The systematical14C age of a large gagatite, which has been found in the purniceous airfall deposits of the last large eruption of Changhaishan-Tianchi volcano, is dated from its centre to its edge. By fitting the14C ...The systematical14C age of a large gagatite, which has been found in the purniceous airfall deposits of the last large eruption of Changhaishan-Tianchi volcano, is dated from its centre to its edge. By fitting the14C age with the high precise calibrated curve of tree ring, it IS concluded that t h r date of the last large eruption is (1215±15) AD. In addition, the climatic effects of that large eruption are also discussed. pointing out that the last large eruption probably corresponds to the sulfuric acid peak at (1227 ± 2) AD in GISP2 Greenland ice core.展开更多
文摘The systematical14C age of a large gagatite, which has been found in the purniceous airfall deposits of the last large eruption of Changhaishan-Tianchi volcano, is dated from its centre to its edge. By fitting the14C age with the high precise calibrated curve of tree ring, it IS concluded that t h r date of the last large eruption is (1215±15) AD. In addition, the climatic effects of that large eruption are also discussed. pointing out that the last large eruption probably corresponds to the sulfuric acid peak at (1227 ± 2) AD in GISP2 Greenland ice core.
