 | | Report (issue) | | of Tennessee–K no xv i lle Sc ce i en e T ec tonic s R es earc h nc Carolina Geological Society...southwestern Brushy Mountains, centralwestern North Carolina Guidebook Editors: Robert D. Hatcher, Jr....Columbia, South Carolina Carolina Geological Conultants, Inc., Columbia, South Carolina Central Savannah...Aiken, South Carolina Steve Gurley, Consulting Soil Scientist, Lincolnton, North Carolina Godfrey and...South Carolina Kubal and Furr, Greenville, South Carolina Zemex Corporation, Spruce Pine, North Carolina |  | | Report (issue) | | CAROLINA GEOLOGICAL SOCIETY OFFICERS 1959-1960 President: Owen Kingman Tennessee Copper Company Mine...Department of Geology University of South Carolina Columbia, South Carolina Secretary: E. Willard Berry Department...Department of Geology Duke University Durham North Carolina Chairman of the Membership Committee: John...Department of Geology University of North Carolina Chapel Hill, North Carolina Chairman of Program Committee:...N.C. Division of Mineral Resources Raleigh, North Carolina Field Trip Leaders: Bruce Bryant U.S. Geological |  | | Report (issue) | | CAROLINA GEOLOGICAL SOCIETY OFFICERS 1959-1960 President: Owen Kingman Tennessee Copper Company Mine...Department of Geology University of South Carolina Columbia, South Carolina Secretary: E. Willard Berry Department...Department of Geology Duke University Durham North Carolina Chairman of the Membership Committee: John...Department of Geology University of North Carolina Chapel Hill, North Carolina Chairman of Program Committee:...N.C. Division of Mineral Resources Raleigh, North Carolina Field Trip Leaders: Bruce Bryant U.S. Geological |  | | Report (issue) | | Area in the Vicinity of Adairsville, Georgia, by K. Spalvins -·-------·--------------·-----·--------...Hooke1· quad1·angle, D is the Durha1n quadrangle, K is the Kensington quadrangle. Previous Investigations...MOSHEIM - "'--- ~--- ~~--LENOIR CATHEYS -' -' BIGBY ~~-a:: RIDLEY LENOIR CRIDLEYl ~ ~ 0 0: BIGBY-...following formations: Newala, Murfreesboro, Mosheim, Lenoir (Ridley), Lebanon, Lowville, Trenton, and Maysville;...Maysville; they included the Murfreesboro, Mosheim, Lenoir (Ridley), and Lebanon within the Stones River Group |  | | Journal (article/letter/editorial) | | as well as metavolcanic rocks (e.g. Muddy, 1962; Lenoir et al., 1994; Mnali, 1999; Manya, 2012, 2014; Lawley...pre-existing Archaean crust. 121 southwest. In the north, it is overlain uncomformably by rocks of the Mesoproterozoic...Archaean Tanzania and Congo cratons (Daly, 1988; Lenoir et al., 1994; Boven et al., 1999). The geology...et al., 1956; Smirnov et al., 1973; Daly, 1988; Lenoir et al., 1994; Boniface et al., 2012, 2014). The...metamorphism that has been dated at 2100–2025 Ma (Lenoir et al., 1994). The 2.1–2.0 Ga Ubendian tectonic |  | | Journal (article/letter/editorial) | | al., submitted) as well as rejuvenated Rb/Sr and K/Ar mica ages (Gabert et al., 1974) and new metamorphic...broadly of the same age as the northwesterly to north- Figure 3. Schematic illustration of the dated...ages, between ~1.95 and ~1.0Ga, were obtained from K/Ar dating of muscovite and biotite (Gabert, 1974)...Archaean Ar/Ar ages of ~2.7Ga in the Usagaran belt north of Iringa, these authors also reported a SHRIMP...known from the Ubendian domain farther west where Lenoir et al. (1995) reported U/Pb zircon ages for granitic |  | Higgins, M.W., Atkins, R.L., Crawford, T.J., Crawford, R.F., Brooks, Rebekah, Cook, R.B. (1988) The structure, stratigraphy, tectonostratigraphy, and evolution of the southernmost part of the Appalachian Orogen. Professional Paper 1475. US Geological Survey doi:10.3133/pp1475 | Report (issue) | | resting in sharp contact upon Middle Ordovician Lenoir Limestone .......................................otherwise genetically related to a given craton) to the North American craton, whereas higher thrust sheets in...