-
Jasperoid is a rare,
peculiar type of
metasomatic alteration and
occurs in two main forms;
sulfidic jasperoids and
hematitic jasperoids. True jasperoids...
- gray is
mostly dolomite with a
little translucent quartz. Dark gray is
jasperoid and ore minerals.
Veinlet along lower edge of
specimen contains sphalerite...
- Jadeitite –
Metamorphic rock
found in blueschist-grade
metamorphic terranes Jasperoid – A hematite-silica
metasomatite analogous to a
skarn Kenyte – Type of...
- Theodore, T.G. and G.M. Jones. (1992).
Geochemistry and
geology of gold in
jasperoid,
Elephant Head area,
Lander County,
Nevada [U.S.
Geological Survey Bulletin...
-
silicate rich
hydrothermal water. For example,
dolomite is
transformed into
jasperoid.
Another alteration is the
formation of clay
minerals by
interaction of...
- calc-silicates, and silica-hematite
fluids resulting in
production of
jasperoids,
manto ore
deposits and
pervasive zones of silicification,
typically in...
- and Geology,
Bulletin 87, p.141. E. J.
Young and T. G.
Lovering (1966)
Jasperoids of the Lake
Valley mining district, New Mexico, US
Geological Survey,...
- medium-bedded gray limestone, and
yellowish brown residual clays with "
jasperoid" diagnostic. The
Forest Service has
conducted a
survey of
their lands...
-
Manitou Dolomite. Ore
minerals are pyrite, sphalerite, and galena, in
jasperoid and
manganosiderite gangue. In
upper levels, the ore
minerals are oxidized...
-
microscopic gold ****ociated with
pyrite and ****nic
sulfides and
particularly jasperoid in
folds and faults. Over 200
million ounces of gold are
known to be distributed...
