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Absence of any calc-alkaline rocks indicates no crustal recycling by plate tectonics
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Classroom Contents
The Mineralogy of Mars from Rocks in Hand
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- 1 Intro
- 2 The mineralogy of Mars, from 125 rocks in hand
- 3 Martion meteorites contain shock-implanted gas that matches the unique Mars atmospheric composition
- 4 Unique, ancient martian meteorites
- 5 Meteorite element ratios constrain the bulk planet composition and volatile inventory
- 6 Meteorites indicate Mars has a unique and diagnostic oxygen isotopic fingerprint
- 7 Martian meteorites formed by melting of ancient mantle sources with distinct radiogenic isotopes, trace elements, and redox states
- 8 Trace elements are both depleted and enriched
- 9 Igneous crystallization oges vary, but are mostly young
- 10 Cosmic-ray exposure ages are interpreted to date times of ejection from Mars
- 11 How representative of Mars are martian meteorites?
- 12 Martian meteorites and rocks analyzed by rovers
- 13 Trends in minor elements indicate different mantle source compositions for meteorites and rover analyzed rocks
- 14 Absence of any calc-alkaline rocks indicates no crustal recycling by plate tectonics
- 15 No detectable granitic rocks, just feldspathic rocks
- 16 No Earth-like continental crust on Mars
- 17 Despite much odo about purported evidence for life in ALH 84001, its organic matter, minerals, and intriguing
- 18 Conclusions Mars is a basalt covered world with sediments derived from cumulates that reflect diverse ancient mantle sources
