 | | Journal (article/letter/editorial) | | Implication for an orogenic cycle between the Tanzania Craton and Bangweulu Block during the assembly...Implication for an orogenic cycle between the Tanzania Craton and Bangweulu Block during the assembly...Implication for an orogenic cycle between the Tanzania Craton and Bangweulu Block during the assembly...Dar es Salaam, P.O. Box 35052, Dar es Salaam, Tanzania b Kiel University, Institute of Geosciences, 24098...Ubendian Belt was followed by a collision between the Tanzania Craton and the Bangweulu Block and tectonometamorphic |  | | Journal (article/letter/editorial) | | Nephelinization involved the introduction of Na, K and Fe 3+ in an infiltrating peralkaline fluid and...Structural formulae Si A1TM AIvl Ti Fe Mn Mg Ca Na K O 6.000 0.528 0.008 1.456 0.001 4.000 1.964 0.993...fenites The Stjernoy fenite consists largely of complex, symplectitic intergrowths of vesuvianite (idocrase)...(idocrase) and alumino-pargasite in nepheline (Ne74 K s 1 2 A n l l Q3), alumino-pargasite, and two Ca-rich...Mg38 Fel2) and ferroan pargasite in nepheline (Ne72 K s l 2 An7 Q9) (Table 2). Both ferroan pargasite and |  | | Journal (article/letter/editorial) | | the Continental Crust in the Mozambique Belt of Tanzania: Combined SmāNd, RbāSr, and PbāPb Isotopic Evidence...recognized previously within the Mozambique Belt of Tanzania. Most boundaries of these age domains are overprinted...recrystallization of feldspar at 2 Ga. Granulites with Nd model ages from 1 to 1Ā·5 Ga only occur in NE Tanzania; because...ages between 2Ā·1 and 2Ā·6 Ga, and highly variable feldspar Pb isotope composition indicating possible derivation...only led to addition of new crust in the NE of Tanzania, but also reworked āCorresponding author. Present |  | | Journal (article/letter/editorial) | | collapse and escape tectonics. On the other hand, for Tanzania it can be shown that the 630 Ma high-grade metamorphism...in the south (SĆ©rie de Sahantaha) and a central region that is dominated by metagranitoids and granites...correlated with the Seychelles and the Rajasthan region of India (Fig. 1). A rhyolite of the northern area...(Plummer, 1996). Rift related volcanics give whole rock KāAr, UāPb zircon and 40Arā39Ar ages of ca. 92ā84 Ma...central as well as one sample from the northernmost region have been examined as well (Fig. 2). From two of |  | Liu, ChunāFa, Zhang, Jing, Tang, Li, Yang, Fan, Guo, JiangāTao, Zhou, Cong, Cai, ZhenāWang, Bian, XiaoāLong (2020) Detrital zircon UāPb geochronology and provenance of the Neoproterozoic Lower Roan Group, Chambishi Basin, Northāeastern Zambia: Implication for rift evolution of the Congo Craton. Geological Journal, 55 (2) 1245-1261 doi:10.1002/gj.3491 | Journal (article/letter/editorial) | | group may have been mainly the Lufubu Metamorphic Complex, Bangweulu Block, and Muva Supergroup, and minor...sedimentary rocks of the Lower Roan Group include the Tanzania Craton and the AngolaāKasai Craton. C. not only...the Lower Roan Group eny (2.05 to 1.93 Ga), the Tanzania Craton may have collided with an sediments were...were derived from the Lufubu Metamorphic Complex unknown terrane, forming the Usagaran Belt which contains...like eclogite along the southāeastern margin of Tanzania (De Waele, Robb, 2005; Master, Rainaud, Armstrong |  | | Journal (article/letter/editorial) | | granulites and pelitic migmatites from the Lokoho region, Northern Madagascar ROBERT BUCHWALDT,* ROBERT... St. Louis, Missouri 63130, U.S.A. ABSTRACT A region of metamorphosed supracrustal rocks (pelite, quartzite...various metamorphic and igneous rocks from the same region yields a Cambrian age of 510ā520 Ma for the time...and Antarctica on the east, and