Paul Schiarizza's research while affiliated with Northern Arizona University and other places

Publications (20)

Technical Report
Full-text available
Upper Paleozoic to Lower Jurassic deformed rocks of the Cache Creek terrane in the Decar area, central British Columbia, include partly to completely serpentinized or carbonate-altered mantle tectonite (Trembleur ultramafite), flanked on both sides by predominantly argillaceous and siliceous fine-grained sedimentary rocks and aphanitic mafic volcan...
Article
Full-text available
The British Columbia Geological Survey (BCGS) provides digital coverage of British Columbia’s bedrock geology. The standardized stratigraphic nomenclature that BCGS uses for encoding bedrock across the province resembles that specified in the North American Stratigraphic Code and includes lithostratigraphic, lithodemic, and lithotectonic units. A s...
Article
New bedrock mapping completed as part of the Nechako NATMAP Project indicates that the area between Babine and Takla lakes in central British Columbia is underlain by rocks of the Early Permian Asitka, Late Triassic Takla, and Early to Middle Jurassic Hazelton volcanic-arc assemblages of the Stikine Terrane. These are cut by large composite stocks...
Article
The upper Middle Jurassic to Lower Cretaceous Relay Mountain Group is the lower part of the northern Tyaughton–Methow basin, southwestern British Columbia. The Relay Mountain Group consists of ~2700–3400 m of clastic rocks that we subdivide into three formal formations. The Callovian and lower Oxfordian Tyoax Pass Formation is marine shale and sand...
Article
The Johanson Lake project is a two-year bedrock mapping program initiated by the Geological Survey Branch in 2003 as part of the Toodoggone Targeted Geoscience Initiative (TGI). The project focuses on a belt
Article
Full-text available
Upper Paleozoic to Lower Jurassic oceanic rocks of the Cache Creek Terrane near Fort St. James, in central British Columbia, form a stack of thrust sheets cut by steeply dipping strike-slip faults. Paleontologically dated upper Paleozoic strata include bioclastic shallow-water limestone and ribbon chert. Isotopically dated Permian rocks consist of...
Article
New bedrock mapping completed as part of the Nechako NATMAP Project indicates that the area between Babine and Takla lakes in central British Columbia is underlain by rocks of the Early Permian Asitka, Late Triassic Takla, and Early to Middle Jurassic Hazelton volcanic-arc assemblages of the Stikine Terrane. These are cut by large composite stocks...
Article
Upper Paleozoic to Lower Jurassic oceanic rocks of the Cache Creek Terrane near Fort St. James, in central British Columbia, form a stack of thrust sheets cut by steeply dipping strike-slip faults. Paleontologically dated upper Paleozoic strata include bioclastic shallow-water limestone and ribbon chert. Isotopically dated Permian rocks consist of...
Article
Volcanogenic massive sulfide deposits of various ages, types, and geochemical affinities occur within allochthonous and para-autochthonous terranes of the Cordillera of western Canada. The terrane affiliation, age, and chemical association of volcanic rocks can be used as a guide in the exploration for volcanogenic massive sulfide mineralization. T...
Article
Using palcomagnetically derived estimates of latitudinal displacement, within the northern Cordillera we identify two major tectonic domains that were active during Late Cretaceous through Eocene time (roughly 83 to 45 Ma). At 100 to 90 Ma, the Interior Domain (comprising much of interior British Columbia, central Yukon, and eastern and central Ala...

