LA-ICP-MS zircon fission-track (FT) data of three tuff and tuffaceous sandstone samples in Memanbetsu and adjacent areas, Hokkaido, Japan.

<div><strong>Appendix 1.</strong> LA-ICP-MS fission-track zircon data. A: ID No. 2089. B: ID No. 19091812-1. C: ID No. 19061601.  The sampling locations are as follows; ID No. 2089: 43°55'63.82"N, E144°1'25.14"E. ID No. 19091812-1: 43°43'39.86"N, 144°1'13.18"E. ID No. 19061601: 43°59'58.29"N, 144°13'23.27"E.</div> <p>  </p> <div><strong>Appendix 1A </strong>[Foot Note] </div> <p>*Particles excluded from dating</p> <p>**E.S.: External Surface</p> <p>Ns: Number of counted fission tracks </p> <p>ρs: Spontaneous fission track density</p> <div>N_u-sp: Number of area-corrected ²³⁸U counts on unknown sample</div> <div>ρ_u-sp: Density of area-corrected ²³⁸U counts on unknown sample</div> <div>N_u-std : Total count of ²³⁸U on Uranium Standard sample</div> <div>ρ_u-std: Density of ²³⁸U counts on Uranium Standard sample</div> <div>P (χ²) : probability of obtaining the χ² value for ν degrees of freedom (ν = number or crystals - 1) </div> <div>Zeta value for fission track age calibration : 43.8 ± 2.0 (yr・cm^-2)</div> <div>age: t = (1/λ_D)・ln [1+λ_D・ζ・(Ns /Nu-sp)・ρu-std ]</div> <div>error: σt = t×[1/ΣNs + 1/ΣNu-sp + 1/ ΣNu-std +(σζ/ζ)²]^1/2 </div> <div>total decay constant of ²³⁸U: λ_D = 1.55125×10^-10 yr^-1</div> <p><br></p> <div><strong>Appendix 1B </strong>[Foot Note] </div> <p>*Particles excluded from dating</p> <p>**E.S.: External Surface</p> <p>Ns: Number of counted fission tracks </p> <p>ρs: Spontaneous fission track density</p> <div>N_u-sp: Number of area-corrected ²³⁸U counts on unknown sample</div> <div>ρ_u-sp: Density of area-corrected ²³⁸U counts on unknown sample</div> <div>N_u-std : Total count of ²³⁸U on Uranium Standard sample</div> <div>ρ_u-std: Density of ²³⁸U counts on Uranium Standard sample</div> <div>P (χ²) : probability of obtaining the χ² value for ν degrees of freedom (ν = number or crystals - 1) </div> <div>Zeta value for fission track age calibration : 41.5 ± 1.5 (yr・cm^-2)</div> <div>age: t = (1/λ_D)・ln [1+λ_D・ζ・(Ns /Nu-sp)・ρu-std ]</div> <p>error: σt = t×[1/ΣNs + 1/ΣNu-sp + 1/ ΣNu-std +(σζ/ζ)2]1/2 </p> <div>total decay constant of ²³⁸U: λ_D = 1.55125×10^-10 yr^-1</div> <p><br></p> <div><strong>Appendix 1C </strong>[Foot Note] </div> <p>*Particles excluded from dating</p> <p>**E.S.: External Surface</p> <p>Ns: Number of counted fission tracks </p> <p>ρs: Spontaneous fission track density</p> <div>N_u-sp: Number of area-corrected 238U counts on unknown sample</div> <div>ρ_u-sp: Density of area-corrected 238U counts on unknown sample</div> <div>N_u-std : Total count of 238U on Uranium Standard sample</div> <div>ρ_u-std: Density of 238U counts on Uranium Standard sample</div> <div>P (χ²) : probability of obtaining the χ² value for ν degrees of freedom (ν = number or crystals - 1) </div> <div>Zeta value for fission track age calibration : 43.9 ± 1.4 (yr・cm^-2)</div> <div>age: t = (1/λ_D)・ln [1+λ_D・ζ・(Ns /Nu-sp)・ρu-std ]</div> <div>error: σt = t×[1/ΣNs + 1/ΣNu-sp + 1/ ΣNu-std +(σζ/ζ)²]^1/2</div> <div>total decay constant of ²³⁸U: λ_D = 1.55125×10^-10 yr^-1</div>