-
richer in Na2O plus K2O
compared to SiO2.
Basanite appears early in the
alkaline magma series and
basanites are
found wherever alkaline magma is erupted...
- basaltes, a
misspelling of
Latin basanites "very hard stone",
which was
imported from
Ancient Gr**** βασανίτης (
basanites), from βάσανος (basanos, "touchstone")...
-
border with Kazakhstan, is
noted for its colossal, open-cast
copper mine.)
Basanite is a deep velvety-black
variety of
amorphous quartz, of a
slightly tougher...
- 000
years ago and
erupted picrobasalts, trachybasalts, ankaramites, and
basanites. They
reach as far as Lake
Chala and
Taveta in the
southeast and the Lengurumani...
- hotspots.
Their silica content can
range from
ultramafic (nephelinites,
basanites and tephrites) to
felsic (trachytes). They are more
likely to be generated...
- Pitrucha, Rac****; Sena,
Salvador (2011). "The late
Oligocene Cieneguilla basanites,
Santa Fe County:
Records of
early Rio
Grande rift magmatism" (PDF). New...
-
calculated for the rock
based on its
chemical composition. For example,
basanite is
distinguished from
tephrite by
having a high
normative olivine content...
- The
absence of
olivine distinguishes them from the
otherwise similar basanite. It's
parameters are
defined in the QAPF diagram.
Occurrences include leucite...
-
undifferentiated and
nonviscous basanite lavas that form the low
broad platform shield of Erebus.
Slightly younger basanite and
phonotephrite lavas crop...
-
essential plagioclase feldspar are
known as
leucite tephrites and
leucite basanites. The
former consist mainly of plagioclase,
leucite and augite,
while the...
