摘要
俯冲—增生型造山带弧前增生楔流体的特点为 :盐度低、氯化物含量异常低 ,并含有丰富的 CO2 和 CH4。流体以扩散式或沿断层带渠道式活动 ;泥火山、张裂隙充填脉、碳酸盐壳、深海生物群是流体活动的直接体现 ;流体活动影响着增生楔的内部结构和构造样式 ;
Fluids of forearc accretionary wedge in the orogene of subduction accretion are characterized by low salinity,anomalously low chloride concentration and sufficient CO 2 and CH 4.The patterns of fluids flow in accretionary wedge are diffused or focused flow along fault zones.Mud volcano,veins filled in fractures,carbonate crust and benthic biological communities are direct indications of fluid activities.While the fluid activities will affect the internal texture and structural factions of the accretoinary wedge.Hence,studying the features of fluid flow in accretional wedge is critical for the understanding of the geological evolution of orogenic belt and the origin of ore deposit.
出处
《地质科技情报》
CAS
CSCD
北大核心
2003年第1期7-12,共6页
Geological Science and Technology Information
基金
国家自然科学基金资助项目 (4 9972 0 74
40 172 0 71)
中国地质调查局项目 (DKD2 0 0 10 0 2 )
