Wikipedia about the elemental composition of Mars:

Based on these data sources, scientists think that the most abundant chemical elements in the Martian crust, besides silicon and oxygen, are iron, magnesium, aluminum, calcium, and potassium. These elements are major components of the minerals comprising igneous rocks. The elements titanium, chromium, manganese, sulfur, phosphorus, sodium, and chlorine are less abundant but are still important components of many accessory minerals and of secondary minerals (weathering products) in the dust and soils (regolith).

But are the above named elements all the different chemical elements that have been found on Mars ?

I would like to know for sure by reading all the scientific articles, that put together, give proof of all the found elements on Mars.

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    $\begingroup$ Why don't you start with the references given in the wiki section? Also it is not very usual to put all elements in one article. $\endgroup$ – AtmosphericPrisonEscape Nov 5 '19 at 17:32
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    $\begingroup$ Mars is very big - you can take it for granted that all elements, and all naturally occurring isotopes of those elements, occur on Mars. $\endgroup$ – Ags1 Nov 5 '19 at 18:15
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    $\begingroup$ "at what depth?" We have no way of knowing, since nobody ever drilled a hole into Mars. Assumptions about the bulk compositions stem from surface mineralogy and martian meteorites. $\endgroup$ – AtmosphericPrisonEscape Nov 5 '19 at 18:47
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    $\begingroup$ @AtmosphericPrisonEscape That's exactly what i meant to say ! Maybe with the Exomars driller still more elements will be found. $\endgroup$ – Cornelisinspace Nov 5 '19 at 19:19
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    $\begingroup$ @ChristopherJamesHuff: To make this argument is pretty unscientific, don't you think? You want to know instead of assuming, or? In fact curator.jsc.nasa.gov/antmet/mmc/introduction.cfm (based on martian meteorites) seems to indicate that the oxygen fractionation line is different (indicating different formation age, fig. 3), and the element abundances are similar, but different in important places. Elemental differences hint at differences in the formation and evolution processes, and you don't want to assume that information away. $\endgroup$ – AtmosphericPrisonEscape Nov 6 '19 at 22:46

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