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引用本文:张捷.川西北岷山灰岩区喀斯特堰塞湖形成中的生物作用.湖泊科学,1993,5(1):32-39. DOI:10.18307/1993.0105
Zhang Jie.On bio-effects on the development of karst dammed lakes in limestone are as, m1nsh an mountain range, nw sichuan. J. Lake Sci.1993,5(1):32-39. DOI:10.18307/1993.0105
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川西北岷山灰岩区喀斯特堰塞湖形成中的生物作用
张捷
南京大学大地海洋科学系, 南京 210008
摘要:
川西北岷山灰岩区内的喀斯特堰塞湖是-种特殊的湖泊地貌类型,它是在一定的地质地貌条件及水化学条件下由生物作用参与并促进生物型灰华的快速沉积并堰塞河道而成。野外沉积构造和湖泊形态观察、水化学分析及室内对灰华体的光学显微镜和扫描电镜的观察结果表明,生物作用以多种方式存在着。多种生物(苔藓、藻类、灌草丛等)在生物型灰华堤堰的形成(也即喀斯特堰塞湖的形成)过程中的不同生物作用(包括同化作用、拦截作用、毛管作用、捕获粘结作用及构架作用)贯穿于灰华沉积的复杂循环过程之中。
关键词:  喀斯特堰塞湖  石灰华  生物作用  川西北
DOI:10.18307/1993.0105
分类号:
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On bio-effects on the development of karst dammed lakes in limestone are as, m1nsh an mountain range, nw sichuan
Zhang Jie
Dept.of Geo-and Ocean Sciences, Nanjing University, Nanjing 210008
Abstract:
The karst dammed lakes in limestone area of Minshan Mountain Range, NW Sichuan, belong to a special kind of lake morphology. They developed and were formed under certain geological, geomorphological and hydrochemical conditions with bio-effects as result of rapid tufa dam gradation in stream channel. With field observation on the sedimental structure, lake morphology and water chemistry as well as optical & Scanning Electronic Microscopic observation on tufa samples from the research area, various kinds of bio-effects have been identified to exist in the process of tufa dam formation. It is shown in the general cycle model proposed in this paper that many organisms (mosses, algae and bushes etc.) with various effects (assimilation, interceptionr capillary effects trapping & bindings and shoring effect) on tufa deposition play an important role throughout the compound cycle process of tufa dam gradation (i. e. the formation of karst dammed lakes) in the stream channels in the research areas.
Key words:  karst dammed lakes  tufas  bio-effects  NW sichuan
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