浙江杭州萧山跨湖桥遗址发掘中的一些地学问题研究  

Some geoscience problems in the exhumation of the cross-lake bridge site at Xiaoshan of Hangzhou, Zhejiang Province

作　　者：梁河 冯宝英[2] 胡艳华 毛汉川 

机构地区：[1]浙江省地质调查院,浙江杭州311203 [2]浙江省文物考古研究所,浙江杭州310014

出　　处：《中国地质》2011年第2期504-515,共12页Geology in China

基　　金：中国地质调查局地质大调查项目(12120100511103)资助

摘　　要：本文采用高分辨率层序地层学理论,运用气候旋回、基准面升降旋回,以及海平面升降旋回在区域上等时的原理,对研究区46 km2中的23个钻孔及两条全新世剖面进行了高精度的对比研究及沉积环境分析,对跨湖桥人的生态环境进行了深入的研究,得出8000 aBP跨湖桥人生活的地貌环境、植被、动物、气候已与现今基本一致,跨湖桥人突然"消失",是由于海平面上升,遗址被淹而致。直至3000 aBP海水还未从本区退出,所以先人不可能迁回,从而显示出某种"神密"色彩。Based on the high resolution stratigraphic sequence stratigraphy theory and the principles applicable to conditions as to when climate cycle and ascending and descending cycles of the base level and sea level are over the whole region,this paper carried out a comparative study with high precision and sedimentary environment analysis of 23 drill holes and 2 holocene sections within 46 km2 of the region of interest,and also made an in-depth investigation of the ecological environment for the ancestors living at the cross-lake bridge.The results show that the ancestors at 8000aBP cross-lake bridge lived in an environment almost identical with the current one in terms of its land features,vegetations,animals and climate,and the reason why the ancestors at the cross-lake bridge ＂disappeared＂ all of a sudden was that the ascent of the sea level caused the submergence of its site.The sea water didn’t withdraw until 3000aBP,so it was unlikely for the ancestors to move back,which has left the later generations an impression of ＂mystery＂.

关 键 词：跨湖桥遗址 高分辨率对比 气候旋回 沉积环境 古生态环境 

分 类 号：P539.2[天文地球—古生物学与地层学]