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Hydrothermal Precipitation of Chromites

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Acta Geologica Sinica(English Edition) 2015年第A2期89卷 2-2页

作者： arai shoji Department of Earth Sciences Kanazawa University

Chromite is a typical refractory igneous mineral, precipitated from mafic magmas at relatively high temperatures. Chromites commonly occur in sedimentary, metamorphic and metasomatic rocks, where they are interpreted as relics of an igneous phase and serve as the source of Cr for low-temperature Cr-bearing minerals. We present evidence for the dissolution and nucleation of chromite within hydrothermal solutions from the northern Oman ophiolite.

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深成岩石和同源岩石的岩相标志——日本岛弧东北部岩手火山和利尻岛火山的某些火山岩中橄榄石和铬尖晶石间成分关系

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西北地质 1988年第4期 46-50+39页

作者： shoji arai Natsuko Takahashi 程淑兰

橄榄石和铬尖晶石一般形成于原始岩浆早期沉淀相与可能是残留物质的地幔橄榄岩主要相内。地幔橄榄岩中橄榄石类的镁橄榄石（Fo）含量和铬尖晶石的Cr/（Cr+Al）原子比（=Cr*）在Fo—Cr*面中构成了一条狭窄的带（图1）,该带称为“橄榄石... 详细信息

橄榄石和铬尖晶石一般形成于原始岩浆早期沉淀相与可能是残留物质的地幔橄榄岩主要相内。地幔橄榄岩中橄榄石类的镁橄榄石（Fo）含量和铬尖晶石的Cr/（Cr+Al）原子比（=Cr*）在Fo—Cr*面中构成了一条狭窄的带（图1）,该带称为“橄榄石—尖晶石地幔列阵（arai,1987b）。橄榄石-尖晶石地幔列阵富Cr*的一半和贫Cr*的一半分别由二辉橄榄岩和方辉橄榄岩组成。很可能橄榄石-尖晶石地幔列阵是一些未亏损的橄榄岩（贫Fo和Cr*的二辉橄榄岩）在连续岩浆萃取作用期间,残留下来的地幔尖晶石橄榄岩（Jaques和格林,1980;arai,1987ab）。橄榄石和铬尖晶石一般形成于原始岩浆早期沉淀相与可能是残留物质的地幔橄榄岩主要相内。地幔橄榄岩中橄榄石类的镁橄榄石（Fo）含量和铬尖晶石的Cr/（Cr+Al）原子比（=Cr*）在Fo—Cr*面中构成了一条狭窄的带（图1）,该带称为“橄榄石—尖晶石地幔列阵（arai,1987b）。橄榄石-尖晶石地幔列阵富Cr*的一半和贫Cr*的一半分别由二辉橄榄岩和方辉橄榄岩组成。很可能橄榄石-尖晶石地幔列阵是一些未亏损的橄榄岩（贫Fo和Cr*的二辉橄榄岩）在连续岩浆萃取作用期间,残留下来的地幔尖晶石橄榄岩（Jaques和格林,1980;arai,1987ab）。相对原始的岩浆在Fo—Cr*面有各自的分异趋势,分异是在橄榄石-尖晶石地幔列阵上或其附近开始的（arai,1987a）。