Acquisitions and Technical Serviceshttp://hdl.handle.net/11122/51742024-03-21T17:57:20Z2024-03-21T17:57:20ZPorphyry copper, copper skarn, and volcanogenic massive sulfide occurrences in the Chandalar copper district, AlaskaNicholson, Lisahttp://hdl.handle.net/11122/119572021-05-08T01:02:00Z1990-05-01T00:00:00ZPorphyry copper, copper skarn, and volcanogenic massive sulfide occurrences in the Chandalar copper district, Alaska
Nicholson, Lisa
Metamorphosed porphyry copper, copper skarn, and volcanogenic massive sulfide (VMS) occurrences have been found in 5 key prospects within Devonian rocks of the Chandalar copper district, Alaska. The Venus, Victor, Eva, and Evelyn Lee prospects contain "proximal" porphyry copper/copper skarn mineralization, whereas the Luna prospect contains "distal" Cu-Zn skarn and Cu-Zn VMS mineralization. Porphyry copper mineralization is recognized by granodiorite composition meta-intrusives; zoned potassic, sericitic and propylitic alteration; and del34S values of -1.5 to -0.6 per mil. Skarns consist of
andraditic garnet (Ad30-100) and diopsidic pyroxene (Hd9-46), and have del34S values of -4.7 to -1.1 per mil. Alteration types in intrusive rocks and adjacent skarn are generally compatible. VMS occurrences contain chloritic and silicic alteration, and massive sulfides have del34S values of -0.8 to 6.9 per mil, consistent with values from known Devonian VMS deposits.
Thesis (M.S.) University of Alaska Fairbanks, 1990
1990-05-01T00:00:00ZThe kinetics of glucose limited growth by a marine yeastMcNab, Allen Davidhttp://hdl.handle.net/11122/105602020-03-06T02:41:28Z1969-05-01T00:00:00ZThe kinetics of glucose limited growth by a marine yeast
McNab, Allen David
The kinetics of glucose limited growth by a marine
yeast, shown to be a Rhodotorula species, have been
studied in a continuous culture apparatus. The saturation
constant, in synthetic media, has been calculated to be
0.25 mg/l, on the assumption that saturation kinetics are
followed, The maximum growth rate was determined in both
synthetic media, and artificial sea water. On the basis
of inhibition kinetics, the kinetic behavior of this
yeast in the marine environment has been predicted.
The effect of temperature on the maximum growth
rate has been determined and, on the assumption of a
similar effect on the saturation constant, the saturation
constant has been postulated to be in agreement with
similar values determined for other microorganisms.
Thesis (M.S.) University of Alaska Fairbanks, 1969
1969-05-01T00:00:00ZTest embargo with open-ended date 6/13/19http://hdl.handle.net/11122/104202020-03-06T02:31:33Z2019-01-01T00:00:00ZTest embargo with open-ended date 6/13/19
Testing embargoes without end dates ("permanent embargoes"), embargo added by policies after submission
2019-01-01T00:00:00ZTest embargo policy added 9/11/18http://hdl.handle.net/11122/96112020-03-05T15:50:06Z2018-09-01T00:00:00ZTest embargo policy added 9/11/18
2018-09-01T00:00:00Z