巴西米纳斯吉拉斯州阿科斯-平原岩溶地区的地貌单元

IF 1 4区地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Acta Carsologica Pub Date : 2023-12-13 DOI:10.3986/ac.v52i2-3.10129

Mariana Barbosa Timo, Luiz Eduardo Panisset Travassos

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引用次数: 0

摘要

阿科斯-平原喀斯特地区面积约 850 平方公里，由巨大的碳酸盐岩形成，拥有数百个洞穴、岩洞和竖井。该地区发现了许多化石，还可以找到岩画和其他考古遗迹。岩溶地貌的特点是废墟状地貌、风化洞穴、连续或孤立的露头。这些岩溶地貌被裂隙、断裂和裂缝所切割，并被平缓的地形所分隔，这些地形包括溶洞、uvalas、洼地和盲谷。该地区岩溶形态的演变反映了水文和古气候的变化，新构造事件产生的断层和裂缝对水流起着控制作用。在该地区可以观察到四个地貌分区，每个分区都有各自的特点。该地区是巴西热带岩溶的杰出代表，也是巴西最重要的石灰石和白云石矿床之一。因此，划分其地貌单元有助于了解岩洞遗产，并为可持续利用的战略决策提供指导。

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Geomorphological units in Arcos-pains karst region, Minas gerais, Brazil

The Arcos-Pains Karst Region is approximately 850 km2, formed by massive carbonate rocks that host hundreds of caves, rock shelters and shafts. Many fossil discoveries exist in the region; one can also find rock paintings and other archaeological remains. A ruiniform landscape, weathered caves and continuous or isolated outcrops characterize the karst. They are cut by diaclasis, fractures and fissures, separated by flattened relief with dolines, uvalas, ponors and blind valleys. The evolution of karst morphology in the region reflects pluviometric and paleoclimatic variations, with faults and fractures from neotectonics events exerting control over water flows. One can observe four geomorphological compartments in this region, each with specific characteristics. The region is an outstanding example of the Brazilian intertropical karst and one of the most important Brazilian mineral deposits of limestone and dolomite. So, delimitating its geomorphological units can facilitate understanding the speleological heritage and guide strategic decisions for sustainable use.

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来源期刊

Acta Carsologica 地学-地球科学综合

CiteScore

1.50

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： Karst areas occupy 10-20 % of ice-free land. Dissolution of rock by natural waters has given rise to specific landscape and underground. Karst surface features and caves have attracted man''s curiosity since the dawn of humanity and have been a focus to scientific studies since more than half of millennia. Acta Carsologica publishes original research papers and reviews, letters, essays and reports covering topics related to specific of karst areas. These comprise, but are not limited to karst geology, hydrology, and geomorphology, speleology, hydrogeology, biospeleology and history of karst science.