摘要
国外一些地质学家提出风暴流沉积、风暴岩.强调系暴风(台风)的突变性与灾变性力量形成的沉积物.据笔者对旋涡流作用成因的观察与研究得知,旋风(台风、龙卷风、气旋)是形成旋涡流的动力源之一.但旋风本身不能直接在海水中摄取砂粒形成沉积物,必须通过海水旋涡流作用,才能形成沉积,这又有违风暴流沉积说原意,而变成旋涡流沉积作用了.况且,旋风流动速度可与声速相当,延续时间短,形迹不定,不易搬运与形成沉积物.
The concept tempestites is currently used at home and abroad which' s original word is 'tempest', but the usuage of 'tempest'is not as often as 'storm'in metorology.The word storm, which emphasized catastrophic charicter, means cyclone (tornado, typhone, oneway windstorn) and its flow speed is just as the same as sound speed. Cyclone can promote and influence ocean water in the track area to form vortex with the same track as cyclone itself.But the cyclone can not form sediments directly from sands in ocean wates, it can only affects the sediments of coceanwater by seperation, sorting transportation, so the name of ' tempestities' is not suitable. Cyclone is only one of the factors of vortex forming, its life is short and the track is not steady. The function of wind is emphasized when tempesites is named, but the function of oceanwater can' t be seen in it, this problem is worth to discuss.
In addition, the theory which whirling currents can transport sands from coast (intertidal zone) into the ocean for tens to one hundred kilometres far is analyzed and observed actually, it indicated that the en-ergy of whirling currents is weak and can' t be signifcant sediments transporting factor.
出处
《沉积学报》
CAS
CSCD
北大核心
1991年第2期121-126,共6页
Acta Sedimentologica Sinica
