Magmatic Intrusion Structure

  • Raffaello Lena
Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-9213-9_224-1

Definition

Any domical or ringlike structure produced by surface manifestation of a subsurface magmatic intrusion. Intrusions are subsurface concentrations of magma that have locally uplifted the soil but do not erupt, a mechanism reported for terrestrial laccoliths (Pollard and Johnson 1973).

Synonyms

Morphometry

Terrestrial laccoliths and lunar putative intrusive domes have in common that they are characterized by elongated outlines (circularity <0.8) and very low slope (<0.9°). Terrestrial laccoliths are 1–10 km in radius or length and 10–100 m in thickness (Michaut 2010).

Interpretation

Surface manifestations of subsurface intrusions where a subsurface accumulation of magma caused an up-doming of the bedrock layers (Lena et al. 2013). Fractures probably formed by the tensional stress caused by flexure of the laccolith overburden.

Formation

A pressurized magma that penetrates between layers of solid rock may change the shape of these...

Keywords

Magmatic Body Magmatic Intrusion Radial Fracture Surface Manifestation Mare Basalt 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Geologic Lunar Research (GLR) GroupRomeItaly