Valdez, F., Gratuze, B., Yepez, A., & Hurtado, J. (2005). Evidencia Temprana de Metalurgía en la Costa Pacifica Ecuatorial. [Evidence of Early Metallurgy, Pacific Coast of Ecuador.] Bogota: Boletin Museo del Oro 53.
http://www.banrep.gov.co/museo/esp/boletin/53/v-g-y-h.htm

has been cited by the following article:

• TITLE: ICP Analyses from the Cinnabar-Mercury Occurrence at Azogues (Loma Guashon), Ecuador: Ancient Industrial Uses and Human Health Implications

  AUTHORS: William E. Brooks

  KEYWORDS: Gold, Mercury, Ecuador, Alluvial, Pre-Columbian

  JOURNAL NAME: Archaeological Discovery, Vol.6 No.1, January 8, 2018

  ABSTRACT: ICP (Inductively Coupled Plasma) analyses of the Cretaceous marine sandstones at the Azogues (Loma Guashon), Ecuador cinnabar-mercury occurrence gave 11 - 113 ppm Hg. However, the ancient Azogues mines have been well documented previously, for example: 1) a 1799 hand drawn map “Plan del Cerro Mineral de Azogue” shows numerous adits; 2) during Colonial time, Cuenca founder, Gil Ramirez Davalos was owner of the mercury mines; 3) in the late 1800s, Teodoro Wolf described well-worked adits at Guashon and samples with 0.5% Hg; and more recently, 4) the Metallogenic Map of Ecuador shows the mercury occurrence at Azogues. Mineral resource assessment of the Azogues occurrence is important to regional archaeological studies of resource availability and ancient use of cinnabar as a pigment and as a source of mercury for gold amalgamation before the arrival of the Europeans, and possibly later, for silver amalgamation, during Colonial time.