Somalia, Kenya, Tanzania, and Mozambique on the west in the center of the...geochronological, and mineral-chemical data from the Lokoho region, a comparatively little-studied portion of the |  | | Journal (article/letter/editorial) | | metamorphism in the Pan-African belt of eastern Tanzania: PāTāt evidence against granulite formation by...e l. d e) , A . M OĢLL E R * A N D V . S C H E N K Mineralogisch-Petrographisches Institut und Museum...belt in Tanzania, we have studied the PāT evolution of granulites from northern and eastern Tanzania representative...structures younger than those of E-W trend in the Tanzania Craton (Fig. 1), the presence of granulites in...orogenic belts around the Bangweulu Block and Tanzania Craton were initially interpreted as ensialic |  | | Journal (article/letter/editorial) | | microcontinent to have been discovered in this region, lying ~180 km to the NE of Gulden Draak Knoll;...samples suggests derivation from a felsic igneous complex. This basement is at least partly covered by Late...eclogites, blueschists, serpentinite melanges) in this region of Gondwana is so far lacking, the most compelling...geological PT E datasets in this poorly explored region, a research cruise aboard the Australian R/V Southern...Gulden Draak Knoll comprises a high-grade basement complex, including pelitic paragneiss (deposited < 1.1 |  | Cox, Grant M., Lewis, Christopher J., Collins, Alan S., Halverson, Galen P., Jourdan, Fred, Foden, John, Nettle, David, Kattan, Fayek (2012) Ediacaran terrane accretion within the ArabianāNubian Shield. Gondwana Research, 21 (2) 341-352 doi:10.1016/j.gr.2011.02.011 | Journal (article/letter/editorial) | | separated Neoproterozoic India from the CongoāTanzaniaāBangweulu Block, was one of the most extensive...collision between Neoproterozoic India and the CongoāTanzaniaāBangweulu Block (Clark et al., 2009; Collins et...and is composed of a muscoviteābiotiteāquartzā feldspar schist highlighting the greenschsist facies metamorphism...minor biotite. It is moderately rich in quartz and feldspar. Zircon grains are sub-euhedral to euhedral with...muscovite, chlorite and biotite with minor quartz and feldspar. Biotite exists in nodular pods within the schistose |  | | Journal (article/letter/editorial) | | . J OĢ N S , 1 V . S C H E N K , 1 P . A P P E L 1 A N D T . R A Z A K A M A N A N A 2 1 Institut fuĢr...pressures of 9 kbar, deduced from GASP equilibria and feldspar thermometry. In proximity to charnockite bodies...separated from each other by a 30- to 60-km-wide region, consisting of metasedimentary rocks with enclosed...correlated with the Seychelles and the Rajasthan region of India (Tucker et al., 1999a; Torsvik et al....three distinct regions (Fig. 2b). The southern region is 50ā150 km wide, extends from the area around |  | Jacob, J.-B., Martelat, J.-E., Goncalves, P., Giuliani, G., Devidal, J.-L., Feneyrol, J., Omito, E., Ichang'I, D. (2018) New P-T-X conditions for the formation of gem tsavorite garnet in the Voi area (southwestern Kenya) Lithos, 320. 250-264 doi:10.1016/j.lithos.2018.09.010 | Journal (article/letter/editorial) | | quality gemstone discovered in 1967 in northeast Tanzania (Bridges, 1974). Except a few mines in southern...mined in Tanzania and Kenya (Fig.1) (Feneyrol et al., 2013a). In IP northeastern Tanzania and southeastern...crystallisation at 605 Ā± 35 Ma in northeastern Tanzania (Feneyrol, 2012; Feneyrol et al., 2017), and at...of the tsavorite-bearing belt. In northeastern Tanzania, a petrological investigation of the tsavorite-bearing...PT Our area of interest is localised in North-Tanzania/Southern Kenya. This place is an example of a |  | Boger, S.D., Carson, C.J., Fanning, C.M., Hergt, J.M., Wilson, C.J.L., Woodhead, J.D. (2002) Pan-African intraplate deformation in the northern Prince Charles Mountains, east Antarctica. Earth and Planetary Science Letters, 195 (3) 195-210 doi:10.1016/s0012-821x(01)00587-8 | Journal (article/letter/editorial) | | Antarctic Shield demonstrate that this region consists of a complex * Corresponding author. E-mail address:...gross structural framework of the region of interest. NC = Napier Complex; VH = Vestfold Hills; RT = Ruker...