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Toki Granite

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Journal Article
Published: 01 May 2015
American Mineralogist (2015) 100 (5-6): 1134–1152.
...Takashi Yuguchi; Eiji Sasao; Masayuki Ishibashi; Tadao Nishiyama Abstract This paper describes the biotite chloritization process with a focus on mass transfer in the Toki granitic pluton, Central Japan, and also depicts the temporal variations in chemical characteristics of hydrothermal fluid...
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Map of Southwest Japan showing location of the <b>Toki</b> <b>granite</b> (Tono district ...
Published: 01 May 2015
Figure 1 Map of Southwest Japan showing location of the Toki granite (Tono district = TKG; square symbol) in Central Japan, together with the distribution of San-in, Sanyo, and Ryoke Belts in the Inner Zone of Southwest Japan, after Ishihara and Chappell (2007) .
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The <b>Toki</b> <b>granitic</b> pluton and the Mizunami Underground Research Laboratory. ...
Published: 01 April 2019
Figure 1. The Toki granitic pluton and the Mizunami Underground Research Laboratory. ( a ) Map of Southwest Japan showing the location of the Toki granite (Tono district = TKG; square symbol) in central Japan, together with the distribution of the San-in, Sanyo and, Ryoke Belts in the Inner Zone
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The <b>Toki</b> <b>granitic</b> pluton. ( a ) Geologic map of the Tono district showing t...
Published: 01 May 2015
Figure 2 The Toki granitic pluton. ( a ) Geologic map of the Tono district showing the Toki granite after Itoigawa (1980) , the Mizunami Underground Research Laboratory and the borehole sites. The topographic contours inside the Tono district are based on Geographical Survey Institute, 1:25 000
Journal Article
Published: 01 February 2006
Geochemistry: Exploration, Environment, Analysis (2006) 6 (1): 33–48.
... Uranium Deposit. The derived constraints are compatible with models of deposit formation, which call for leaching of uranium from the upper weathered zone of the Toki Granite by relatively oxidizing groundwaters that are near-neutral to moderately alkaline and carboniferous. The oxidizing groundwaters...
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Journal Article
Published: 01 April 2016
Clays and Clay Minerals (2016) 64 (2): 86–107.
... alteration, X-ray diffraction (XRD) analysis and K-Ar dating were performed on clay samples from the Kojaku Granite of central Japan, including fault gouge along an active fault. The area studied is suitable for understanding thermal constraints on clay mineralization because the wall rock is homogeneous...
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Journal Article
Published: 01 May 2002
Quarterly Journal of Engineering Geology and Hydrogeology (2002) 35 (2): 189–202.
... with less investigation. In the study area, Miocene to Pleistocene sedimentary rocks lie within a small Neogene basin developed on the eroded late Cretaceous Toki Granite ( Fig. 1 ). The sedimentary rocks consist of almost horizontally bedded sandstones, siltsones, mudstones and local conglomerates...
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Journal Article
Published: 01 February 2006
Geochemistry: Exploration, Environment, Analysis (2006) 6 (1): 5–12.
... ). Fig. 3 Contour map of the unconformity between the Mizunami Group, which hosts the Tsukiyoshi orebody, and the basement Toki Granite ( PNC 1994 ). The mineralized zone is distributed along a palaeochannel eroded into the basement granite ( Fig. 3 ). This palaeochannel represents...
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Journal Article
Published: 01 April 2019
American Mineralogist (2019) 104 (4): 536–556.
...Figure 1. The Toki granitic pluton and the Mizunami Underground Research Laboratory. ( a ) Map of Southwest Japan showing the location of the Toki granite (Tono district = TKG; square symbol) in central Japan, together with the distribution of the San-in, Sanyo and, Ryoke Belts in the Inner Zone...
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Journal Article
Published: 01 February 2006
Geochemistry: Exploration, Environment, Analysis (2006) 6 (1): 13–31.
... states and includes descriptions of all major environmental perturbations. Uranium is mobilized from the uppermost Toki granite under relatively oxidizing conditions, and is then transported by groundwater into overlying sedimentary rocks. There, reducing conditions promote uranium deposition...
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Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2012
DOI: 10.5382/SP.16.02
EISBN: 9781629490410
... migmatized Permo-Carboniferous granites. Schists similar to those of Sierra Limón Verde are exposed in Sierra San Lorenzo, west of the Toki Cluster, suggesting the presence of this basement in the Western Block (Fig. 3 ). In the Sierra de Moreno complex, epimetamorphic sedimentary rocks unconformably...
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Journal Article
Journal: Economic Geology
Published: 01 January 2016
Economic Geology (2016) 111 (1): 1–28.
... the mineralization period in the district up to ~1.0 m.y., suggesting a multistage, long-lived hydrothermal system. Integration of the molybdenite Re-Os dates and those from previous works at the El Abra and Toki clusters, accompanied by available tectonic reconstruction along the Domeyko fault system suggest...
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Variations in pH ( a ) and  f  CO 2   (g)  ( b ) relative to distance from ...
Published: 01 February 2006
Fig. 4 Variations in pH ( a ) and f CO 2 (g) ( b ) relative to distance from the unconformity at the boundary of the Toki Formation and Toki Granite.
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Calcite saturation indexes plotted versus distance from the unconformity at...
Published: 01 February 2006
Fig. 6 Calcite saturation indexes plotted versus distance from the unconformity at the boundary of the Toki Formation and Toki Granite. Shallow groundwaters (not shown) generally have SI ≪ 0.
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Contour map of the unconformity between the Mizunami Group, which hosts the...
Published: 01 February 2006
Fig. 3 Contour map of the unconformity between the Mizunami Group, which hosts the Tsukiyoshi orebody, and the basement Toki Granite ( PNC 1994 ).
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Eh as a function of depth relative to the unconformity surface at the bound...
Published: 01 February 2006
Fig. 2 Eh as a function of depth relative to the unconformity surface at the boundary of the Toki Formation and Toki Granite. In-situ Eh measurements are indicated by filled symbols; other symbols represent calculated values assuming equilibrium for the SO 4 2− /HS − couple (open circles
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Aqueous U ( a ) and Fe ( b ) concentrations in contemporary groundwaters of...
Published: 01 February 2006
Fig. 10 Aqueous U ( a ) and Fe ( b ) concentrations in contemporary groundwaters of the Toki Granite (symbols) compared with their calculated counterparts (lines) using the models in Table 2. Labels on curves refer to respective U and Fe concentrations in calcite (ppm).
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The Mizunami Underground Research Laboratory. ( a ) Location of shafts and ...
Published: 01 May 2015
. The samples were collected from the borehole 06MI03; altitude range from −274 m above sea level (masl) to −314 masl in the HBG of the Toki granite.
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Backscattered electron (BSE) image and chemical maps showing elemental Si, ...
Published: 01 May 2015
Figure 4 Backscattered electron (BSE) image and chemical maps showing elemental Si, Ti, K, and F concentrations of the unaltered biotite in the Toki granite. High concentrations are indicated by warm colors and low concentrations by cold colors. Ilmenite inclusion is identified by elemental Ti
Journal Article
Published: 01 July 2008
American Mineralogist (2008) 93 (7): 1080–1089.
... collected from drill core into a Cretaceous granite body [Toki Granite, about 68 Ma in age ( Suzuki and Adachi 1998 )] located in Tono, Gifu, Japan. The Toki Granite occurs beneath U-rich sedimentary rocks that have been studied as a possible natural analog of a high-level radioactive waste disposal site...
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