 | | Book | | mica-bearing peridotite that in some parts of the mine contained so many xenoliths of carbonaceous shale...Iramba plateau west of Singida; only the Mwadui Mine at Shinyanga and one near Kahama have been sufficiently...Republic of South Africa, South-West Africa and Lesotho. The inland plateau of South Africa is the region...are more recent accounts of the kimberlites of Lesotho (Nixon 1973b); the kimberlites of S.W. Africa (Janse...the one striking WNW-ESE - has been termed the Lesotho trend (Crockett and Mason 1968); it is a dominant |  | | Journal (article/letter/editorial) | | perovskite is associated with olivine, spinel, apatite, calcite, serpentine, monticellite, ilmenite and...be cubic or cubo-octahedral in habit (Wesselton mine), and only rarely compose interpenetration twins...of the lower part of the image in apatite (green). Benfontein mine, South Africa. (B) Euhedral crystals...spinel (red, smaller), monticellite (green) and apatite (yellow) in a calcite ā serpentine matrix. The...with a core enriched in REE, Th, Na and Nb. Matsoku, Lesotho. (F) āNecklaceā of large crystals of perovskite |  | | Journal (article/letter/editorial) | | dominates, amphibole, clinopyroxene, ilmenite, rutile, apatite and olivine also occur in various amounts and combinations...rocks from the De Beers Mine (WILLIAMS, 1932), mica-apatite rock, Newlands Mine (WAGNER, 1914), phlogopiteeolivine...diopside-phlogopite rock from the Roberts Victor Mine, the minerals of which have MARID-type composition...kimberlite, Lesotho. Ilmenites from metasomatic veins in uppermantle peridotite xenoliths from the Matsoku pipe...pipe, Lesotho, contain higher Al,Oa, Crz03 and, possibly, Fe,O, than the MARID ilmenites (Table 5). The |  | | Journal (article/letter/editorial) | | rock but in exceptional cases, as at the Matsoku Pipe in Lesotho, may comprise up to 20 ~ of the bulk rock...1. Average and range of 10 garnet lherzolites, Lesotho (Dawson, 1960). 2. Average and range of 23 South...(Nixon et al., 1963). 4. Garnet-websterite, Matsoku, Lesotho (Mathias and Riekwood, 1968). 5. Garnet-websterite...garnet lherzolite, from the Thaba Putsoa pipe, Lesotho, where there is an apparent relationship between...nodule suites at Matsoku (Gurney and Harte, 1980) and at the Letseng pipe both in Lesotho (Bishop et al |  | | Journal (article/letter/editorial) | | Sweden (Sverige) Gladhammar mine, nickel-rich carrollite, 737 Harstig mine, Pajsberg, sarkinite, 681 Norr6...Norr6, arrojadite (hiihnerkobelite), 23o Sjo mine, Grythytte Parish, Orebro, xantharsenite, polyarsenite...Cornwall, luxullianite, 441; 442 Scar Crag, Lake District, arsenopyrite, alloclase, glaucodot, cobaltian...Court farm, Ramsgate, Kent, chalk, i6o Tynebottom mine, Garrigill, Cumbria, arsenical marcasite, gersdorffite...kidwellite, 952 WALES(Cymrul Dyfed, illite, 857 Parc mine, Gwynedd, hydrozincite, nickeloan hydrozincite, |  | | Book (volume) | | Diamond-Graphite Ecologite From the Roberts Victor Mine, C. J. Hatton and John J. Gurney ................. Lower-Crustal Granulites and Eclogites From Lesotho, Southern Africa, W. L. Griffin, D. A. Carswell...and Garnet Harzburgite XenolithsFrom the Premier Mine, South Africa, R. V. Danchin ....................Geochemistryof Ultramarie NodulesFrom Pipe 200, Northern Lesotho, D. A. Carswell, D. B. Clarke, and R. H. Mitchell...ExsolvedClinopyroxenesFrom the Thaba PutsoaKimberlite Pipe, Lesotho, Robert H. McCallister, Henry O. A. Meyer, and |  | SOMMER, H., WAN, Y., KRONER, A., XIE, H., JACOB, D. E. (2013) SHRIMP ZIRCON AGES AND PETROLOGY OF LOWER CRUSTAL