摘要
冀东高板河中元古代多金属硫化物矿床呈层状和透镜状与容矿岩石整合产出 ,其中发育大量各种类型的硫铁矿叠层石 ,呈中、小型丘堆状分布在多金属硫化物矿床中。通过对其进行形态学及显微结构研究和激光拉曼光谱测试表明 ,高板河硫铁矿叠层石的形成环境明显不同于普通藻叠层石的生长环境 ,形成于局部强封闭还原的半深海环境中 ,远离透光带 ,是海底黑烟囱周围嗜热微生物周期性生长形成的原生微生物沉积构造。硫铁矿叠层石的形态与其所处的环境以及微生物的种类有关。
The Gaobanhe Mesoproterozoic polymetallic sulfide deposits in East Hebei were deposited conformably on Mesoproterozoic dolostone and black shales. Many types of pyritic stromatolites are distributed in polymetallic sulfide deposits in the form of bioherm. Pyritic stromatolites were studied by analyzing the ultrastructural morphologic characteristics and Laser Raman Specteoscopy. It is found that primary biogenic structure is preserved with pyritic stromatolites. They existed in a littoral environment. Thermophiles were flourishing in a reduced environment, which is quite close to the vents of hot water on seabed. They absorbed and enriched minerogenetic elements, reduced mineral materials from the vents, readjusted them biochemically and eventually formed pyritic stromatolites.
出处
《高校地质学报》
CAS
CSCD
2004年第4期562-568,共7页
Geological Journal of China Universities
基金
国家自然科学基金项目 (4 0 2 4 2 0 14
4 9832 0 30 )
北京大学 985项目资助
关键词
硫化物
硫铁矿叠层石
生物组构
成矿作用
中元古代
sulfide
pyritic stromatolite
biological fabric
mineralization
Mesoproterozoic
