芒果视频下载

簡介

漁(yu)洞(dong)(dong)(dong)溶洞(dong)(dong)(dong)位于(yu)凱里西面的漁(yu)洞(dong)(dong)(dong)鄉，是一個天然形成的喀斯特溶洞(dong)(dong)(dong)，于(yu)1984年發(fa)(fa)現開(kai)(kai)發(fa)(fa)，目前已經開(kai)(kai)發(fa)(fa)了2000米左右，還有尚未探(tan)明的暗洞(dong)(dong)(dong)6000余米。洞(dong)(dong)(dong)前有小溪，兩岸林木繁茂(mao)，郁(yu)郁(yu)蔥(cong)蔥(cong)，分為(wei)6層5廳8段。洞(dong)(dong)(dong)內大量的石鐘乳、石筍(sun)、石柱、石花，琳瑯(lang)滿(man)目。

CaCO3碳酸鈣有(you)這(zhe)樣一種(zhong)性(xing)質：當它遇到溶有(you)CO2的(de)水(shui)(shui)時(shi)就會(hui)變成(cheng)(cheng)可(ke)溶性(xing)的(de)碳酸氫(qing)(qing)鈣[Ca（HCO3）2] CaCO3+CO2+H2O=Ca（HCO3）2 溶有(you)碳酸氫(qing)(qing)鈣的(de)水(shui)(shui)如(ru)果受熱或遇壓(ya)強突然(ran)(ran)變小(xiao)時(shi)溶在(zai)水(shui)(shui)中(zhong)的(de)碳酸氫(qing)(qing)鈣就會(hui)分解(jie)，重(zhong)新變成(cheng)(cheng)碳酸鈣沉積(ji)下(xia)來。同時(shi)放出二氧化碳。 Ca（HCO3）2 =CaCO3↓+CO2↑+H2O 在(zai)自然(ran)(ran)界(jie)中(zhong)不(bu)斷(duan)發生上(shang)(shang)述(shu)反應于是就形成(cheng)(cheng)了溶洞(dong)(dong)中(zhong)的(de)各種(zhong)景(jing)觀。世界(jie)上(shang)(shang)最大(da)的(de)溶洞(dong)(dong)是北(bei)美(mei)阿巴(ba)拉契亞山(shan)脈(mo)的(de)猛(meng)犸(ma)洞(dong)(dong)，位于肯(ken)塔基州境內，洞(dong)(dong)深64km，所有(you)的(de)岔洞(dong)(dong)連起(qi)來的(de)總長度達250km。洞(dong)(dong)里寬的(de)地(di)(di)方(fang)象(xiang)廣場(chang)，窄的(de)地(di)(di)方(fang)象(xiang)長廊，高的(de)地(di)(di)方(fang)有(you)30m高，整個洞(dong)(dong)平面上(shang)(shang)迂(yu)回曲(qu)折(zhe)，垂向上(shang)(shang)可(ke)分出三(san)層(ceng)。雨季(ji)，整個洞(dong)(dong)內都(dou)有(you)流水(shui)(shui)，成(cheng)(cheng)為地(di)(di)下(xia)河流在(zai)坡(po)折(zhe)處河水(shui)(shui)跌落，形成(cheng)(cheng)瀑布；旱(han)季(ji)，局(ju)部地(di)(di)區有(you)水(shui)(shui)，成(cheng)(cheng)地(di)(di)下(xia)湖泊，可(ke)能還有(you)積(ji)水(shui)(shui)很深的(de)潭(tan)(tan)，不(bu)妨稱無底潭(tan)(tan)。

