Academic literature on the topic 'Archaean'

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Journal articles on the topic "Archaean"

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Sleep, Norman H. "Archaean palaeosols and Archaean air." Nature 432, no. 7016 (November 2004): 1. http://dx.doi.org/10.1038/nature03167.

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Ohmoto, Hiroshi, and Yumiko Watanabe. "Archaean palaeosols and Archaean air (reply)." Nature 432, no. 7016 (November 2004): 1–2. http://dx.doi.org/10.1038/nature03168.

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Sandaa, Ruth-Anne, Øivind Enger, and Vigdis Torsvik. "Abundance and Diversity of Archaea in Heavy-Metal-Contaminated Soils." Applied and Environmental Microbiology 65, no. 8 (August 1, 1999): 3293–97. http://dx.doi.org/10.1128/aem.65.8.3293-3297.1999.

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ABSTRACT The impact of heavy-metal contamination on archaean communities was studied in soils amended with sewage sludge contaminated with heavy metals to varying extents. Fluorescent in situ hybridization showed a decrease in the percentage of Archaea from 1.3% ± 0.3% of 4′,6-diamidino-2-phenylindole-stained cells in untreated soil to below the detection limit in soils amended with heavy metals. A comparison of the archaean communities of the different plots by denaturing gradient gel electrophoresis revealed differences in the structure of the archaean communities in soils with increasing heavy-metal contamination. Analysis of cloned 16S ribosomal DNA showed close similarities to a unique and globally distributed lineage of the kingdom Crenarchaeota that is phylogenetically distinct from currently characterized crenarchaeotal species.
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Herzberg, Claude. "Archaean drips." Nature Geoscience 7, no. 1 (December 1, 2013): 7–8. http://dx.doi.org/10.1038/ngeo2033.

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WINDLEY, B. "Archaean Geochemistry." Earth-Science Reviews 24, no. 1 (March 1987): 67. http://dx.doi.org/10.1016/0012-8252(87)90051-1.

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Imachi, Hiroyuki, Masaru K. Nobu, Nozomi Nakahara, Yuki Morono, Miyuki Ogawara, Yoshihiro Takaki, Yoshinori Takano, et al. "Isolation of an archaeon at the prokaryote–eukaryote interface." Nature 577, no. 7791 (January 15, 2020): 519–25. http://dx.doi.org/10.1038/s41586-019-1916-6.

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Abstract The origin of eukaryotes remains unclear1–4. Current data suggest that eukaryotes may have emerged from an archaeal lineage known as ‘Asgard’ archaea5,6. Despite the eukaryote-like genomic features that are found in these archaea, the evolutionary transition from archaea to eukaryotes remains unclear, owing to the lack of cultured representatives and corresponding physiological insights. Here we report the decade-long isolation of an Asgard archaeon related to Lokiarchaeota from deep marine sediment. The archaeon—‘Candidatus Prometheoarchaeum syntrophicum’ strain MK-D1—is an anaerobic, extremely slow-growing, small coccus (around 550 nm in diameter) that degrades amino acids through syntrophy. Although eukaryote-like intracellular complexes have been proposed for Asgard archaea6, the isolate has no visible organelle-like structure. Instead, Ca. P. syntrophicum is morphologically complex and has unique protrusions that are long and often branching. On the basis of the available data obtained from cultivation and genomics, and reasoned interpretations of the existing literature, we propose a hypothetical model for eukaryogenesis, termed the entangle–engulf–endogenize (also known as E3) model.
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Cockell, Charles S. "Photobiological uncertainties in the Archaean and post-Archaean world." International Journal of Astrobiology 1, no. 1 (January 2002): 31–38. http://dx.doi.org/10.1017/s1473550402001003.