(southern Prince Charles Mountains); RC = Rayner Complex; nPCMs = northern Prince Charles Mountains (study...et al. [18]. (b) Enlargement of the Radok Lake region illustrating sample localities from this study...attributed to the Neoproterozoic event from this region [20]. We present kinematic and palaeostress data |  | | Journal (article/letter/editorial) | | consists of an Archean basement (Banded Gneiss Complex ā Bundelkhand craton) ļ¬anked in the west by the...identiļ¬ed subductionāaccretion history in this region associated with various cycles of the birth and...Precambrian stratigraphic units of the Aravalli region in NW India with the present study area shown in...the high grade metamorphic orogen of Sandmata Complex with westerly dips, incorporating the Phulad ophiolites...Pisarevsky, 2005) or the remnant of extensions to the Tanzania, Dharwar or the Marwar Cratons that formed part |  | | Journal (article/letter/editorial) | | assemblages from metapelites (garnet + sillimanite + K feldspar (perthite) + graphite Ā± plagioclase + quartz...granitic orthogneiss (garnet + Fe-clinopyroxene + K feldspar + plagioclase + quartz) in the Humboldt Mountains...domains, i.e. Dronning Maud Land and Prydz bay-Denman Region Glacier has been well demonstrated in east Antarctica...dominantly made up of quartz, garnet, sillimanite, K-feldspar and small amount of biotite, graphite and plagioclase...relative proportion of plagioclase + non-perthitic K feldspar (inferred to represent melt) which is signiļ¬cantly |  | Gregory, Laura C., Meert, Joseph G., Bingen, Bernard, Pandit, Manoj K., Torsvik, Trond H. (2009) Paleomagnetism and geochronology of the Malani Igneous Suite, Northwest India: Implications for the configuration of Rodinia and the assembly of Gondwana. Precambrian Research, 170 (1) 13-26 doi:10.1016/j.precamres.2008.11.004 | Journal (article/letter/editorial) | | ā , Joseph G. Meert a , Bernard Bingen b , Manoj K. Pandit c , Trond H. Torsvik b,d,e a Department of...Precambrian stratigraphic units of the Aravalli Mountain Region in NW India with sampling area boxed (adapted from...Seychelles are sourced from the Archean Banded Gneiss Complex in Rajasthan (Ashwal et al., 2002). The majority...automorphic phenocrysts of quartz, plagioclase and K-feldspar in a microcrystalline devitriļ¬ed groundmass of...much steeper than the present-earth ļ¬eld in the region (inclination = 43.4ā¦ ). The high temperature and |  | | Journal (article/letter/editorial) | | supercontinent, most likely related to the collision of the Tanzania Craton with the Azania microcontinent subsequent...collision of the Congo Craton (i.e., the Congo/Tanzania/ Bangweulu Block of Collins & Pisarevsky, 2005)...east and west of the āāWestern Granulitesāā of Tanzania (Hauzenberger et al., 2009), and finally younger...younger clockwise whiteschist metamorphism in Tanzania (JoĢns & Schenk, 2004), pointing to a collisional...findings that India did not collide with the Congo/Tanzania/Bangweulu Block until the early Cambrian (e.g |  | Singh, Yengkhom Kesorjit, De Waele, Bert, Karmakar, Subrata, Sarkar, Sunayana, Biswal, Tapas Kumar (2010) Tectonic setting of the Balaram-Kui-Surpagla-Kengora granulites of the South Delhi Terrane of the Aravalli Mobile Belt, NW India and its