Characterization of the Pleistocene Volcanic Chain of the Bicol Arc, Philippines: Implications for Geohazard Assessment

Andal, Eric S.; Yumul, Graciano P.; Listanco, Eddie L.; Tamayo, Rodolfo A.; Dimalanta, Carla B.; Ishii, Teruaki

doi:10.3319/tao.2005.16.4.865(gig)

Cited by 27 publications

(24 citation statements)

References 32 publications

(32 reference statements)

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“…A number of studies have pointed out that the composition of volcanic gas along with some reactive gas ratios changed dramatically before eruption (e.g., Noguchi and Kamiya 1963;Casadevall et al 1983;Walker 1974;Oskarsson 1984). Integrated with other available data/investigations, the information can be used for further geohazard assessment and mitigation in susceptible areas (e.g., Aramaki 1991;Andal et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Fumarolic Gas Composition of the Tatun Volcano Group,Northern Taiwan

Lee¹,

Yang²,

Lan³

et al. 2005

Terr. Atmos. Ocean. Sci.

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Hsiao-you-keng and Liou-huang-ku were selected as testing sites to discuss factors pertaining to weather and sampling time as these may affect fumarolic gas composition. Test results show that the length of sampling time in this area mainly depends on the saturation of alkali solution. Furthermore, based on continuous data, gas composition of fumaroles seems not to be affected by weather factors. This implies that the de-gassing system in the Tatun volcanic area is quite steady and generated no significant variation in gas composition during the study period. These results indicate that current sampling and analytical procedures are suitable for volcanic gas study and further surveillance in the Tatun volcanic area.

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Section: Introductionmentioning

confidence: 99%

Fumarolic Gas Composition of the Tatun Volcano Group,Northern Taiwan

Lee¹,

Yang²,

Lan³

et al. 2005

Terr. Atmos. Ocean. Sci.

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“…In this way, the effects of flood events resemble failure of tailing ponds, though in the latter case, the contamination is usually more intense, but also more restricted to the immediate vicinity of the riverbed. The areal restriction of the effects of flood events to river beds and adjacent lowlands distinguishes the environmental affects from those brought about for example by volcanism, where ash fall affects much larger areas (e.g., Andal et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Pollution Downstream of Old Mining Camps as a Result of Flood Events: an Example from the Mulde River System, Eastern Part of Germany

Knittel¹,

Klemm²,

Greif³

2005

Terr. Atmos. Ocean. Sci.

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Floods occurring as a consequence of very heavy rainfall in the southeastern part of Germany resulted in the erosion of waste dumps and tailings along the Mulde river system. Components derived from these sources, e.g., slags and charcoal, can clearly be recognized downstream in the flood sediments. As a consequence, the flood sediments contain in part extreme concentrations of heavy metals (up to 14,000 ppm Pb), As (up to 8,000 ppm), and U (up to 47 ppm) in the clay fraction. However, due to the origin of the contaminants, coarser grain fractions likewise contain extreme, though generally lower, concentrations of toxic elements. Initial leaching experiments show, that the toxic elements are readily leached from both, the clay fraction and from coarser fraction. Hence flood sediments contaminated by material derived from waste dumps and tailings constitute a considerable risk for land use.

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“…Geochemical investigations can help to better understand the origin and/or source of the natural hazards (e.g., Andal et al 2005;Etiope et al 2005a, b;Knittel et al 2005;Lee et al 2005;Pecoraino and Giammanco 2005). Especially, tritium concentrations can well constrain the source and age of groundwater in one area.…”

Section: Introductionmentioning

confidence: 99%