Modeling of Karstification Processes in Minamidaito Island, Nansei Islands.

对南大东岛的岩溶作用进行了模拟。利用石灰岩片的溶解速率，得到以下结果：现今的岩溶环礁地形形成于约1.6Ma。洞穴沉积物测年结果表明，南大东岛底部盆地洞穴的下降是在100 ka以后开始的。根据洞穴包气积物和钻孔研究结果，末次冰期最低海平面为-100m。因此，人们认为洞穴也是在海拔-100米之前形成的，在同一时期。

Modeling of Karstification in Minamidaito Island was made. Using solution rate of limestone tablets, following results were obtained:Present terrain as karstified atoll has been formed during the age of about 1.6Ma.. Result of the dating speleothems showed that lowering of caves at the bottom basin of Minamidaito Island has begun after the years of 100ka. According to the vadose speleothems and the result of borehole studies, lowest sea level was -100m, in the Last Glacial Period. So, it is considered that caves were formed also until -100m a.s.l., in the same period.