Precambrian coal or anthraxolite: A source for graphite in high-grade schists and gneisses-a reply

Journal Article · Sun Aug 01 00:00:00 EDT 1982 · Econ. Geol.; (United States)

DOI:https://doi.org/10.2113/gsecongeo.77.5.1249· OSTI ID:6042032

Mancuso, J J; Seavoy, R E

Argues that without considering data for igneous carbon (carbonatites) or for ultrahigh metamorphic calcareous gneisses such as are found in the Grenville province of North America, the conclusion that the source of carbon for vein graphite is magmatic or carbonate carbon is not justified. Points out that marbles and calc-silicate gneisses occur with the graphite-bearing granulite facies rocks in Sri Lanka. Calcite may also be seen in the veins with the graphite. Concludes that whether the graphite in epigenetic veins in high grade schists and gneisses has variable carbon isotope ratios depends on whether it was derived from organic material in carbonate or noncarbonate metasediments.

• Research Organization: Department of Geology, Bowling Green State University, Bowling Green, Ohio 43403
• OSTI ID: 6042032
• Journal Information: Econ. Geol.; (United States), Vol. 77:5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
58 GEOSCIENCES
COAL DEPOSITS
GRAPHITE
ORIGIN
CALCITE
CARBON ISOTOPES
CARBONATES
GNEISSES
ISOTOPE RATIO
MAGMA
ORGANIC MATTER
PRECAMBRIAN ERA
SCHISTS
SRI LANKA
ALKALINE EARTH METAL COMPOUNDS
ASIA
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON
CARBON COMPOUNDS
CARBONATE MINERALS
DEVELOPING COUNTRIES
ELEMENTAL MINERALS
ELEMENTS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
ISLANDS
ISOTOPES
METAMORPHIC ROCKS
MINERAL RESOURCES
MINERALS
NONMETALS
OXYGEN COMPOUNDS
RESOURCES
ROCKS
011000* - Coal
Lignite
& Peat- Reserves
Geology
& Exploration
580400 - Geochemistry- (-1989)