(allochthonous and unrelated to a given craton) to the North American craton. Sequences preserved in the Little...River thrust stack are allochthogenetic to the North American craton and autochthogenetic to the African...the Bill Arp sheet are allochthogenetic to the North American craton; and all of the rocks in the Rome-Kingston |  | | Journal (article/letter/editorial) | | hydrothermal minerals (e.g., adularia, biotite, K-feldspar and white mica) and mica inclusion in hydrothermal...as an entirely Paleoproterozoic Belt (Daly 1988; Lenoir et al. 1994), has been recently recognized to be...event affected only the northern parts of the belt north of a Neoproterozoic suture (Boniface et al. 2014;...mafic bands (Bt-Sil) and felsic bands (Qz-Fsp). b K-feldspar alteration of the Ikulu metapelite adjacent to...Au–Cu-bearing veins at Chemchem mine. c Epidote–K-feldspar–sericite alteration of Ikulu metapelite adjacent |  | | Journal (article/letter/editorial) | | and spatially associated with post-collisional high-K calc-alkaline granites with which they share many...Not included in this review are post-collisional K-rich granitoids from the ANS since they have been...Žin terms of SiO 2 . of penecontemporaneous high-K calc-alkaline suites. The potassic association is...hypersolvus and anhydrous granitoids, absent in high-K calc-alkaline series, and chemically by A-type granite...association, however, show variable K 2 O contents and are classified as both high-K calc-alkaline and shoshonitic |  | Lenoir, J. -L., Li�geois, J. -P., K�ster, D., Utke, A., Matheis, G., Haider, A. (1994) Origin and regional significance of late Precambrian and early Palaeozoic granitoids in the Pan-African belt of Somalia. Geologische Rundschau, 83 (3) 624-641 doi:10.1007/bf01083233 | Journal (article/letter/editorial) | | (1994) 83:624-641 © Springer-Verlag 1994 J.-L. Lenoir • D. Kfister • J.-R Li6geois • A. Utke A. Haider...Abstract Granitoids within the Precambrian basement of north-eastern and southern Somalia are subdivided on the...different assemblages. The post-kinematic assemblage in north-eastern Somalia ( ~ 630 Ma) comprises granodiorites...granodiorites and granites which belong to a medium-K calc-alkaline suite. Average initial Sr, Nd and Pb isotopic... characterized by strong juvenile input in the north, close to the A r a b i a n - Nubian Shield, whereas |  | Lenoir, J.-L., Li�geois, J.-P., K�ster, D., Utke, A., Matheis, G., Haider, A. (1994) Origin and regional significance of late Precambrian and early Palaeozoic granitoids in the Pan-African belt of Somalia. Geologische Rundschau, 83 (3) doi:10.1007/bf00194167 | Journal (article/letter/editorial) | | (1994) 83:624-641 © Springer-Verlag 1994 J.-L. Lenoir • D. Kfister • J.-R Li6geois • A. Utke A. Haider...Abstract Granitoids within the Precambrian basement of north-eastern and southern Somalia are subdivided on the...different assemblages. The post-kinematic assemblage in north-eastern Somalia ( ~ 630 Ma) comprises granodiorites...granodiorites and granites which belong to a medium-K calc-alkaline suite. Average initial Sr, Nd and Pb isotopic... characterized by strong juvenile input in the north, close to the A r a b i a n - Nubian Shield, whereas |  | Sommer, H., Kröner, A., Hauzenberger, C., Muhongo, S., Wingate, M. T. D. (2003) Metamorphic petrology and zircon geochronology of high-grade rocks from the central Mozambique Belt of Tanzania: crustal recycling of Archean and Palaeoproterozoic material during the Pan-African orogeny. Journal of Metamorphic Geology, 21 (9) 915-934 doi:10.1111/j.1525-1314.2003.00491.x | Journal (article/letter/editorial) | | during the Pan-African orogeny H . S O M M E R , 1 A . K R Ö N E R , 1 C . H A U Z E N B E R G E R , 1 * S...garnet–clinopyroxene–plagioclase–quartz–biotite–amphibole ± K-feldspar ± orthopyroxene ± oxides. Metapelites are composed...composed of garnet-biotite-plagioclase ± K-feldspar ± kyanite ⁄ sillimanite ± oxides. Estimated values...middle to upper crustal PanAfrican terranes of north-east Africa and Arabia (Arabian–Nubian shield) together...granulite facies metamorphism in the MB of eastern and north-eastern Tanzania was dated at c. 640 Ma, by using |  | | Report (issue) | | the Coastal Plain Region of South Carolina and Parts of North Carolina and Georgia by David L. Daniels...surveying in the Coastal Plain regions of North Carolina, South Carolina, and Georgia. Recently Virginia and...line dividing these two areas for eastern South Carolina is shown in figure 2, based upon well data and...Aeromagnetic map of the Coastal Plain of eastern South Carolina showing areas designated '-- ^g W^...