Search Results:　 1-20 of 85

1

Laterization process of ultramafic rocks in Siruka, Solomon Islands (Papers reported in the 6th international symposium on "novel carbon resource sciences")

Sagapoa Christopher V. , Imai Akira , Watanabe Koichiro

… The paper was reported in the 6th International Symposium on "Novel Carbon Resource Sciences" Nov. 12-13, 2010Silica and magnesia in the bed rock and the saprolitic zones have been removed and only the residual elements (iron, chromium, aluminium, manganese, cobalt and nickel) remain in the limonitic zone. …

Journal of novel carbon resource sciences 3, 32-39, 2011-02

IR
2

A note on compositional variation of olivine and pyroxene in thermally metamorphosed ultramafic complexes from SW Japan

野坂俊夫

… This short article presents some diagrams showing the compositional variations of primary and metamorphic olivine, orthopyroxene and clinopyroxene in peridotites and serpentinites from thermally metamorphosed ultramafic complexes in SW Japan. … Compared with primary pyroxenes, even though their compositions could be variable depending on original rock composition, metamorphic orthopyroxene andmetamorphic clinopyroxene is clearly deficient in Cr(2)O(3) and CaO, and in Cr(2)O(3) and Al(2)O(3), respectively. …

Okayama University Earth Science Report 17(1), 1-5, 2010-12-24

IR
3

New Developments in Ophiolites Studies

ISHIWATARI Akira

… Definition of ophiolites and differences from other mafic-ultramafic complexes, III. … Special attention has been paid to recently discovered oldest and youngest ophiolites as well as the recent re-evaluation of “Troodos Debate” provoked by Miyashiro (1973), who threw a rock that stirred up the peaceful consensus among the worlds geologists that correlated ophiolites to mid-ocean ridges, and stimulated extensive geochemical and geotectonic studies on both ophiolites and ocean floor. …

Journal of Geography (Chigaku Zasshi) 119(5), 841-851, 2010

J-STAGE CrossRef
4

Ultramafic rocks in the Kotaki area, Hida Marginal Belt, central Japan: peridotitites of the Oeyama ophiolite and their metamorphism

Machi Sumiaki , Ishiwatari Akira

飛騨外縁帯の小滝地域に分布する超苦鉄質岩は2タイプに大別され，それらは（Type 1）初生的なかんらん岩，（Type 2）変成かんらん岩である．これらの一部は接触変成作用を被っている．同地域の超苦鉄質岩中の初生的な残存鉱物は，大江山オフィオライトのものに類似し，大江山岩体以外では初のAlに富むぜん虫状スピネル（Cr#＝33〜38）を含むものもある．変成かんらん岩は，Naに富むトレモラ閃石を含むこ …

The Journal of the Geological Society of Japan 116(6), 293-308, 2010

J-STAGE
5

H_2 generation by experimental hydrothermal alteration of komatiitic glass at 300℃ and 500 bars : A preliminary result from on-going experiment

YOSHIZAKI MOTOKO , SHIBUYA TAKAZO , SUZUKI KATSUHIKO , SHIMIZU KENJI , NAKAMURA KENTARO , TAKAI KEN , OMORI SOICHI , MARUYAMA SHIGENORI

Geochemical Journal 43(6), 17, 2009-12-01

References (38) Cited by (2)
6

Phylogeography of a Rare Serpentine Plant, Arenaria katoana Makino (Caryophyllaceae)

KAWASE DAIJU , YUMOTO TAKAKAZU , SATO KEN

… Arenaria katoana (Caryophyllaceae) is a rare endemic plant that occurs disjunctly on ultramafic rock sites in Japan. …

APG : Acta phytotaxonomica et geobotanica 60(1), 19-25, 2009-03-31

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7

Serpentinization reaction variance inferred from magnetic properties: case study of variously serpentinized peridotites from the Iwanai-dake ultramafic rock body, Hokkaido, Japan [in Japanese]

森尻理恵 , 中川充

Bulletin of the Geological Survey of Japan 60(7・8), 381-394, 2009
8

Origin of sapphirine-bearing garnet-orthopyroxene granulites: possible hydrothermally altered ocean floor

Baba Sotaro , Shinjo Ryuichi , Windley Brian F.

… This study investigates a thin, discontinuous layer of sapphirine-bearing garnet-orthopyroxene (SGO) granulite within a Palaeoproterozoic mafic granulite together with metamorphosed mafic and ultramafic rocks, micaceous rocks rich in magnetite and pyrite, and marble. … however, in terms of whole-rock element abundances, the former is relatively enriched in MgO and depleted in CaO, Na_2O, MnO, Sr, and Eu. …

Polar science 2(2), 87-107, 2008-06

Cited by (1)
9

Serpentinite gravels in the Nagahama Formation, Kazusa Group, Boso Peninsula, Central Japan : Implications for behavior of ultramafic bodies emplaced at the fore-arc region [in Japanese]

TAKAHASHI Naoki , ARAI Shoji , KOTAKI Shuzo

Petrological features of gravels of serpentinized peridotites in the Nagahama Formation of the upper Kazusa Group (middle Pleistocene), distributed in the central Boso Peninsula, are examined in detai …

Japanese Magazine of Mineralogical and Petrological Sciences 37(2), 39-56, 2008-03-30

J-STAGE CrossRef References (72)
10

Petrogenesis of the Neoproterozoic Bikilal-Ghimbi gabbro, Western Ethiopia

WOLDEMICHAEL Binyam W. , KIMURA Jun-ichi

… The metamorphic belt consists of high-grade biotite gneisses, low-grade volcanogenic sediments, and mafic-ultramafic complexes. … Each rock type can be divided into apatite-bearing and apatite-free subtypes. … An estimation of the parental magma composition using the trace element abundance in fresh clinopyroxenes and fresh olivine gabbro bulk rock suggests an intraplate-type tholeiite. …

