Analytical results and outcrop photographs of Tomari volcanic rocks, Shimokita Peninsula, Aomori Prefecture
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Fig. S1. Outcrop photographs of the Tomari volcanic rocks. (a) Lamination of volcanic breccias of Stage I (Kanatsuyama Andesite, 41.1316°N, 141.3940°E). (b) Cross-lamination of volcanic breccias of Stage I (Kanatsuyama Andesite, 41.1322°N, 141.3955°E). The scale is 1 m. (c) Volcanic breccias colored black and red in the lower unit of Stage II (Gassan Andesite, 41.1051°N, 141.3729°E). (d) Pillow lava in the upper unit of Stage II (Tomari Basalt, 41.0995°N, 141.3980°E). (e) Massive light-reddish lava of Stage III (Takahoko Andesite, 41.0368°N, 141.3637°E). (f) Reddish volcanic breccia of Stage IV (Fukkoshi Andesite, 41.0361°N, 141.3162°E). Fig. S2. Modal compositions of the Tomari volcanic rocks (surface and SN-010 core samples). Data are from Takimoto and Shuto (1994) and this study (red shading). Fig. S3. Histograms of anorthite content (An%) in plagioclase for the Tomari volcanic rocks (surface and SN-010 core samples). An% = 100 × Ca/(Ca + Na + K) (atomic ratio). Fig. S4. Quadrilateral diagrams of Mg–Ca–Fe in pyroxene for the Tomari volcanic rocks (surface and SN-010 core samples). En: enstatite, Fs: ferrosilite, Di: diopside, Hd: hedenburgite. Division lines are from Suwa and Kuroda (2006). Fig. S5. Fe2+–Fe3+–Ti ternary diagrams of Fe–Ti oxides for the Tomari volcanic rocks (surface and SN-010 core samples). Mt: magnetite, Usp: urvöspinel, Hem: hematite, Ilm: ilmenite. Calculation of the Fe2+/Fe3+ distribution of Fe–Ti oxides was conducted to ensure cation charge balance in stoichiometry. Fig. S6. Histogram of forsterite content (Fo%) in olivine for the Tomari Basalt. Fo% = 100 × Mg/(Mg + Fe) (atomic ratio). Fig. S7. Representative diagrams of the whole-rock chemical compositions of the Tomari volcanic rocks (surface and SN-010 shallow and deep core samples). Large symbols show new data from this study, and small symbols show data from the literature (Takimoto and Shuto, 1994; Hanyu et al., 2006). The division line of tholeiite (TH) and calc-alkaline (CA) rock series on the FeO*/MgO vs. SiO2 diagram is from Miyashiro (1974) and extends linearly to a basaltic composition. Fig. S8. Bivariate diagrams of Ba and Rb (large-ion lithophile elements) vs. loss on ignition (LOI) and vs. Zr (highfield- strength element) for the Tomari volcanic rocks (surface and SN-010 shallow and deep core samples). Table S1. Modal compositions of the Tomari volcanic rocks.[Foot Note] Pl : plagioclase, Ol : olivine, Cpx : clinopyroxene, Opx : orthopyroxene, Opq : opaque minerals. Table S2. Whole-rock geochemical compositions of the Tomari volcanic rocks.
补充图S1 托马里(Tomari)火山岩露头照片。(a) 第一阶段火山角砾岩(volcanic breccias)的层理构造(金津山安山岩,41.1316°N,141.3940°E)。(b) 第一阶段火山角砾岩的交错层理构造(金津山安山岩,41.1322°N,141.3955°E)。比例尺为1米。(c) 第二阶段下部单元中呈黑、红色的火山角砾岩(月山安山岩,41.1051°N,141.3729°E)。(d) 第二阶段上部单元中的枕状熔岩(pillow lava)(托马里玄武岩,41.0995°N,141.3980°E)。(e) 第三阶段的浅红色块状熔岩(高子安山岩,41.0368°N,141.3637°E)。(f) 第四阶段的红色火山角砾岩(福越安山岩,41.0361°N,141.3162°E)。
补充图S2 托马里火山岩的矿物组成(modal compositions)(野外露头及SN-010岩芯样品)。数据取自Takimoto与Shuto(1994)及本研究(红色阴影区)。
补充图S3 托马里火山岩斜长石(plagioclase)中钙长石组分含量(An%)的直方图(野外露头及SN-010岩芯样品)。An% = 100 × Ca/(Ca + Na + K)(原子比)。
补充图S4 托马里火山岩辉石(pyroxene)的Mg-Ca-Fe四元图解(野外露头及SN-010岩芯样品)。其中:顽火辉石(enstatite, En)、铁辉石(ferrosilite, Fs)、透辉石(diopside, Di)、钙铁辉石(hedenburgite, Hd)。图解分区线取自Suwa与Kuroda(2006)。
补充图S5 托马里火山岩铁钛氧化物(Fe-Ti oxides)的Fe²⁺-Fe³⁺-Ti三元图解(野外露头及SN-010岩芯样品)。其中:磁铁矿(magnetite, Mt)、钛铁尖晶石(urvöspinel, Usp)、赤铁矿(hematite, Hem)、钛铁矿(ilmenite, Ilm)。为保证化学计量下的阳离子电荷平衡,对铁钛氧化物的Fe²⁺/Fe³⁺分布进行了计算。
补充图S6 托马里玄武岩橄榄石(olivine)中镁橄榄石组分含量(Fo%)的直方图。Fo% = 100 × Mg/(Mg + Fe)(原子比)。
补充图S7 托马里火山岩全岩化学成分(whole-rock chemical compositions)代表性图解(野外露头及SN-010浅部、深部岩芯样品)。大图符号代表本研究获得的新数据,小图符号代表文献数据(Takimoto与Shuto, 1994;Hanyu等, 2006)。在FeO*/MgO vs. SiO₂图解中,拉斑玄武岩(tholeiite, TH)与钙碱性岩(calc-alkaline, CA)系列的分区线取自Miyashiro(1974),并线性延伸至玄武岩成分区间。
补充图S8 托马里火山岩的钡(Ba)与铷(Rb,均为大离子亲石元素(large-ion lithophile elements))分别与烧失量(loss on ignition, LOI)、锆(Zr,高场强元素(highfield-strength element))的二元图解(野外露头及SN-010浅部、深部岩芯样品)。
附表S1 托马里火山岩矿物组成。[脚注] 斜长石(plagioclase, Pl)、橄榄石(olivine, Ol)、单斜辉石(clinopyroxene, Cpx)、斜方辉石(orthopyroxene, Opx)、不透明矿物(opaque minerals, Opq)。
附表S2 托马里火山岩全岩地球化学组成。
创建时间:
2023-12-05