implication on correlation with the East African Orogen in the Gondwana assembly. Precambrian Research, 183 (4) 669-688 doi:10.1016/j.precamres.2010.08.005 | Journal (article/letter/editorial) | | much younger than those of the Sandmata Granulite Complex of the northern part of the Aravalli Mobile Belt...extensive granulite terranes such as in the Napier Complex, Eastern Ghats Mobile Belt (Dasgupta, 1995; Mukherjee...Alps (Handy et al., 1999), Sandmata Granulite Complex of the Aravalli Mobile Belt (Guha and Bhattacharya...millions of years, such as is the case for the Napier Complex (Harley, 1985), to only a few hundred million years...granulite pockets known as the Sandmata Granulite Complex (Sharma, 1988; Deb et al., 1989; Guha and Bhattacharya |  | Dong, Xin, Zhang, Zeming, Niu, Yaoling, Tian, Zuolin, Zhang, Liangliang (2020) Reworked Precambrian metamorphic basement of the Lhasa terrane, southern Tibet: Zircon/titanite UāPb geochronology, Hf isotope and geochemistry. Precambrian Research, 336. 105496 doi:10.1016/j.precamres.2019.105496 | Journal (article/letter/editorial) | | 1866 Ma, 1343ā1250 Ma and 824 Ma from the Bomi complex in the southeastern CLT. Chen et al. (2019) suggested...eastern segment (cf. Pan et al., 2004). The Nyingchi complex in the eastern SLT has been interpreted as the...indicated that most protoliths of the Nyingchi complex included both sedimentary and magmatic rocks of...metamorphic age of ~ 600 Ma from the Nyingchi complex in the eastern SLT, with a protolith age of ~ 1780...(Bt-amp) gneisses consist of plagioclase (~30 vol%), K-feldspar (~15 vol%), quartz (~35 vol%), amphibole (~10 |  | Hirayama, Eri, Tsunogae, Toshiaki, Malaviarachchi, Sanjeewa P. K., Takamura, Yusuke, Dharmapriya, Prasanna L., Tsutsumi, Yukiyasu (2020) Prolonged Neoproterozoic highāgrade metamorphism of the Wanni Complex, Sri Lanka: New insights from petrology, phase equilibria modelling, and zircon UāPb geochronology of partially melted cordierite gneiss from Walpita. Geological Journal, 55 (9). 6147-6168 doi:10.1002/gj.3792 | Journal (article/letter/editorial) | | Neoproterozoic high-grade metamorphism of the Wanni Complex, Sri Lanka: New insights from petrology, phase...Yusuke Takamura1 Toshiaki Tsunogae1,2 | Sanjeewa P. K. Malaviarachchi3,4 | Prasanna L. Dharmapriya3 1...prograde and near-peak metamorphisms of the Wanni Complex (WC) in Sri Lanka, and investigate the pressureātemperatureā...Japan. Email: tsunogae@geol.tsukuba.ac.jp land Complex (HC). Grt-L occurs as thin layers parallel to the...John Wiley & Sons Ltd 1 2 HIRAYAMA ET AL. complex subductionācollision processes possibly controlled |  | Kuribara, Yusuke, Tsunogae, Toshiaki, Santosh, M., Takamura, Yusuke, Costa, AntĆ“nio Gilberto, RosiĆØre, Carlos A. (2019) Eoarchean to Neoproterozoic crustal evolution of the Mantiqueira and the Juiz de Fora Complexes, SE Brazil: Petrology, geochemistry, zircon U-Pb geochronology and Lu-Hf isotopes. Precambrian Research, 323. 82-101 doi:10.1016/j.precamres.2019.01.008 | Journal (article/letter/editorial) | | geochronology; Lu-Hf isotopes; Juiz de Fora Complex; Mantiqueira Complex; Kuunga Orogen 1. Introduction Recent...supercontinent is considered to have been formed by complex subduction and multiple collisional events between...geochronological data on orthogneisses of the Mantiqueira Complex indicate that their protoliths were formed by Neoarchean...al., 1998, 2010), and those of the Juiz de Fora Complex during Siderian (2427 Ma; e.g., Heilbron et al...available geochronological and isotopic data from this region, with a view to evaluate the tectonic evolution |  | Hu, Jianmin, Ren, Minghua, Zhao, Yue, Liu, Xiaochun, Chen, Hong (2016) Source region analyses of the morainal detritus from the Grove Mountains: Evidence from the subglacial geology of the EdiacaranāCambrian Prydz Belt of East Antarctica. Gondwana Research, 35. 