... ABSTRACT Deep-sea mining of polymetallic nodules is expected to cause directly and indirectly disturbance of the abyssal benthic ecosystem. Acquisition of baselines data of each mining area is essential for evaluation of the environmental impacts as well as for development of site-specific...

... and coring during 2001 and 2002 (only coring) were used out to evaluate the immediate effects of benthic disturbance and subsequent restoration of benthic environment. Results from sedimentological, geotechnical, geochemical, biochemical, microbiological and benthos analyses indicate a complex process...

... disturbance experiment (IOM BIE; see below). The current vectors (Kotlinski et al., 1996; Tkatchenko and Stoyanova, 1998) showed the current pattern to have conformed, over the period of deployment, to the calm regime of Demidova et al. (1996). However, seafloor photographs taken 22 months later (April- May...

...-Clipperton Fracture Zone (CCFZ) at the depth of about 4300 m, genus-level diversity of meiobenthic nematodes and harpacticoid copepods, the meiofauna dominants, was examined immediately before and immediately after (July 1995), as well as 22 months after (May 1997) the experimental disturbance performed...

... SUMMARY: Several groups of mining engineers and environmental scientists have been conducting studies for the assessment of environmental impact and additional disturbance on the deep seabed. These studies influence the development of an individual mining system and its subsystems...

... basin subsystem mining system indian ocean basin upstream oil & gas operation rov instrumentation module polymetallic nodule subsea system disturbance Proceedings ofThe Fourth (2001) Ocean Mining Symposium Szczecin, Poland, September 23-27, 2001 Copyright © 2001 by The International...

... Marine Biological lab., Kyoto Univ., Wakayama, .TalEl T. A1atsu DeepOcemlReso~ Development Co., LID. Toho, JalEl ABSTRACT In 1999, ~m el.llerimental study was initiated in the w~iem Pacific to evaluate the direct impacts of a mining machine on benthic organisms. An artificial disturbance was cmIted, ~md...

... of experimental sediment disturbance mimicking that produced by a nodule miner, was sampled immediately before and immediately after the disturbance. The results of that sampling yielded evidence of purported seasonal effects on the sea floor, produced by sedimentation of phytodetritus. The original 10M Benthic...

..., biological, and chemical factors. This was followed by a disturbance to assess the impact from deep sea mining. symposium social impact assessment metals & mining mining symposium environmental impact assessment social responsibility disturbance sustainability ecosystem deep-sea mining...

... ABSTRACT: Watermass properties were obtained in the Indian Deep Sea Experiment (INDEX) area during pre- (27 May -: 8 July 1997) and post- (22 July - 5 September, 1997) benthic disturbance periods respectively. Watermass (Temperature-Salinity: T-S) structure was characterised with the presence...

... of impact of simulated disturbance in the benthic environment shows vertical mixing of sediment, lateral distribution of particles, changes in geochemical and biochemical conditions as well as reduction in biomass in the benthic environment. The results obtained are useful in determining the indicator...

... ecosystem. The abundance of meiofauna was monitored before, just after, and one and two years after the JET experiment in areas without deposits, and in those with light, moderate, and heavy deposits. In the post-disturbance survey two years after the experiment, the macro- and megabenthos were also studied...

... sediment detailed exploration environmental research bie disturbance international seabed authority nodule radziejewska exploration experiment near-bottom water pore water chemical composition Proceedings ofthe Third (1999) Ocean Mining Symposium Goa, India, November 8-10, 1999 Copyright ©...

... meaning Deep-sea environmental protection) focussed on the benthic ecosystem. The location of the investigations was an area in the German mining claim in the eastern equatorial Pacific where a mining-like disturbance was set. Within this framework modelling efforts were made on meso- and macroscale...

... Abstract: The probable impact of nodule mining on benthic biota was studied by creating a benthic disturbance. During the predisturbance study in the Central Indian Basin, box core samples were analyzed for the distribution, composition and abundance of meiobenthos and macrobenthos...

... Abstract: A 3-D hydrodynamic model for sediment transport has been developed to assess the environmental impact of benthic disturbance during the deep-sea mining activity. The model was applied to the Japan Deep-Sea Impact Experiment (JET) and a series of numerical simulations were carried out...

... in CIB, the benthic disturbance experiment was carried out by operating the sediment resuspension equipment (disturber) in the indian Pioneer Area. Results of extensive studies conducted before and after the disturber experiment suggest that noticeable changes occur in the sediment texture, clay...

... to be relatively invariant. Analyses of variance (ANOVA) between grab and core samples .showed that one could substitute the other for sampling only up to 10cm depth. Variability observed between samples for the two years could be due to temporal factors.· PairedT- test between pre- and post-disturbance samples...

...Proceedings ofthe Third (1999) Ocean Mining Symposium Goa, India, NovemberS-l0, 1999 . Copyright © 1999 by The Interntltional Society ofOffthore and Polar Engmeers ISBN 1-880653-45-1 Effect of Benthic Disturbance on Geotechnical Characteristics of Sediments from Nodule Mining Area in the Central...

... rov platform operation subsystem identification instrumentation polymetallic nodule programme programme disturbance mining system nodule mining technology collector module upstream oil & gas module participation Proceedings ofthe Third (1999) Ocean Mining Symposium Goa, India...