Journal of Mineralogical and Petrological Sciences 103(1), 23-46, 2008-02-01

J-STAGE CrossRef References (52)
11

Molecular phylogenetic analysis of the infraspecific taxa of Erigeron thunbergii A. Gray distributed in ultramafic rock sites

KAWASE DAIJU , YUMOTO TAKAKAZU , HAYASHI KAZUHIKO , SATO KEN

Plant species biology 22(2), 107-115, 2007-08-01

References (33)
12

Clinopyroxene-rich lherzolite xenoliths from Bir Ali, Yemen : possible product of peridotite/melt reactions

ALI Murad , ARAI Shoji

… Ultramafic xenoliths in Pliocene-Quaternary basalts from Bir Ali, the Shabwa Governorate, southern Yemen, were studied to examine upper mantle processes related to continental rifting. … They show a great variety of rock types: spinel lherzolites, harzburgites, dunites, clinopyroxene (= cpx)-rich lherzolites, wehrlites and pyroxenites. …

Journal of Mineralogical and Petrological Sciences 102(2), 137-142, 2007-04-01

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13

Petrological characteristics and tectonic setting of the Hantaishir ophiolite complex, Altai region, West Mongolia [in Japanese]

BAYARMANDAL Lkhamsuren

… Both massifs are sandwiched in the large serpentinite melange. The dominant ultramafic rock is harzburgite in the ophiolite complex and it is highly altered. …

Japanese Magazine of Mineralogical and Petrological Sciences 36(2), 42-57, 2007-03-30

J-STAGE CrossRef References (48)
14

Mineral ages for multi isotope system in phlogopite-bearing pyroxene granulite and felsic gneiss, the Howard Hills, Enderby Land, East Antarctica: Possible Proterozoic tectonothermal events in the Napier Complex

Miyamoto Tomoharu , Yoshimura Yasutaka , Dunkley Daniel J. , Motoyoshi Yoichi , Carson Christopher J.

… Large mafic to ultramafic blocks in felsic gneisses on the northern part of the Howard Hills, Napier Complex, East Antarctica are accompanied by phlogopite-bearing pyroxene granulite occurring in the margins of the block. … An internal Sm-Nd isochron of whole rock and orthopyroxene and feldspar separated from the same sample shows 1.85±0.15Ga. …

Polar geoscience 19, 152-172, 2006-10

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15

O-158 Whole-rock and isotopic compositions of ultramafic and mafic metamorphic rocks in the Lutzow-Holm Complex, East Antarctica [in Japanese]

SUDA Yoshimitsu , KAWANO Yoshinobu

日本地質学会学術大会講演要旨 113, 122, 2006-09-08

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16

Petrology and geochemistry of metamorphosed basaltic pillow lava and basaltic komatiite in the Mauranipur area : subduction related volcanism in the Archean Bundelkhand craton, Central India

MALVIYA Vivek P. , ARIMA Makoto , PATI Jayanta K. , KANEKO Yoshiyuki

… The occurrence of metamorphosed basaltic pillow lava in close association with serpentinized ultramafic rock, metamorphosed basaltic komatiite, volcaniclastic metasediment, and banded iron formation (BIF) in the Mauranipur area is the first explicit evidence for subduction related submarine volcanism in the Archean Bundelkhand craton, Central India. …

Journal of Mineralogical and Petrological Sciences 101(4), 199-217, 2006-08-01

J-STAGE CrossRef References (85)
17

九州中部,熊本県八代市泉町の"黒瀬川帯"蛇紋岩メランジュ中の含ひすい輝石変斑れい岩 [in Japanese]

斎藤眞 , 宮崎一博

Bulletin of the Geological Survey of Japan 57(5・6), 169-176, 2006
18

Comparison of Ni/Zn Accumulation Ability of Thlaspi japonicum from Three Different Areas in Hokkaido (Plant Nutrition)

Mizuno Takafumi , Obata Hitoshi , Horie Kenji , Nosaka Shiro , Mizuno Naoharu

… In the present study, we investigated the ability of wild Thlaspi japonicum plants inhabiting non-ultramafic soil areas of Hokkaido to accumulate Ni/Zn. … japonicum plants growing on Rebun Island (Rebun-T) accumulated small amounts of Ni, while the plants cultivated on ultramafic rock soil accumulated large amounts of Ni, like T. … japonicum plants transplanted on both ultramafic soil or Andosol accumulated over 100 mg kg^<-1> …

Soil science and plant nutrition 51(4), 589-594, 2005-08

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19

Variations of platinum group elements in ultramafic xenoliths [in Japanese]

SENDA Ryoko

… The PGE abundances are generally very low on the order of ppb or less in felsic rocks, and are relatively high in ultramafic rocks. … The pattern shows characteristic varieties on their rock species or tectonic settings. … Investigation of the PGE behavior in ultramafic xenoliths and their host rocks would clarify the interactions which xenoliths have experienced in upper mantle materials or during the uplift. …

Japanese Magazine of Mineralogical and Petrological Sciences 34(4), 195-204, 2005-07-30

J-STAGE CrossRef References (57)
20

Rock densities for the geologic units in the Japanese Islands : an estimate from the database PROCK (Physical Properties of Rocks of Japan) [in Japanese]

Iwaya Toshimitsu , Kano Kazuhiko

… Only few data is available for mafic plutonic rocks and ultramafic rocks. …

Journal of the Geological Society of Japan 111(7), 434-437, 2005-07-15

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