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洞穴碳酸钙沉积过程中的水形状因素(英文)
引用本文:熊康宁,陈进.洞穴碳酸钙沉积过程中的水形状因素(英文)[J].贵州师范大学学报(自然科学版),1998,16(3):54-58.
作者姓名:熊康宁  陈进
作者单位:[1]贵州师范大学资源与环境科学系 [2]贵州地质工程勘察院
摘    要:洞穴碳酸钙的成因一直是很多学者研究的对象,特别是对于制约洞穴碳酸钙沉积的因素,研究的文章较多,比如象温度的因素。Pco2因素,水运动因素,界面因素,生物因素等等,作者多年来从事洞穴碳酸钙实验的研究,从水的界面因素及CO2逸出的机制出发提出了水体形状因素的观点,提出水体在不同的形状下,可以导致其沉积速度的不同,而且这种影响可以达到不可忽略的程度,同一体积的水体,由于它所处的不同形状的改变,将导致其沉积速度的很大差异,换言之,处于沉积中的CaCO3水,可以因为其水体形状的改变而产生加速的沉积作用。因此在讨论CaCO3沉积速度的时候,不能忽略其所处的水体形状条件。通过室内不同形状水体(同体积)的对比实验,以及同体积改变形状的实验,提出了水体形状的改变应是影响CaCO3沉积速度的重要因素。由于CO2在水中向空气逸出过程中,要经历一定的路程,当水体形状改变以后,C2Z的逸出路径大大地改变,这是造成沉积速度改变的主要原因。文章也提出,当水体形状被分裂成水沫形状时和水体被充满气泡时,这些形状的改变对CaCO3沉积速度改变最大。洞穴地下河以一种大体积小的水——气界面的状态存在,当以泉等形式递出地表时,它的水体形状改变往往是大水——气界面,小的水深,这种形状

关 键 词:水体形状  沉积速度  薄水比  CaCO_3沉积

WATER SHAPES IN PROCESSES OF SPELEOTHEM DEPOSITION
Xiong Kangning, Cheng Xing.WATER SHAPES IN PROCESSES OF SPELEOTHEM DEPOSITION[J].Journal of Guizhou Normal University(Natural Sciences),1998,16(3):54-58.
Authors:Xiong Kangning  Cheng Xing
Abstract:The contrast test studies of different shapes of water fory and changed shapes of wa-ter body with same volume indicate that the later is an important factor to influence CaCO3 deposit veloc-ity. When CO2 goes out from air - water interface CO2 will go through a distance when escaping from air- water interface. The water shape change will result in a change of the distance and the area of air -water interface, and hence the change of deposition velocity. The change of water shapes into spray filledwith bubbles will grcatly alter the velocity. D value called as thin - water ratio is presented to show thechange of air - water interface and the distance of CO2 escapment when water shape changes. Under-ground river exists in a state of large depth but small air - water interface. When discharging to the sur-face as a spring, the water shape and C value equal to area/depth will changes with a state of great inter-face but shallow depth, i. e. great D value. This will result in the tufa's deposition. The paper is con-cluded with many continental CaCo3 dePOSits formed by processes.
Keywords:Water shape  Deposition velocity  CaCO_3 deposit
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