关于广东有无冰川发育条件的讨论  

The Discussion on the Condition for Glacier Whether Developed in Guangdong

作　　者：刘尚仁[1] 覃朝锋[1] 彭华 

机构地区：[1]中山大学地球与环境科学学院,广东广州510275

出　　处：《地理科学》2000年第4期375-380,共6页Scientia Geographica Sinica

摘　　要：因为“冰臼”一词尚未得到地学界认可 ,建议继续用“冰川壶穴”来替代“冰臼”。由于生成冰臼 (冰川壶穴 )与壶穴的水动力条件和地貌形态相似 ,所以单从形态难以区分广东河床上的壶穴或冰臼 ,只有确定广东是否发育过第四纪冰川之后 ,才可能确定广东是否有冰臼。本文从气候、地貌和生物角度证实广东未出现过第四纪冰川环境 ,并认为所谓 :①水应力集中一点生成冰臼 ;②花岗岩坚硬不能生成壶穴 ;③二、三百万年前生成冰臼等冰臼论观点是不成立的。After tens dictionaries of Chinese and Chinese foreign language are looked up, there is not nearly the “bingjiu' Its English is moulin or glacial pothole. term in it, it is reflected that the term is still not approved by most geonomist, to substitute “bingchuan huxue' ① for “bingjiu' continually is proposed. Owing to waterpower condition and geomorphologic shape growing moulin and pothole are similar, so from form only distinguishing the pothole or moulin on the riverbed are difficult, only if fixing there is glacier in Guangdong, the moulin can just be fixed in Guangdong. It is confirmed that environment of Quaternary glacier in Guangdong appeared not from following angles of climate, landform and organisms etc.: Inferred annual mean temperature was higher than 6℃ in glacial epoch at the highest peak Shikengkong its elevation was 1902m in Guangdong, the coldest annual mean temperature was 13℃± in the glacial epoch inferred by sporopollen data in Jiexi and Fengshun; there is not the glacial landform in the middle low mountains of Guangdong and there is not the document report on established palaeo glacier remains; the plant fossil in Early Pleistocene Zhanjiang Fm. is Bauhinia Diospyros Myrica phyllites Rhus combination, today there are still a large number relict flora. The following moulin theory on mechanism for the formation and conservation of moulin is untenable: (1) moulin grows where water stress concentrates at a point; (2) pothole can not grows on the river bed of granite and sandstone bedrock; (3) moulin grew before (200-300)×10 4a and can be conserved so far

关 键 词：冰川壶穴 广东 早更新世 冰川环境证据 地貌 

分 类 号：P931.4[天文地球—自然地理学]