venerdì 11 luglio 2014


Sinus Iridum region

Laplace domes (termed Laplace 5-6)

by Carmelo Zannelli

by Paolo Lazzarotti

Dome
Longitude
Latitude
Diameter [km]
Heigth [m]
    Slope[°]
Laplace 5
Laplace 6
-28.66°
-29.16°

 41.17°
 47.08°

9.0 ± 0.5
10.0 ± 0.5  

125 ± 15
  95 ± 10

    1.6 ± 0.1
    0.7 ± 0.1


Laplace 5 (L5), located in Sinus Iridum, has a diameter of 9.0 ± 0.5 km, height of 125 ± 15 m with an average slope of 1.60° ± 0.10°. The edifice volume is determined to 3.7 km3. Laplace 5 belongs to class B2. Rheologic modelling indicates that it was built by lava of moderate viscosity of 2.4 x 105 Pa s, erupting at a high effusion rate of 110 m3 s-1 over a period of time of 1.2 years. The second elongated dome, named Laplace 6 (L6), with a low average slope of 0.7° ± 0.10° is considered a putative intrusive dome, and modelling results indicate it belongs to class In2.