Quickening the Pulse: Fractal Tempos in Continental Arc Magmatism

Mantle mixing and continental breakup magmatism

The frequent formation of large igneous provinces during the opening of the Atlantic Ocean is a surface manifestation of the thermal and chemical state of convecting mantle beneath the supercontinent Pangea. Recent geochemical and geophysical findings from the North Atlantic igneous province all point to the significant role of incomplete mantle mixing in igneous petrogenesis. On the basis of a...

Subduction erosion: Rates, mechanisms, and its role in arc magmatism and the evolution of the continental crust and mantle

Crustal contributions to arc magmatism in the Andes of Central Chile

Fifteen andesite-dacite stratovolcanoes on the volcanic front of a single segment of the Andean arc show along-arc changes in isotopic and elemental ratios that demonstrate large crustal contributions to magma genesis. All 15 centers lie 90 km above the Benioff zone and 280 _+ 20 km from the trench axis. Rate and geometry of subduction and composition and age of subducted sediments and seafloor...

Inline Caching Meets Quickening

Inline caches effectively eliminate the overhead implied by dynamic typing. Yet, inline caching is mostly used in code generated by just-in-time compilers. We present efficient implementation techniques for using inline caches without dynamic translation, thus enabling future interpreter implementers to use this important optimization technique— we report speedups of up to a factor of 1.71—with...

Introduction: Anatomy of rifting: Tectonics and magmatism in continental rifts, oceanic spreading centers, and transforms

Research at continental rifts, mid-ocean ridges, and transforms has shown that new plates are created by extensional tectonics, magma intrusion, and volcanism. Studies of a wide variety of extensional processes ranging from plate thinning to magma intrusion have helped scientists understand how continents are broken apart to form ocean basins. However, deformation processes vary significantly d...