Publication Type:

Miscellaneous

Authors:

Lafrance, Bruno; Gibson, Harold L.; Pehrsson, Sally J.; Schetselaar, Ernst; DeWolfe, Y. Michelle; Lewis, David

Source:

A special issue on volcanogenic massive sulfide deposits of the Trans-Hudson Orogen, Economic Geology Publishing Company, Lancaster, PA, United States, Volume 111, p.849-875 (2016)

ISBN:

0361-0128

Keywords:

accretion, Archean, Canada, Canadian Shield, chemical composition, cleavage, deformation, dikes, faults, Flin Flon Belt, folds, foliation, Hudsonian Orogeny, intrusions, lineation, major elements, Manitoba, massive deposits, massive sulfide deposits, metal ores, mineral deposits, genesis, North America, overprinting, Paleoproterozoic, plate collision, plate tectonics, plutons, Precambrian, proterozoic, reactivation, reconstruction, Saskatchewan, shear zones, structural analysis, superior province, thrust faults, thrust sheets, Trace elements, upper Precambrian, Western Canada, whole rock

Abstract:

The Flin Flon mining district is part of a greenstone belt, the Flin Flon-Glennie Complex, in the Paleoproterozoic Trans-Hudson orogen. Its tectonic history began prior to 1872 Ma with the development of regional folds-the faulted F (sub 1) Burley Lake syncline and F (sub 2) Hidden Lake syncline-during D (sub 1) and D (sub 2) intraoceanic accretion of the 1888 Ma Flin Flon arc to other volcanic terranes. Amalgamation of the Flin Flon to Glennie terrane, possibly during D (sub 3) , produced a W-propagating thrust-fold belt and basins in which fluvial sedimentary rocks were deposited between 1847 Ma and 1842 Ma. As the fold-thrust belt migrated westward, these rocks were incorporated into a stack of E-dipping thrust sheets bounded by NNW-striking thrust faults (1920 fault) and internally folded by W-verging folds (Pipeline, Mud Lake, and Grant Lake synclines). Subsequent D (sub 4) collision of the Flin Flon-Glennie Complex with the Archean Sask microcontinent was broadly coeval with but outlasted the emplacement of 1840 Ma Phantom Lake dikes. D (sub 4) produced a second truncating fold-thrust system characterized by N-directed thrust faults (Club Lake and Railway faults) and E-trending folds (Flin Flon Creek syncline). These folds were overprinted by two regional cleavages, and the thrust faults were reactivated as oblique-slip shear zones, either late during the same collisional event (D (sub 5) ) or during terminal collision (D (sub 6) ) of the Sask craton and Flin Flon-Glennie Complex with the Superior craton at 1.83 to 1.79 Ga. The Flin Flon volcanogenic massive sulfide ore system was thrust-imbricated during D (sub 3) and D (sub 4) , and ore lenses were stretched parallel to a regional, SE-plunging, stretching lineation that formed during D (sub 4) and was later modified during D (sub 5)

Notes:

GeoRef, Copyright 2018, American Geological Institute.<br/>2016-070926<br/>Burley Lake Syncline<br/>Callinan Deposit<br/>Flin Flon Deposit<br/>Flin Flon mining district<br/>Glennie Complex<br/>Grant Lake Syncline<br/>Hidden Lake Syncline<br/>Mud Lake Syncline<br/>Pipeline Syncline<br/>Triple 7 Deposit