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The notion that ultraviolet (UV) fluxes, and thus biologically weighted irradiances, were higher on Archaean Earth than on present-day Earth has been a pervasive influence on thinking concerning the nature of early Earth. It directly influences calculations concerning protection strategies that may or may not have been required by early life. Our knowledge of the Earth's changing UV radiation climate over time depends upon our knowledge of a diversity of factors, the magnitudes of which are uncertain. Here these uncertainties are explored. During the Archaean Era, calculations of the surface photobiological environment span a three order of magnitude difference in DNA-damage weighted irradiances with consequences for our assumptions concerning the environment for exposed surface life and the role of UV radiation as a mutagen. These differences are primarily caused by uncertainties in the concentrations of trace gases and the partial pressures of carbon dioxide and nitrogen that affect scattering in the atmosphere. To a lesser extent, the luminosity of the Sun in the UV region is also a factor. During the Proterozoic and Phanerozoic, when we know that an ozone column existed, these uncertainties drop to two orders of magnitude and are primarily caused by poor knowledge about the frequency and atmospheric effects of potentially ozone-depleting agents such as volcanism, impact events and supernovae explosions as well as the effects of global temperatures on ozone concentrations and thus surface UV irradiance. Changes in other atmospheric constituents during this time have less of an effect on photobiological consequences, which include a Palaeozoic oxygen pulse. Understanding the cause of photobiological uncertainties and their consequences constitutes a current challenge for atmospheric chemists and photobiologists.
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Hattori, Keiko, and Eion M. Cameron. "Archaean magmatic sulphate." Nature 319, no. 6048 (January 1986): 45–47. http://dx.doi.org/10.1038/319045a0.

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Rollinson, Hugh, and Martin Whitehouse. "Archaean crustal evolution." Precambrian Research 112, no. 1-2 (November 2001): 1–3. http://dx.doi.org/10.1016/s0301-9268(01)00167-x.

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Chin, G. J. "MICROBIOLOGY: Archaean Viruses." Science 294, no. 5544 (November 2, 2001): 959e—961. http://dx.doi.org/10.1126/science.294.5544.959e.

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Dissertations / Theses on the topic "Archaean"

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Brown, Isobel Julia. "Geology and geochemistry of Archaean gold mineralization, Arcturus District, Zimbabwe." Thesis, Oxford Brookes University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.290402.

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Dougherty-Page, Jon Stanley. "The evolution of the Archaean continental crust of Northern Zimbabwe." Thesis, Open University, 1994. http://oro.open.ac.uk/54877/.

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Granitoid clasts preserved in Late Archaean conglomerates indicate the presence of continental crust in Northern Zimbabwe prior to the ≈ 2.7 to ≈ 2.6Ga "event" which terminated with the stabilisation of the Zimbabwe Craton. The "Kober Technique" (Kober, 1986, 1987) of direct thermal ionisation of zircons has been set up in order to investigate the geochronological record preserved in such clasts. Conglomerates were sampled from two localities, Shamva, within the central part of Northern Zimbabwe, and Chinhoyi, at the north-western boundary of the craton. The results from both localities demonstrate the presence of continental crust in Northern Zimbabwe with a long and complex history prior to the Late Archaean "event". The minimum age of continental crust in the Shamva region is 3.34 Ga (Sm-Nd model age),with further episodes of granitiod intrusion indicated by zircon crystallisation at 3/197 ± 10 Ma, 2,925 ± 10 Ma, and 2,800 ± 20 Ma (Pb-Pb zircon). The Chinhoyi region has a shorter, simpler history, with the earliest recorded continental crust at 2,875 ± 3 Ma and later intrusions of granitoids at 2/800 ± 20 Ma, and2,720 ± 6 Ma (Pb-Pb zircon). Chemically, the early crust was dominated by sodic, Tonalite Trondhjemite-Granodiorite granitoids, whose formation may be modelled by the partial melting of metabasalts with residual hornblende and/or garnet. By contrast, the granitoids formed during the Late Archaean "event" which culminated in the stabilisation of the craton, dominantly follow calc-alkalinetrends, and their formation may be modelled by the fractionation of basaltic magmas (combined with assimilation- of pre-existing continental material) or intra-crustal remelting. This major switch in the origins (and hence chemistry) of granitoids may be attributed to mantle plume activity, the onset of which is recorded by the presence of greens tone belt volcanics derived from anomalously hot mantle, dated at' 2,713 ± 15 Ma (U-Pb zircon Jelsma, 1993).
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Robertson, S. "Late Archaean crustal evolution in the Ivisartoq region, southern west Greenland." Thesis, University of Exeter, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353048.

