SO4, +: data cited from Miyabuchi and Terada (2009)
  3. aConcentrations are calculated relative to the whole sale materials including insoluble components
  4. bConcentration in water sample
  5. cRe-analyses of the stored sample. Concentration in water sample
  6. dDried lake water samples are dissolved in pure water of the original volume
  7. eConcentrations are calculated relative to the ash weight