1:45 PM - 3:15 PM
[O08-P02] The Type and Protolith of the Xenoliths in the
Tonalite in the Otakisawa Mountain Stream of the Tanzawa Mountains
Keywords:tonalite, xenolith, Tanzawa mountain
Tonalite containing xenolith are found along the coast of
Sagami Bay, and these tonalite are from the Tanzawa mountain. By observing these tonalite
and their xenolith, it appeared that they contained more than one type of
xenolith, based on the differences in color and mineral size. The
question is what rock each xenolith was derived from and from which body
of rock. In this study, a survey was conducted in Otakisawa, where
the xenolith are particularly prominent. The purpose of this
study is to estimate the type and source rock of the xenolith in the Otakizawa tonalite in
the Tanzawa mountain.
The XRF results from Experiment 2 (Figure 6) show that the
xenolith at Sites B and E both have SiO2 values in the 53% range, which
are close in value and larger than the xenolith at Site A. Therefore, at
least the xenolith at sites B and E are considered to be of the same type.
Therefore, there is at least one type of xenolith. Since the
xenolith at sites A, B, and E all have values close to the main chemical
composition of hornblende (from [5]), the xenolith at Otakizawa is
hornblende.
And the source rock of the hornblende is mafic rock. In other words, at least
one type of xenolith is present in the Otakisawa tonalite, and the
xenolith in the Otakisawa tonalite is hornblende, and the source rock is
mafic rock.
Sagami Bay, and these tonalite are from the Tanzawa mountain. By observing these tonalite
and their xenolith, it appeared that they contained more than one type of
xenolith, based on the differences in color and mineral size. The
question is what rock each xenolith was derived from and from which body
of rock. In this study, a survey was conducted in Otakisawa, where
the xenolith are particularly prominent. The purpose of this
study is to estimate the type and source rock of the xenolith in the Otakizawa tonalite in
the Tanzawa mountain.
The XRF results from Experiment 2 (Figure 6) show that the
xenolith at Sites B and E both have SiO2 values in the 53% range, which
are close in value and larger than the xenolith at Site A. Therefore, at
least the xenolith at sites B and E are considered to be of the same type.
Therefore, there is at least one type of xenolith. Since the
xenolith at sites A, B, and E all have values close to the main chemical
composition of hornblende (from [5]), the xenolith at Otakizawa is
hornblende.
And the source rock of the hornblende is mafic rock. In other words, at least
one type of xenolith is present in the Otakisawa tonalite, and the
xenolith in the Otakisawa tonalite is hornblende, and the source rock is
mafic rock.