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Opiyo-Akech, Norbert. "Geology and geochemistry of the late Archaean greenstone associations, Maseno area, Kenya." Thesis, University of Leicester, 1988. http://hdl.handle.net/2381/35080.

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The greenstone belt of Kenya is an extension of what is commonly referred to as the Tanganyika "Shield". The two supracrustal sequences recognized in Kenya are the Nyanzian and the Kavirondian. The rocks found in these sequences are diverse, with dominant volcanics in the Nyanzian, whereas the Kavirondian is predominantly sedimentary. The Nyanzian lavas represent a diverse range from basalts and basaltic andesites, through andesites and dacites to rhyolites. From geochemical studies the basalts and basaltic andesites are tholeiitic, whereas the andesites, dacites and rhyolites are calc-alkaline. The sedimentary sequence ranges from mudstone, through shales, sandstones and grits to conglomerates. The plutonic rocks range in composition from gabbro to true granites, but tonalite is the dominant rock type. The chemical differences between the tholeiitic basalts and the calc-alkaline andesitic to rhyolitic sequences suggests that these volcanic suites are derived from different sources and/or through different processes. The granitoids have close chemical similarities with the silicic volcanics. From the geochemical and field relationships, the Nyanzian and Kavirondian sequences are considered to have developed on a continental segment which had not yet attained full stability. The model employed for the generation of these volcanics considers the basalts to have been generated in a region undergoing extension, similar to that of a modern back-arc environment, whereas the calc-alkaline sequences, including the granitoids, are broadly comparable with those found in present day continental arc environments.
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Carles, Patricia 1975. "Constraints on the genesis of the Archaean Troilus gold-copper deposit, Quebec." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31204.

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The Troilus gold-copper deposit lies within the northeastern part of the Archaean Frotet-Evans greenstone belt, in the Opatica sub-province of the Superior Province, northern Quebec, and contains total reserves of 51 Mt at 1.08 g/t gold, 0.11% copper, and 1.4 g/t silver. The largest orebody, Zone 87, has been mined by open pit methods since 1993.
Rocks of the Troilus domain include a coarse- to medium-grained metadiorite, a finer-grained amphibolite, a rock with a brecciated texture and felsic dykes, which crosscut the metadioritic pluton, the amphibolite and the breccia. The amphibolite, breccia, and felsic dykes all locally host ore.
Previous researchers have proposed a porphyry-type model for the genesis of the Troilus deposit. However, evidence that the breccia unit is not hydrothermal but a product of magma mixing, that the felsic dykes predate mineralization, and that mineralization and associated alteration occurred as two discrete events separated by a major episode of regional metamorphism (amphibolite facies), requires that alternative genetic models for the deposit be considered, such as orogenic gold model. (Abstract shortened by UMI.)
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Horstwood, Matthew Simon Anthony. "Stratigraphy, geochemistry and zircon geochronology of the Midlands Greenstone Belt, Zimbabwe." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246222.

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Lane, Monica Leonie. "Nickel sulphide mineralization associated with Archean komatiites." Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005594.

