Mexican silver surge

How metalliferous brines line Mexican epithermal veins with silver

We determined the composition of ~30-m.y.-old solutions extracted from fluid inclusions in one of the world's largest and richest silver ore deposits at Fresnillo, Mexico. Silver concentrations average 14 ppm and have a maximum of 27 ppm. The highest silver, lead and zinc concentrations correlate with salinity, consistent with transport by chloro-complexes and confirming the importance of brine...

A Compressor Surge Control System: Combination Active Surge Control System and Surge Avoidance System

A novel method for combining active surge control system (ASCS) and surge avoidance system (SAS) for a centrifugal compressor is presented. ASCS is a promising method to improve compressor operating area by stabilizing surge. However, this method is not applied yet in industrial compressors. Safety issue is considered in implementing the ASCS. A failure in ASCS may endanger the compressor by en...

Revamping Dracula on the Mexican Silver in Fernando Méndez’s El vampiro

Glacier surge mechanism: 1982-1983 surge of variegated glacier, alaska.

The hundredfold speedup in glacier motion in a surge of the kind the kind that took place in Variegated Glacier in 1982-1983 is caused by the buildup of high water pressure in the basal passageway system, which is made possible by a fundamental and pervasive change in the geometry and water-transport characteristics of this system. The behavior of the glacier in surge has many remarkable featur...

Surge Suppressors and Clamps

A tutorial paper with a review of the technologies available in the mid-eighties for surge protection of lowvoltage end-user equipment. The principles of operation are described for “crowbar devices” (now generally described under the standardized name of “voltage switching devices”) and for “voltage clamping devices: (now generally described under the standardized name of “voltage limiting dev...