Full metadata
Title
Timing and structural control of gold mineralization, Santa Gertrudis, Sonora, Mexico
Description
The Santa Gertrudis Mining District of Sonora, Mexico contains more than a dozen purported Carlin-like, sedimentary-hosted, disseminated-gold deposits. A series of near-surface, mostly oxidized gold deposits were open-pit mined from the calcareous and clastic units of the Cretaceous Bisbee Group. Gold occurs as finely disseminated, sub-micron coatings on sulfides, associated with argillization and silicification of calcareous, carbonaceous, and siliciclastic sedimentary rocks in structural settings. Gold occurs with elevated levels of As, Hg, Sb, Pb, and Zn. Downhole drill data within distal disseminated gold zones reveal a 5:1 ratio of Ag:Au and strong correlations of Au to Pb and Zn. This study explores the timing and structural control of mineralization utilizing field mapping, geochemical studies, drilling, core logging, and structural analysis. Most field evidence indicates that mineralization is related to a single pulse of moderately differentiated, Eocene intrusives described as Mo-Cu-Au skarn with structurally controlled distal disseminated As-Ag-Au.
Date Created
2011
Contributors
- Geier, John Jeffrey (Author)
- Reynolds, Stephen J. (Thesis advisor)
- Burt, Donald (Committee member)
- Stump, Edmund (Committee member)
- Arizona State University (Publisher)
Topical Subject
Resource Type
Extent
xviii, 286 p. : ill. (some col.), maps (some col.)
Language
eng
Copyright Statement
In Copyright
Primary Member of
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.9123
Statement of Responsibility
by John Jeffrey Geier
Description Source
Retrieved Sept. 19, 2012
Level of coding
full
Note
thesis
Partial requirement for: M.S., Arizona State University, 2011
Field of study: Geology
System Created
- 2011-08-12 04:29:58
System Modified
- 2021-08-30 01:53:31
- 3 years 2 months ago
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