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SiO2-CaO-MnO Correlations and Distributions of KODOS Manganese Nodules
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  • Journal title : Ocean and Polar Research
  • Volume 26, Issue 2,  2004, pp.199-205
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2004.26.2.199
 Title & Authors
SiO2-CaO-MnO Correlations and Distributions of KODOS Manganese Nodules
Chang, Se-Won; Choi, Hun-Soo; Kang, Jung-Seok; Kong, Gee-Soo; Lee, Sung-Rock; Chang, Jeong-Hae;
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and CaO are added to decrease the smelting temperature in the reduction-smelting method for manganese nodule processing. These elements are components of the manganese nodules and might be very important controlling factors in the processing due to the locally variable content. The 707 chemical data of manganese nodules acquired from 1994 to 2001 in KODOS(Korea Deep Ocean Survey) area were used for the hierarchical cluster analysis. The chemical data were classified by the morphological types, and the averages of the chemical data for each station were classified by the facies groups and the localities. All data are plotted on the phase diagram at to compare with the best compositional area in the nodule smelting. Variations and distributions of and CaO in KODOS nodules were also reviewed. The mineral phases assigned by the cluster analysis are CFA(Carbonate Fluorapatite), Fe-oxide, Al-silicate, and Mn-oxide. MnO contents are generally higher than contents in most of the morphological types except for the Is- and It-type. The Dt- and Tt-type show wider range and the E-types show high anomaly in their CaO contents. The stations which belong to facies group A and B show generally higher MnO contents than contents, however, the stations of facies group C and D show wide range in their MnO and contents. It seems to be very important to control the contents in the processing because of the wide range in the northern area. The additions of approximately 10 wt.% CaO and 10 wt.% are recommended for the northern area, whereas, the additions of approximately 10 wt.% CaO and 20 wt.% are recommended for the southern area.
KODOS;manganese nodules;reduction-smelting method; phase diagram;controlling factors;morphological types;facies groups;
 Cited by
망간단괴의 분화율과 망간단괴 분말 및 해저퇴적물의 물리적 특성,최헌수;강중석;장세원;고상모;엄인권;

한국광물학회지, 2007. vol.20. 4, pp.277-287
KODOS 남쪽광구에서 자유낙하식 채취기로 채취된 망간단괴 부존률 평가를 위한 보정상수 검증,이현복;고영탁;김종욱;지상범;김원년;

자원환경지질, 2011. vol.44. 6, pp.475-483 crossref(new window)
Evaluation of Correction Parameter for the Free-fall Grab Based Mn Nodule Abundance in the Southern Sector of the KODOS, Economic and Environmental Geology, 2011, 44, 6, 475  crossref(new windwow)
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