(as little as 15 miles (24 km)), and wide in North Carolina (apparently to the shelf edge). The line |  | | Journal (article/letter/editorial) | | published hornblende 4°Ar-39Ar and K-Ar ages. The similarity of the Sm-Nd to the K-At age suggests that the closure...and an age of 695 _+4 Ma reported by Muhongo and Lenoir (1994) from the Uluguru granulites (4 in Fig. 1...from the Wami River granulites which occur to the north of Uluguru (Maboko et al., 1985) and from the Pare...than the 695 _+4 Ma age obtained by Muhongo and Lenoir (1994) from the same anortho- 0.516 • i r ...sample MORI7. They are also indistinguishable from a K - A t mean age of about 630 Ma obtained by Andriessen |  | | Journal (article/letter/editorial) | | of Palaeoproterozoic tonalites and associated high-K granites in southwestern Tanzania by partial melting...of Palaeoproterozoic tonalites and associated high-K granites in southwestern Tanzania by partial melting...of Palaeoproterozoic tonalites and associated high-K granites in southwestern Tanzania by partial melting...spatially and closely NU associated with felsic, high-K, I-type granites, some of which are gneissic and/or...largely contemporaneous with emplacement of high-K granitic gneisses at 1877±15 Ma and aplitic granites |  | | Journal (article/letter/editorial) | | e l. d e) , A . M ÖLL E R * A N D V . S C H E N K Mineralogisch-Petrographisches Institut und Museum...1994) involving the accretion of island arcs in the north (Egypt, Sudan) and the widespread formation of Pan-African...Ma (Coolen, 1980; Maboko et al., 1985; Muhongo & Lenoir, 1994). Further support for the collisional model...units and the locations of the study areas. The north-south extent of the Usagaran Belt is unknown. Occurrences... 1). The extension of the Usagaran Belt to the north as well as the location of its border against the |  | Blades, Morgan L., Collins, Alan S., Foden, John, Payne, Justin L., Xu, Xiaochen, Alemu, Tadesse, Woldetinsae, Girma, Clark, Chris, Taylor, Richard J.M. (2015) Age and hafnium isotopic evolution of the Didesa and Kemashi Domains, western Ethiopia. Precambrian Research, 270. 267-284 doi:10.1016/j.precamres.2015.09.018 | Journal (article/letter/editorial) | | dominantly juvenile Arabian-Nubian Shield in the north and the high-grade Mozambique Belt to its south...resolved, with most work so far focused in the north of the orogen (Saudi Arabia, Egypt; summarised by...in the EAO and lies between these better studied north and south regions. In fact it forms an interface...lithological and metamorphic differences. To the north lies the broadly juvenile Arabian Nubian Shield...relationship, as seen in the field. 2 – homogeneous K feldspar rich granite (E13-01), 3 – fine grained granite |  | | Journal (article/letter/editorial) | | provinces, the Kibaran Belt to the northwest and north, and the Irumide Belt to the southeast (Fig. 1)...Both the granitoids and volcanic units display high-K calc-alkaline geochemistry and this led Andersen and...(ca. 1.8 Ga) include both undeformed units to the north, and strongly deformed and folded units within the...sequences, the whole being intruded by voluminous high-K granitoids during the late-Mesoproterozoic Irumide...Irumide event itself was accompanied by widespread high-K granite magmatism between 1.05 and 1.00 Ga with minor |  | | Journal (article/letter/editorial) | | to 1800 Ma) orogeny in the north of the country (Dodson et al., 1975; Lenoir et al., 1995; Ring et al....I N T H E L I S U N G W E VA L L E Y A R E A , K I R K R A N G E , S O U T H E R N M A L AWI 2004), the...between Kasamba in the south and Likudzi in the north (Bloomfield and Garson, 