“黄山冰碛层”孢粉分析及古气候探讨

A DISCUSSION ON THE POLLEN ANALYS IS AND PALAEOCL IMATE OF HUANGSHAN MORAINE

黄山地区是否存在第四纪冰川,对我国以至整个东亚第四纪古气侯的演变有着重大意义.笔者在黄山考察中,进行了实地观察和孢粉分析。乌泥关“绛色泥砾”为 Pinus—Pterocarya—Quercus—Chenopodiaceae 孢粉组合带。反映了温暖的针阔叶混交林;白亭“红色泥砾”为 Keteleeria—Quercus—Rhus.形成亚热带含常绿树落叶林—针阔叶林;消遥溪“黄色泥砾”为 Pinus—Quercus—Chenopodiaceae—Gramineae—Artemisia,反映了干凉的疏林草原型气候。形成上述“冰碛层”时的古气侯接近或略低于现今该区气温。倘若形成古冰川则降水、气温条件不足。

In matters of the Quaternary palaeoclimate evolution in China and East Asia,it is significant to make a confirmation whether the Quaternary glaciers existed in Huangshan region. Based on the spot observation and the pollen analysis,it is concluded (1)The Wuniguan“deep red boulder clay”is Pinus—Pterocarya—Quercus Chenopodiaceae pollon composite zone,which represents the warm mixed forest of coniferous and broadleaf tree. (2)The Baiting“red boulder clay”contains Keteleeria—Quercus—Rhus, in which the evergreen forest deciduous and coniferous—broadleaf tree are foundappearing as semi—tropical climate. (3)The Xiaoyaoxi“yellow boulder clay”contains Pinus—Quercus— Chen opodiaceae—Gramineae—Artemisia.It represents the dry and cold forest thinning—grass land type climate. The temperature of the palaeoclimate mentioned above,so to speak, approaches or is slightly lower than the existing one.Tne precipitation and temperature conditions are not goot enough to form the palaeoglaciers.