Influence of volcanic activities to organic maturation in Jiufen-Chinkuashih Area.

• Main Authors: Yi-Cheng Lee, 黎易辰
• Other Authors: Louis L. Tsai
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/3as7sg

碩士 === 國立中央大學 === 應用地質研究所 === 96 === ABSTRACT Influencing factors of vitrinite reflectance include heated temperature and time, volcanic and hydrothermal activities, tectonic and burial deposition, etc. Organic miscelles decompose after being heated and leading to the increase of vitrinite reflectance. The influence of volcanic and hydrothermal activities is especially notice-worthy. Coal samples were collected from Jiufen-Jilong Shan and Fushan gold mine area in this study. Vitrinite reflectance and Rock-Eval pyrolysis were then performed to evaluate the influence of past igneous intrusion as well as hydrothermal deposits.Maximum and average heated temperature can thus be estimated. The results indicate that in the study area, Ro increased from 0.5-0.7% to 1.1-3.0% in the nearby of intruded igneous bodies, where as Ro increased up to 2.0~7.0% in areas close to hydrothermal ore deposits. Samples #1,3and4 were especially affected by hydrothermal deposits with Ro~5.59%. The heated temperatures were estimated as 500~600°C maximum and 460~560°C in average.