形成原因

溶(rong)(rong)洞(dong)的(de)(de)(de)形(xing)成(cheng)(cheng)(cheng)是石(shi)(shi)(shi)(shi)(shi)灰(hui)巖(yan)地區地下水(shui)(shui)長期(qi)溶(rong)(rong)蝕的(de)(de)(de)結果，石(shi)(shi)(shi)(shi)(shi)灰(hui)巖(yan)里(li)不溶(rong)(rong)性(xing)的(de)(de)(de)碳(tan)(tan)(tan)(tan)酸(suan)鈣(gai)(gai)受水(shui)(shui)和(he)二(er)氧(yang)(yang)化碳(tan)(tan)(tan)(tan)的(de)(de)(de)作用能轉化為微溶(rong)(rong)性(xing)的(de)(de)(de)碳(tan)(tan)(tan)(tan)酸(suan)氫鈣(gai)(gai)。由(you)(you)于(yu)(yu)石(shi)(shi)(shi)(shi)(shi)灰(hui)巖(yan)層各(ge)部分(fen)含石(shi)(shi)(shi)(shi)(shi)灰(hui)質多少(shao)不同(tong)，被侵蝕的(de)(de)(de)程度(du)不同(tong)，就(jiu)逐漸(jian)被溶(rong)(rong)解分(fen)割(ge)成(cheng)(cheng)(cheng)互(hu)不相(xiang)依、千姿百(bai)態(tai)、陡峭秀(xiu)麗(li)的(de)(de)(de)山峰和(he)奇異景觀(guan)的(de)(de)(de)溶(rong)(rong)洞(dong)。如聞名于(yu)(yu)世的(de)(de)(de)桂林溶(rong)(rong)洞(dong)、北京(jing)石(shi)(shi)(shi)(shi)(shi)花(hua)洞(dong)，就(jiu)是由(you)(you)于(yu)(yu)水(shui)(shui)和(he)二(er)氧(yang)(yang)化碳(tan)(tan)(tan)(tan)的(de)(de)(de)緩(huan)慢侵蝕而(er)(er)創造(zao)出來的(de)(de)(de)杰作。溶(rong)(rong)有碳(tan)(tan)(tan)(tan)酸(suan)氫鈣(gai)(gai)的(de)(de)(de)水(shui)(shui)，當從溶(rong)(rong)洞(dong)頂(ding)(ding)滴到洞(dong)底時，由(you)(you)于(yu)(yu)水(shui)(shui)分(fen)蒸發或壓強減少(shao)，以及溫度(du)的(de)(de)(de)變(bian)化都會(hui)(hui)使二(er)氧(yang)(yang)化碳(tan)(tan)(tan)(tan)溶(rong)(rong)解度(du)減小而(er)(er)析出碳(tan)(tan)(tan)(tan)酸(suan)鈣(gai)(gai)的(de)(de)(de)沉(chen)淀。這些沉(chen)淀經過千百(bai)萬年(nian)的(de)(de)(de)積聚，漸(jian)漸(jian)形(xing)成(cheng)(cheng)(cheng)了鐘乳(ru)石(shi)(shi)(shi)(shi)(shi)、石(shi)(shi)(shi)(shi)(shi)筍等(deng)。如果溶(rong)(rong)有碳(tan)(tan)(tan)(tan)酸(suan)氫鈣(gai)(gai)的(de)(de)(de)水(shui)(shui)從溶(rong)(rong)洞(dong)頂(ding)(ding)上滴落，隨著(zhu)水(shui)(shui)分(fen)和(he)二(er)氧(yang)(yang)化碳(tan)(tan)(tan)(tan)的(de)(de)(de)揮(hui)發，則析出的(de)(de)(de)碳(tan)(tan)(tan)(tan)酸(suan)鈣(gai)(gai)就(jiu)會(hui)(hui)積聚成(cheng)(cheng)(cheng)鐘乳(ru)石(shi)(shi)(shi)(shi)(shi)、石(shi)(shi)(shi)(shi)(shi)幔、石(shi)(shi)(shi)(shi)(shi)花(hua)。洞(dong)頂(ding)(ding)的(de)(de)(de)鐘乳(ru)石(shi)(shi)(shi)(shi)(shi)與(yu)地面的(de)(de)(de)石(shi)(shi)(shi)(shi)(shi)筍連接起來了，就(jiu)會(hui)(hui)形(xing)成(cheng)(cheng)(cheng)奇特的(de)(de)(de)石(shi)(shi)(shi)(shi)(shi)柱。

中國知名溶洞

中國現知最長(chang)的(de)(de)溶洞(dong)(dong)是(shi)(shi)湖北利川縣(xian)騰龍(long)洞(dong)(dong)，長(chang)約40千米(mi)；最深(shen)的(de)(de)為貴州水(shui)城吳家(jia)大洞(dong)(dong)。深(shen)430米(mi)。 　中國是(shi)(shi)個多溶洞(dong)(dong)的(de)(de)國家(jia)，尤以廣(guang)西(xi)境內的(de)(de)溶洞(dong)(dong)著稱(cheng)，如桂林(lin)的(de)(de)七(qi)星巖、蘆迪(di)巖等。北京西(xi)南郊周口(kou)店(dian)附近的(de)(de)上方(fang)山云水(shui)洞(dong)(dong)，深(shen)612m，有七(qi)個“大廳”被一(yi)條窄(zhai)長(chang)的(de)(de)“走廊(lang)”相連，洞(dong)(dong)的(de)(de)盡頭是(shi)(shi)一(yi)個碩大的(de)(de)石筍，美名(ming)十八羅漢(han)，石筍背后(hou)即(ji)是(shi)(shi)深(shen)不可及(ji)的(de)(de)落(luo)水(shui)洞(dong)(dong)，也有一(yi)定規模。周口(kou)店(dian)的(de)(de)龍(long)骨洞(dong)(dong)，洞(dong)(dong)雖不大，卻是(shi)(shi)我們老祖宗的(de)(de)棲(qi)身地。