芒果视频下载

簡介

漁洞(dong)(dong)溶洞(dong)(dong)位于凱里西面(mian)的(de)漁洞(dong)(dong)鄉(xiang)，是一(yi)個(ge)天然(ran)形成的(de)喀斯特溶洞(dong)(dong)，于1984年發現開發，目(mu)前(qian)已經開發了(le)2000米(mi)(mi)左右(you)，還有尚(shang)未探明(ming)的(de)暗洞(dong)(dong)6000余米(mi)(mi)。洞(dong)(dong)前(qian)有小溪，兩岸林木繁茂，郁(yu)郁(yu)蔥蔥，分為6層5廳(ting)8段。洞(dong)(dong)內大量的(de)石(shi)鐘(zhong)乳、石(shi)筍、石(shi)柱、石(shi)花，琳(lin)瑯滿(man)目(mu)。

CaCO3碳(tan)(tan)(tan)酸鈣(gai)(gai)有(you)(you)這樣一種(zhong)性(xing)質：當它遇(yu)到溶有(you)(you)CO2的(de)(de)(de)水時(shi)就會(hui)變(bian)(bian)成(cheng)(cheng)可(ke)溶性(xing)的(de)(de)(de)碳(tan)(tan)(tan)酸氫(qing)鈣(gai)(gai)[Ca（HCO3）2] CaCO3+CO2+H2O=Ca（HCO3）2 溶有(you)(you)碳(tan)(tan)(tan)酸氫(qing)鈣(gai)(gai)的(de)(de)(de)水如(ru)果受熱或遇(yu)壓(ya)強突然變(bian)(bian)小時(shi)溶在(zai)(zai)(zai)水中(zhong)的(de)(de)(de)碳(tan)(tan)(tan)酸氫(qing)鈣(gai)(gai)就會(hui)分解，重新變(bian)(bian)成(cheng)(cheng)碳(tan)(tan)(tan)酸鈣(gai)(gai)沉積(ji)(ji)下(xia)(xia)來。同時(shi)放出二氧化碳(tan)(tan)(tan)。 Ca（HCO3）2 =CaCO3↓+CO2↑+H2O 在(zai)(zai)(zai)自然界(jie)中(zhong)不(bu)斷發生上(shang)述反(fan)應于(yu)是就形成(cheng)(cheng)了溶洞(dong)(dong)中(zhong)的(de)(de)(de)各種(zhong)景觀。世界(jie)上(shang)最大的(de)(de)(de)溶洞(dong)(dong)是北美阿巴(ba)拉契(qi)亞山脈的(de)(de)(de)猛犸洞(dong)(dong)，位于(yu)肯塔(ta)基州(zhou)境(jing)內，洞(dong)(dong)深64km，所有(you)(you)的(de)(de)(de)岔洞(dong)(dong)連起來的(de)(de)(de)總長(chang)度達(da)250km。洞(dong)(dong)里寬的(de)(de)(de)地方(fang)象廣(guang)場(chang)，窄的(de)(de)(de)地方(fang)象長(chang)廊(lang)，高的(de)(de)(de)地方(fang)有(you)(you)30m高，整(zheng)個洞(dong)(dong)平面上(shang)迂回曲折，垂(chui)向上(shang)可(ke)分出三(san)層。雨季，整(zheng)個洞(dong)(dong)內都有(you)(you)流(liu)水，成(cheng)(cheng)為地下(xia)(xia)河流(liu)在(zai)(zai)(zai)坡折處河水跌落，形成(cheng)(cheng)瀑布；旱季，局部地區(qu)有(you)(you)水，成(cheng)(cheng)地下(xia)(xia)湖泊，可(ke)能還有(you)(you)積(ji)(ji)水很深的(de)(de)(de)潭(tan)(tan)，不(bu)妨稱無底潭(tan)(tan)。