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The distribution of Archean Nickel sulphide deposits reflects tectonic controls operating during the evolution of the granitoid greenstone terrains. Important deposits of komatiitic-affinity are concentrated within, and adjacent to, younger (∼2.7 Ga), rift-related greenstone belts (e.g. Canada, Western Australia and Zimababwe). Two important classes of Archean Nickel sulphide deposits exist, formerly known as "Dunitic" and "Peridotitic", these are now referred to as Group I and Group II deposits, based on their characteristic structure and composition. Mineralization varies from massive and matrix to disseminated, and is nearly always concentrated at the base of the host unit. Primary ores have a relatively simple mineralogy, dominated by pyrrhotite-pentlandite-pyrite, and to a lesser degree millerite. Metamorphic grades tend to range from prehnite-pumpellyite facies through to lower and upper amphibolite facies. Genesis of Group I and II deposits is explained by the eruption of komatiites into rift-phase greenstone belts, as channelized flows, which assimilated variable amounts of footwall rocks during emplacement. Sulphide saturation was dependent on the mode of emplacement and, the amount of sulphidic sediments that became assimilated prior to crystallization. This possibly accounts for variations in ore tenor. The Six Mile Deposit (SMD) in Western Australia, is an adcumulate body of the Group IIB-type, exhibiting disseminated mineralization. The ore has been "upgraded" due to hydration and serpentinization. A profound weathering sequence exists, which was subsequently utilized during initial exploration. Exploration techniques has been focused on Western Australia, as it is here that the most innovative ideas have emerged.
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Stubbs, Heather M. "The geochemistry and petrogenesis of Archaean and paleoproterozoic dykes and sills of Zimbabwe." Thesis, University of Portsmouth, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440491.

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Wightman, R. T. "Constraints on crustal development and tectonics in the Archaean rocks of south India." Thesis, Open University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374494.

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Taylor, Jeanne. "The anatectic history of Archaean metasedimentary granulites from the Ancient Gneiss Complex, Swaziland." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/20311.

