摘要
During the Early Triassic,harsh environmental conditions delayed the biotic recovery after the end-Permian life crisis,which is generally related to the massive eruptive event of the Siberian traps.The scarcity of the fossil record in many areas of the Earth following this global crisis has been mainly attributed to arid and acid palaeoenvironmental conditions.In the Iberian Peninsula,extensive aeolian and braided fluvial paleoenvironments have been identified,and the presence of secondary minerals,such as kaolinite and aluminium-phosphate-sulfate(APS),has been associated with acid meteoric waters.On Mars,many of these features,such as aeolian facies and minerals like jarosite or hematite,related to acid ground water alteration products,have been previously described on Meridiani Planum.During the Late Noachian,the possible occurrence of liquid water and warm conditions have been reported,being one of the most favourable periods for life development on Mars.However,an increase in aridity and acidity during the Late Noachian–Early Hesperian(probably related to the Tharsis volcanism),together with the internal switches that could have provoked inefficient water recycling,may have hampered the appearance and/or development of favourable habitability conditions on this planet.Therefore,the comparison of extreme palaeoenvironmental conditions of the Early Triassic on Earth with data from Meridiani Planum can sheds some light on the study of habitability on ancient Mars.
基金
supported by projects CGL2011-24048 and CGL2014-52699P of the Spanish Ministry of Economy
CSIC Research Group:Sistemas Sedimentarios y Variabilidad Climática(642853)
UCMBSCH-GR58/08 Projects:Análisis de Cuencas(910429)and Paleoclimas(910198)。
