NDLI: Bioweathering related to groundwater circulation in cavities of magmatic rock massifs

Content Provider	Springer Nature Link
Author	Vidal Romaní, Juan Ramón González López, Laura Vaqueiro, Marcos Sanjurjo Sánchez, Jorge
Copyright Year	2014
Abstract	Runoff flows not only on magmatic rocks massifs surface but also through their internal discontinuities, which define the secondary permeability of the rock. The effects, especially erosive, of the water movement on surface are well known although it is not the same with the effects of water infiltration through the rock. Especially, when it does so at low speed (trickles or seepage) granular disaggregation of the rock is produced at small scale, associated with a specific type of sediment (speleothems) of clast-supported open fabric which is able to store very small volumes of interstitial water, becoming a specific subterraneous microenvironment where some organisms develop their biological cycle totally or partially. Some products derived from the metabolic activity of these organisms incorporated to the infiltration water increase their ability to attack (weathering and dissolution) the rock. This process ends during the dry season when the troglobiont organisms die and the water-transported load, either dragged or in solution (mainly silicon), is sedimented forming the speleothems. The study of these deposits using several techniques, mineralogical, sedimentological, and biological (including metagenomics), indicates an influence of microorganisms on the formation of these deposits; therefore, it is correct to consider them as biospeleothems.
Starting Page	2997
Ending Page	3010
Page Count	14
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	73
Issue Number	6
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-10-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Magmatic rock caves Organic activity Biospeleothems Opal-A Whiskers Druse Micromineral Gypsum Calcite Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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