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Thesis (DSc)--Stellenbosch University, 2012
ENGLISH ABSTRACT: This study is an investigation of the anatectic history of high-grade paragneisses from the Ancient Gneiss Complex (AGC) in Swaziland. The work involved an integrated field, metamorphic, geochemical, geochronological and structural study of metasedimentary granulites from three separate, but spatially related areas of outcrop in south-central Swaziland, which were subjected to multiple high-grade partial melting events throughout the Meso- to Neoarchaean. The project has aimed to constrain the age(s) and conditions of metamorphism, so as to contribute to the understanding of geodynamic processes in the Barberton and AGC granite-greenstone terranes, as well as to investigate certain physical and chemical aspects of anatexis in the migmatites. The metamorphic record retained in these rocks, constrained by phase equilibria modelling as well as zircon and monazite SHRIMP and LA-ICP-MS geochronology, informs on the state of the mid- to lower-crust of the southeastern Kaapvaal Craton during key events associated with early lithosphere assembly and crustal differentiation. It also suggests that the region is comprised of more than one high-grade terrane. Two of the areas investigated experienced high-temperature metamorphism at ca. 3.23-3.21 Ga, in addition to a major 830-875º C, 6.5-7.6 kbar anatectic event at ca. 3.11-3.07 Ga. Intermediate and younger high-temperature events are recorded at ca. 3.18 Ga, ca. 3.16 Ga and 2.99 Ga. The timing of these metamorphic events coincided with the amalgamation of the eastern domain of the proto-Craton via subduction and accretion of micro-continental fragments at ca. 3.23 Ga, including the Barberton Greenstone Belt (BGB) and AGC terranes, as well as discrete episodes of crustal differentiation and potassic granitic magmatism between ca. 3.23 and 3.10 Ga. The third area investigated holds no record of Mesoarchaean metamorphism, but instead experienced a 830- 855 ºC, 4.4-6.4 kbar partial melting episode at ca. 2.73 Ga. This broadly coincided with the formation of a large continental flood basalt province, the ca. 2.71 Ga Ventersdorp LIP, and widespread intracratonic granitic magmatism on the Craton towards the end of the Neoarchaean. An explanation for the contrast in metamorphic record in the two terranes may be that the 2.71 Ga granulites represent a much younger sedimentary succession, and that granulites from the older terrane were left too restitic, after substantial partial melting during the Mesoarchaean, to record subsequent high-grade events. Finally, this study documents the details of S-type granitic magma production and extraction from a typical metapelitic source. Using the 2.73 Ga granulites from the AGC as a natural field laboratory, a case is made for the selective entrainment of peritectic garnet to the magma as a mechanism for generating relatively mafic, peraluminous S-type granite compositions. The work demonstrates the evolution of entrained peritectic garnet in such magmas, and is in strong support of a ‘peritectic phase entrainment’ process by which relatively mafic granite magmas are produced from melts which, in theory, should be highly leucocratic.
AFRIKAANSE OPSOMMING: Hierdie studie ondersoek die anatektiese geskiedenis van hoëgraadse metasedimentêre gneise uit die Ancient Gneiss Complex (AGC) in Swaziland. Die werk behels 'n geïntegreerde veld, metamorfiese, geochemiese, geochronologiese en strukturele studie van metasedimentêre granuliete van drie afsonderlike, maar ruimtelik verwante gebiede in suid-sentraal Swaziland, wat aan verskeie hoëgraadse anatektiese gebeure onderworpe was gedurende die Meso-tot Neoargeïese tydsperiode. Die studie is daarop gemik om die ouderdomme en die kondisies van metamorfose vas te stel, om sodoende by te dra tot die begrip van die geodinamiese prosesse in die Barberton en AGC granietgroensteen terrein, asook om sekere fisiese en chemiese aspekte van die anatektiese proses te ondersoek. Die metamorfe rekord, bepaal deur mineraal ewewigsmodellering sowel as sirkoon en monasiet SHRIMP en LA-ICP-MS geochronologie, belig die toestand van die middel-tot laer-kors van die suidoostelike Kaapvaal Kraton tydens vroeë litosfeer samesmelting en differensiasie. Dit stel ook voor dat die streek uit meer as een hoëgraadse terrein bestaan. Twee van die gebiede het hoë-temperatuur metamorfose by 3.23-3.21 Ga ervaar, asook 'n hoof 830-875 ° C, 6.5-7.6 kbar anatektiese gebeurtenis by 3.11-3.07 Ga. Intermediêre en jonger hoë-temperatuur gebeure was ook by 3.18 Ga, 3.16 Ga en 2.99 Ga geregistreer. Die metamorfose van die gebied stem ooreen met die samesmelting van die oos Kaapvaal Kraton domein deur subduksie en aanwas van mikro-kontinente by 3.23 Ga, insluitend die Barberton en AGC terreine, asook diskrete episodes van kors differensiasie en kalium-ryke graniet magmatisme tussen 3.23 en 3.10 Ga. Die derde gebied hou geen rekord van Mesoargeïkum metamorfose nie. In plaas daarvan het dit 'n 830-855 ° C, 4.4-6.4 kbar anatektiese episode by 2.73 Ga ervaar, wat ooreenstem met die vorming van 'n groot kontinentale vloedbasalt provinsie, die 2.71 Ga Ventersdorp Supergroep, en wydverspreide intrakratoniese graniet magmatisme teen die einde van die Neoargeïkum. 'n Moontlike verduideliking vir die kontras in metamorfe rekord in die twee terreine mag wees dat die 2.71 Ga granuliete 'n jonger sedimentêre afsetting verteenwoordig, en dat granuliete van die ouer terrein te restieties gelaat was na aansienlike anateksis in die Mesoargeïkum, om daaropvolgende hoëgraadse gebeure te registreer. Ten slotte, hierdie studie dokumenteer die besonderhede van S-tipe graniet magma produksie en ontginning van 'n tipiese metasedimentêre bron. Die 2.73 Ga granuliete word gebruik as 'n natuurlike veld laboratorium om die selektiewe optel-en-meevoering van peritektiese granaat tot die magma te ondersoek. Die werk toon die evolusie van peritektiese granate in sulke magmas aan, en ondersteun lewering van relatiewe mafiese graniet magmas deur 'n ‘peritektiese fase optel-en-meevoerings’ proses.
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Books on the topic "Archaean"

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Phillips, G. Neil. Archaean gold deposits of Australia. Johannesburg: University of the Witwatersrand, 1985.

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Kerrich, R. Archaean lode gold deposits of Canada. Johannesburg: University of the Witwatersrand, 1986.

