FN Archimer Export Format
PT J
TI Depositional evolution of an extinct sinter mound from source to outflow, El Tatio, Chile
BT 
AF Wilmeth, Dylan T.
   Nabhan, Sami
   Myers, Kimberly D.
   Slagter, Silvina
   Lalonde, Stefan
   Sansjofre, Pierre
   Homann, Martin
   Konhauser, Kurt O.
   Munoz-Saez, Carolina
   van Zuilen, Mark A.
AS 1:1;2:1;3:1;4:1,2;5:3;6:4;7:5;8:6;9:7;10:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Institut de Physique du Globe de Paris, CNRS-UMR7514, 1 Rue Jussieu, 75005 Paris, France
   Department of Earth and Planetary Sciences, Yale University, New Haven, CT 06511, USA
   Laboratoire Géosciences Océan, Institut Universitaire Européen de la Mer, 29280 Plouzané, France
   Muséum National d'Histoire Naturelle, Sorbonne Université, CNRS UMR 7590, IMPMC, Paris, France
   Department of Earth Sciences, University College London, WC1E 6BT London, United Kingdom
   Department of Earth and Atmospheric Sciences, University of Alberta, T6G 2R3 Edmonton, Alberta, Canada
   Department of Geology and Andean Geothermal Center of Excellence (CEGA), FCFM, Universidad de Chile, Plaza Ercilla 803, Santiago, Chile.
C2 IPGP, FRANCE
   UNIV YALE, USA
   UBO, FRANCE
   MNHN, FRANCE
   UNIV COLL LONDON, UK
   UNIV ALBERTA, CANADA
   UNIV CHILE, CHILE
UM LGO
IF 3.397
TC 13
UR https://archimer.ifremer.fr/doc/00641/75332/75994.pdf
   https://archimer.ifremer.fr/doc/00641/75332/75995.xlsx
LA English
DT Article
DE ;Siliceous sinter;Hot springs;El Tatio;Microbialites;Microfossils
AB Siliceous sinter deposits from El Tatio, Chile, preserve a wide variety of depositional environments and biosignatures, from high-temperature (~85 °C) vent-proximal facies to distal deposits dominated by silicified microbial mats. Four cores were drilled into an El Tatio sinster mound and associated distal apron to investigate changes in hydrothermal environments over geologic timescales. Sedimentary and geochemical analysis of multiple sinter cores records the initiation and accretion of diverse depositional features still observed today in El Tatio. Facies adjacent to hydrothermal vents are dominated by laminated sinter crusts on the steep margins of a high-temperature pool, with sparse microbial preservation. Outer margins of the same pool contain extensive sinter columns up to ten centimeters in length, precipitated during repeated cycles of pool overflow and subsequent evaporation. Low-relief hydrothermal pools also form minor deposits within distal debris aprons, and analogous pools are still active close to sampling locations. Debris aprons are dominated by palisade, tufted, and arborescent microbial fabrics, with distinct mat textures revealing well preserved microfossils. Surficial deposits in all cores feature detrital-rich and microbially-influenced sinters overlying higher-temperature facies, indicating a relative decrease in hydrothermal activity over time. Geochemical proxies for hydrothermal fluids and detrital input match depositional interpretations based on sedimentary structures. 14C ages from core deposits extend the mound's history by 11,000 years, recording at least three thousand years of sinter deposition on top of glacial sandstones (13,337–10,232 y. cal. BP). Importantly, this work provides a detailed depositional model unavailable through surficial sedimentology alone. 
PY 2020
PD AUG
SO Sedimentary Geology
SN 0037-0738
PU Elsevier BV
VL 406
UT 000568162600013
DI 10.1016/j.sedgeo.2020.105726
ID 75332
ER

EF