Results 21 to 30 of about 663,567 (291)

Deep ice-core drilling to 800 m at Dome A in East Antarctica

Annals of Glaciology, 2021
A deep ice core was drilled at Dome A, Antarctic Plateau, East Antarctica, which started with the installation of a casing in January 2012 and reached 800.8 m in January 2017. To date, a total of 337 successful ice-core drilling runs have been conducted,
Zhengyi Hu, Guitao Shi, Pavel Talalay, Yuansheng Li, Xiaopeng Fan, Chunlei An, Nan Zhang, Chuanjin Li, Ke Liu, Jinhai Yu, Cheng Yang, Bing Li, Bowen Liu, Tianming Ma   +13 more
doaj   +1 more source

Artificial ice island [PDF]

E3S Web of Conferences, 2023
The development of the regions of the Far North is currently the most important task for the extraction of the mineral resources. However, when conducting offshore drilling in the Arctic seas, the selection of appropriate hydraulic structures is crucial.
Sharapov Dmitry, Andreeva Sofia
doaj   +1 more source

Clean subglacial access: prospects for future deep hot-water drilling [PDF]

, 2015
Accessing and sampling subglacial environments deep beneath the Antarctic Ice Sheet presents several challenges to existing drilling technologies. With over half of the ice sheet believed to be resting on a wet bed, drilling down to this environment must
Smith, Andrew, Tranter, Martyn, Smith, Andrew M, Mowlem, M., Ross, N., Hodgson, Dominic A., Ross, N, Parnell, J, Rose, Mike, Mowlem, Matt, Bentley, Michael J., Siegert, MJ, Parnell, John, Mowlem, Matthew, Pearce, D., Hodgson, D.A., Siegert, M.J., Siegert, Martin J., Bentley, M.J., Tranter, M., Tranter, M, Rose, M, Smith, A.M., Ross, Neil, Smith, Andrew M., Makinson, K, Hodgson, DA, Makinson, Keith, Bentley, Michael, Hodgson, Dominic, Mowlem, M, Rose, M., Pearce, David, Pearce, D, Makinson, K., Siegert, Martin, Smith, AM, Parnell, J., Bentley, MJ   +38 more
core   +1 more source

Crevasses triggered on Pine Island Glacier by drilling through an exceptional melt layer [PDF]

, 2010
The basic theory of crevasse formation suggests that crevasses initiate at or near the surface. However, due to variations in stress with depth, it has been suggested that it is possible for crevasses to initiate at depths of 10–30m.
Julian B. T. Scott, Vaughan, David, Scott, Julian B.T., Robert G. Bingham, Andrew M. Smith, Smith, Andrew, Smith, Andrew M., Bingham, Robert, Vaughan, David G., Scott, Julian, Bingham, Robert G., David G. Vaughan, Julian B.T. Scott   +12 more
core   +1 more source

Leg 199 summary [PDF]

, 2002
Ocean Drilling Program (ODP) Leg 199, "The Paleogene Equatorial Transect" (Sites 1215-1222), was designed to study the evolution of the equatorial Pacific current and wind system as Earth went from maximum Cenozoic warmth to initial Antarctic glaciations.
Lyle, M., Vanden Berg, M.D., Quintin, L., Wilson, P.A., Backman, J., Pälike, H., Coxall, H.K., Janecek, T.R., Raffi, I., Moore, T.C., Nomura, R., Nigrini, C.A., Faul, K., Tripati, A.K., Parés, J.M., Rea, B.R., Kruse, S., Wade, B.S., Nishi, H., Lanci, L., Hovan, S.A., Lear, C.H., Gaillot, P.A., Knoop, P., Busch, W.H., Norris, R.D., Rea, D.K., Steiger, T.H., Parés J. M., Wilson P. A., Busch W. H., Gaillot P., Rea B. R., Kruse S., RAFFI, Isabella, Nomura R., Lyle M. W., Tripati A., Lear C., Nigrini C. A., Moore T. C., Norris R. D., Knoop P., Van Den Berg M. D., Hovan S. A., Janecek T. R., Backman J., Pälike H., Steiger T. H., Coxall H. K., Nishi H., Rea D. K., Faul K., Lanci L., Wade B., Quintin L   +55 more
core   +1 more source

Progress of the RADIX (Rapid Access Drilling and Ice eXtraction) fast-access drilling system [PDF]

The Cryosphere, 2023
RADIX (Rapid Access Drilling and Ice eXtraction) is a prospecting drilling system that has been designed, realized and tested on polar ice sheets. The goal of RADIX is to provide rapid, deep access for sampling of ice and downhole physical measurements ...
J. Schwander, J. Schwander, T. F. Stocker, T. F. Stocker, R. Walther, R. Walther, S. Marending, S. Marending   +7 more
doaj   +1 more source

Anti-icing performance of hydrophobic material used for electromechanical drill applied in ice core drilling [PDF]

Journal of Glaciology, 2020
AbstractUsing an anti-icing coating to prevent ice accretion on the drill surface is a feasible solution to address the drilling difficulties in warm ice. In this study, four types of commercially available hydrophobic coating materials were tested to evaluate their water repellency and anti-icing properties, namely, a mixture of silica and ...
Pinlu Cao, Zhuo Chen, Hongyu Cao, Baoyi Chen, Zhichuan Zheng   +4 more
openaire   +2 more sources

Basal Melt Patterns around the Deep Ice Core Drilling Site in the Dome A Region from Ice-Penetrating Radar Measurements

Remote Sensing, 2023
Basal melt in the Dome A region will influence the deep-ice-core drilling at Kunlun Station. The melting point (wet bedrock) has a higher reflectivity than the surrounding area, which can be assessed using radar echoes from the bedrock. This paper uses a
Hao Wang, Xueyuan Tang, Enzhao Xiao, Kun Luo, Sheng Dong, Bo Sun   +5 more
doaj   +1 more source

Research on the drilling winch control system for clean sampling of Antarctic Subglacial Lakes [PDF]

E3S Web of Conferences, 2021
Antarctica, with a large number of ice sheets, is among the last unexplored places on Earth. The subglacial lakes beneath these ice sheets have been isolated from the outside world for up to 35 million years, containing a diverse group of marine ...
Liu Chunbao, Zhang Sheng
doaj   +1 more source

Modeling of hot-point drilling in ice [PDF]

Annals of Glaciology, 2021
AbstractHot-point drills have been widely used for drilling boreholes in glaciers, ice caps and ice sheets. A hot-point drill melts ice through the thermal head at its bottom end. Penetration occurs through a close-contact melting (CCM) process, in which the ice is melted, and the meltwater is squeezed out by the exerted force applied on the thermal ...
Yazhou Li, Pavel G. Talalay, Xiaopeng Fan, Bing Li, Jialin Hong   +4 more
openaire   +2 more sources