Fo—Cr*面分异趋势开始的这些点上或其附近,橄榄石-尖晶石地幔列阵上的橄榄岩可能是原始岩浆残留的对应物。换句话说,Fo-Cr*面上原始岩浆的分异趋势是在其残留橄榄岩上或其附近开始的。因为在物理条件如果没有多大变化的情况下,某些原始岩浆的残留相和最早沉淀相在化学成分上几乎是相同的。岛弧玄武质岩浆经过萃取之后,残留物质会是什么样的橄榄岩呢?Tatsumi等（1983）的实验已经表明日本岛弧东北的原始拉斑玄武岩可能与一些地幔方辉橄榄岩相应,而原生高铝和碱性橄榄玄武岩则可能与一些地幔二辉橄榄岩相应。我们想从日本岛弧东北地幔橄榄岩（=橄榄石—尖晶石地幔列阵）与第四纪火山的玄武质和安山质岩浆中橄榄石和铬尖晶石间的成分关系来探讨这个问题。我们选择了岩手火山和利尻岛火山进行研究。前者是火山前缘附近的典型火山之一,产岛弧拉斑玄武岩（Onuma,1962;Nakagawa,1987）。后者是利尻岛和大岛—大岛火山对之一,产碱性橄榄玄武岩（Katsui,1953;Katsui等,1979）,位子俯冲洋板块之上约300公里。岩手火山岩的大量化学分析资料可参阅Onuma（1962）的著作,而利尻岛火山则可参考Katsui（1953）和Matsui（1967）的。岩石描述岩手火山的玄武岩和安山岩:我们测了1801、1802和1803三个样品。1801号采自Onigajo脊,属于Onuma（1962）的Onigajo熔岩流或Nakagawa（1987）的Onigajo火成碎屑岩。1802和1803采自Kurokura山以东,Ubakura山以西之间的鞍部,可能属于Onuma（1962）的Kurokura山熔岩流或Nakagawa（1987）的Ubakura山下部熔岩。这些熔岩属于Onuma（1962）的老火山期或Nakagawa（1987）的老岩手期。1801和1802号样为安山岩,含橄榄石、紫苏辉石、辉石、斜长石和磁铁矿斑晶,前者为粒间结构,后者为填间结构。1803号样为玄武岩,具橄榄石和斜长石斑晶,呈粒间结构。这些岩石的橄榄石斑晶常常有自形的铬尖晶石小包体（<50微米）。在新火山期的Yakehashiri安山岩（Onuma,1962）或新岩手期安山岩（Nakagawa,1987）中,橄榄石斑晶经常被斜方辉石反应边所包围。偶尔也见有铬尖晶石小包体。本次研究所测定的岩手火山岩中橄榄石斑晶呈半自形到他形,具不明显的分带。利尻岛火山玄武岩:调查了出露在Oniwaki附近的碱性橄榄玄武岩（样号RSR71404）。这种岩石属于利尻岛火山南侧寄生火山锥之一的Oniwaki-pon山喷发出来的熔岩流（Matsui等,1967）。该熔岩富含橄榄石斑晶,这种现象可能是晶体堆积的结果。薄片观察呈全晶质结构和不等粒结构。较大的晶体由橄榄石、辉石和斜长石构成,有时构成晶体团块。橄榄石呈自形,县明显分带,一般含微小的铬尖晶石包体（<50微米）。矿物化学共生的橄榄石和铬尖晶石（=铬尖晶石包体和主矿物橄榄石）是用JXA50A型电子探针分析的。橄榄石的成分变化:利尻岛火山和岩手火山的岩石里,甚至一块薄片内橄榄石的化学成分都有明显变化。两个火山的岩石中橄榄石的Fo含量总是低于86（表1,图2）。NiO和MnO的含量分别与Fo含量的变化一致和不一致。橄榄石的这种化学成分变化很可能是由一些更为

关键词：火山岩石

Devonian to Permian evolution of the Paleo-Tethys Ocean:New evidence from U–Pb zircon dating and Sr–Nd–Pb isotopes of the Darrehanjir–Mashhad “ophiolites”,NE Iran

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Devonian to Permian evolution of the Paleo-Tethys Ocean:New ...