Citations

... The Joe Mountain Formation has tentatively been assigned to Stikinia (e.g., Hart, 1997), but recent studies suggest it may be correlative with primitive arc successions assigned to the Cache Creek terrane in British Columbia (e.g., Kutcho-Nakina assemblages; Zagorevski et al., 2018;Bordet et al., 2019;Bickerton et al., 2020). Zagorevski et al. (2021) assigned these rocks to the newly defined Atlin terrane. ...
... Cathodoluminescence (CL) imaging and zircon U/Pb-Hf and trace-element analyses were completed at the Pacific Centre for Isotopic and Geochemical Research (PCIGR) at the University of British Columbia (Vancouver, British Columbia, Canada) and the Arctic Resources Laboratory (ARL) at the University of Alberta (Edmonton, Alberta, Canada). Results are in Tables S1-S6 (footnote 1), and all analytical techniques and results of data quality control samples are in appendices 3 and 5 in Ootes et al. (2020c). ...
... The core of this Intermontane terranes belt is formed by the Mesozoic rocks of Stikinia and Quesnellia, which bound the Cache Creek accretionary complex [65,74]. The Cache Creek terrane, ranging in age from Upper Palaeozoic to Lower Jurassic, is made up of a mélange of rocks formed in variegate oceanic settings (i.e., spreading ridge, atoll, oceanic plateau and trench fill: see [75]). On the other hand, Stikinia and Quesnellia are remnants of island-arcs built in the Panthalassa Ocean during the Mesozoic [76]. ...
... Along strike to the south, the Tachek pluton and Stern Creek phase of the Endako Batholith (Fig. 2) have been dated by U-Pb methods on zircon as ca. 226-219 Ma (MacIntyre et al., 2001); these Late Triassic plutons were probably emplaced into Takla volcanic centers, and thus represent a southward continuation of the arc axis. ...
... At the BCGS, we deployed the GFD model as an operational spatial database in PostgreSQL/PostGIS to update the BC digital geology (e.g., Cui et al., 2018a). We chose PostgreSQL/ PostGIS because it is open-source software and one of the first to implement the OGC simple features specification and SQL Management of External Data (SQL/MED, a part of SQL standard). ...
... Cretaceous strata are exposed as a south-dipping succession on a north-south-trending ridge ∼2 km west and north of Mount Tatlow (National Topographic System (NTS) map area 92O/05; Fig. 1), on the south side of the Konni Lake fault (see Riddell et al. 1993a, 1993b, and Friedman et al. 2005. A detailed stratigraphic section of the Mount Tatlow succession, almost 1500 m in thickness, was measured in this study and is presented in Fig. 3. Lowermost exposures of the section are found along the ridge at Universal Transverse Mercator (UTM) Zone 10U, 436885E, 5695045N; the top of the section is at UTM 436671E, 5693616N (all UTMs are in North American Datum (NAD)27). ...
... In the Dease Lake area, between the Nahlin and King Salmon faults, metabasalt and serpentinite occur as the structural base of the Cache Creek terrane and are spatially associated with Permo- Fig. 3. Composite stratigraphic section for the Cache Creek terrane, Stikinia, and Whitehorse trough in southern Yukon (modified after Hart 1997;Lowey 2004;White et al. 2012;Colpron et al. 2015;Bordet 2018 Triassic bimodal volcanic and volcaniclastic rocks of the Kutcho assemblage (Childe and Thompson 1997;Childe et al. 1998;Schiarizza 2011;Fig. 1). ...
... Volcanosedimentary strata at Kliyul consist of two units of the Takla Group volcanics, Goldway Peak (GP) and Kliyul Creek (KC) Groups. These are equivalent to the same named units in the British Columbia Geological Survey government map of the area (Schiarizza, 2004a(Schiarizza, , 2004bSchiarizza and Tan, 2005). The oldest unit is KC, which consists of four subunits: intermediate to mafic volcanics and volcanoclastics (KCv), carbonate-rich sediments and volcanics (KCc), felsic volcanics and volcanoclastics interlayered with carbonate-rich sediments (KCfc), and siliceous sediments (KCs). ...
... OIB = ocean-island basalt, IAT = island-arc tholeiite discontinuous massifs structurally lying above the Jurassic Nahlin Fault, and isolated massifs and slivers elsewhere. Previously recognized Kutcho-Sitlika-Joe Mountain arc rocks occur to the southwest of the Nahlin Fault in British Columbia and north of the Cache Creek terrane carbonate platform in Yukon (Jobin-Bevans, 1995;Hart, 1997;English et al., 2010;Schiarizza, 2012;Bickerton, 2013;Bickerton et al., 2013;Bordet, 2017Bordet, , 2018Bordet et al., 2019). These arc rocks were previously included in the Cache Creek (Kutcho-Sitlika) and Stikinia (Joe Mountain) terranes. ...
... Samples for this geochronological study of the Ootsa Lake Group were collected from representative volcanic rocks across the northern and western portions of the Nechako River map area and southern and western parts of the Fort Fraser map area along a north-south transect. At these sites the distribution and nature of volcanic rocks of the Ootsa Lake Group are well known from recent mapping (e.g., Whalen et al. 1998;MacIntyre et al. 1998;Struik et al. 1999;Anderson et al. 1998aAnderson et al. , 1999Anderson et al. , 2000. The sample set includes a representative from a related Eocene pluton in the north-central Nechako River map area (Sellwood et al. 1999). ...