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Kerrich, R. Archaean lode gold deposits of Canada. Johannesburg: University of the Witwatersrand, 1986.

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Hölttä, Pentti. The Archaean of the Karelia Province in Finland. Espoo: Geological Survey of Finland, 2012.

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The young earth: An introduction to Archaean geology. Boston: Allen & Unwin, 1987.

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International Archaean Symposium (3rd 1990 Perth, W. A.). Third International Archaean Symposium, Perth, 1990: Excursion guidebook. Nedlands, Western Australia: Geology Department (Key Centre) & University Extension, The University of Western Australia, 1990.

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N, Kazakov A., ed. Struktura arkheĭskikh zelenokamennykh poi͡asov. Leningrad: "Nauka," Leningradskoe otd-nie, 1988.

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S, Myers J., and Geological Survey of Western Australia., eds. Archaean geology of the Mount Narryer region, Western Australia. Perth: Department of Mines, Western Australia, 1987.

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Meyer, Michael. The origin of gold in Archaean epigenetic gold deposits. Johannesburg: University of the Witwatersrand, 1985.

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International Archaean Symposium (3rd 1990 Perth, W. A.). Third International Archaean Symposium, Perth, 1990: Extended abstracts volume. Perth, Western Australia: Geoconferences (W.A.), 1990.

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Book chapters on the topic "Archaean"

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Nisbet, E. G. "Archaean continents." In The Young Earth, 146–97. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-011-6489-4_5.

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Nisbet, E. G. "Archaean volcanism." In The Young Earth, 198–248. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-011-6489-4_6.

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Cattell, A. C., and R. N. Taylor. "Archaean basic magmas." In Early Precambrian Basic Magmatism, 11–39. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0399-9_2.

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Nisbet, E. G. "The Archaean planet." In Living Earth, 47–64. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3056-1_3.

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Westall, Frances. "Early Archaean Life." In Cellular Origin and Life in Extreme Habitats and Astrobiology, 239–44. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-007-1003-0_50.

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Nisbet, E. G. "The Archaean planet." In Living Earth, 47–64. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-5965-4_3.

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Groves, D. I., and R. P. Foster. "Archaean lode gold deposits." In Gold metallogeny and exploration, 63–103. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4613-0497-5_3.

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Henderson-Sellers, A. "Archaean Atmosphere-Biosphere Interactions." In Climate and Geo-Sciences, 21–38. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2446-8_2.

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Groves, D. I., and R. P. Foster. "Archaean lode gold deposits." In Gold Metallogeny and Exploration, 63–103. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2128-6_3.

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Valdiya, K. S. "Archaean Craton: Southern India." In Society of Earth Scientists Series, 31–74. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-25029-8_3.

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Conference papers on the topic "Archaean"

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Astafieva, Marina M., Richard B. Hoover, Alexei Yu Rozanov, and Alexander B. Vrevskiy. "Fossil microorganisms in the Archaean." In SPIE Optics + Photonics, edited by Richard B. Hoover, Gilbert V. Levin, and Alexei Y. Rozanov. SPIE, 2006. http://dx.doi.org/10.1117/12.681660.

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Astafieva, M. M., R. B. Hoover, A. Y. Rozanov, and A. B. Vrevskiy. "Fossil microorganisms in Archaean deposits of Northern Karelia." In Optics & Photonics 2005, edited by Richard B. Hoover, Gilbert V. Levin, Alexei Y. Rozanov, and G. Randall Gladstone. SPIE, 2005. http://dx.doi.org/10.1117/12.646847.

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Klöcking, Marthe, Karol Czarnota, Ian Campbell, Hugh Smithies, David Champion, and D. Rhodri Davies. "Archaean basalts record evidence of lithospheric extension prior to cratonisation." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6551.

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Durgalakshmi, Durgalakshmi, Ian Williams, and Sajeev Krishnan. "Petrogenesis and evolution of charnockites formed at the Archaean-Proterozoic boundary." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.9850.

