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California Gold Rush Maria Warnick April 10, 2006 History Before the Rush Pop. 18000 Mainly Spanish speaking San Francisco pop. of a few hundred. Sacramento City est. – Sutter’s Fort. 1848 James W. Marshall first found gold in the current Sacramento area!!!! The Rush Begins – 1849

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california gold rush

CaliforniaGold Rush

Maria Warnick

April 10, 2006

history
History
  • Before the Rush
    • Pop. 18000
    • Mainly Spanish speaking
    • San Francisco pop. of a few hundred.
    • Sacramento City est. – Sutter’s Fort.
  • 1848 James W. Marshall first found gold in the current Sacramento area!!!!
transportation overland routes
Transportation-Overland Routes
  • California trail – 1841
    • 2000 miles from Missouri River to Central Valley
    • 4-5 months
    • 5000-6000 wagons in 1849
    • 500-600 /day passing Fort Laramie
  • Mexico
geysers clear lake area of california
Geysers-Clear Lake area of California

Gold-Mercury deposits in Geothermal settings.

geology
Geology
  • Three units
    • Franciscan complex
    • Coast Range ophiolite
    • Great Valley sequence
  • Tertiary and Quaternary volcanic
minerals
Mercury deposits - CA 85% of the US

Manhattan deposit mined for 100 years before gold was found.

Gold deposits – geothermal style gold deposit

12,000-15,000 oz. from 1870’s to 1950’s

Produced from hydrocarbon-rich-quartz-carbonate veins

Minerals
references
References
  • “Gold! Gold! Gold from the American River!”, California Geologcial Survey, http://www.consrv.ca.gov/cgs/geologic_resources/gold/index.htm, viewed April 9, 2006.
  • Nicholas, C., 2004, Dirty Gold: The toxic legacy of cyanide leach mining, Minning Australia, University of technology Sydney. journalism.uts.edu.au/ miningoz_2004/DirtyGold/
  • Prelude to the Gold Rush, UC Santa Barbara Department of Geography. http://www.geog.ucsb.edu/~joel/g148_f05/lecture_notes/gold_rush/gold_rush1.html, viewed April 9, 2006.
  • Sherlock, R.L., 2005, The relationship between the Mclaughlin gold-mercury deposit and active hydrothermal systems in the Geysers-Clear Lake area, northern Coast Ranges, California: Ore Geology Reviews, n. 26, p. 349-382.