Overview of the Controls on Eogenetic Cave and Karst Development in Quintana Roo, Mexico
Overview of the Controls on Eogenetic Cave and Karst Development in Quintana Roo, Mexico
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墨西哥金塔纳罗奥州古成岩洞穴与岩溶发育控制概述
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Coke
中科院分区：
文献类型：
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作者：
P. Kambesis;J. Coke
墨西哥金塔纳罗奥的东北海岸以其巨大的水下洞穴系统、众多的天然井和不寻常的海岸线特征而闻名，这些都是一个始新世岩溶地区沿海水文的表现。地质和水文控制的变化，以及边界条件，导致形成广泛的线性潜水洞穴位于潜水和渗流带，残留侧翼边缘洞穴的渗流带。该地区大量的天然井是进入水下洞穴系统的门户。干燥的天坑提供了进入目前位于包气带的洞穴的通道。岩溶作用和沿岸的过程共同影响了金塔纳罗奥的东北海岸线，形成了沿海和离岸泉水、卡莱塔和新月形海滩等地貌。广泛的内陆补给，成岩不成熟的碳酸盐，区域断层，断裂和线性构造的趋势，混合区动态的交叉点，所有在glacioeustatic-driven淡水/盐水制度的并列导致了密度分层沿海岩溶含水层排水管道的广泛网络。海平面的变化使高海拔的管道网络和侧面边缘的洞穴滞留在渗流带中。指示湍流的导管和由层流形成的侧翼边缘洞穴都是混合带溶解的结果。地表和沿岸的侵蚀促进了金塔纳罗奥内陆和沿海地区的持续岩溶作用。
The northeast coast of the state of Quintana Roo, Mexico is known for its vast underwater cave systems, numerous cenotes, and unusual coast line features that are all expressions of the coastal hydrology of an eogenetic karst region. Variations in geological and hydrological controls, and boundary conditions, have resulted in the formation of extensive linear phreatic caves located in the phreatic and vadose zone, and relict flank margin caves in the vadose zone. A significant number of the region’s cenotes are portals into underwater cave systems. Dry sinkholes provide access to caves currently located in the vadose zone. A combination of karstification and littoral processes have affected the northeast coastline of Quintana Roo resulting in the formation of features such as coastal and off-shore springs, caletas, and crescent-shaped beaches. The juxtaposition of extensive inland recharge, diagenetically immature carbonates, intersection of regional fault, fracture and lineament trends, and mixing zone dynamics, all within glacioeustatic-driven fresh/saline water regime have resulted in a density-stratified coastal karst aquifer drained by an extensive network of conduits. Sea-level change has stranded the higher-elevation conduit networks and the flank margin caves in the vadose zone. The conduits, indicative of turbulent flow, and flank margin caves formed from laminar flow, are both the result mixing-zone dissolution. Surface and littoral erosion facilitate the continued karstification of the inland and coastal areas of Quintana Roo.