164-179 doi:10.1016/j.gr.2015.04.010 | Journal (article/letter/editorial) | | Source region analyses of the morainal detritus from the Grove Mountains: Evidence from...Minghua, Zhao, Yue, Liu, Xiaochun, Chen, Hong, Source region analyses of the morainal detritus from the Grove...the journal pertain. ACCEPTED MANUSCRIPT Source region analyses of the morainal detritus from the Grove...the timing of geological events in the Prydz Belt region, U-Pb zircon isotopic ages are compiled in Table...the Rauer Islands, an Archean tonalitic gneiss complex was emplaced in two stages at 3470-3270 and 2850-2800 |  | | Journal (article/letter/editorial) | | shear zone in the north (K) that is continuous with the Coorg shear zone (K) in the south (Fig. 2). The...(2014) 191ā208 195 Fig. 4. (a) Structural map and (bāk) stereographic projections of planar and linear structures...the dashādot line represents the best-ļ¬t girdle. (k) Projection for the granulites in domain III showing...SāC fabrics and , ı and winged porphyroclast of feldspar indicate a dextral sense of shear on the monophase...replace coarse-grained polygonized aggregates of feldspar, and occasionally hornblende. In domain III, DM5 |  | Zhang, Zeming, Dong, Xin, Liu, Feng, Lin, Yanhao, Yan, Rong, He, Zhenyu, Santosh, M. (2012) The making of Gondwana: Discovery of 650Ma HP granulites from the North Lhasa, Tibet. Precambrian Research, 212. 107-116 doi:10.1016/j.precamres.2012.04.018 | Journal (article/letter/editorial) | | Fig. 1. Simpliļ¬ed geological map of the Tibet region (modiļ¬ed after Zhu et al., 2011a), showing the...quartzite comprises minor garnet, muscovite and K-feldspar, with the former two minerals partly replaced...37 2.10 0.46 98.35 Si Ti Al Fe3+ Fe2+ Mn Mg Ca Na K Cations 2.999 0.001 1.967 0.033 1.557 0.047 0.675...trace element diagram, they show slight enrichment of K, Rb and Ba, and depletion of Nb, Ta and Cr (Fig. 4b)...consists mainly of the HP metamorphic minerals, 0.1 Sr K Rb Ba Th Ta Nb Ce P Zr Hf Sm Ti Y Yb Sc Cr Fig. |  | | Journal (article/letter/editorial) | | Antarctica T . R O M E R , 1 K . M E Z G E R 2 A N D E . S C H M AĢ D I C K E 1 1 Geozentrum Nordbayern...crystalline complex (unit 1), the Mount Wegener nappe (unit 2) and the northern crystalline complex (unit 3)...of biotiteāplagioclase gneiss, kyaniteāgarnetāK-feldspar metapelite, hornblende gneiss, garnetāhornblende...Blackwell Publishing Ltd cooling ages obtained by KāAr dating on amphibole for ophiolites from the Herbert...garnet according to SchmaĢdicke (2000); m, matrix; k, kelyphite. TEMPERATURE AND PRESSURE CONDITIONS |  | Will, T.M., Zeh, A., Gerdes, A., Frimmel, H.E., Millar, I.L., SchmƤdicke, E. (2009) Palaeoproterozoic to Palaeozoic magmatic and metamorphic events in the Shackleton Range, East Antarctica: Constraints from zircon and monazite dating, and implications for the amalgamation of Gondwana. Precambrian Research, 172 (1) 25-45 doi:10.1016/j.precamres.2009.03.008 | Journal (article/letter/editorial) | | data, combined with published results, reveal a complex tectono-thermal history of the Shackleton Range...metagranites (Pankhurst et al., 1983) and RbāSr and K-Ar mineral cooling ages of 1650ā1550 Ma (Hofmann...Pioneers and Stratton Groups and an ophiolite complex (e.g. Clarkson et al., 1995; Talarico et al., 1999)...similar to those of the Read Group. The ophiolite complex consists of amphibolites, metagabbros and serpentinised...Ma; Zeh et al., 1999). Similar ages of 500 Ā± 10 Ma (K-Ar mica and amphibole) were determined by Talarico |
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