气候变化领域集成服务门户(CCPortal): Diagenetic changes on bone histology of Quaternary mammals from a tropical cave deposit in southeastern Brazil

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DOI	10.1016/j.palaeo.2019.109372
	Diagenetic changes on bone histology of Quaternary mammals from a tropical cave deposit in southeastern Brazil
	Mayer E.L.; Hubbe A.; Botha-Brink J.; Ribeiro A.M.; Haddad-Martim P.M.; Neves W.
发表日期	2020
ISSN	0031-0182
卷号	537
英文摘要	Karst caves are suitable environments for the accumulation and preservation of fossils. Cave deposits are often complex and the environmental conditions within cave sites result from intricate interactions between various biological, physical and chemical factors. However, it is not fully understood how the complexity of the environmental conditions of caves influences bone diagenesis. The study of the initial stages of bone diagenesis depends to a large extent on understanding the changes in the bone histology. To contribute to this issue, we examine a set of postmortem changes affecting the bone histology of Quaternary mammals that accumulated naturally in Locus 2, a pitfall site in Cuvieri Cave, located in the tropical region of Brazil. Our analyses show that bones deposited in caves may be subject to a peculiar set of environmental conditions that in tropical regions may prevent the preservation of bone histological structure. The effect of diagenetic processes on the bones differs depending on the taphonomic stage of the bone and the diagenetic alterations appear to have influenced each other. The deposition of bioclasts following the entrapment of individuals in Locus 2 favours the proliferation of bacteria on bones and appears to be important in directing the diagenetic alteration. The hydrological regime of the cave, that is recharge with potential phases of higher humidity, also is important in directing the diagenetic alteration and further decreased the preservation potential of the bone microstructure. The formation of macroscopic and microscopic cracks related to bone weathering in caves shows that the taphonomic processes peculiar to these environments are poorly understood, highlighting the need for more research to be conducted on cave taphonomy. © 2019 Elsevier B.V.
英文关键词	Bone preservation; Cervidae; Diagenesis; Karst; Microstructure; Tayassuidae
语种	英语
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150742
作者单位	Instituto de Estudos do Xingu, Rua Constantino Ferreira Viana, Quadra 8, Centro, São Félix do Xingu, PA 68380-000, Brazil; Programa de Pós-Graduação em Geociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS 91501-970, Brazil; Departamento de Oceanografia, Instituto de Geociências, Universidade Federal da Bahia, Salvador, BA 40170-020, Brazil; Instituto Do Carste. Rua Barcelona, 240/302, Belo Horizonte, MG 30360-260, Brazil; Karoo Palaeontology, National Museum, Box 266, Bloemfontein, 9300, South Africa; Department of Zoology and Entomology, University of the Free State, Bloemfontein, 9300, South Africa; Seção de Paleontologia, Museu de Ciências Naturais, Fundação Zoobotânica Do Rio Grande Do Sul, Av. Salvador França, 1427, Porto Alegre, RS 90690-000, Brazil; Instituto de Geociências, Universidade Estadual de Campinas, Campinas, SP 13083-855, Brazil; Instituto de Estudos Avançados da Universidade de São Paulo, Rua da Praça Do Relógio, 109, São Paulo, SP 05...
推荐引用方式 GB/T 7714	Mayer E.L.,Hubbe A.,Botha-Brink J.,et al. Diagenetic changes on bone histology of Quaternary mammals from a tropical cave deposit in southeastern Brazil[J],2020,537.
APA	Mayer E.L.,Hubbe A.,Botha-Brink J.,Ribeiro A.M.,Haddad-Martim P.M.,&Neves W..(2020).Diagenetic changes on bone histology of Quaternary mammals from a tropical cave deposit in southeastern Brazil.Palaeogeography, Palaeoclimatology, Palaeoecology,537.
MLA	Mayer E.L.,et al."Diagenetic changes on bone histology of Quaternary mammals from a tropical cave deposit in southeastern Brazil".Palaeogeography, Palaeoclimatology, Palaeoecology 537(2020).