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中文摘要：
通过对秦岭主峰太白山野外实地考察,明确海拔3000m以上发育有：石海、石河与石流坡、石冰川与地下暗河、倒石堆与岩屑堆、冰缘岩柱与石堡、雪蚀洼地及石环等典型冰缘地貌,并发现发育有冰缘黄土层存在。从各冰缘砾石组构看,砾石粒径大小不一,堆积混杂无序,砾石AB面倾向东南方向,除石冰川外,砾石AB面倾角值远大于坡面坡度,说明堆积不稳定。通过山体发育环境因素分析,发现因构造、岩性、坡向与山体高度的冰缘地貌存在差异,表现为冻融风化作用下的砾石组合地貌广泛发育,其中山体南坡石海、石冰川与地下暗河、倒石堆与岩屑堆大量典型发育,北坡冰缘岩柱与石堡、石河与石流坡发育典型,同时这也为形成山地灾害提供了条件基础,建议应人为加强干预,尽早制定合理措施。
英文摘要：
Based on the field survey for the alpine zone of Taibai Peak of Qinling Mountain （ Taibai Mountain） , it was confirmed that above the altitude of 3000m, there are the typical periglacial geomorphology such as stone field, stone river and rock stream, block glacier and underground river, talus and periglacial tot, fort - shaped rocks, nivation hollow and stone - circles. The periglacial loess was firstly found. The fabrics of the periglacial gravels revealed that gravels are nonuniform in size and chaotic melange. AB loft beyond block glacier is much greater than slope gradient, which shows the accumulation is unstable. The analysis of the control factors and rock fabric indicated that due to the differences of the landforms, lithology, slope and mountain height, it resul- ted in a significant diversity of periglacial geomorphology on distribution, types, landscape features and fabric characteristics, reflecting an unique environment of Qinling Mountain. It means the mountain disasters happen easily. So the reasonable prevention measures should be planed.
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Climate change since 11.5 ka on the Diancang and Gongwang Mountains, southeastern margin of the Tibe
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