Paleozoic Akiyoshi broken limestone of iron and carbon-bearing quenched veins by impacts on water Earth

Abstract:

As active Earth has been described by the present site after accretionary moved formations through the surface. In fact, the present Japanese Islands have less young volcanic rocks compared with much sedimentary rocks (ca. 60 vol. % ) of the Paleozoic Akiyoshi limestone remained from ocean-floor aggregates and uplifted to form the brecciated plateau in the Miocene at present site of Sea of Japan. The main purpose of the paper is to elucidate the in-situ material evidence of brecciated limestone blocks.

The Akiyoshi underground samples (up to 250m in depth from the Kaerimizu site) drilled by the Akiyoshi Science Museum show significant changes of physical properties of powdered calcite minerals along the fossil reversal distributions [1-4] with anomalous abundances of siderophiles of bulk XRF data analysis at the bottom of 243m in depth[3].

The present in-situ data of FE-ASEM and Raman data show that the deep samples have re- crystallized calcite-halite and rapid veins with iron-carbon grains with shocked nano-carbon [2-4].

To compare with overseas samples, four American Paleozoic samples are investigated in this study of Carlsbad limestone, Sierra Madera Permian limestone, Alamo breccias and Santa-Fe breccias, where the Santa-Fe sample contains shocked quartz and limestone with fluid-tube texture and separated nano-carbon grains in this study [4].

The Akiyoshi limestone formed near at Equator has been remained as shallow impact breccias stored in the interior with Chinese blocks to present site by continental drift process followed by recent impact to be uplifted at the formed site of the Japan islands [4], which might be typical characteristics of active water planet Earth.

 

Reference: [1] Miura Y. (1986): Bull. Akiyoshi-Dai Museum of Natural History (Yamaguchi), 22, 1-22. [3] Miura Y. (1996): Shock-wave Handbook (SV-Tokyo), p.1073-1209. [4] Miura Y. (2014, 2015): Japan G U-2014,2015 (English), each pp.1.