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Journal of Zhejiang University SCIENCE A 2005 Vol.6 No.7 P.656-662


Discovery of ferromanganese crust boundary and its genetic and ore prospecting significance

Author(s):  CHU Feng-you, QIAN Xin-yan, ZHANG Hai-sheng, MA Wei-lin, JIN Xiang-long, SUN Guo-sheng

Affiliation(s):  Laboratory of Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China; more

Corresponding email(s):   chuf22@mail.hz.zj.cn

Key Words:  Curst boundary, Crust type, Genetic and ore prospecting significance

CHU Feng-you, QIAN Xin-yan, ZHANG Hai-sheng, MA Wei-lin, JIN Xiang-long, SUN Guo-sheng. Discovery of ferromanganese crust boundary and its genetic and ore prospecting significance[J]. Journal of Zhejiang University Science A, 2005, 6(7): 656-662.

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journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

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%T Discovery of ferromanganese crust boundary and its genetic and ore prospecting significance
%A CHU Feng-you
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%A ZHANG Hai-sheng
%A MA Wei-lin
%A JIN Xiang-long
%A SUN Guo-sheng
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%DOI 10.1631/jzus.2005.A0656

T1 - Discovery of ferromanganese crust boundary and its genetic and ore prospecting significance
A1 - CHU Feng-you
A1 - QIAN Xin-yan
A1 - ZHANG Hai-sheng
A1 - MA Wei-lin
A1 - JIN Xiang-long
A1 - SUN Guo-sheng
J0 - Journal of Zhejiang University Science A
VL - 6
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SP - 656
EP - 662
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Y1 - 2005
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2005.A0656

Evidences for the existence of ferromanganese crust boundary were found for the first time during the survey of the “DA YANG YI HAO” Vessel 2003. Some typical characteristics of the boundary are summarized and the significances of the finding of the boundary are included in the genesis discussion. Ore prospecting and assessment of the crust resources are described in this paper. The morphologic and extending characteristics of the crust boundary led to the recognition of two types of crust boundary: interpenetration crust boundary and closed crust boundary. According to the distribution and types of the crust, however, the boundaries are classified into three types: the boundary between ferromanganese crust and detrital sediment, the boundary between tabular crust and seamount nodules, and the boundary between tabular crust and rudaceous crust. This study revealed that the boundary between tabular crust and nodules was not formed under different regional environments but formed under different nucleation potential barriers between different initial growth (nucleation and germination) processes and between solid rocks and loose sediments. The rudaceous crusts are controlled spatially by fracture zones and the crusts’ boundaries are controlled by the seamount structure and landform. The discovery of the crust boundaries reveals the crust’s ‘negative growth’ phenomena (especially for some seamount nodules). The boundary investigation can be helpful in identifying the existence of tabular crust covered by detrital sediments and in calculating the area covered by the crust. The resource calculation error and the resource quality as well as resource exploration degree can be assessed through the survey of crust boundary.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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