iron ooids
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Minerals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 460
Author(s):  
Marcella Di Bella ◽  
Franco Pirajno ◽  
Giuseppe Sabatino ◽  
Simona Quartieri ◽  
Roberto Barbieri ◽  
...  

High-resolution images of Mars from National Aeronautics and Space Administration (NASA) rovers revealed mm-size loose haematite spherulitic deposits (nicknamed “blueberries”) similar to terrestrial iron-ooids, for which both abiotic and biotic genetic hypotheses have been proposed. Understanding the formation mechanism of these haematite spherules can thus improve our knowledge on the possible geologic evolution and links to life development on Mars. Here, we show that shape, size, fabric and mineralogical composition of the Martian spherules share similarities with corresponding iron spherules currently forming on the Earth over an active submarine hydrothermal system located off Panarea Island (Aeolian Islands, Mediterranean Sea). Hydrothermal fluids associated with volcanic activity enable these terrestrial spheroidal grains to form and grow. The recent exceptional discovery of a still working iron-ooid source on the Earth provides indications that past hydrothermal activity on the Red Planet is a possible scenario to be considered as the cause of formation of these enigmatic iron grains.



2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Marcella Di Bella ◽  
Giuseppe Sabatino ◽  
Simona Quartieri ◽  
Annalisa Ferretti ◽  
Barbara Cavalazzi ◽  
...  


2000 ◽  
Vol 136 (1-2) ◽  
pp. 137-146 ◽  
Author(s):  
U. Sturesson ◽  
J.M. Heikoop ◽  
M.J. Risk
Keyword(s):  


1999 ◽  
Vol 123 (1-2) ◽  
pp. 63-80 ◽  
Author(s):  
Ulf Sturesson ◽  
Andrei Dronov ◽  
Tönis Saadre
Keyword(s):  


Geology ◽  
1996 ◽  
Vol 24 (8) ◽  
pp. 759 ◽  
Author(s):  
Jeffrey M. Heikoop ◽  
Cameron J. Tsujita ◽  
Michael J. Risk ◽  
Tomas Tomascik ◽  
Anmarie J. Mah
Keyword(s):  


GFF ◽  
1994 ◽  
Vol 116 (4) ◽  
pp. 249-253 ◽  
Author(s):  
Ulf Sturesson
Keyword(s):  


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