자원환경지질 (Economic and Environmental Geology)
- 제19권spc호
- /
- Pages.131-138
- /
- 1986
- /
- 1225-7281(pISSN)
- /
- 2288-7962(eISSN)
삼기층(三紀層)에 배태(胚胎)된 벤토나이트의 산소(酸素) 및 수소동위원소(水素同位元素) 연구(硏究)
Hydrogen and Oxygen Isotopic Compositions of Tertiary Montmorillonites in Southern Korea
초록
Hydrogen and oxygen isotope ratios of thirteen of the under 2 micron size fraction of the montmorillonites were measured. The oxygen isotopic compositions of these samples range from + 17.0 to +25.1 permil and the hydrogen isotope compositions range from -47.5 to -65.8 permil with an average standard deviation of 0.7 and 2.7 permil, respectively. The oxygen isotope compositions show a positive relationship with stratigraphy whereas the hydrogen isotope compositions do not. It suggest that the montmorillonite attained isotopic equilibrium at the maximum burial depth and ratained their oxygen isotope composition on subsequent uplift. Possibilities of montmorillonite formation by weathering or hydrothermal alteration of volcanic material are eliminated by the
키워드