GRANULITE XENOLITHS FROM THE LETSENG-LA-TERAE KIMBERLITE, LESOTHO: FURTHER EVIDENCE FOR A NAMAQUA-NATAL CONNECTION. South African Journal of Geology, 116 (2) 183-198 doi:10.2113/gssajg.116.2.183 | Journal (article/letter/editorial) | | XENOLITHS FROM THE LETSENG-LA-TERAE KIMBERLITE, LESOTHO: FURTHER EVIDENCE FOR A NAMAQUANATAL CONNECTION...granulites of the Letseng-la-Terae Diamond Mine in northeastern Lesotho provide evidence that the Tugela Terrane...PETROLOGY OF LOWER CRUSTAL GRANULITE XENOLITHS, LESOTHO Figure 1. Overview map showing the principal tectonic...location of Letseng-la-Terae Diamond Mine in the eastern part of Lesotho. The map is a modified version and...rocks from the lower crust below northeastern Lesotho exist (Schmitz and Bowring., 2004), these data |  | | Journal (article/letter/editorial) | | Abstract U-Pb isotopic thermochronometry of rutile, apatite and titanite from kimberlite-borne lower crustal...entrainment. In combination with coexisting titanite and apatite dates, these results are interpreted as a record...C/Ma, and subsequent variable Pb loss in the apatite and rutile systems during a Mesozoic thermal perturbation...Subsequent partial resetting of U-Pb rutile and apatite systematics in the cratonic margin lower crust...thermochronometers (lettered circles: R rutile, A apatite, S titanite, Z zircon, M monazite). The sensitivity |  | | Journal (article/letter/editorial) | | phases like Ti-kaersutite, Ti-rich spine1 and apatite which indicate the relative abundance of incompatible...correlation in clinopyroxenes from the inclusions in the Matsoku pipe [58]. The scarce spinel-lherzolite samples...fusion may occur in garnetand spinel-free rocks (Lesotho facies [ 15,6 11) or in spinel-peridotites. The...nodule suite in kimberlites, in: Lesotho Kimberlites, P.H. Nixon, ed. (Lesotho Nat. Dev. Corp., 1973) 48-56...geological history of upper mantle xenoliths from the Matsoku kimberlite pipe, in: Physics and Chemistry of the |  | | Journal (article/letter/editorial) | | crustal scapolite granulite xenolith from the Matsoku kimberlite pipe shows a negative end value of -...possibly representative of the base of the crust in Lesotho. It appears that all inclusions, mafic and ultramafic...of this sample contains perovskite, magnetite, apatite, melanite, nepheline, phlogopite and glass (Nixon...pipe in Lesotho. It is interesting to n o t e that the garnet lherzolites fi'om the Lesotho area are...0.222 0.102 0.1572 Bulfontein Jagersfontein Matsoku Bultfontein 90 m.y. 90 m.y. 90 m.y. 0.6545 2 |  | | Journal (article/letter/editorial) | | use only. Bellsbank ā¢ ā¢ .. \ ā¢ I , , N. Lesotho group Single or rew kimberlites Cluster of kimberlitee...ultradepleted nodĀ ules have been described from northern Lesotho (Carswell et a11979) but they are much more common...constituents. They are well documented from northern Lesotho (Nixon & Boyd 1973b), Jagersfontein (MacGregor...was demonstrated for nodules from Thaba Putsoa (Lesotho) by Boyd & Nixon (1972). The fertile nodules approach...comparable to equilibration PT conditions of the Lesotho nodules (2829, 2838, and 2839). The nodule from |  | | Journal (article/letter/editorial) | | UM-18 UM-19 UM-20 Matsoku, Lesotho Matsoku, Lesotho Matsoku, Lesotho Matsoku, Lesotho Lashaine, Tanzania...that contains pargasitic amphibole, biotite, and apatite. It is medium grained with a preferred orientation...garnet lherzolites from the Cretaceous Matsoku kimberlite pipe (Lesotho) and one small sample of garnet-spinel...other researchers is also possible. For example, Matsoku samples UM-18 