경남 고성의 화강암 적색 풍화층의 특색과 성인에 관한 논의
Discussion of the Origin and the Properties of Granitic Red Regolith Profile in Goseong, Southern Korea
0
조회
0
다운로드
8
인용
0
참고문헌
키워드
초록
남해안의 고성에 위치하는 월치고개 단면은 10m 두께의 화강암 풍화층으로써, 10YR 4/4에 가까운 적색을 띠고 있어서 고온다습했던 고기후의 산물로 판단되기 쉬운 단면이다. 그러나 단면관찰과 박편분석, XRD 동정과 지화학적 분석을 통해 살펴본 결과, 열수변성의 대표광물인 할로이사이트가 단면 전체에서 보편적으로 나타나고 있으며, 한반도의 일반적 화강암 풍화층의 화학적 풍화율인 60~70%보다 훨씬 높은 97%에 달하였다. 이는 기후지형학적 풍화에 의해 형성된 적색풍화층이 아니라, 지열수에 의한 열수변성 가능성이 매우 높게 단면으로 판단된다.
Abstract
Granitic regolith profile in Goseong, southern Korea, reveals various types of corestones from unweathered round fresh rocks to decomposed rock cores with unweathered spheroidal rock-layers on outer surface, deep weathering profile with 10m in depth, and red saprolite usually cited as related to high temperature climatic environment. In respect of this optical features such as the depth and the color of the profile, Goseong granitic profile may be regarded as products of paleoclimate with more high temperature and humidity than the present. But it is revealed that halloysite is a predominant clay mineral in upper part as well as lower part by XRD analysis. Halloysite is dominant mineral in hydrothermal alteration milieu. The leaching rate of chemical components is up to 97%, very high compared to common granite profiles with 60~70% in Korean peninsula. So, it is assumed that granitic red regolith in Goseong is a product of hydrothermal alteration, not meteoric weathering.
참고문헌 (24)
- 김영래, "한반도 중남부 화강암과 편마암의 풍화 특성", 박사, pp.2005
- 서희영, "고성분지 일대의 지형 특성", 석사, pp.2010
- 양재혁, "한반도 남해안의 해안지형 특색 및 발달 과정", 박사, pp.2007
- Alderton, D. H. M, "The character and evolution of hydrothermal fluids associated with the kaolinised St Austell granite, SW England", J. Geol. Soc., London, 140, pp.297~309 (1983)
- Bremer, H., "Flüsse, Flächen- und Stufenbildung in den feuchten Tropen", Würyburger Geographische Arbeiten, 35, pp.1~ (1971)
- Bristow, C. R, "Kaolin deposits of the United Kingdom of Great Britain and Northern Ireland", Twenty-Third International Geological Congress, Prague, 통권 : 15, pp.275~288 (1969)
- Bristow, C. R, "Historical and geological aspects of the China Clay industry of South-West England, Transactions of the Royal Geological Society of Cornwall", Migo ´n, 2006, Granite Landscapes of the World, 통권 : 21, pp.247~314 (1994)
- Coque-Delhuille, B., "Les formations superficielles des plateaux de al Margeride occidentale; étude géomorphologique", 박사, pp.1978
- Dearman, W. R., "Engineering grading of weathered granite", Engin. Geol, 12, pp.345~374 (1978)
- Dixon, J. C, "Character and origin of deep arenaceous weathering mantles on the Bega batholith, southeastern Australia", Catena, 8, pp.87~109 (1981)
- Eggler, D. H, "Granite, grusses and the Sherman Erosion Surface, southern Laramie Range, Colorado-Wyoming", Ame. J. Sci, 267, pp.510~522 (1969)
- Evans, C. V, "Genesis of altered Conway granite (grus) in New Hampshire, USA", Geoderma, 58, pp.201~218 (1993)
- McNabb, A, "Water-rock interaction during reinjection of geothermal waste water", Proc. NZ Geothermal Worksh., Univ. of Auckland, pp.68~71 (1979)
- Migo´ n, P., "Granite Landscapes of the World, Oxford", ~ (2006)
- Millot, G., "Geology of Clays" (1970), Chapman & Hall
- Nesbitt, H. W, "Formation and diagenesis of weathering profiles", J. Geol, 97, pp.129~147 (1989)
- Ollier, C. D, "Tropical geomorphology and longterm landform evolution", Finisterra, 36, pp.203~221 (1983)
- Ruxton, B. P, "Weathering of granite and associated erosional features in Hong Kong", Geol. Soc. Ame., Bull, 68, pp.1263~1282 (1957)
- Shaw, R, "Variations in sub-tropical deep weathering profiles over the Kowloon Granite, Hong Kong", J. Geol. Soc., London, 154, pp.1077~1085 (1997)
- Sheppard, S. M. F., "The Cornubian batholith SW England: D", H and 18O, J. Geol. Soc., London, pp.1977, 133[DOI]
- Sueoka, T., "Identification and classification of granitic residual soils using chemical weathering index", Geomechanics in Tropical Soils, Proceedings of the 2nd Internat’l conference on Geomechanics in Tropical soils, Singapore, pp.55~61 (1988)
- Thomas, M. F., "Geomorphology in the Tropics" (1994), John Wiley & Sons
- Twidale, C. R., "Granite Landforms" (1982), Elsevier
- Velde, B., "Formation of clay minerals in hydrothermal environments, Origin and Mineralogy of Clays" (1995), Springer-Verlag