Age Calibration of Hominid-Bearing Sites in Java, Indonesia

印度尼西亚爪哇原始人类遗址的年龄校准

• 批准号: 9405320
• 负责人: Carl Swisher
• 金额: --
• 依托单位: Berkeley Geochronology Center
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-12-15 至 1997-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9405320&HistoricalAwards=false
• 关键词: Age; Calibration; Hominid; Bearing; Sites

9405320 Swisher Available paleontological data indicate that much of our evolutionary history is recorded in rocks on the African continent. An important exception to this, is the origin and evolution of Homo erectus. Numerous specimens of early hominids have been recovered from the Javanese sites of Sangiran, Perning,Kedungbrubus, Sambungmacan, and Ngandong. Considerable debate continues, however, as to the taxonomic affinity and particularly the age of many of these finds. The debate over the age of the Javanese hominids centers around two questions; the precise stratigraphic placemtn of some of the fossil specimens and the precise age of these deposits. This project, by the outstanding geochronology group in the world, will develop a detailed geochronological framework in order to calibrate temporally the evolution of hominids in Java. Current age estaimtes for some finds vary dramatically from slightly over 2 million years ago to as young as 200,000 years ago. They will 1)use incremental laser and resistance furnace heating argon isotope techniques to date pumice-bearing horizons associated with hominid sites in Java, 2) date directly hominids and/or associated mammalian fossils that have sufficient amounts of volcanic material attached for argon isotope dating, and 3) develop and refine the currently available magnetostratigraphies of Plio-Pleistocene hominid-bearing stratigraphic sections of Java. The resultant chronology will permit the construction of a detailed temporal history of Javanese hominids, and allow for the first time, precise temporal correlation of the Javanese Homo erectus with hominid and faunal evets in the Plio-Pleistocene of Africa.

9405320 Swisher可用的古生物学数据表明，我们的许多进化史都记录在非洲大陆的岩石中。一个重要的例外是直立的起源和演变。已经从Sangiran，Perning，Kedungbrubus，Sambungmacan和Ngandong的Javanese遗址中回收了许多早期人类标本。然而，关于分类学亲和力，尤其是其中许多发现的年龄，持续的辩论仍在继续。爪哇人的辩论围绕了两个问题。某些化石标本和这些沉积物的精确年龄的精确地层占地。该项目由世界上杰出的年代学小组组成，将开发一个详细的地质学框架，以便在Java中暂时校准人类的演变。某些人的当前年龄估计发现从略微略有200万年前到200,000年前的年龄差异很大。他们将1）使用递增的激光和电阻炉加热氩同位素技术到迄今为止与Java中的纯种地点相关的带有Pumice bumice bumice的层次Java的含有人类的地层截面。最终的年表将允许构建爪哇人类人类的详细时间历史，并首次允许在非洲的普莱斯宁中，爪哇人同伴与人类和动物evets的精确时间相关。