and UM-19 (LBM 10 and LBM 11, respectively)...depletion indicators with 187Os/188Os for the four Matsoku of this work (Fig. 3) give confidence that the |  | | Journal (article/letter/editorial) | | pil~e, Shinyanga district, Tanzania. All other xenoliths are fi'om South African and Lesotho kimberlites....inclusiot~s collected by J. V. Smith fi'om the Monastery mine. The other specimens were collected by J. B. Dawson...do. do. Roberts Victor do. do. do. do. do. do. Matsoku do. do. do. do. Roberts Victor do. Klipfontein...analyses. Standards were DissJdts glass (Na), A408 apatite (P), Asbestos microcline (K) and Corning V glass...megacrysts, and a spinel-garnet peridotite from the Lesotho and Monastery kimberlites (Bloomer & Nixon 1973; |  | | Journal (article/letter/editorial) | | and associated rocks, with special reference to Lesotho occurrences PETER KRESTE N LITHOS @ Kresten...and associated rocks, with special reference to Lesotho occurrences. Lithos 7. 171-180. Uranium contents...four (apatite. perovskite, zircon, ZrO.) show uranium contents > I ppm. Perovskite and apatite arc the...(Akimov & Semenov 1970) is fairly well known. For Lesotho kimberlites, only a few analyses are available...kimberlites from southern Africa. No. Type LocalityĀ· Lesotho KN3a KN131 PHN1356 LLT6 LLTl5 PH N 1304 PHNI948 |  | | Journal (article/letter/editorial) | | matrix of K-feldspar, biotite, clinopyroxene. apatite, sphene, opaque minerals, late carbonate, and infrequent...the potasbinations of REE-rich phases such as apatite, perovsic rocks and present the following tentative...of olivine, clinopyroxene, biotite, and lesser apatite and titanomagnetite is likely because all these...the geochemistry of kimberlites from the Premier mine, and other selected South African occurrences with...within ultramafic nodules from the Matsoku kimberlite pipe, Lesotho. Curnegie Inst. Wash., Y&k. 74. 528-536 |  | | Journal (article/letter/editorial) | | group ofxenoliths studied from the Matsoku pipe in northern Lesotho contains two xenoliths (BD 1354 and...t~hnlques. TABLE II: Locality Mat~ku North Lesotho Kimberlites U ppm BD 1355 O.O6 Co~se ~uigr~ular...rims around g ~ n e t s BD I143 CX Jagersfontein Mine South Africa U r a n i ~ Contents in Oltrabasic...Africa is 3.13 p p m - - d a t a from primary apatite occurs in most garnet lherzolite Morgan and Lovering... t968; Kleeman et " that primary upper mantle apatite might be the al., 1969; Kleeman and Lovering, 1973; |  | | Journal (article/letter/editorial) | | 2), which is located immediately to the west of Lesotho, on the Kaapvaal craton. Monastery olivines show...interlocking phlogopite and calcite, with minor apatite and subordinate oxides (Fig. TE 5a). Rare monticellite...SC R (e.g. <0.1% TiO2 for the latter suite in Lesotho kimberlites (Nixon and Boyd, 1973). Two garnet...located to the south of the Limpopo Belt. NU The Lesotho kimberlites are located at the east of this transect...of peridotitic olivines from South African and Lesotho kimberlite suites generally fall within a range |  | | Book | | garnet Iherzolite nodules in kimberlites(from Lesotho and South Africa) and were analysed for isotopic... 