Person:
Martín Chivelet, Javier

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First Name
Javier
Last Name
Martín Chivelet
URI
https://hdl.handle.net/20.500.14352/75277
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Geológicas
Department
Geodinámica, Estratigrafía y Paleontología
Area
Estratigrafía
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2007 - 200912010 - 20141
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Author: Ortega Martínez, Ana Isabel × Subject: 550.4 ×

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Now showing 1 - 2 of 2
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    Trace Elements in Speleothems as Indicators of Past Climate and Karst Hydrochemistry: A Case Study from Kaite Cave (N Spain
    (Hydrogeological and Environmental Investigations in Karst Systems, 2014) Cruz, Juncal.A.; Martín Chivelet, Javier; Marín Roldán, A.; Turrero, M.J.; Edwards, R.L; Ortega Martínez, Ana Isabel; Cáceres, J.O.
    A stalagmite that grew during the Holocene (between 4.9 and 0.9 ka BP) in Kaite Cave (Ojo Guareña Karst Complex, Burgos, N Spain) has been analyzed by Laser-Induced Breakdown Spectroscopy (LIBS) with the aim of reconstructing secular variations in the hydrochemistry of the karst system, in turn related to changes in the environment outside the cave. LIBS analyses yield significant changes in Mg/Ca and Sr/Ca intensity ratios through the stalagmite, which reveal consistent trends and patterns at decadal to centennial scales. The origin of the observed changes in Mg/Ca and Sr/Ca ratios is discussed in the framework of the cave system and the regional climatic variability, particularly the changes in precipitation.
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    Geochemical evolution of drip-water and present-growing calcite at Kaite cave (N Spain)
    (2007) Turrero Jiménez, María Jesús; Garralón Lafuente, Antonio; Gómez González, Paloma; Sánchez Moreno, Lorenzo; Martín Chivelet, Javier; Ortega Martínez, Ana Isabel; Bullen, Thomas D.; Wang, Yanxin
    A range of parameters is analyzed from drip-waters and present-growing calcites at Kaite cave (Ojo Guareña complex, Burgos, N Spain) from mid-2002. The objective is establishing the linkage between the geochemical processes occurring in the drip-water/calcite system and the changes external to the cave. The selected site is Las Velas Hall, characterized by a stable cave climate and absence of significant air currents. Two seepage points (with “low” and “fast” drip-water rate) were chosen for the study, both with calcite growing at present time. The low drip-water point does not have a direct response to rainfall, as opposite to the fast drip-water point which respond rapidly to external precipitation. Intra- and inter- annual variations in the chemical and isotopic components are observed.