Presentation Information
[O07-P31]Proposal of an index for estimating the distance from the source rock
*Ayaka Mitsui1, *Reiji Iwamoto1, *Keishi Okumi1, *Mayu Naito1, *Yamato Yasuhara1, *Natsuki Yamamoto1, *Naoko Kodama1, *Akito Sasaki1, *Akira Tada1, *Takuto Nakanou1, *Tomohiko Maeda1, *Yuya Muromoto1, *Ryusei Moriyama1 (1.Hyogo Prefectural Himejihigashi Senior High School)
Keywords:
Ibo River,FU value,volume ratio of quartz / feldspar,source rock
The volume ratio of quartz / feldspar was calculated from the quartz and feldspar of the Ibo River flowing in the southwestern part of Hyogo prefecture.
In the Ibo River basin, the average grain sizes of quartz and feldspar are almost the same. The FU value of quartz does not change much, but the FU value of feldspar increases downstream because feldspar melts very quickly. The volume ratio y of quartz / feldspar to the distance x from the source rock is indicated by an approximate straight line of y = 0.024x + 0.58. These show that the distance from the source rock can be estimated mathematically. Everyone intuitively knows that the particles are rounder and the quartz / feldspar is larger toward the downstream, but this study showed that it can be expressed by an equation for the first time.
In the Ibo River basin, the average grain sizes of quartz and feldspar are almost the same. The FU value of quartz does not change much, but the FU value of feldspar increases downstream because feldspar melts very quickly. The volume ratio y of quartz / feldspar to the distance x from the source rock is indicated by an approximate straight line of y = 0.024x + 0.58. These show that the distance from the source rock can be estimated mathematically. Everyone intuitively knows that the particles are rounder and the quartz / feldspar is larger toward the downstream, but this study showed that it can be expressed by an equation for the first time.