Results 31 to 40 of about 220 (93)

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

Changing Abundance of Magnetofossil Morphologies in Pelagic Red Clay Around Minamitorishima, Western North Pacific [PDF]

, 2017
金沢大学理工研究域地球社会基盤学系Recent investigations have discovered an unexpected abundance of magnetofossils in oxic pelagic red clays. These have potential to serve as paleoenvironmental tracers in otherwise nonfossiliferous sediments. Here, we report on variations
Saitoh Masafumi, Usui Yoichi, Yamazaki Toshitsugu, 臼井 洋一   +3 more
core   +2 more sources

CAELUS: Classification of sky conditions from 1-min time series of global solar irradiance using variability indices and dynamic thresholds [PDF]

, 2023
Precise sky classification as a function of cloudiness is desirable or necessary in a variety of applications. CAELUS, a novel classification algorithm that relies on various thresholds to separate all possible sky conditions into six classes, is ...
Gueymard, Christian A., Ruiz-Arias, José Antonio   +1 more
core   +1 more source

Unmixing biogenic and terrigenous magnetic mineral components in red clay of the Pacific Ocean using principal component analyses of first-order reversal curve diagrams and paleoenvironmental implications [PDF]

, 2020
金沢大学理工研究域地球社会基盤学系Red clay widely occupies the seafloor of pelagic environments in middle latitudes, and potentially preserves long paleoceanographic records.
Fu Weixin, Shimono Takaya, Usui Yoichi, Yamazaki Toshitsugu, 臼井 洋一   +4 more
core   +2 more sources

Influence of regional-scale anthropogenic emissions on CO2 distributions over the western North Pacific [PDF]

, 2003
We report here airborne measurements of atmospheric CO2 over the western North Pacific during the March-April 2001 Transport and Chemical Evolution over the Pacific (TRACE-P) mission.
Anderson, BE, Avery, MA, Blake, DR, Kiley, CM, Nolf, SR, Sachse, GW, Streets, DG, Thornhill, KL, Tsutsumi, Y, Vay, SA, Westberg, DJ, Woo, JH   +11 more
core   +2 more sources

Global distribution and trends of tropospheric ozone: An observation-based review [PDF]

, 2014
Tropospheric ozone plays a major role in Earth’s atmospheric chemistry processes and also acts as an air pollutant and greenhouse gas. Due to its short lifetime, and dependence on sunlight and precursor emissions from natural and anthropogenic sources ...
BALASHOV N. V., COOPER O.R., CUPEIRO M., GALBALLY I. E., GILGE S., HOROWITZ L., JENSEN Niels, LAMARQUE J. F., NAIK Vaishali, OLTMANS S. J., PARRISH D.D., SCHWAB J., SHINDELL D. T., THOMPSON Anne M., THOURET V., WANG Y., ZBINDEN R. M., ZIEMKE J.   +17 more
core   +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

The Global Positioning System observations on the 2011 Tohoku M9 earthquake genesis process with Physical Wavelets

, 2021
Tohoku is at the eastern edge of a continental tectonic plate overriding a subducting oceanic plate. The GPS observations on the 2011 Tohoku M9 earthquake are the daily displacements at the stations in Tohoku and the Northwest Pacific Ocean.
Takeda, Fumihide
core  

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

Geologi dan Kemostratigrafi Unsur pada Batuan Sedimen Laut dalam Formasi Totogan, Kecamatan Sadang, Jawa Tengah [PDF]

, 2022
Dijumpainya pengkayaan unsur Logam Tanah Jarang (LTJ) & Ytrrium (Y) yang melimpah pada endapan lempung sedimen laut dalam di daerah Pulau Minamitorishima, Jepang melatar belakangi penelitian ini dengan menerapkan hipotesis yang sama kepada endapan ...
RAMADHAN, Anjar Kurnia
core