Analysis of in-bore balloting and control of jump variability

中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Hadi Shafaii Moghadam Xian-Hua Li Xiao-Xiao Ling Robert J.Stern Mohamed Zaki Khedr Massimo Chiaradia Ghasem Ghorbani shoji arai Akihiro Tamura State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences School of Earth Sciences Damghan University Geosciences Dept. University of Texas at Dallas Department of Earth Sciences Kanazawa University Department of Geology Faculty of ScienceKafrelsheikh University Département de Minéralogie Université de Genève

Middle to Late Paleozoic ophiolites,which are remnants of the Paleo-Tethys Ocean,are aligned in two main zones in northern Iran:Darrehanjir-Fariman-Mashhad,and Rasht in the north and Jandagh-Anarak ophiolites to the *** new U-Pb zircon dating results show that the-200 km long Darrehanjir-Mashhad mafic-ultramafic body is not a single ophiolite but a composite igneous complex composed of Permian pillow lavas and pelagic sediments in fault contact with a small outcrop of Devonian intrusive and ultramafic *** intrusive rocks have U-Pb zircon ages of 380.6±3.7 Ma and 382.9±3.7 Ma respectively,-100 Ma older than published ages for gabbros and radiolarites intercalated with lavas near Mashhad and *** peridotites from the Devonian complex contain low Cr#spinel,similar to that in MORB-type *** Darrehanjir gabbros and Permian Mashhad sequences both have boninitic and calc-alkaline signatures,***δOvalues from the Devonian ferrodiorite(δO-4.6±0.3‰)are slightly lower than the 5.2 to5.4‰expected for MORB-type zircons whereas Devonian plagiogranitic zircons mostly haveδO103)and lowεNd(<5.4)for both Permian and Devonian *** Darrehanjir-Mashhad rocks are characterized by radiogenicPb/Pb andPb/Pb,indicating the involvement of subducted terrigenous sediments in the *** Mashhad-Darrehanjir mafic-ultramafic complex demonstrates that this part of Paleo-Tethys evolved from oceanic crust formation above a subduction zone in Devonian time to accretionary convergence in Permian *** Paleozoic ophiolites and oceanic igneous complexes along with those of the Caucasus and Turkey in the west and Afghanistan,Turkmenistan

关键词： Paleozoic ophiolites U–Pb zircon dating Zircon εHf(t) Komatiite Supra-subduction zone-type magmatism

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Defence Technology（防务技术） 2019年第5期15卷 721-734页

作者： Satoru shoji Wakayama-dai ShimamotoOsakaJapan21-104

The variability of projectile jump is the long-term issue to improve weapon *** we have many simulation codes to predict ***,these codes cannot explain explicitly how the variability of jump *** aims of this paper are,(1)to give fundamental explanations for the variability of Jump,and (2)to offer design factors to make the variability of Jump *** model presented here was formulated in accordance with the transition of the system in reverse way commencing from the target impact stage to the chambering *** of the simulation are generic 120mm smooth bore and long rod system which are extremely simplified to the vibration of tube,the spring effect by sabot,and the free-ends beam of *** calculations clarified that high Jump-variability is generated only when the last rebound is on the muzzle *** particular state of rebound is achieved by many combinations of *** map named JV-Chart is proposed to show the high Jumpvariability zone.

关键词： Jump variability Coupled vibration In-bore balloting Cantilever tube

Kostka functions associated to complex reflection groups and a conjecture of Finkelberg-Ionov

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Science China Mathematics 2018年第2期61卷 353-384页

作者： Toshiaki shoji Department of Mathematics Tongji University

Kostka functions K_(λ,μ)~±(t), indexed by r-partitions λ and μ of n, are a generalization of Kostka polynomials K_(λ,μ)(t) indexed by partitions λ,μ of n. It is known that Kostka polynomials have an interpretation in terms of Lusztig's partition function. Finkelberg and Ionov(2016) defined alternate functions K_(λ,μ)(t) by using an analogue of Lusztig's partition function, and showed that K_(λ,μ)(t) ∈Z≥0[t] for generic μ by making use of a coherent realization. They conjectured that K_(λ,μ)(t) coincide with K_(λ,μ)^-(t). In this paper, we show that their conjecture holds. We also discuss the multi-variable version, namely, r-variable Kostka functions K_(λ,μ)~±(t_1,…,t_r).

