Lunar floor-fractured craters (FFCs) represent the surface manifestation of a class of shallow crustal intrusions in which magma-filled cracks (dikes) rising to the surface from great depth encounter contrasts in host rock lithology (breccia lens, rigid solidified melt sheet) and intrude laterally to form a sill, laccolith or bysmalith, thereby uplifting and deforming the crater floor. Recent d...

Abstract The 1.87–1.84 Ga Black Hills dike swarm of the Kalahari craton (South Africa) is coeval with several regional magmatic provinces used here to resolve craton's position during Columbia assembly. We report a new 1850 ± 4 Ma (U-Pb isotope dilution–thermal ionization mass spectrometry [ID-TIMS] on baddeleyite) crystallization age for one and paleomagnetic data 34 dikes which 8 have precise...

Study of the concentration and isotopic composition of strontium and rubidium in hornblende diorite dikes and sills of Precambrian age from the Panamint Mountains of California showed that these rock systems were enriched in radiogenic Sr during a late Mesozoic metamorphism. Enrichments in radiogenic Sr were observed for total-rock samples which yielded apparent ages of up to 34,000 m.y., altho...

[1] High-resolution altimetry from the Mars Orbiter Laser Altimeter (MOLA) provides new data to test the interpretation that unusual flow-like deposits in Elysium-Utopia were emplaced as lahars (mass flows fluidized by water that are induced by volcanism). Using several data products derived from MOLA altimetry, we confirm that two major types of terrain dominate the region: (1) lava flows and ...

Shallow dike intrusion and widening was proposed several decades ago as a cause of surface faulting and graben formation on Earth. This hypothesis was subsequently applied to the spectacular linear and/or radial graben systems visible on Mars. However, a recent study has suggested that shallow dike intrusion on Mars results in contractional folding and uplift adjacent to dike walls rather than ...

We investigate the 19 September 2021 eruption of Cumbre Vieja volcano (La Palma, Canary Islands, Spain). In particular, we analyze Differential Interferometric Synthetic Aperture Radar (DInSAR) measurements obtained by processing Sentinel-1 images acquired from both ascending and descending orbits. First, show importance, for oceanic islands like La investigating DInSAR products retrieved time ...