Who discovered fission track dating
The coincidence of the age of the tektites with the age of geomagnetic polarity reversal (∼ 0.73 Ma) from the Matuyama Epoch to the Brunhes Epoch proposes a plausible explanation that the possible cause of the geomagnetic polarity reversal is due to the big impact of space objects falling onto the earth.The result of the dating also set up a standard for inferring the ages of the deposits in South China as well as in South-East Asia where laterite (red soil) deposits exist in the entire region.
The structure of the layers of deposits in this site was never disturbed, which is the evidence that the stone tools were left behind by the ancient man at the time when the tektites fell on the earth, which were slowly covered over by layers of deposits.TY - JOURT1 - Fission track dating of Carpathian obsidians and provenance identification AU - Bigazzi, G. On this basis "Carpathian" obsidians can be clearly distinguished from their Mediterranean counterparts.Three types of artifacts have been identified: two with sources in the Zemplin Hills and the third with a source in the Tokaj Mountains.Another pseudotachylyte (AT-A'-1) and its wall rock granite contain shortened tracks within zircon grains suggesting partial annealing.The age distribution pattern of the former also contains decomposed age after the normality test (Shapiro-Wilk test) in which the major age yields 52.5 Ma.On this basis "Carpathian" obsidians can be clearly distinguished from their Mediterranean counterparts. PY - 1990Y1 - 1990N2 - Rhyolitic obsidians were sampled from the Tokaj Mountains (Hungary) and the neighbouring Zemplin Hills (Slovakia) for dating by the fission track (FT) method.
Three types of artifacts have been identified: two with sources in the Zemplin Hills and the third with a source in the Tokaj Mountains. The FT ages are found to cluster around 10 and 15 Ma, respectively.
Using the new geochronological data, we can elucidate the cooling history of the Hida granitic rocks, and constrain the timing of the main pulse of pseudotachylyte generation along the Atotsugawa Fault at about 50 Ma.
TY - JOURT1 - Geological framework and fission track dating of pseudotachylyte of the atotsugawa fault, magawa area, central Japan AU - Takagi, Hideo AU - Tsutsui, Kosuke AU - Arai, Hiroyoshi AU - Iwano, Hideki AU - Danhara, Tohru PY - 2013/9Y1 - 2013/9N2 - This paper describes newly discovered pseudotachylyte along the Atotsugawa Fault at the Magawa outcrop, where this fault divides Quaternary deposits in the SW from Triassic Hida granitic rocks to the NE.
A large number of artifacts (stone tools) have been discovered in Baise (Bose), Guangxi, China in recent years.
They show that ancient man were living in the south of China during very ancient times.
AA(Max-Planck-Institut für Kernphysik, Heidelberg, Germany), AB(Analytical Chemistry Division, National Bureau of Standards, Washington, D.