On the origin of fiber calcite crystals in moonmilk deposits

被引:125
作者
Cañaveras, JC
Cuezva, S
Sanchez-Moral, S
Lario, J
Laiz, L
Gonzalez, JM
Saiz-Jimenez, C [1 ]
机构
[1] CSIC, Inst Recursos Nat & Agrobiol, Seville, Spain
[2] Univ Alicante, CSIC UA, Dept Ciencias Tierra, Alicante, Spain
[3] CSIC, Museo Nacl Ciencias Nat, Dept Geol, Madrid, Spain
[4] Univ Castilla La Mancha, Fac Ciencias Medio Ambiente, Toledo, Spain
关键词
D O I
10.1007/s00114-005-0052-3
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
In this study, we show that moonmilk subaerial speleothems in Altamira Cave (Spain) consist of a network of fiber calcite crystals and active microbial structures. In Altamira moonmilks, the study of the typology and distribution of fiber crystals, extracellular polymeric substances, and microorganisms allowed us to define the initial stages of fiber crystal formation in recent samples as well as the variations in the microstructural arrangement in more evolved stages. Thus, we have been able to show the existence of a relationship among the different types of fiber crystals and their origins. This allowed us to outline a model that illustrates the different stages of formation of the moonmilk, developed on different substrata, concluding that microbes influence physicochemical precipitation, resulting in a variety of fiber crystal morphologies and sizes.
引用
收藏
页码:27 / 32
页数:6
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