... volcanics in the West Pilbara granite-greenstone terrane (Whundo Group), which have juvenile Nd isotope signatures and thus may represent either a rift or island-arc succession. Basaltic rocks and minor felsic tuff were deposited in the East Pilbara granite-greenstone terrane at 3.06 Ga and possibly...

...Fig. 4. Trench section of the unconformable contact between the Purdy’s Reward conglomerate and the Whundo Group basalts. The pencil marks the point of the contact, which in this field of view formed in a localized channel. ...

.... 3130 to 3115 Ma Whundo Group to the south ( Hickman, 1997a , b ; Smith et al., 1998 ). The West Pilbara granite-greenstone terrane and the Central Pilbara tectonic zone also contain other mafic intrusions that are not coeval with the ca. 2.9 Ga layered intrusions. These include folded...

..., however. A central zone, comprising the Whundo greenstone belt (Whundo Group of the Sholl terrane) and the basement underlying the Mallina basin, is characterized by distinctly more juvenile isotopic signatures. Although lead isotope data are not available, neodymium data from felsic volcanic...

... or inferred (A) intraplate and (B) subduction-related settings described in this study. The Gadwal craton parental boninites (e.g., Manikyamba et al., 2005 ) do not plot in the same field as the Whundo-type arc-basin boninites, with which they had been originally grouped. Instead, they have much higher MgO...

... ( Smithies et al., 2005 ; Smithies and Champion, 2000 ), are equally short-lived; the longest (in the Whundo group) not exceeding 20 m.y. A similar episodicity is observed in the Zimbabwe craton ( Rollinson, 2011 ), with four short “arc” events between 2.74 and 2.62 Ga. In contrast, Phanerozoic...

...       and mafic volcanic rocks and clastic       sedimentary rocks   3020 Cleaverville Formation: Clastic   Cleaverville Formation: Clastic   sedimentary rocks and banded   sedimentary rocks and banded   iron-formation   iron-formation 3130–3115     Whundo Group: Mainly...

... on the basis of the host lithostratigraphy, as well as the inferred geodynamic setting and petrogenetic affinity (e.g.,  Lentz, 1998 ; Barrie and Hannington, 1999 ; Franklin et al., 2005 ; Galley et al., 2007). The host lithostratigraphy can be grouped into one or more of the following: (1) mafic, (2) mafic...

... Group comprises five formations (oldest to youngest): Cistern Formation, Rushall Slate, Mount Negri Volcanics, Louden Volcanics, and Kialrah Rhyolite. The Whim Creek Group ( Fig. 2 ) unconformably overlies the ca. 3120 Ma Whundo Group that is elsewhere intruded by 3093 ± 4 Ma ( Nelson, 1997...

... ) and the 3.12 Ga Whundo Group on the western edge of the Pilbara Craton ( Smithies et al., 2005b ). They differ in detail from Phanerozic arc assemblages, in particular by being less porphyritic and having a complex range of rock types in addition to the BADR series which may include boninites, high-Mg...

... 2019 a ) and include 75 localities that record Archean metamorphism, although most are Neoarchean in age, with only 10 of Mesoarchean, 12 of Paleoarchean and two of Eoarchean age. The third example in Figure 5e is from the 3.12 Ga Whundo Group (West Pilbara Terrane) ( Smithies et al. 2005 b...

... and adakites: are they both slab melts? Lithos , 80 : 33 – 44 . Cousens B. Facey K. Falck H. 2002 . Geochemistry of the late Archean Banting Group, Yellowknife greenstone belt, Slave Province, Canada: simultaneous melting of the upper mantle and juvenile mafic crust . Canadian Journal...

... basalts, but Nb 6.3–18 ppm in the studied samples, both basalt groups qualify as NEB, and notwithstanding the compositional gap, both plot collinearly on binary diagrams; accordingly, the “normal” NEB are considered as fractionation products of the high-Mg basalts now termed magnesian-NEB (M-NEB) ( Fig. 5...

... thickness of rocks of the Mosquito Creek belt to be ~5,000 m, although he acknowledged the difficulties in this estimation due to tectonic thickening from isoclinal folding. Along the northern margin of the belt, the base of the Mosquito Creek Formation lies unconformably in the Warrawoona Group...

... 373 Major and trace element composition of copiapite-group minerals and coexisting water from the Richmond mine, Iron Mountain, California— Heather E. Jamieson, Clare Robinson, Charles N. Alpers, R. Blaine McCleskey, D. Kirk Nordstrom, and Ronald C. Peterson 387 Secondary sulfate minerals...

... km-thick volcano-sedimentary successions of the ca . 3.53 to 3.17 Ga Pilbara Supergroup, itself comprising four autochthonous groups: the Warrawoona, Kelly, Sulphur Springs, and Soanesville groups ( Hickman, 2012 ; Van Kranendonk et al., 2007a ; Van Kranendonk et al., 2007b ). The stratigraphic...