Magnetic properties of siliceous marine sediments in Northern Hokkaido,Japan: a quantitative tectono‐sedimentological study of basins along an active margin     

Y. Itoh  S. Kusumoto  T. Inoue 《Basin Research》2013,25(6):738-750

The formation processes of the late Neogene sedimentary basins in Northern Hokkaido have been investigated on the basis of rock magnetism, structural geology and numerical modelling. Untilted site‐mean directions of remanent magnetization of the Wakkanai Formation, obtained from oriented core samples in Horonobe, suggest remarkable counterclockwise block rotation (ca. 70°) since the late Neogene. Uniform microscopic fabric of the siliceous sediments was inferred from the alignment of the principal axes of the anisotropy of magnetic susceptibility (AMS). After correction for tectonic rotation, the maximum axis of AMS, which reflects the sedimentary fabric of the dominant paramagnetic minerals, is in an E‐W direction, which is concordant with the influx direction of diatomaceous particles into the N‐S elongate sedimentary basins. The difference in the bulk initial magnetic susceptibility of the siliceous sediments of the Wakkanai Formation between the depocenter of the basin and its peripheral part implies that terrigenous non‐magnetic fraction has been sorted out during transportation of the detrital grains as gravity flows. As for the development mechanism of the N‐S elongate late Neogene basins in Northern Hokkaido, their depocenter arrangement and subsidence pattern indicates dextral motions upon a longitudinal fault zone along the Eurasian convergent margin. Dislocation modelling was adopted to explain vertical displacement and rotational motion around the study area and successfully restored the deformation pattern based on the assumption of dextral slip at a left‐stepping part of a strand of the transcurrent fault.  相似文献   

Three lecideoid lichens new to Svalbard, Norway     

T. Inoue  S. Kudoh  M. Inoue  M. Uchida  H. Kanda 《Polar Science》2011,4(4):588-592

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Effects of the Chemical Compositions of Salars de Uyuni and Atacama Brines on Lithium Concentration during Evaporation   总被引：2，自引：0，他引：2  

Yasumasa Ogawa  Hiroshi Koibuchi  Koichi Suto  Chihiro Inoue 《Resource Geology》2014,64(2):91-101

During Li recovery from salar brines, Li concentration is typically increased to about 60,000 mg L^?1 by evaporation. We investigated the concentration changes of Li, Na, K, Mg, Cl, SO₄, and B during evaporation of both natural Uyuni and artificial Atacama brines. The Uyuni brine exhibited a maximum Li concentration of 6810 mg L^?1 at 31 days of evaporation, at which point the majority of the Na and K in the brine was removed. The Li concentration decreased with further evaporation due to precipitation as Li₂SO₄, such that the level at the 56 day mark was approximately 4130 mg L^?1. In contrast, the artificial Atacama brine showed no pronounced Li precipitation, even after 54 days, at which point the Li concentration was 21,800 mg L^?1. The initial concentrations of Na and K in the Atacama brine were higher than those in the Uyuni brine, and the Atacama solution still retained K after 54 days of evaporation. The order of precipitation of cation species during the evaporation of both brines was: Na, followed by K, Mg, and Li. Thus, Li precipitation in the Atacama brine might be prevented due to the more favored precipitations of Na and K, such that significant Li removal did not occur in this brine.  相似文献   

Fragmentation of star-forming clouds enriched with the first dust     

Raffaella Schneider  Kazuyuki Omukai  Akio K. Inoue  Andrea Ferrara 《Monthly notices of the Royal Astronomical Society》2006,369(3):1437-1444

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Attenuation law of normal disc galaxies with clumpy distributions of stars and dust     

Akio K. Inoue † 《Monthly notices of the Royal Astronomical Society》2005,359(1):171-182

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REE abundances in the matrix of the Allende (CV) meteorite: Implications for matrix origin     

Mutsuo Inoue  Makoto Kimura  Noboru Nakamura 《Meteoritics & planetary science》2004,39(4):599-608

Abstract— The trace element distributions in the matrix of primitive chondrites were examined using four least‐contaminated matrix specimens from the polished sections of the Allende (CV) meteorite. Analysis of rare earth element (REE), Ba, Sr, Rb, and K abundances by isotope dilution mass spectrometry revealed that the elemental abundances of lithophile elements except for alkali metals (K, Rb) in the specimens of the Allende matrix studied here are nearly CI (carbonaceous Orgueil) chondritic (～1 × CI). Compared to refractory elements, all the matrix samples exhibited systematic depletion of the moderately volatile elements K and Rb (0.1–0.5 × CI). We suggest that the matrix precursor material did not carry significant amounts of alkali metals or that the alkalis were removed from the matrix precursor material during the parent body process and/or before matrix formation and accretion. The matrix specimens displayed slightly fractionated REE abundance patterns with positive Ce anomalies (CI‐normalized La/Yb ratio = 1.32–1.65; Ce/Ce* = 1.16–1.28; Eu/Eu* = 0.98–1.10). The REE features of the Allende matrix do not indicate a direct relationship with chondrules or calcium‐aluminum‐rich inclusions (CAIs), which in turn suggests that the matrix was not formed from materials produced by the breakage and disaggregation of the chondrules or CAIs. Therefore, we infer that the Allende matrix retains the REE features acquired during the condensation process in the nebula gas.  相似文献   

Hematite in pyrophyllite ore deposits, Shobara district, southwestern Japan     

M. Ohkawa  Y. Yamashita  M. Inoue  R. Kitagawa  S. Takeno 《Mineralogy and Petrology》2000,70(1-2):15-23

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Indigenous Knowledge on Soil Classification of Ethnic Groups in Luang Prabang Province of the Lao PDR     

Linkham Douangsavan Vongpaphane Manivong Anan Polthanee Roengsak Katawatin Yoshio Inoue 《山地科学学报》2006,3(3):247-258

Introduction Traditional agriculture based on indigenous knowledge (IK) has been practiced in many areas for centuries. Such practices are often the basis of very sustainable technologies, which are potentially suitable for developmental programs. Polthanee (2001) reported that such farmer practices have been repeatedly found to be valid, rational and usually suited to the local environmental conditions. Moreover, with increased under- standing of agro-ecosystems, professionals in agricultura…  相似文献   

Amount of intergalactic dust: constraints from distant supernovae and the thermal history of the intergalactic medium     

Akio K. Inoue †  Hideyuki Kamaya 《Monthly notices of the Royal Astronomical Society》2004,350(2):729-744

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The X-ray astronomy satellite “ASCA”     

H. Inoue 《Experimental Astronomy》1993,4(1):1-10

ASCA (ASTRO-D), the fourth X-ray astronomy satellite of ISAS, was successfully launched on February 20, 1993. It carries nested thin-foil X-ray mirrors providing a large effective area over a wide energy range up to 12 keV. A set of CCD cameras and imaging gas scintillation proportional counters are placed on the focal plane.ASCA is a high-throughput imaging and spectroscopic X-ray observatory with these instruments.  相似文献