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Geerthsen, K. "Geophysical Contributions To Exploration For Gold In The Archaean Of Tanzania, East Africa." In 5th SAGA Biennial Conference and Exhibition. European Association of Geoscientists & Engineers, 1997. http://dx.doi.org/10.3997/2214-4609-pdb.223.001.

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Geerthsen, Karen, and Michael John Maher. "Gravity signature of an Archaean craton/proterozoic mobile belt transition in Southern Africa." In SEG Technical Program Expanded Abstracts 1990. Society of Exploration Geophysicists, 1990. http://dx.doi.org/10.1190/1.1890281.

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T. Ranganai, R., C. J. Ebinger, K. A. Whaler, and G. W. Stuart. "Crustal Structure of the South-Central Zimbabwe Archaean Craton from Gravity and Aeromagnetic Data." In 57th EAEG Meeting. Netherlands: EAGE Publications BV, 1995. http://dx.doi.org/10.3997/2214-4609.201409309.

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Ravindran, Arathy, Klaus Mezger, and Balakrishnan Srinivasan. "Composition of the Archaean Mantle and Continental Crust in the Western Dharwar Craton, India." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2175.

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Sebastian, Sibin, Rajneesh Bhutani, and Srinivasan Balakrishnan. "Crustal Reworking in the Archaean: Geochemical Evidences from Granitoid of the Western Dharwar Craton." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2330.

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Cole, J., and M. Havenga. "Magnetic modelling of Archaean basement material southeast of Boshof, Free State Province, South Africa." In 10th SAGA Biennial Technical Meeting and Exhibition. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609-pdb.146.2.3.

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Reports on the topic "Archaean"

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Trent, J. D., H. K. Kagawa, and N. J. Zaluzec. Chaperonin polymers in archaea: The cytoskeleton of prokaryotes? Office of Scientific and Technical Information (OSTI), July 1997. http://dx.doi.org/10.2172/505321.

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Kelly, R. M. Bioenergetic and physiological studies of hyperthermophilic archaea. Final report. Office of Scientific and Technical Information (OSTI), March 1999. http://dx.doi.org/10.2172/325744.

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Trent, J. D., H. K. Kagawa, Takuro Yaoi, E. Olle, and N. J. Zaluzec. Chaperonin filaments: The archael cytoskeleton. Office of Scientific and Technical Information (OSTI), August 1997. http://dx.doi.org/10.2172/510354.

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Elkins, James G., Victor Kunin, Iain Anderson, Kerrie Barry, Eugene Goltsman, Alla Lapidus, Brian Hedlund, et al. The Korarchaeota: Archaeal orphans representing an ancestral lineage of life. Office of Scientific and Technical Information (OSTI), May 2007. http://dx.doi.org/10.2172/960397.

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Charles J. Daniels. The Role of Multiple Transcription Factors In Archaeal Gene Expression. Office of Scientific and Technical Information (OSTI), September 2008. http://dx.doi.org/10.2172/937513.

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Kelley, John. Expanding Metabolic Diversity of Two Archaeal Phyla: Nanoarchaeota and Korarchaeota. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.5729.

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Luthey-Schulten, Zaida. Computational Modeling of Fluctuations in Energy and Metabolic Pathways of Methanogenic Archaea. Office of Scientific and Technical Information (OSTI), January 2017. http://dx.doi.org/10.2172/1337955.

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Eichler, Jerry. Protein Glycosylation in Archaea: A Post-Translational Modification to Enhance Extremophilic Protein Stability. Fort Belvoir, VA: Defense Technical Information Center, January 2010. http://dx.doi.org/10.21236/ada515568.

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Samuel M. Lesko. Final Report DOE Grant# DE-FG02-98ER62592: Second Cancers, Tumor p53, and Archaea Research. Office of Scientific and Technical Information (OSTI), January 2006. http://dx.doi.org/10.2172/963347.

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Wu, Ming-Hsiao. Temperature Dependent Transcription Initiation in Archaea: Interplay between Transcription Factor B and Promoter Sequence. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.2020.

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