摘要
日本富山县境内的中田浦滑坡剖面中产出以立方体为主要晶形的微小黄铁矿颗粒,它们多沿滑带土中的细裂缝分布。黄铁矿的产出状况、晶体形态以及滑带土的岩矿和地球化学特征均显示这些黄铁矿是滑带岩石粘土化作用过程的伴生产物,揭示滑带内的还原性氧化还原条件,它们总体受滑带的发生和发展所控制。因此,滑带土中的次生黄铁矿对于滑带土的形成具有特别的指相意义,有可能作为备选指标用来判断滑带的产生历史和发展进程,从而估计滑坡的发展演化。
Some special fine pyrite particles were discovered along the landslide profiles of the Nakataura Landslide located in Toyama Prefecture of Northwest Japan. These pyrite particles were mainly exhibited as cubic crystals and were enriched within the micro fractures of the slip zone. Their occurrence, crystalline features, and the petrologic and geochemical characters of sliding mud determined these pyrite particles as secondary minerals newly formed along with sliding mud formation within the sliding zone. All of these mineral and geochemical characteristics of the pyrite and sliding mud indicated a reducing condition within the slip zone that may receive impacts along with the landslide development. Therefore, such secondary pyrite within the sliding zone is potentially indicating the formation of sliding mud, which could be a parameter for estimating the evolution and progressing information of the landslide, and furthermore, it might be applied to predict the potential development and the activity of landslide.
出处
《地球化学》
CAS
CSCD
北大核心
2006年第2期201-210,共10页
Geochimica
基金
日本学术振兴会(P03066)