关键词： Kostka functions complex reflection groups conjecture of Finkelberg-Ionov

2,2′-Biazulene diimide-based conjugate polymers for highperformance field-effect transistors

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Science China Chemistry 2018年第8期61卷 973-974页

作者： Taku shoji Shunji Ito Graduate School of Science and Technology Shinshu University Graduate School of Science and Technology Hirosaki University

Azulene,which is one of the non-alternating 10π-electron aromatic compounds,has attracted the interest of many research groups due to the application to material sciences utilizing the unique optoelectronic properties.

关键词： Th THF Biazulene diimide-based conjugate polymers for highperformance field-effect transistors PTB

Limits to Resources,Economic Growth and Happiness

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Journal of Shanghai Jiaotong university(Science) 2012年第3期17卷 364-369页

作者： TANIGUCHI shoji Graduate School of Environmental Studies Tohoku UniversitySendai 980-8579Japan

Terrible scenario for the future aspect of our society was issued by ＂The Limits to Growth＂. Basic problems that we confront are the restricted natural resources and the environment. Regarding the resources, the overall average of the reserve/production ratio is predicted to fall below 10 years by 2040. Aggressive developments of mines based on the sense of urgency for metal resources cause strong conftiction with the environment and the people living there. Resultantly, urban mine becomes more realistic than before. From the view point of ecological foot print, 5.3 globes are needed if all the people living in the world attain the affluent life same as USA. On the other hand, it is clear that we can get larger utility by smaller goods if our scale of satisfaction is reduced. We have to notice that happiness is our ultimate purpose, economy and industry are intermediate, and natural resources support the all from the basis.

关键词： Leconomic growth natural resources happiness environmental load assessment

Innovative use of controlled availability fertilizers with high performance for intensive agriculture and environmental conservation

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Science China(Life Sciences) 2005年第z2期48卷 912-920页

作者： Sadao shoji Professor Emeritus Tohoku University Sendai 982-0034 Japan Technical Adviser Chisso CorporationTokyo 104-8555Japan

A variety of slow release fertilizers, controlled release (availability) fertilizers (CAFs),and stability fertilizers have been developed in response to the serious drawbacks of the conventional fertilizers since the early 1960's. Of these fertilizers, CAFs which are coated with resin are consumed in the largest quantity in the world. Selecting CAFs with higher performance, the author will discuss about: 1) Innovation of agro-technologies for various field crops including new concepts of fertilizer application, 2) high yielding of field crops, 3) enhancing quality and safety of farm products, and 4) controlling the adverse effect of intensive agriculture on the environment.

关键词： controlled availability fertilizers, intensive agriculture, environmental conservation.

Updatable timed automata with one updatable clock

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Science China(Information Sciences) 2018年第1期61卷 99-112页

作者： Guoqiang LI Yunqing WEN shoji YUEN BASICS School of Software Shanghai Jiao Tong University Graduate School of Information Science Nagoya University

Updatable timed automata(UTAs) proposed by Bouyer ***., is an extension of timed automata(TAs) having the extra ability to update clocks in a more elaborate way than simply reset them to *** reachability of UTAs is generally undecidable, which can be easily gained by regarding a pair of clocks as updatable counters. This paper investigates a subclass of UTAs by restricting the number of updatable clocks to be one. We will show that(1) the reachability of general UTAs with one updatable clock(UTA1 s)is still undecidable, and(2) that of UTA1 s under diagonal-free constraints is decidable, and the complexity is Pspace-complete. The former is achieved by encoding Minsky machines to the general UTA1 s, where two counters are simulated by the updatable clock. The latter is gained by regarding a region of a UTA1 to be an unbounded digiword, and encoding sets of digiwords that are accepted by a one counter automaton where regions are generated as the value of the counter.

关键词： updatable timed automata one counter automata digiword reachability problem