lab features a newly acquired Linkham THMSG 600 computer-controlled heating-freezing stage on a modified Olympus BX51 microscope. We also have a Fluid INC gas-flow stage for analysis of fluid inclusions from-198° to +700°C, including CCTV monitoring and recording of fluid inclusion phase equilibria.
Using funds from NSF-EAR and campus
matching contributions, we recently purchased two Finnigan Delta-Plus
gas source mass spectrometers. Following laboratory renovations, the instruments
are now installed and generating data. One instrument is equipped for
on-line, continuous flow isotopic analysis via gas chromatography and
a Carlo Erba elemental analyzer. We also have a second elemental analyzer
for high temperature pyrolysis (TC-EA), which expands the range of on-line
capabilities to include such things as oxygen in sulfate and phosphate.
The dedicated continuous flow instrument, a Delta-Plus XL, is also configured
for hydrogen analysis. The second instrumentóa Delta-Plus with
a dual inletóis dedicated largely to a new Kiel III device for
automated C and O isotope analysis of small carbonate samples via individual
acidification. Collectively, these mass spectrometers are used routinely
for analyses of C, O, H and N isotopes. A technician assists with daily
operations of the lab.
Vacuum lines for preparation of carbonates, silicates, sulfides, sulfates,
hydrous minerals and waters for the analysis of C, O, H and S isotopes
are also available in the department.
Among the more than 100,000 specimens
in the museum are: the invertebrate collections, which are rich in fossils
of Devonian, Mississippian and Pennsylvanian rocks of Missouri and the
midcontinent; the vertebrate collections, largely of Pleistocene mammals;
the collection of conodonts, the most varied and complete of its kind
in the world; the collections of fossil Charophytes, representing all
known localities in North America and containing reference material from
South America, Europe, Asia and Africa. The paleontologic collections
of the Missouri Geological Survey also are located in the museum.
The mineral collections contain one
of the most complete aggregates of materials from the famous Crestmore
locality in California, many of them in crystal form; one of the finest
collections of boron minerals in this country, a fine set of garnets,
and many excellent crystals from the lead and zinc mines of southwest
and southeast Missouri.
More than 1,800 species are represented
in the Dana Collection. The DeMuth Collection contains fine specimens
of polished fossil woods. For more information call (573) 882-6785.