12 research outputs found
Reverberation Mapping Measurements of Black Hole Masses in Six Local Seyfert Galaxies
We present the final results from a high sampling rate, multi-month,
spectrophotometric reverberation mapping campaign undertaken to obtain either
new or improved Hbeta reverberation lag measurements for several relatively
low-luminosity AGNs. We have reliably measured thetime delay between variations
in the continuum and Hbeta emission line in six local Seyfert 1 galaxies. These
measurements are used to calculate the mass of the supermassive black hole at
the center of each of these AGNs. We place our results in context to the most
current calibration of the broad-line region (BLR) R-L relationship, where our
results remove outliers and reduce the scatter at the low-luminosity end of
this relationship. We also present velocity-resolved Hbeta time delay
measurements for our complete sample, though the clearest velocity-resolved
kinematic signatures have already been published.Comment: 52 pages (AASTeX: 29 pages of text, 8 tables, 7 figures), accepted
for publication in the Astrophysical Journa
Clay fraction geochemistry (Cu) of till from the region of the Woodjam prospect. Till geochemistry and mineralogy: vectoring towards Cu porphyry deposits in British Columbia, Canada
Comparisons of pXRF analyses with ICP-AES, ICP-MS and IR analysis
Clay fraction geochemistry (Cu) of till from the region of the Highland Valley Copper deposit. Till geochemistry and mineralogy: vectoring towards Cu porphyry deposits in British Columbia, Canada
Comparisons of pXRF analyses with ICP-AES, ICP-MS and IR analysis
Chalcopyrite and epidote content of the 0.25-0.5 mm and >3.2 SG fraction of till from the region of the Highland Valley Copper deposit. Till geochemistry and mineralogy: vectoring towards Cu porphyry deposits in British Columbia, Canada
Comparisons of pXRF analyses with ICP-AES, ICP-MS and IR analysis
Geochemical and mineralogical dispersal in till from the Mount Polley Cu-Au porphyry deposit, central British Columbia, Canada
<p>The Quesnel terrane in the Interior Plateau of British Columbia, Canada, is highly prospective for locating new porphyry deposits;
however, the bedrock in this region is obscured by a nearly continuous blanket of till, making mineral exploration challenging.
Located within the Quesnel terrane is the Mount Polley deposit. It is an alkaline, silica-undersaturated, Cu-Au porphyry deposit
mined by Imperial Metals Corporation. Eighty-six basal till samples were collected for geochemical and mineralogical analyses
in the region of this deposit. Ore elements (Ag, Au and Cu), as well as pathfinder element (Hg and Zn) contents in till reflect
detrital glacial dispersal from the Mount Polley deposit. The distribution of anomalous mineral counts of andradite garnet,
apatite, chalcopyrite, epidote, jarosite and native gold also reflect glacial dispersal from the deposit. Outcrop-scale ice-flow
indicators indicate a dominant ice-flow event to the NW that was preceded by a southwestward glacial advance. The element
and mineral signatures of the Mount Polley Cu-Au porphyry deposit are dispersed in sub-glacial surface tills up to 12 km in
the down-ice (NW) direction. We demonstrate that till geochemistry and mineralogy can serve for mineral exploration of Cu-Au
porphyry mineralization in drift covered areas.
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