形成原因

溶(rong)(rong)(rong)洞(dong)(dong)的(de)(de)形成是石(shi)(shi)(shi)灰(hui)巖地(di)區地(di)下水(shui)(shui)長(chang)期溶(rong)(rong)(rong)蝕(shi)(shi)的(de)(de)結(jie)果，石(shi)(shi)(shi)灰(hui)巖里不(bu)(bu)溶(rong)(rong)(rong)性的(de)(de)碳(tan)(tan)(tan)酸(suan)鈣(gai)受水(shui)(shui)和(he)二(er)氧(yang)(yang)化碳(tan)(tan)(tan)的(de)(de)作用能轉化為微溶(rong)(rong)(rong)性的(de)(de)碳(tan)(tan)(tan)酸(suan)氫(qing)鈣(gai)。由于石(shi)(shi)(shi)灰(hui)巖層各部分(fen)含石(shi)(shi)(shi)灰(hui)質多少不(bu)(bu)同，被(bei)侵蝕(shi)(shi)的(de)(de)程度不(bu)(bu)同，就(jiu)逐漸(jian)被(bei)溶(rong)(rong)(rong)解分(fen)割成互不(bu)(bu)相依、千(qian)姿(zi)百(bai)態、陡峭秀麗的(de)(de)山峰和(he)奇(qi)異(yi)景(jing)觀的(de)(de)溶(rong)(rong)(rong)洞(dong)(dong)。如聞名于世的(de)(de)桂林溶(rong)(rong)(rong)洞(dong)(dong)、北京石(shi)(shi)(shi)花洞(dong)(dong)，就(jiu)是由于水(shui)(shui)和(he)二(er)氧(yang)(yang)化碳(tan)(tan)(tan)的(de)(de)緩慢侵蝕(shi)(shi)而創造出(chu)來的(de)(de)杰作。溶(rong)(rong)(rong)有碳(tan)(tan)(tan)酸(suan)氫(qing)鈣(gai)的(de)(de)水(shui)(shui)，當從溶(rong)(rong)(rong)洞(dong)(dong)頂滴到洞(dong)(dong)底時(shi)，由于水(shui)(shui)分(fen)蒸發或壓強(qiang)減少，以及溫度的(de)(de)變化都會(hui)使二(er)氧(yang)(yang)化碳(tan)(tan)(tan)溶(rong)(rong)(rong)解度減小而析(xi)出(chu)碳(tan)(tan)(tan)酸(suan)鈣(gai)的(de)(de)沉(chen)淀。這些沉(chen)淀經過(guo)千(qian)百(bai)萬年的(de)(de)積聚，漸(jian)漸(jian)形成了(le)鐘乳石(shi)(shi)(shi)、石(shi)(shi)(shi)筍(sun)等(deng)。如果溶(rong)(rong)(rong)有碳(tan)(tan)(tan)酸(suan)氫(qing)鈣(gai)的(de)(de)水(shui)(shui)從溶(rong)(rong)(rong)洞(dong)(dong)頂上滴落，隨著(zhu)水(shui)(shui)分(fen)和(he)二(er)氧(yang)(yang)化碳(tan)(tan)(tan)的(de)(de)揮發，則析(xi)出(chu)的(de)(de)碳(tan)(tan)(tan)酸(suan)鈣(gai)就(jiu)會(hui)積聚成鐘乳石(shi)(shi)(shi)、石(shi)(shi)(shi)幔、石(shi)(shi)(shi)花。洞(dong)(dong)頂的(de)(de)鐘乳石(shi)(shi)(shi)與地(di)面的(de)(de)石(shi)(shi)(shi)筍(sun)連接起來了(le)，就(jiu)會(hui)形成奇(qi)特的(de)(de)石(shi)(shi)(shi)柱。

中國知名溶洞

中國(guo)(guo)現知最長(chang)的(de)(de)(de)(de)溶(rong)洞(dong)(dong)(dong)(dong)是(shi)(shi)(shi)湖北利川縣騰龍(long)洞(dong)(dong)(dong)(dong)，長(chang)約(yue)40千米(mi)；最深(shen)(shen)的(de)(de)(de)(de)為(wei)貴州水城吳家(jia)大(da)洞(dong)(dong)(dong)(dong)。深(shen)(shen)430米(mi)。 　中國(guo)(guo)是(shi)(shi)(shi)個(ge)多(duo)溶(rong)洞(dong)(dong)(dong)(dong)的(de)(de)(de)(de)國(guo)(guo)家(jia)，尤以廣西(xi)境內的(de)(de)(de)(de)溶(rong)洞(dong)(dong)(dong)(dong)著(zhu)稱，如桂林的(de)(de)(de)(de)七星巖(yan)、蘆迪巖(yan)等。北京西(xi)南郊周口店(dian)附近的(de)(de)(de)(de)上方山(shan)云(yun)水洞(dong)(dong)(dong)(dong)，深(shen)(shen)612m，有七個(ge)“大(da)廳(ting)”被一條窄長(chang)的(de)(de)(de)(de)“走廊”相連，洞(dong)(dong)(dong)(dong)的(de)(de)(de)(de)盡(jin)頭是(shi)(shi)(shi)一個(ge)碩大(da)的(de)(de)(de)(de)石(shi)筍，美名(ming)十八羅(luo)漢，石(shi)筍背后即是(shi)(shi)(shi)深(shen)(shen)不(bu)可及的(de)(de)(de)(de)落(luo)水洞(dong)(dong)(dong)(dong)，也有一定(ding)規(gui)模。周口店(dian)的(de)(de)(de)(de)龍(long)骨洞(dong)(dong)(dong)(dong)，洞(dong)(dong)(dong)(dong)雖(sui)不(bu)大(da)，卻是(shi)(shi)(shi)我們老祖宗的(de)(de)(de)(de)棲身地。