학술논문
An olivine cumulate outcrop on the floor of Jezero crater, Mars
Document Type
Report
Author
Y. Liu; M. M. Tice; M. E. Schmidt; A. H. Treiman; T. V. Kizovski; J. A. Hurowitz; A. C. Allwood; J. Henneke; D. A. K. Pedersen; S. J. VanBommel; Michael W. M. Jones; A L Knight; B. J. Orenstein; B. C. Clark; W. T. Elam; C. M. Heirwegh; T. Barber; L. W. Beegle; K. Benzerara; S Bernard; O. Beyssac; Tanya Bosak; A. J. Brown; E. L. Cardarelli; D. C. Catling; J. R. Christian; E. A. Cloutis; B. A. Cohen; S. Davidoff; A. G. Fairén; K. A. Farley; D. T. Flannery; A. Galvin; J. P. Grotzinger; S. Gupta; James Hall; C. D. K. Herd; K. Hickman-lewis; R. P. Hodyss; B. H. N. Horgan; J. R. Johnson; John Leif Jørgensen; L. C. Kah; J. N. Maki; L. Mandon; N. Mangold; F. M. McCubbin; S. M. McLennan; K. Moore; M. Nachon; P. Nemere; L. D. Nothdurft; J. I. Núñez; Lauren O'Neil; C. M. Quantin-Nataf; V. Sautter; D. L Shuster; K. L. Siebach; J. I. Simon; K. P. Sinclair; K. M. Stack; A. Steele; J. D. Tarnas; N. J. Tosca; K. Uckert; A. Udry; L. A. Wade; B. P. Weiss; R. C. Wiens; K. H. Williford; M.-P. Zorzano
Source
Science.
Subject
Language
English
ISSN
1095-9203
0036-8075
0036-8075
Abstract
The geological units on the floor of Jezero crater, Mars, are part of a wider regional stratigraphy of olivine-rich rocks, which extends well beyond the crater. We investigate the petrology of olivine and carbonate-bearing rocks of the Séítah formation in the floor of Jezero. Using multispectral images and x-ray fluorescence data, acquired by the Perseverance rover, we performed a petrographic analysis of the Bastide and Brac outcrops within this unit. We find that these outcrops are composed of igneous rock, moderately altered by aqueous fluid. The igneous rocks are mainly made of coarse-grained olivine, similar to some Martian meteorites. We interpret them as an olivine cumulate, formed by settling and enrichment of olivine through multi-stage cooling of a thick magma body.