摘要
湘西沃溪断裂为一具走向剪切滑移性质的脆性剪切带。地球化学资料表明:断裂作用过程中,带内物质组分的调整主要在其不同构造岩之间进行。断裂作用通过控制断裂内部物质组分的分布而导致稀土元素于断裂内不同构造岩之间发生明显的整体迁移和相对富集,同时,还引起稀土元素(特别是轻、重稀土之间和具变化合价的REE)发生分异,可称为稀土元素的构造应力分异效应。
The Woxl-fault in western Hunan is a brittle shear zone characterized by shearing—sliding along its strike. Geochemical data show that the adjustment of material composition in the fault mainly occurred between different tectonites during the faulting. Controlling the distrioution of material composition within the fault, the faulting caused the REE's overall migration and relative enrichment between different tectonites in the fault and also caused the REE (especially between LREE and HREE, and the REE with variable chemical combination valence) to undergo differentiation . It may be called' tectonic stress differentiation effect of REE'.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1991年第2期118-127,共10页
Geotectonica et Metallogenia
关键词
断裂带
构造
地球化学
稀土元素
tectonic stress, differentiation effect, REE, Woxi fault, western Hunan, China.
