Field and computer modeling studies of Appalachian cyclic carbonates

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5924224

Read, J F

Cyclic carbonates in the Cambrian of the Appalachians have been studied using field data integrated with computer modeling studies. The models incorporate 1 to 3-m.y. and 20,000 to 100,000-year low-amplitude sea level fluctuations, water depth-dependent sedimentation rates, lag time, and subsidence. The 1 to 3-m.y. sea level fluctuations are defined by Fischer plots, which are readily compared to the model output. Cycles decrease in number toward regional highs, because lower subsidence rates only allow 40 to 60% of the Milankovitch sea level fluctuations to affect the highs and highs subside lower than third-order sea levels fall, which truncate 50% of cycles. Furthermore, 2 cycles/100,000 years are deposited on the outer shelf, compared to 1 to 1.4 cycles/100,000 years on inner shelf highs. Consequently, cycles have longer average periods toward the highs.

• OSTI ID: 5924224
• Report Number(s): CONF-880301-
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
APPALACHIAN MOUNTAINS
CAMBRIAN PERIOD
CARBON COMPOUNDS
CARBONATES
COMPUTERIZED SIMULATION
CONTINENTAL MARGIN
CONTINENTAL SHELF
GEOLOGIC AGES
LEVELS
MOUNTAINS
OXYGEN COMPOUNDS
PALEOZOIC ERA
SEA LEVEL
SEDIMENTATION
SIMULATION
VARIATIONS