Topic
Mariposite
About: Mariposite is a research topic. Over the lifetime, 2 publications have been published within this topic receiving 8 citations.
Papers
TL;DR: This paper showed that gold-quartz-carbonate mineralization was not associated with Sierra Nevada plutonism, but instead was related to changes in plate dynamics, and generation and migration of CO2-rich metamorphic fluids along the continental margin of North America.
Abstract: Mariposite (Cr-rich muscovite) crystals formed the during metasomatic replacement of serpentinite yield 40Ar/39Ar ages demonstrating that gold-quartz-carbonate mineralization in the Sierra Nevada Foothills Metamorphic Belt occurred as early as 152 Ma and continued until at least 122 Ma. The earliest gold mineralization is found in the Grass Valley District; mineralization subsequently migrated southward along the Melones fault zone, forming the Mother Lode Gold Belt. These ages correspond to a lull in Sierra Nevada plutonism, and with periods of ductile deformation along the Melones and related fault zones. Our data suggest that gold-quartz-carbonate mineralization was not associated with Sierra Nevada plutonism, but instead was related to changes in plate dynamics, and generation and migration of CO2-rich ore-forming metamorphic fluids along the continental margin of North America. In this model, shallow gold mineralization was produced by heating of the lower crust within the structural melange of the S...
11 citations
1 Sep 1955
TL;DR: In this article, it was shown that the green mica from Belvadi, though resembling fuchsite in its optical characters, does not correspond to it in chemical composition, and that it closely resembles mariposite, a typical chrome-phengite from the type locality, Mariposa Estate in California.
Abstract: In the light of the above studies, it is evident that the green mica from Belvadi, though resembling fuchsite in its optical characters, does not correspond to it in chemical composition. On the other hand, it closely resembles mariposite, a typical chrome-phengite, from the type locality, Mariposa Estate in California (Whitmore, Berry and Hawley, 1946, p. 4). Hence it is concluded that the Belvadi mineral is not fuchsite but mariposite.
1 citations
Performance Metrics
| Year | Papers |
|---|---|
| 2008 | 1 |
| 1955 | 1 |