Catastrophic growth of totally molten magma chambers in months to years.

The vertical growth rate of basaltic magma chambers remains largely unknown with available estimates being highly uncertain. Here, we propose a novel approach to address this issue using the classical Skaergaard intrusion that started crystallizing from all margins inward only after it had been completely filled with magma. Our numerical simulations indicate that to keep the growing Skaergaard magma chamber completely molten, the vertical growth rate must have been on the order of several hundreds to a few thousands of meters per year, corresponding to volumetric flow rates of tens to hundreds of cubic kilometers per year.

A 5-km-thick reservoir with > 380,000 km of magma within the ancient Earth's crust.

Several recent studies have argued that large, long-lived and molten magma chambers may not occur in the shallow Earth's crust. Here we present, however, field-based observations from the Bushveld Complex that provide evidence to the contrary. In the eastern part of the complex, the magmatic layering continuously drapes across a ~ 4-km-high sloping step in the chamber floor.

Chromitite layers indicate the existence of large, long-lived, and entirely molten magma chambers.

The classical paradigm of the 'big magma tank' chambers in which the melt differentiates, is replenished, and occasionally feeds the overlying volcanos has recently been challenged on various grounds. An alternative school of thought is that such large, long-lived and largely molten magma chambers are transient to non-existent in Earth's history. Our study of stratiform chromitites in the Bushveld Complex-the largest magmatic body in the Earth's continental crust-tells, however, a different story.

[In-hospital outcomes of endarterectomy and coronary artery bypass grafting in multiple diffuse lesions of coronary arteries].

Background: According to a series of studies, performing coronary endarterectomy in direct myocardial revascularization increases the risk of myocardial infarction and in-hospital mortality. There are no commonly accepted indications for carrying out endarterectomy, and in clinical practice this technique is used in severe diffuse lesions of coronary arteries.

Aim: The study was aimed at assessing in-hospital clinical outcomes of coronary artery bypass grafting (CABG) with the use of endarterectomy in patients with severe multiple diffuse lesions of coronary arteries.

Magmatic karst reveals dynamics of crystallization and differentiation in basaltic magma chambers.

An understanding of magma chamber dynamics relies on answering three important yet highly controversial questions: where, why, and how magma chambers crystallize and differentiate. Here we report on a new natural phenomenon-the undercut-embayed chamber floor in the Bushveld Complex-which allows us to address these questions. The undercut-embayed floor is produced by magmatic karstification (i.