Each sample was slabbed to approximately one centimeter in thickness, and any visible weathering rind and/or xenolith
material was trimmed away.
Located on the eastern edge of the Front Range of the Southern Rocky Mountains, the Kelsey Lake kimberlites were discovered in 1986-87 following a period of relatively intense exploration activity in the area after an earlier accidental find of diamond in a peridotite xenolith
by a CSU graduate.
Session of Interest: Mantle-Derived Intraplate Magmas, their Xenolith
and Diamond Cargo: Processes, Timescales, and Geodynamic Implications
Crustal make-up of the northern Andes: evidence based on deep crustal xenolith
suites, Mercaderes, SW Colombia.
Objectives of this study include: 1) determining mineral composition of olivine, clinopyroxene, and orthopyroxene in the xenoliths
; 2) examining individual chemical zoning characteristics or orthopyroxene, clinopyroxene, and olivine; 3) comparing mineral chemistry and zoning differences between xenoliths
from different eruption styles; and 4) use xenolith
compositions to determine lithospheric mantle pressure and temperature.
Recent prospecting and stripping programs on the Cobalt Property have resulted in the mapping of a number of xenolith
bearing hypabbysal dyke intrusions in the Pan-Anderson Lake area.
This report presents and discusses the potential beneficiation (crushing and separating rock into valuable substances or waste by any of a variety of techniques) of the diamond bearing xenolith
from the matrix that hosts the xenolith
in a particular diamond occurrence located on the joint venture's 45 square kilometer property situated 35 km.
2006): A U-Pb study of zircons from a lower crustal granulite xenolith
of the Spanish Central system: a record of Iberian lithospheric evolution from the Neoproterozoic to the Triassic.
1999, Study of anisotropy in an olivine xenolith
using acoustic waves and neutron diffraction, Physics of the Solid Earth, Vol.
100 kilogram samples were collected representing the xenolith
, matrix and run of mill (ROM) portions of the outcropping diamond occurrence, previously identified and reported upon in April 2005.
Preliminary rock characterization studies of the three rock types imply that there is a measurable specific gravity difference between the xenolith
and matrix portion of the rock, however more work is still underway.
Corona-type aggregates that formed on xenolith
margins may be analogous to pegmatoidal "strain shadows" reported in some granitoids, which formed through the flow of intercumulus melt into low-pressure areas generated by the rotation of xenoliths
during late-magmatic deformation (Paterson and Miller 1998).