Structure of the Lunar Interior

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Shallow structure – crust and upper mantle (emphasis on GRAIL)

    1. Compositional constraints:  Remote sensing
      • Pure anorthosite
      • Central peaks, norite
      • Olivine
      • SPA, PKT; opx vs olivine, magma ocean overturn (magmatic evolution 1?), etc
      • Mixed feldspathic layer
    2. Crustal thickness
      • Mean thickness, implications for Al, KREEP, etc.
      • Global asymmetry
      • Density and density gradients
    3. Basin-related structure
      • Mantle excavation vs. crustal thickness
      • Signature of ring faults and ring dikes
      • Mascon structure
    4. GRAIL structures
      • Dikes – implications for early lunar evolution
      • PKT
      • Volcanoes, lava tubes (development of the Moon chapter)
      • Maria thickness
      • Crater signatures
      • Small-scale variability

Deep mantle and core structure (GRAIL, seismology, other geophysical constraints)

    1. Compositional constraints (mare basalt elemental abundances)
    2. Seismology
      • Differences between most recent published seismic structure models
      • Evidence for partial melt (seismic Q, tie-ins to k2 & heat flow)
      • Evidence for layered core (array seismology)
    3. LLR (MOI)
    4. GRAIL (mass, gravity coefficients, dissipation, love numbers)
      • William et al. 2014 &2015, Yan et al. 2015, Matsumoto et al. 2015
    5. Magnetic constraints on core (magnetism chapter)
      • Magnetic induction
      • Paleomagnetic constraints on core dynamo

Thermal evolution

    1. Apollo heat flow & GRAIL constraints
    2. Mantle convection

Lunar geodynamics

    1. Lunar figure and implications for the rotational-tidal evolution
      1. Work by Garrick-Bethel, Matsuyama, Keane
    2. Magma ocean overturn  (magmatic evolution 1?)
    3. Mascon processes (cratering processes chapter)

Potential contributors:
Shallow structure:        Jeff Andrews-Hanna
Deep structure:            Renee Weber, Isamu Matsuyama
Thermal evolution:       Walter Kiefer, Matt Siegler
Lunar figure &
implications for the
rotational-tidal
evolution:                     James Keane, Isamu Matsuyama