小脚"(StW 573,来自南非 Sterkfontein 的 Australopithecus prometheus)的生物年代学日期为 360 万年。

IF 4.6 2区 社会学 Q1 ANTHROPOLOGY
Francis Thackeray
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引用次数: 0

摘要

关于南非上新世-更新世洞穴沉积中被认为是非洲澳洲人和南方澳洲人化石的地质年龄,已经形成了争论。对于 Sterkfontein 洞穴(第 2 和第 4 个成员),宇宙成因核素等时线(10Be/26Al)测定法得出的年龄估计为距今 340 万至 370 万年(Ma)。然而,利用非人灵长类的生物年代学方法表明,另一个年龄范围在 2 至 2.6 Ma 之间。Thackeray 和 Dykes 根据一种新的类人猿生物年代学方法,认为 Sterkfontein 第 4 号成员的平均年龄为 2.76 Ma,年龄范围较宽(约 2.0-3.5 Ma)。在本研究中,对来自第 2 组分、被昵称为 "小脚 "的斯特克方丹头骨和骨骼(StW 573)进行了重新评估。应用回归模型对其年龄进行了估计,得出的假定年代为 3.6 Ma,与现有的宇宙成因年代相比较,其结果较为理想。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A biochronological date of 3.6 million years for “Little Foot” (StW 573, Australopithecus prometheus from Sterkfontein, South Africa)

A biochronological date of 3.6 million years for “Little Foot” (StW 573, Australopithecus prometheus from Sterkfontein, South Africa)

A debate has developed with regard to geological ages of hominin fossils attributed to Australopithecus africanus and Australopithecus prometheus in South African Plio-Pleistocene cave deposits. For the Sterkfontein caves (Members 2 and 4), cosmogenic nuclide isochron (10Be/26Al) dating has yielded age estimates ranging from 3.4 to 3.7 million years ago (Ma). However, biochronological approaches using nonhominin primates suggest an alternative age range between 2 and 2.6 Ma. Based on a new method of hominin biochronology, Thackeray and Dykes have recognized that Sterkfontein Member 4 has a mean age of 2.76 Ma associated with a wide range (circa 2.0–3.5 Ma). In this study, the Sterkfontein skull and skeleton (StW 573), nicknamed “Little Foot” from Member 2 and attributed to A. prometheus, is reassessed. A regression model applied to estimate its age provides a hypothesized date of 3.6 Ma, which compares favorably with the existing cosmogenic dates.

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来源期刊
CiteScore
7.00
自引率
5.40%
发文量
46
期刊介绍: Evolutionary Anthropology is an authoritative review journal that focuses on issues of current interest in biological anthropology, paleoanthropology, archaeology, functional morphology, social biology, and bone biology — including dentition and osteology — as well as human biology, genetics, and ecology. In addition to lively, well-illustrated articles reviewing contemporary research efforts, this journal also publishes general news of relevant developments in the scientific, social, or political arenas. Reviews of noteworthy new books are also included, as are letters to the editor and listings of various conferences. The journal provides a valuable source of current information for classroom teaching and research activities in evolutionary anthropology.
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