1965). The highest placer...Ubendian 2200 to 1800 Ma De Waele and Mapani (2002); Lenoir (1995); Ring et al., (1997). Irumide 1050 to...NE-SW Greenschist to De Waele and Mapani (2002); Lenoir (1995); Ring et al., (1997) Southern Malawi amphibolite |  | | Report (chapter) | | and appraisal of geochronological data from the North Atlantic Igneous Province (NAIP) CAMILLA M. WILKINSON1...Hatfield Marine Science Centre, Newport, Oregon 97365, USA 3 Present address: Statoil Research Centre, Arkitekt...Washington, DC 20001, USA *Correspondence: camilla.wilkinson@noaa.gov Abstract: The North Atlantic Igneous...40Ar/39Ar and K–Ar ages presented relative to the Geological Time Scale 2012. 40Ar/39Ar and K– Ar ages have...under the terms of the CC-BY 3.0 license. The North Atlantic Igneous Province (NAIP), with its combined |  | | Journal (article/letter/editorial) | | anatectic Suqii-Wagga two-mica granite and the Guttin K-feldspar megacrystic granite, and the anorogenic Ganjii...Vienna, Austria 252 T. Kebede et al. Guttin K-feldspar megacrystic granite and the Ganjii monzogranite...suture zone, GM Ganjii monzogranite, GKM Guttin K-feldspar megacrystic granite, SW Suqii-Wagga two-mica... Kebede et al. monzogranite, and the Guttin K-feldspar megacrystic granite (Fig. 1). These granitoids...name Ujjukka granite and granodiorite Guttin K-feldspar megacrystic granite Short prismatic, transparent |  | | Journal (article/letter/editorial) | | regional UHT conditions (Figs. 1, 2A, B; Muhongo and Lenoir, 1994; Kröner, 2001; Muhongo et al., 2001; Sommer...plagioclase (Pl) – biotite (Bt) – quartz (Qtz) – K-feldspar (Kfs) magnetite (Mag) ilmenite (Ilm) rutile...pargasite CE (Leake et al., 1997; Table S5A). K-feldspar has XKfs ranging between 0.93 and 0.97 and was...plagioclase (Pl), amphibole (Am), biotite (Bt), K-feldspar (Kfs) and quartz (Qtz). Accessory minerals are...4A-C). It is often surrounded by a small rim of K-feldspar, which is rimmed by plagioclase and finally by |  | | Journal (article/letter/editorial) | | (Figure 1) (Holmes, 1951; Hepworth, 1972; Muhongo and Lenoir, 1994; Kriegsman, 1995, Muhongo, 1995). To the...in the south and the Mkata Rift Segment in the north. The Gombati Transfer Zone (GTZ) links the two rift...- 22.1 28.3 7.5 - 62.5 40.4 22.6 - 84.2 K-feldspar 0.0 0.0 - 0.2 35.7 13.5 - 63.1 15.9 0...containing thin (1 to 3 cm) alternating quartz-feldspar rich and mica-rich bands arranged parallel to...by Mruma (1989) from an area about 50 km to the north of Iringa (Figure 1). In the Iringa district, 1800 |  | Renne, Paul R., Mulcahy, Sean R., Cassata, William S., Morgan, Leah E., Kelley, Simon P., Hlusko, Leslea J., Njau, Jackson K. (2012) Retention of inherited Ar by alkali feldspar xenocrysts in a magma: Kinetic constraints from Ba zoning profiles. Geochimica et Cosmochimica Acta, 93. 129-142 doi:10.1016/j.gca.2012.06.029 | Journal (article/letter/editorial) | | com/locate/gca Retention of inherited Ar by alkali feldspar xenocrysts in a magma: Kinetic constraints from...Jackson K. Njau d,e a Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, USA Department...Science, University of California, Berkeley, CA 94720, USA c Department of Earth Sciences, The Open University...47405, USA e Human Evolution Research Center, University of California, Berkeley, CA 94720, USA b Received...geological phenomena. A key assumption is that alkali feldspar phenocrysts in magmas contain no initial radiogenic |  | | Journal (article/letter/editorial) | | mineral assemblage sillimanitegarnet/cordierite-K-feldspar. Modelling of the XMg ratios of compositionally...be formed entirely during the Paleoproterozoic (Lenoir et al., 1994; McConnell, 1969; Ring et al., 1997)...greenschist-facies overprint (Lawley et al., 2013a; Lenoir et al., 1994; Ring et al., 1997) and a second stage...metamorphism and deformation (Lawley et al., 2013b; Lenoir et al., 1994). The latter events led to orogenic...lithological groups is still enigmatic. In the north, the rocks of both groups are overlain by a Neoto |
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