Results 21 to 30 of about 975,293 (105)

Fine‐scale chemostratigraphy of cross‐sectioned hydrogenous ferromanganese nodules from the western North Pacific

Island Arc, Volume 30, Issue 1, January/December 2021., 2021
Abstract A broad area densely covered by ferromanganese nodules was recently discovered around Minamitorishima (Marcus) Island, representing a high‐potential metal resource, particularly for Co, Ni, Mo, and W. We studied 16 nodule samples from nodule fields around Minamitorishima Island.
Shiki Machida, Kentaro Nakamura, Tetsu Kogiso, Ryo Shimomura, Koichi Horinouchi, Kyoko Okino, Yasuhiro Kato   +6 more
wiley   +1 more source

Re–Os Isotope Constraints on the Depositional Age and Regional Distribution of the Miocene Impact Ejecta Layer Around Minamitorishima Island, Western North Pacific

Journal of Asian Earth Sciences
Tatsuo Nozaki, YASUKAWA Kazutaka, Yasuhiro Kato   +2 more
exaly   +2 more sources

Statistic and Isotopic Characterization of Deep‐Sea Sediments in the Western North Pacific Ocean: Implications for Genesis of the Sediment Extremely Enriched in Rare Earth Elements

Geochemistry, Geophysics, Geosystems, Volume 20, Issue 7, Page 3402-3430, July 2019., 2019
Abstract A certain type of deep‐sea sediment exhibits very high content of rare earth elements and yttrium (REY) and is therefore expected to serve as a novel resource for these industrially essential metals. In this paper, we statistically analyzed the bulk chemical composition of deep‐sea sediments collected from the western North Pacific Ocean.
Kazutaka Yasukawa, Junichiro Ohta, Takashi Miyazaki, Bogdan Stefanov Vaglarov, Qing Chang, Kenta Ueki, Chiaki Toyama, Jun‐Ichi Kimura, Erika Tanaka, Kentaro Nakamura, Koichiro Fujinaga, Koichi Iijima, Hikaru Iwamori, Yasuhiro Kato   +13 more
wiley   +1 more source

Seed Floras in Seabird Nests and the Possibility of Adhesion to Seabird Feathers via Their Nests

Plant Species Biology, Volume 41, Issue 4, July 2026.
Nests are important links between seabirds and plants, and are thought to initiate epizoochory of seabirds. 24 seed species were found in pelagic seabird nests, and 16 species of them had the potential to adhere to seabirds. Our finding indicates an overlooked pathway for the long distance dispersal of plants; epizoochory mediated by nests.
Kanon Mizukoshi, Kazuto Kawakami, Takashi Kamijo   +2 more
wiley   +1 more source

An Experimental Study of Pulp-Lift Characteristics Using a High-Viscous Fluid Simulating Deep Muddy Seawater

Journal of Marine Science and Engineering
Rare-earth mud and manganese nodules coexist on the seafloor around Minamitorishima Island. To investigate the feasibility of a pulp-lift system that can ensure economic efficiency by pumping manganese using rare-earth mud as the working fluid, we ...
Sakai Onishi, Yurie Itagaki, Naoki Nakatani, Kyara Ohara, Hiroyuki Katayama, Tetsuo Yamazaki   +5 more
doaj   +1 more source

Unraveling the Enrichment Mechanisms of Rare Earth Elements in Deep‐Sea Sediments: An Environmental Magnetic Perspective

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Deep‐sea rare earth elements and yttrium (REY)‐rich sediments have attracted considerable attention since their discovery in 2011. However, the environmental factors controlling REY enrichment remain poorly understood, largely because paleoceanographic proxies are absent in pelagic clays.
Xiangfeng He, Jianxing Liu, Dongjie Bi, Yamin Zhang, Mu Huang, Miao Yu, Fengdeng Shi, Jianhua Gao, Xuefa Shi   +8 more
wiley   +1 more source

Deep‐Sea Rare‐Earth Mineral Resources Formed in the Early Eocene Hothouse Ocean: Insights From Deep Learning‐Based Microfossil Observations

Paleoceanography and Paleoclimatology, Volume 40, Issue 4, April 2025.
Abstract Deep‐sea mud enriched in rare‐earth elements (REE), termed REE‐rich mud, is a promising seafloor mineral resource. Data from a decade of surveys have revealed that the mud with the highest REE concentration occurs in the pelagic realm of the western North Pacific Ocean, with at least two layers of elevated REE concentration.
K. Mimura, T. Kitazawa, K. Nakamura, K. Yasukawa, Y. Kuwahara, J. Ohta, Y. Kato   +6 more
wiley   +1 more source

From Internal Variability to Aerosol Effects: Physical Mechanisms Behind Observed Decadal Trends in Surface Solar Radiation in the Western Pacific Ocean

Journal of Geophysical Research: Atmospheres, Volume 129, Issue 18, 28 September 2024.
Abstract The Pacific Ocean, spanning over 30% of the Earth's surface, provides an ideal setting for studying the surface radiative balance due to its relatively pristine atmospheric conditions, far from anthropogenic emission sources. In this study we investigated the causes for the decadal trends of surface solar radiation (SSR) observed at eight ...
L. F. Correa, D. Folini, B. Chtirkova, M. Wild   +3 more
wiley   +1 more source

Observed APO Seasonal Cycle in the Pacific: Estimation of Autumn O2 Oceanic Emissions

Global Biogeochemical Cycles, Volume 38, Issue 9, September 2024.
Abstract In this work, we investigated the seasonal cycle of atmospheric potential oxygen (APO), a unique tracer of air‐sea gas exchanges of molecular oxygen (O2) and carbon dioxide (CO2), expressed as APO = O2 + 1.1 × CO2. APO data were obtained from flask air samples collected since the late 1990s at three Japanese ground stations and on commercial ...
Y. Tohjima, T. Shirai, M. Ishizawa, H. Mukai, T. Machida, M. Sasakawa, Y. Terao, K. Tsuboi, S. Takao, S. Nakaoka   +9 more
wiley   +1 more source

Islands, Island Studies, Island Studies Journal [PDF]

, 2006
Islands are sites of innovative conceptualizations, whether of nature or human enterprise, whether virtual or real. The study of islands on their own terms today enjoys a growing and wide-ranging recognition.
Baldacchino, Godfrey, Godfrey Baldacchino   +1 more
core   +1 more source