Research leach traces in limestone of the continental slope of Crimea


  • I. M. Shuraev State Scientific Institution “Department of Marine Geology and Sedimentary Ore Formation» NAS of Ukraine, Kiev
Keywords: leaching, continental slope, limestone, Crimea.

Abstract

The paper is about the leaching process. Processes are common in almost all calcareous rocks of Crimea. They meet in the First ridge of the Crimean Mountains in the Neogene and Paleogene rocks, as well as in the Jurassic limestone of the Main ridge of Crimean mountains. A large number of geological and tourist sites associated with chemical weathering process, named in honor of the Slovenian Karst. Among the typical karst plateau consists of a large number of fascinating caves to a depth of 500 m. As well as smaller form. They are distributed in almost all types of limestones of the Crimean peninsula. However, not all forms of leaching have classic karst origin. Particularly interesting findings with clear signs of leaching on the seabed, raised in several expeditions OMGOR NAS of Ukraine when working on the Crimean continental slope, at the latitude of Cape Foros. About weathering Mesozoic rocks of the seabed of the Black Sea is known very little. Only in the Yu.G. Balandin and V.I. Miller describes the properties of the weathering crust Jurassic shale strata shelf southern coast. On the continental slope Crimea leached rocks were first raised in the 80s geological expeditions Department of Marine Geology and Sedimentary Ore (OMGOR). In the works of Ye.F. Shnyukov, Yu.Yu. Orovetskiy dense limestone with spongy voids leaching dated lower chalk have been described. In subsequent flights OMGOR NAS of Ukraine repeatedly met limestones, mudstones, travertine with different forms of weathering, including emissions of solid mud volcanoes. Forms of weathering in the Crimean Mountains, besides the classic speleogeneticaly genesis, can be formed at the contact of limestone strata of the Upper Jurassic to the lower chalk. These boundaries are observed traces of erosion and karst phenomena. This indicates the presence of a significant erosion between the Jurassic and Cretaceous. The Upper Jurassic limestone rocks spread from the border plateau Karaby-Yayla to Cape Fiolent. Rocks presented thin-layered clean and brecciated limestones. Studies have shown that the geological history of the Crimean Mountains and the deep-sea basin of the Black Sea have the same course of the processes. The test is a limestone facies Shallow Upper Jurassic age, and have been leaching at rewashing on the border of the Jurassic and Cretaceous. The limestone fissures silicification was formed as a result of the activity of living organisms. As a result, silica katagenesis finally formed in the quartz in the Upper Cretaceous. Column was down to great depths, and is a component of the continental slope in the present form. Most likely, fragments of limestone have been omitted hypsometrically lower levels on the occurrence of Cretaceous strata, as a result of neotectonic and landslides.   

Author Biography

I. M. Shuraev, State Scientific Institution “Department of Marine Geology and Sedimentary Ore Formation» NAS of Ukraine, Kiev
State Scientific Institution “Department of Marine Geology and Sedimentary Ore Formation» NAS of Ukraine, Kiev

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Published
2016-12-28
How to Cite
Shuraev, I. (2016). Research leach traces in limestone of the continental slope of Crimea. Journal of Geology, Geography and Geoecology, 24(2), 149-154. https://doi.org/https://doi.org/10.15421/111643