Classification of Deep-sen Sediment by Geotechnical Properties from the KODOS Area in the C-C Zone of the Northeast Equatorial Pacific

지상범,; 형기성,; 김종욱,; 김현섭,; 이근창,; 손승규,

doi:10.4217/opr.2003.25.4.529

Cited by 11 publications

(2 citation statements)

References 13 publications

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“…The most straightforward explanation for these observations is that sediment particles within the pores and cracks of nodules are released to form part of the fines. Abyssal sediments in the KODOS area as well as other nodule exploration areas in the CCZ have average grain size of about 3-30 μm [31][32][33][34][35]. Thus, it is reasonable to expect that sediment particles encapsulated in the nodules are mostly silts and clays as well.…”

Section: Causes Of Compositional Variationmentioning

confidence: 99%

Characterization of Fines Produced by Degradation of Polymetallic Nodules from the Clarion–Clipperton Zone

et al. 2021

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The discharge of fluid–particle mixture tailings can cause serious disturbance to the marine environment in deep-sea mining of polymetallic nodules. Unrecovered nodule fines are one of the key components of the tailings, but little information has been gained on their properties. Here, we report major, trace, and rare earth element compositions of <63 μm particles produced by the experimental degradation of two types of polymetallic nodules from the Clarion–Clipperton Zone. Compared to the bulk nodules, the fines produced are enriched in Al, K, and Fe and depleted in Mn, Co, Ni, As, Mo, and Cd. The deviation from the bulk composition of original nodules is particularly pronounced in the finer fraction of particles. With X-ray diffraction patterns showing a general increase in silicate and aluminosilicates in the fines, the observed trends indicate a significant contribution of sediment particles released from the pores and cracks of nodules. Not only the amount but also the composition of nodule fines is expected to significantly differ depending on the minimum recovery size of particles at the mining vessel.

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Section: Causes Of Compositional Variationmentioning

confidence: 99%

Characterization of Fines Produced by Degradation of Polymetallic Nodules from the Clarion–Clipperton Zone

et al. 2021

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“…. 이러한 이유 는 우리나라의 북쪽과 남쪽광구는 망간단괴의 형태 및 크기와 같은 분포특성, 퇴적물의 구성 성분, 지질공학 적인 특성 등이 다르기 때문이다 (Chi et al, 2003;MOMAF, 2007; 산출된 부존률을 직접 비교하여 보정상수를 산출하였다. (KORDI, 1993(KORDI, , 1994과 점유율 및 단괴 축의 길이를 이용하여 부존률을 보정하는 방 법으로 구분할 수 있다 (Handa and Tsurusaki, 1981;Sharma, 1989aSharma, , 1989bSharma and Kodagari, 1990).…”

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Evaluation of Correction Parameter for the Free-fall Grab Based Mn Nodule Abundance in the Southern Sector of the KODOS

Lee¹,

Ko²,

Kim³

et al. 2011

Economic and Environmental Geology

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Quantitative estimate of manganese nodules based on the operation of a free fall grab (FFG) needs to be corrected because of its less retrieval ability. Previously, the correction parameter of the nodule abundance collected by FFG was calculated based on the image analysis of the photos of bottom sediment in the northern sector of the nodule exploration area of Korea in the NE equatorial Pacific. However, nodules in the southern sector are commonly covered by sediment, which may prevent the use of the correction parameter estimated by photographic techniques. In this study, we attempted dual nodule sampling at the same location by different equipments (i.e. box corer (BC) and FFG) to examine the previous correction parameter of nodule abundance for FFG operation. During the exploration cruises in 2007 to 2009, Mn-nodules were collected from 40 stations both by BC and FFG in the southern sector. The correlation analysis between BC and FFG operations revealed that the BC collected nodules 1.43 times larger than FFG. Our result suggests that the correction parameter of 1.43 can be applied for collection of FFG data to estimate Mn-nodule distribution in the southern sector. The obtained parameter is similar to the previous parameter (1.42~1.45) calculated by the image analysis method, indicating an usefulness of new correction parameter suggested by this study.

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A smart calibration model on track’s pressure-sinkage characteristic of a tracked vehicle moving on soft seabed sediments

Zeng

Zhou

Liu³

et al. 2013

J. Cent. South Univ.

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Classification of Deep-sen Sediment by Geotechnical Properties from the KODOS Area in the C-C Zone of the Northeast Equatorial Pacific

Cited by 11 publications

References 13 publications

Characterization of Fines Produced by Degradation of Polymetallic Nodules from the Clarion–Clipperton Zone

Characterization of Fines Produced by Degradation of Polymetallic Nodules from the Clarion–Clipperton Zone

Evaluation of Correction Parameter for the Free-fall Grab Based Mn Nodule Abundance in the Southern Sector of the KODOS

A smart calibration model on track’s pressure-sinkage characteristic of a tracked vehicle moving on soft seabed sediments

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