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Exploration of apatite (U-Th)/He geochronological analysis of volcanic units in fossil-bearing strata of the Homa Peninsula, southwestern Kenya

文献类型：期刊论文

作者Li, Youjuan2; He, Huaiyu1,3; Plummer, Thomas W.4,5; Ditchfield, Peter W.6; Deng, Chenglong1,3; Guo, Zhengtang1,7; Potts, Richard8,9
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2021-10-01
卷号579页码:8
关键词Kanam Formation Abundu Formation Kanjera Formation Apatite (U-Th)/He dating
ISSN号0031-0182
DOI10.1016/j.palaeo.2021.110599
英文摘要Many geological contexts lack suitable material for commonly applied absolute dating methods. Even if some regions contain potentially datable materials, they may be inappropriate for dating by existing geochronological techniques. Paleoanthropological localities on the Homa Peninsula, southwestern Kenya, have yielded important paleoanthropological material. These localities are, however, poorly constrained in time, and few radioisotopic ages have been published, because sediments derived from the Homa Mountain carbonatite complex commonly do not contain zircons for U-Pb dating or feldspars for Ar-40/Ar-39 dating. Additionally, apatite grains that are present have failed to produce precise isotope dilution-thermal ionization mass spectrometer (ID-TIMS) results due to their high common lead content. Apatite (U-Th)/He dating using single-crystal laser fusion He determinations and the U-Th isotope dilution method was applied to three formations with well-constrained ages to test the suitability of this technique for dating sediments on the peninsula. Two of the three Kanam Formation samples provide dates close to the approximately 6 million year age (Ma) provided by Ar-40/Ar-39 dates. The Abundu Formation was dated to 2.39 +/- 0.29 Ma overlapping with the age of the Rawi Formation (C2An.1n Subchron, 3.05-2.59 Ma) to which it has been correlated. The age for the Kanjera South Member 1.54 +/- 0.85 Ma overlaps with the expected 2 Ma age, though it has a large uncertainty. The apatite raw (U-Th)/He ages are somewhat younger than the expected dates, but the technique shows promise.
WOS关键词KANJERA SOUTH ; LATE PLIOCENE ; MOUNTAIN
资助项目Peter Buck Fund for Human Origins Research ; Human Origins Program ; NSF[BCS1327047] ; National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41425013] ; National Natural Science Foundation of China[41621004] ; National Natural Science Foundation of China[41888101] ; Chinese Academy of Sciences[XDB 18030505]
WOS研究方向Physical Geography ; Geology ; Paleontology
语种英语
WOS记录号WOS:000691385900011
出版者ELSEVIER
资助机构Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Human Origins Program ; Human Origins Program ; Human Origins Program ; Human Origins Program ; NSF ; NSF ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Human Origins Program ; Human Origins Program ; Human Origins Program ; Human Origins Program ; NSF ; NSF ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Human Origins Program ; Human Origins Program ; Human Origins Program ; Human Origins Program ; NSF ; NSF ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Peter Buck Fund for Human Origins Research ; Human Origins Program ; Human Origins Program ; Human Origins Program ; Human Origins Program ; NSF ; NSF ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/102657]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者He, Huaiyu
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.China Earthquake Adm, State Key Lab Earthquake Dynam, Inst Geol, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.CUNY Queens Coll, Dept Anthropol, 65-30 Kissena Blvd, Flushing, NY 11367 USA
5.NYCEP, 65-30 Kissena Blvd, Flushing, NY 11367 USA
6.Univ Oxford, Sch Archaeol, Res Lab Archaeol & Hist Art, 1 South Parks Rd, Oxford, England
7.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
8.Natl Museum Nat Hist, Smithsonian Inst, Human Origins Program, Washington, DC 20560 USA
9.Natl Museums Kenya, Dept Earth Sci, POB 40658-00100, Nairobi, Kenya
推荐引用方式
GB/T 7714		 Li, Youjuan,He, Huaiyu,Plummer, Thomas W.,et al. Exploration of apatite (U-Th)/He geochronological analysis of volcanic units in fossil-bearing strata of the Homa Peninsula, southwestern Kenya[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2021,579:8.
APA Li, Youjuan.,He, Huaiyu.,Plummer, Thomas W..,Ditchfield, Peter W..,Deng, Chenglong.,...&Potts, Richard.(2021).Exploration of apatite (U-Th)/He geochronological analysis of volcanic units in fossil-bearing strata of the Homa Peninsula, southwestern Kenya.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,579,8.
MLA Li, Youjuan,et al."Exploration of apatite (U-Th)/He geochronological analysis of volcanic units in fossil-bearing strata of the Homa Peninsula, southwestern Kenya".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 579(2021):8.

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来源：地质与地球物理研究所

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