Study of coprolites from the Araripe sedimentary basin through FT-IR spectroscopy and x-ray diffraction

Química Nova

Universidade Federal do Maranhão, Imperatriz, Brasil¹  Universidade Regional do Cariri, Crato, Brasil¹  Nobre, Marcos Augusto de Lima¹  Universidade Estadual Paulista, Presidente Prudente, Brasil¹  Freire, Paulo de Tarso Cavalcante¹  Lima, Ricardo Jorge Cruz¹  Sasaki, José Marcos¹  Lanfredi, Silvania¹  Saraiva, Antonio Álamo Feitosa¹  Universidade Federal do Ceará, Fortaleza, Brasil¹ 

关键词: coprolites;    X-ray diffraction;    Fourier transform infrared spectroscopy.;   

DOI  :  10.1590/S0100-40422007000800029

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Coprolites are fossilized faeces that constitute an important source of palaeobiological informations. This paper describes the characterization of some coprolite materials originated from the Romualdo Member of the Santana Formation (Araripe Basin, south of Ceará State in Brazil) by means of two techniques: X-ray powder diffraction and Fourier transform infrared spectroscopy (FT-IR). This characterization allowed us to determine the main composition of the coprolites, of the nodulus (where the coprolites were extracted) and of the sediment (where the nodulus was found) suggesting that the material was produced by a carnivorous fish of the Lower Cretaceous.

【 授权许可】

Unknown