Preface to the Special Issue on Geochemical Investigations on Geohazards
Resource
Terrestrial, Atmospheric and Oceanic Sciences 16 (4): I-VI
Journal
Terrestrial Atmospheric and Oceanic Sciences
Pages
0
Date Issued
2005
Date
2005
Author(s)
Yang, Tsanyao Frank
Chen, Cheng-Hong
Liu, Tsung-Kwei
Abstract
Geological hazards (Geohazards), when triggered by earthquakes and volcanic eruptions, usually cause severe damage and can result in huge casualties. Unfortunately, these natural hazards are often unexpected, seemingly unavoidable and frequently catastrophic in their im-pact on living environments. However, if such natural attacks can be detected in advance with a full understanding of their causes and processes, mitigations can then be taken to avert the worst effects. The key to understanding such geohazards lies in recognizing connective patterns and linking different precursory phenomena together. In addition to geological and geophysical surveys, geochemical investigations, particularly along fault systems, can provide useful and even crucial clues toward this effort. In recent decades, many on-site and in situ geochemical measurements, and delicate laboratory analyses have become possible due to significant im-provements in analytical techniques. Large amounts of geochemical data have been accumu-lated and integrated giving feasibility to the prospect of hazard mitigation through our better understanding of the processes involved. After the 1999 Chi-Chi earthquake hit Taiwan causing thousands of casualties many in-vestigations and systematic studies on geohazards, especially on earthquakes and active faults have been conducted in Taiwan. Many special issues relevant to this subject have been published, however, most are focused on geological and geophysical results and discussions (e.g., Cen-
Type
journal article
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