Factors Controlling the Ascent of Magma on the Moon.

Details Factors Controlling the Ascent of Magma on the Moon. Factors Controlling the Ascent of Magma on the Moon.

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm...p21a11w&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #P21A-11 INVITED

Mathematics

Logic

5430 Interiors (8147), 6250 Moon (1221), 8434 Magma Migration, 8450 Planetary Volcanism (5480)

Scientific paper

The ability of a body of magma to ascend from the mantle of a planet depends on several factors: the density structure of the lithosphere; the density of the magma (which may change as it ascends if it contains exsolvable volatiles); the depth of origin of the magma; and the stress regime and rheology of the lithosphere (both of which will vary, with depth and over geologic time). We review these factors and discuss how the locations of density traps and rheological traps will have changed during lunar history. We then demonstrate that, early in lunar history, a diapiric magma body generated by magma segregation after pressure release melting in the head of a mantle plume may have reached a density trap at the base of the crust before reaching a rheological trap, whereas the reverse is almost certainly true later in lunar history. The order in which these events occur strongly influences the size of the magma body which can detach from the diapir and propagate into the crust. If the rheological trap is below, but sufficiently close to, the density trap, giant dikes can be created which penetrate the entire lithosphere. These are almost certainly the feeders required to explain the large volume mare lava flows and lava ponds, and are probably the intrusions inferred to be the cause of many linear rilles. If the rheological trap is too far below the density trap, the volumes of individual melt bodies able to reach the surface are less by several orders of magnitude, no matter how great the buoyancy of the magma. Indeed, over a wide range of conditions, increasing the buoyancy decreases the volume of magma delivered in each pulse.

Affiliated with

Also associated with

No associations

Rating

Factors Controlling the Ascent of Magma on the Moon. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Factors Controlling the Ascent of Magma on the Moon., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Factors Controlling the Ascent of Magma on the Moon. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1271948