Hydrothermal alteration in the Kawarage and Doroyu areas, Akita Prefecture.

First-Ever Acute Stroke in the Very Elderly: A Retrospective Study in Akita Prefecture, Japan,

Stroke is the 3rd leading cause of mortality and one of the main causes of long-term intellectual, psychological, and physical disability in Japan as well as in the other industrialized countries [1]. It is well known that the incidence of stroke increases with age [1-4]. In most of the developed countries the mean age of the population increased significantly in the last few decades due to the...

Hydrothermal Alteration Associated with the Silver Queen

Eocene Hydrothermal Systems and Contrasting Hydrothermal Alteration in the Battle Mountain District, Nevada

Geology and Hydrothermal Alteration of the Mercur Gold Deposit, Utah

The term "Carlin-type" deposit has been applied to a number of low-grade, sedimentary rock-hosted gold deposits that have been discovered and brought into production in the western United States since the 1960s. Carlin-type deposits are characterized by replacement of carbonate and silty carbonate rocks by silica, pyrite, barite, various arsenic, mercury, antimony, and thallium minerals and by ...

Calculation of Mass Transfer and Element Mobility During the Hydrothermal Alteration in the Sungun PORPHYRY Copper Deposit Iran

The Sungun porphyry copper deposit is located in northwestern Iran and is associated with diorite/granodiorite to quartz-monzonite of Miocene age, which intruded Eocene volcanosedimentary and Cretaceous carbonate rocks. Copper mineralization was accompanied by both potassic and phyllic alteration. Three main mineralization related alteration episodes (potassic, transition, and phyllic alteratio...