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Journal of the Speleological Society of Japan


Volume 13

Shun-ichi UENO
Parapatric Occurrence of Anophthalmic Trechiama (Coleoptera, Trechinae) in Central Japan
Parapatric occurrence of three different lineages of anophthalmic trechine beetles bclonging to the group of Trechiama ohshimai is recorded on the Etsumi and the lbuki Mountains on the borders of Fukui, Gifu and Shiga Prefectures in Central Japan. Three new species. T. dispar, T. iwasakii and T. etsumianus, are described. the first belonging to the nagahinis complex, the second to the suzukaensis comp]ex and the third to the ohshimai complex. Besides, a new species, T. cognatus, is described from a mine adit because of its close affinity to T. etsumianus.
A New Euryparasitus (Acarina, Gamasida, Rhodacaridae) Collected from Mine Adits of Japan
  A new species of the genus Euryparasitus belonging to the gamasid family Rhodacaridae is described from Japan under the name of E. pagumae. It was collected from nests of the masked palm-civet in mine adits. This genus is recorded for the first time from Japan.
Naruhiko KASHIMA
Geochemistry of the Spelean and Insular Phosphates from Japan : Variscite and Vashegyite
For the mineralogical and geochemical characterization of variscite and vashegyite from caves and insular environments in Japan, four specimens were analyzed by using XRD, XRF, SEM with EDX and SIEMS. The major elements and trace-elements as Nb, Zr, Y, Sr, Rb, Pb. Zn, Cu, Ni, Co, Cr, Ba, V, S and Ga were determined. There is a high possibility that the data of trace-elements reflect different types of geochemical environments.
Tetsuo MINAKAWA, Sachio INABA and Naruhiko KASHIMA
Crandallite from Funakoshi Limestone Cave, Mie Prefecture, Japan

Crandallite occurs as white aggregates of trigonal or rhombohedral crystals up to 15É m in size with vitreous luster, or rosettes of thin lamellae, in wall crust of clay associated with hydroxyapatite in Funakoshi limestone cave, Mie Prefecture. This is the first finding of the mineral in a limestone cave of Japan.

 XRD powder data identify Funakoshi crandallite as hexagonal type. Micro-prove analysis (semiquantitative determination) gives trigonal crystal (P2O5 29.85, Al2O3 34.97, CaO 9.98, SrO 0.06wt%, SO3 trace) and rhombohedral crystal (P2O5 29.67, Al2O3 33.61, CaO 9.70, SrO 0.01 wt%, SO3 trace), Ieading to the experimental formula (O= l0.5) (Ca0.83, Sr0.01)É0.84Al3.14P1.95O10.5 (trigonal), (Ca0.83, Sr0.00)É0.83Al3.14P1.95O10.5 (rhombohedral). Thus, Funakoshi crandallite seems to be nearly pure endmember-CaAl3(PO4)2(OH)5ÅEH2O.
Hayao MORINAGA, Haruko MURAYAMA, Ikuko HORIE, Yu Yan LIu, Katsumi YASKAWA and Tadashi KURAMOTO
Age Detemination of Collapse in Limestone Caves by Comparison of Paleomagnetic Records in Stalagmite with a Paleomagnetic Secular Variation Curve -An Example of Yurino-no-ana Cave-
In several limestone caves, there are many collapsed base rocks and speleothems. An age of collapse was determined through a paleomagnetic analysis of a collapsed flowstone and a stalagmite growing up on the flowstone, which were collected from Yurino-no-ana Cave, Akiyoshi, Japan. The stalagmite seems to have recorded the geomagnetic field variation after collapse, because the stalagmite and the flowstone respectively have quite different paleomagnetic records. Based on comparison of the paleomagnetic records of the stalagmite with a paleomagnetic secular variation curve obtained from a Yogo Lake sediment core, the age of the lowest part for the stalagmite was estimated at about 4,500 years BP. It was concluded that the collapse had happened till 4,500 years BP. The collapse may have occurred due to a catastrophic event (e.g., an earthquake activity).
Luis S. QUINDOS, Pedro L. FERNANDEZ, Jesus SOTO, Eugenio VILLAR and Toshikatsu MIKI
Evolution of the Radon Concentration in Altamira Cave
Concentration of atmospheric radon was measured in Altamira Cave, Spain, having been closed to public since 1977 for preservation of ancient paintings. The radon activity strongly depends on the ventilation flow rate in the cave, and agrees with theoretical one calculated with a two-cylinder model for radon behavior in caves. The correction factor of the radon exhalation rate, which was introduced to compensate for the roughness of cave walls, is important at low ventilation rates, but becomes insignificant at higher flow rates than 0.1 m/s.