本文選題：大荔人　切入點：洛河　出處：《地理學(xué)報》2016年05期 　論文類型：期刊論文

【摘要】：目前對含大荔人化石的地層年代認(rèn)識仍存很大爭議。采用黃土—古土壤序列定年法廣泛調(diào)查渭河盆地東北部區(qū)域和大荔人化石點附近洛河上下游河段過去的河湖環(huán)境演變歷史;在此基礎(chǔ)上,結(jié)合產(chǎn)出大荔人化石的地貌沉積體特征,分析其形成時所處的區(qū)域演化階段及其中含化石的沉積層位堆積年代。結(jié)果顯示,區(qū)域曾在S14、L9、L6、S2、L2和L1SS發(fā)育或堆積時期發(fā)生過數(shù)次古湖湖退或河流下切;含大荔人化石的沉積層是在區(qū)域發(fā)生于L6晚期的一次湖退后,洛河于出露至氣下的古湖湖底上堆積而成的,其堆積時代與S5古土壤發(fā)育時代相當(dāng),平均年齡約0.55 Ma BP。由該研究結(jié)果推論,學(xué)界對北京猿人年齡估計的老的年齡框架可能偏年輕。
[Abstract]:At present, the stratigraphic chronology of the fossils containing Dali people is still very controversial. The loess paleosol sequence dating method is widely used to investigate the evolution history of the river and lake environment in the northeast region of the Weihe basin and the upper and lower reaches of the Luohe River near the Dali fossil site. On this basis, combined with the geomorphological sedimentary body characteristics of the fossils produced in Dali, the authors analyzed the regional evolution stage in which the fossils were formed and the age of deposition of the fossilized deposits. The results show that, During the development or accumulation of S14, L9, L6, S2, L2, and L1SS, the ancient lake retreated or cut down several times, and the sediments containing the Dali fossils were deposited on the back of a lake in the late L6 region, and the Luohe was deposited on the bottom of an ancient lake exposed to air. The age of accumulation is about the same as that of S5 paleosol, with an average age of about 0.55 Ma BP.The results of this study suggest that the old age frame estimated by academic circles for Peking ape-man may be relatively young.
【作者單位】： 上海師范大學(xué)旅游學(xué)院地理系;
【基金】：國家自然科學(xué)基金項目(41371021)~~
【分類號】：Q981

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