The Gener ationa lM echanism of Orientating Sedimentary Structure by In terna l2 waves
-
摘要: 深海大型沉积物波的发现,引起了国内外内波成因理论的兴起和发展。研究认为,内波作用于海底时可对海底沉积物进行改造,形成指向沉积构造,这种指向沉积构造可为单向、双向或多向,而其中与内波传播方向相反的反向沉积构造可能是内波沉积所特有的。对于这种反向沉积构造的形成,以LaFond的理论为代表,认为内波引起的底流水平流速反比于密度界面距海底的高度,波谷接近海底,因而可形成反向沉积构造。经研究分析,发现内波与表面波在本质上具有一定的相似性,因而认为用一般意义上的波动理论来解释内波沉积中指向沉积构造的形成机理更加易于理解。明确指向沉积构造的形成机理对于内波沉积的识别具有重要意义。Abstract: The discovery of the large sedimentary-waves in deep water, caused the generations and the developments of internal-waves both home and abroad. The study shows that internal-waves can shape the sediments on seafloor and form orientating sedimentary structure. This kind of structure includes single-direction, double-directions and multi-directions. Maybe the returning structure is the special character of internal-waves. LaFond s' theory about the gener- ation of this kind of structure is widely accepted. The theory indicates that the velocity of bottom currents formed by internal-waves is reverse ratio to the distance between the density interface and the seabed. Return ing transport is the main trends of internal-waves because the trough ofwave is close to the seafloor. The research conc ludes that in ternal-waves are similar homology of surface-waves and the genera tion of the orientating sedimentary structure formed by internal-wave can be exp lained clearly by the general fluctuation theory successfully. The generationmechanism of orientating sed imentary structure is very important to the recognition of the internal- waves sediments
-
Key words:
- internal-waves /
- orientating sedimentary structure /
- surface-waves
-
[1] 1 Flood R D. Studies of Deep-sea sedimentary microtopology in the North Atlantic ocean[D].Unpublished Doctoral Thesis WHOI/MIT Woods Hole MA,1978.
2 McCcve I N,Tucholke B E. Deep current-controlled sedimentation in the western North Atlantic Region, GSA[J].The Geology of North America,1986.593-610.
3 高振中,何幼斌,罗顺社,郭建华. 深水牵引流沉积--内潮汐、内波和等深流沉积研究[M].北京:科学出版社,1996.
4 何幼斌,高振中. 内潮汐、内波沉积的特征与鉴别[J].科学通报,1998,(09):903-908.
5 何幼斌,高振中,李建明. 浙江桐庐晚奥陶世内潮汐沉积[J].沉积学报,1998,(01):1-7.
6 LaFond E C. Internal Waves[A].London: Wiley Interscience,1962.731-751.
7 Shepard F P,Marshall N F,Mcloughlin P A,Sullivan G G. Currents in submarine canyons and other seavalleys[J].AAPG Studies in Geology,1979.1-13.
8 张兴阳,高振中,姚雪根. 北大西洋洛克尔海槽东北部内波沉积[J].沉积学报,1999,(03):464-472.
9 张兴阳,何幼斌,罗顺社,别必文. 内波单独作用形成的深水沉积物波[J].古地理学报,2002,(01):83-89.
10 杭桂生. 水面波的波形曲线[J].徐州师范大学学报（自然科学版）,1995,(03):34-36.
11 Benielli D,Sommerial J. Excitation and breaking of internal gravity waves by parametric instability[J].Journal of Fluid Mechanics,1998,(0):117-144.
12 LaFond E C. Internal waves[A].New York: Reinhold,1966.402-408.
13 LaFond E C. Internal waves[A].London: Wiley Interscience,1962.731-751.
14 徐肇廷. 海洋内波动力学[M].北京:科学出版社,1999.
15 高振中,彭德堂,刘学锋. 塔里木盆地TZ30井中上奥陶统内潮汐沉积[J].江汉石油学院学报,1996,(04):9-14.
16 高振中,何幼斌,张兴阳. 塔中地区中晚奥陶世内波、内潮汐沉积[J].沉积学报,2000,(03):400-407.
17 晋慧娟,李育慈,方国庆. 西秦岭古代地层记录中内波、内潮汐沉积及其成因解释[J].沉积学报,2002,(01):80-84. -
点击查看大图
计量
- 文章访问数: 445
- HTML全文浏览量: 26
- PDF下载量: 467
- 被引次数: 0
下载:
