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Journal of the Speleological Society of Japan


Volume 9

Masataka SATO
A New Cercyon (Coleoptera, Hydrophilidae) Found in a Japanese Cave
  A new Cercyon-species found in the limestone cave Ose-do, Kumamoto Prefecture, Southwest Japan, is described under the name of C. uenoi. It does not seem to be a true troglobiont from the morphological view-point, but may be a troglophile closely associated with bats' guano.
Shun-Ichi UENO
Two New Species and a New Record of the Group of Trechiama oni (Coleoptera, Trechinae)
 Two new trechine beetles belonging to the group of Trechiama oni are described, one from a mine adit and its outside at the northern part of central Shikoku and the other from the upper hypogean zone of the lzumi Hills at the western part of the Kii Peninsula. The former belongs to the satoui complex within the species-group, while the latter is a member of the kosugei complex. Besides, a new locality of Trechiama fujiwaraorum S. UENO is recorded from the vicinity of its type locality.
Atsushi FUJII
Karst Hydrogeology of the West Akiyoshi Plateau, West Japan
  Karst hydrogeology of the West Akiyoshi Plateau is dealt with through the speleological investigations and the fluorescein dye tracings. A contour map of the phreatic surface of the area is tentatively made up. In the northern half of the plateau, the Ofuku-Beppu-dai hydrologic domain, underground water drains largely eastward into the Koto-gawa (river) alluvial lowland. The drainage basin covers a part of the non-limestone terrains around the karst plateau as well as the northern half of the West Akiyoshi Plateau. A stream piracy through the karst flow system under the plateau is clearly found from a dye tracing between two suface streams by which the plateau is hemmed in, east the Koto-gawa and west the Asa-gawa. It is described as a distinct groundwater trench on the hydrologic map. In the southern half of the plateau, the lwanaga-dai hydrologic domain, all the underground water discharges into the lwanaga Polje which is located at the southeastern margin of the West Akiyoshi Plateau and belongs to the Koto-gawa drainage area. The recharge area is all in the karst terrain.
Naruhiko KASHIMA and Moo Song SUH
Hyeobjae Cave System, a Pseudo-calcareous Cave on Jeju Island, South Korea
 This paper provides : I ) a preliminary report on the pseudo-karst phenomena in the Hanrim area, Jeju Island, South Korea ; 2) an overview of the types of the speleothems that exist in pseudo-calcareous cave, Hyeobjae Cave, which is designated as the Natural Monument No. 236 in South Korea. Jeju Island is almost wholly composed of alkaline basalt flows which form the volcanic cone of Mt. Halla (1,950 m in height) of Quaternary age. Hyeobjae cave system lies in Hyeobjae-ri, Hanrim-eub, about 30 km WSW from the City of Jeju. Microcoquina sand dune is widely distributed in the Hanrim area, overlying the cavernous Pyoseonri Basalt. The desert hollow on the microcoquina sand dune seems to have acted in promoting the growth of carbonate speleothems in Hyeobjae cave system overlaid by lava mound formed by lavapilz and artificial breaksand stone wall. Hyeobjae cave system contains a variety of carbonate speleothems, among which are dripstones (soda-straws, stalactites, stalaymites and columns), flowstones (rims, Iime-laminations, tiers, bacon-like sheets and draperies), accretions (oolites, pisolites, axiolites, tabulites and cave pearls) and other speleothems (cups, cave corals, helictites and conulites). It is concluded that the carbonate minerals in Hyeobjae cave system have been derived from the calcareous microcoquina sands. The carbonate-bearing groundwaters percolated into Hyeobjae cave system and deposited carbonate minerals, which cover bare lava walls and coexist with lava speleothems.
Naruhiko KASHIMA and Teruo IRIE
Recent Gypsum Speleothems from Kometsuka-no-ana Lava Cave, in Aso National Park, Kyushu, Southwest Japan
  Gypsum speleothem, hydrous calcium sulfate CaSO4ÅE2H2O, from a lava cave is reported based on a specimen from Kometsuka-no-ana Cave in Aso National Park, Kyushu. It is formed in response to the evapo-transpirative regium. This is the first report on the occurrence of gypsum as a lava cave speleothem in Japan.
Motoji IKEYA and Toshikatsu MIKI
A Decade of ESR Dating from Speleology at Akiyoshi-do Cave
 Electron spin resonance (ESR), a microwave spectroscopy frst used in speleology for dating stalactites and stalagmites at Akiyoshi-do Cave has become a dating method in geology and archaeology. The principle of ESR dating utilizes trapped electrons and holes or radiation damages that are created by natural radiation from radioactivities in the materials and also from the environment. The total dose of natural radiation (TD) is estimated from the growth curve of ESR signal intensity by artificial irradiation. The ESR age (T) is assessed considering the average annual dose rate (D) of natural radiation. Applications of ESR dating from speleological materials to fossil bones in paleo-anthropology, shells and corals in marine geology and to geological fault movements and geothermal history were developed in these ten years in addition to the recent breakthrough of dating forensic, historical and archaeological organic materials. Progress in ESR dating is reviewed with the emphasis on the recent work in data processing procedures and organic dating with ESR. All the bibliography of ESR dating is compiled for convenience up to the end of 1984.
ESR Dating of Cave Deposits from Akiyoshi-do Cave in Japan and Diabo Cavern in Brazil

  The age and the growth velocities of cave deposits like stalactites, stalagmites and cave pearls at Akiyoshi-do Cave in Japan and at Caverna do Diabo in Brazil have been determined by the method of electron spin resonance (ESR). Technical notes to get a consistent age by avoiding the porous site are discussed.