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GEOCHEMISTRY OF MAJUBA HILL, NEVADA.

Journal of Geochemical Exploration

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Abstract

Majuba Hill is the erosional remnant of a mineralized volcanic complex of rhyolite porphyry stocks, dikes, sills and irregular masses of breccia intruded into Triassic(? ) argillites. Majuba Hill is best known for its Cu and Sn ore; in addition, it was mineralized with other metals of possible economic significance, most notably, Mo, Ag, and U. Although this is an intrusive complex with no evidence of any extrusive phases, it was intruded sufficiently near the surface to develop a porphyritic texture. Intense sericitic and argillic alteration affected all stages of intrusion. Fresh rocks were not available for K-Ar analyses. Several samples of feldspars and sericite from altered zones yielded K-Ar ages for the alteration of 24. 7 to 25. 5 m. y. The tight clustering of ages suggests that all stages of the complex were altered within less than 1 m. y.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
GEOCHEMISTRY OF MAJUBA HILL, NEVADA.
Series title:
Journal of Geochemical Exploration
Volume
25
Issue:
1-2
Year Published:
1984
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Geochemical Exploration
First page:
232
Last page:
233
Number of Pages:
2
Conference Title:
Explor for Ore Dep of the North Am Cordillera, Sel Pap of the Symp of the Assoc of Explor Geochem
Conference Location:
Reno, NV, USA
Conference Date:
25 March 1984 through 28 March 1984