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1
U.S. Geological Survey professional paper
Almost all of the tactite-bearing inclusions in quartz diorite and hornblende
gabbro are bordered by a zone in which the igneous rock has been epidotized
irregularly for a thickness of a few inches to 20 feet or more. In places, the
igneous rock ...
Geological Survey (U.S.), 1965
2
Geological Survey Professional Paper
Another specimen shows one part that retains the pegmatitic habit, although it is
composed of pink microcline, white quartz, green epidotized albite, and large
black crystals of hedenbergite that have been partly altered to hornblende.
Geological Survey (U.S.), 1935
3
Origin of the copper deposits of the Ducktown type in the ...
Another specimen shows one part that retains the pegmatitic habit, although it is
composed of pink microcline, white quartz, green epidotized albite, and large
black crystals of hedenbergite that have been partly altered to hornblende.
Clarence Samuel Ross, 1935
4
Abstracts for 1968: Abstracts of papers submitted for seven ...
The mineralized zone consists of epidotized amphibolite and lenses of quartz-
epidote-clinozoisite and quartz-albite. Native copper occurs both as small grains
unevenly dstributed through the epidotized zone and as large masses in ...
5
Professional paper - United States Geological Survey
... contained sufficient phosphorus to cause the development of accessory apatite
, and that they were deficient in aluminum, ferric iron, calcium, magnesium, and
alkalies. From the study of the garnetized and epidotized porphyry it would be ...
Geological Survey (U.S.), 1918
6
The Copper Deposits of Michigan
On Nugget Creek a very little native copper occurs in the reddish, highly
epidotized amygdaloidal portion of a basaltic flow. The copper is intimately
associated with calcite and appears to be later than the chlorite, epidote, quartz,
and prehnite.
Bert Sylvenus Butler, Wilbur Swett Burbank, 1929
7
Geological Survey of Canada, Open File 2156
3A Fine grained to aphanitic, grey to green, epidotized pillow lava with common
diabase and gabbro dikes. 3B Fine grained to aphanitic grey to green, commonly
epidotized pillow lava with extensive pillow breccia and isolated pillows in ...
Swinden, H S, Evans, D T W, Kean, B F
8
Geological Survey Bulletin
The rock is altered hornblende pegmatite, consisting of epidotized pale tan oligo-
clase-quartz facies and pyroxenized greenish hornblende facies, and inclusions
of hornblende gneiss. A 3-foot channel sample cut across a mafic part of this ...
9
Geochemical Exploration 1974: Proceedings Of The Fifth ...
The mineralization, considered by Losert to be epigenetic, lies stratigraph~ ically
above a 100 m thick epidotized horizon which has been strongly depleted in
copper and sulphur. The mineralized flows have a mean of 65 ppm Rb which is
1.5 ...
10
Geology of the Composite Avalon Terrane of Southern New England
It seems highly unlikely that these 3 epidotized dikes could postdate the other
dikes in the area, none of which appear to have experienced the same relatively
severe alteration event. These andesites are probably late Proterozoic in age.
Anthony D. Socci, James William Skehan, Geoffrey W. Smith, 1990
