|Title||Geologic setting and tectonic evolution of Eagle Plain Basin, northern Yukon, Canada: Implications for petroleum potential|
|Author||Hannigan, P K;
Lane, L S|
|Source||GAC-MAC-CSPG-CSSS Joint Meeting, Abstracts vol. 39, 2016 p. 32-33 Open Access|
|Links||Online - En ligne|
|Alt Series||Earth Sciences Sector, Contribution Series 20150425|
|Publisher||Geological Association of Canada|
|Meeting||GAC-MAC 2016 Annual Conference; Whitehorse, YT; CA; June 1- 3, 2016|
|NTS||106E; 106L; 116H; 116I|
|Lat/Long WENS||-138.0000 -134.0000 67.0000 65.0000|
|Subjects||general geology; tectonics; petroleum; petroleum exploration; petroleum generation; petroleum resources; structural analysis; structural basins; Cordilleran Orogenic system; Permian; Carboniferous;
|Program||Geoscience for New Energy Supply (GNES) Frontier basin analysis|
Eagle Plain in northern Yukon is underlain by an intermontane petroliferous sedimentary basin that has been shaped by multiple tectonic events throughout its Phanerozoic history.
These eventsintimately affected the generation, migration and distribution of petroleum accumulations in the basin. Major advances in understanding the basin's structural evolution provided impetus for the Geological Survey of Canada to re-evaluate
the petroleum potential of the basin incorporating newly-identified exploration play concepts. All discoveries to date are located in southern Eagle Plain and were drilled on large Laramide surface structures.Eagle Plain is located within the
ordilleran Orogenic system of northern Canada characterized by marked crustal instability. Angular unconformities, diverse structural trends, fold bundles, and extension, contraction and transcurrent faults are common features of the region. During
Late Devonian time, south-directed Ellesmerian tectonism affected the region. Broad east-west trending open folds are preserved in the subsurface of northeastern Eagle Plain Basin. In the basin, a major northeast-southwest feature called Eagle Arch,
a pre-Mesozoic upwarp of Paleozoic strata, marks the northern limit of erosional edges of various Upper Paleozoic successions. The Arch was active during Late Carboniferous to Early Permian time resulting in erosion of the Carboniferous succession to
the north. Early Permian Arch movement uplifted northern Eagle Plain
resulting in bevelling of underlying Paleozoic strata beneath the sub-Mesozoic unconformity. Early stages of the Cordilleran orogenesis produced Jurassic and Cretaceous mountain
ranges to the south of Eagle Plain region. These ranges were the source areas for clastic debris that shed northward into the foredeep region through Late Cretaceous time. Broad north-trending folds detached by décollements within the Proterozoic
succession were formed in Eagle Plain. To the west, more intense deformation produced mainly thrust faults.
In northeastern Eagle Plain, Laramide thrusting and folding of Mesozoic strata form Tertiary triangle zones marginal to the basin.
Stratigraphic and combination traps are also present in Eagle Plain. These trap configurations include updip basinward facies changes, subcrops of Upper Paleozoic reservoirs beneath the sub-Cretaceous unconformity and carbonate-to-shale facies
changes in Lower Paleozoic strata. The probabilistic assessment of total oil and gas potential (discovered and undiscovered) for all Phanerozoic sedimentary strata in the basin is 52.2*106 m3 (329 MMBO) of oil and 96.7*109 m3 (3.4 Tcf) of gas
(in-place mean volumes).
|Summary||(Plain Language Summary, not published)|
A comprehensive petroleum resource potential study has been completed in Eagle Plain Basin of northern Yukon. Sufficient data was available in the
majority of 21 defined plays established throughout the stratigraphic column from Ordovician to Cretaceous age to predict their oil and gas endowment. The probabilistic assessment of total oil and gas potential (discovered and undiscovered) for all
Phanerozoic sedimentary strata in Eagle Plain and its environs is 52.2 million cubic metres (329 MMBO) of oil and 96.7 billion cubic metres (3.4 Tcf) of gas (in-place mean volumes). Major advances in defining the basin's structural evolution have
identified new and untested conceptual exploration petroleum plays in the area. These new play concepts with their predicted volumes provide important information for stakeholders involved in evaluating land-use issues and for petroleum industry
companies in pursuing future exploration opportunities