1971) the uppermost Drakensberg basalts in Lesotho yielded mica ages of 380, The pipe contains abundant...was intended. Unfortunately develĀ¬ opment in the mine has not yet permitted collection of fresh samples...samples from the Premier mine, representing types 1, 2 and 3 as mapped by mine geologists. A good spread...Potassium-argon radioages of Karroo volcĀ¬ anic rocks from Lesotho. Bulletin Volcanologique, XXXV, pp 64-84. J.D. |  | | Journal (article/letter/editorial) | | in two peridotite xenoliths from the Frank Smith mine South Africa: Significance of A1 and Cr distribution... (1979) and Mitchell et al. (1980), Pipe 100, Lesotho; Danchin (1979), Premier, S. Africa; Ferguson et...MacGregor (1979), Kao, Lesotho; Nixon and Boyd (1973), Thaba Putsoa and Mothae, Lesotho; Smith and Dawson...Dawson (1975), Matsoku; Nixon and Boyd (1979), Malaita, Solomon Islands: Sobolev (1977), occurrences in Russia...in two peridotite xenoliths from the Frank Smith mine, Bellsbank, S. Africa. Associated micas are significant |  | | Journal (article/letter/editorial) | | serpentine with lesser spinels, ilmenite, perovskite, apatite, and rarely monticellite and/or diopside. Most...(0.5- 1.0 wt%) is reflected in the abundance of apatite (Dawson 1967). The trace-element compositions of...Muramatsu 1979). The major carriers of REE are apatite and especially perovskite (Boctor & Boyd 1979)...history of the melt. Different diatremes in a district, as well as individual intrusions within the same...337-404 Nixon, P. R., ed. 1973. Lesotho Kimberlites. . Maseru, Lesotho: Lesotho National DevelopĀ ment Corporation |  | | Journal (article/letter/editorial) | | amphibole, phlogopite) and/or anhydrous (e.g. zircon, apatite, rutile, crichtonite-series minerals) phases rich...greater than 1 wt% (Bachinski & Simpson 1984)]. Apatite occurs in inclusions from a number of localities;...amphibole with lesser amounts of MgĀ and Ti-rich mica, apatite, a carbon-rich fluid Ā± sphene, ilmenite, and titanomagnetite...veins in peridotite incluĀ sions from Bultfontein Mine, South Africa, contain a Ca-Zr-Cr-titanate and a...metasomatized inclusions from the Matsoku kimberlite pipe (Lesotho), veins and disseminated grains of |  | | Journal (article/letter/editorial) | | Press Ltd. 1982. Printed in U.S.A. The role of apatite in mantle enrichment processes and in the petrogenesis...investigate relationships between alkali basalts and apatite-rich materials in upper-mantle source regions....assimilation of P-rich material, or both. Amphiboleand apatite-rich xenoliths occur in several alkali-basalt provinces...enrichments of these magmas. Incorporation of such apatite-rich materials by later primary magmas would be...the high P205 concentrations required to achieve apatite saturation in basaltic liquids. In the early stages |  | | Journal (article/letter/editorial) | | (20). Other phases: Ti-magnetite, perovskite, apatite, phlogopite, rare K-richterite (see Lloyd et al...microphenocrysts. Other phases: titanomagnetite, perovskite, apatite, rare kalsilite or nepheline (see Lloyd, 1985)...is prismatic and equant Sr-calcite (to 0.5 mm), apatite (to 0.2 mm), perovskite (0.03 mm), Ti-magnetite...microphenocrysts of Ti-magnetite, perovskite, apatite, clinopyroxene, sanidine, altered melilite together...most xenoliths) titanomagnetite titanite apatite calcite. Igneous textures are common, but a signiĀ®cant |  | | Journal (article/letter/editorial) | | secondary, disseminated quartz (b0.1 mm long) and apatite grains (b0.4 mm long). Rare anhedral, rounded zircon...chlorite, ā¼ 2ā3% FeāTi oxides (ā¤ 0.5 mm), ā¼ 2% apatite (ā¤0.2 mm), trace anhedralāeuhedral zircon (ā¤0.3...some phlogopiteābiotite and diopside, possibly apatite, zircon, a rare unidentified ZrāTi oxide (possibly...xenolith (AR61) showing weak sector zoning (ap, apatite). (c) BSE image of zircon from a serpentinised...relationships with dark cores and bright rims (ap, apatite). 184 P.J. Downes et al. / Lithos 93 (2007) |  | | Journal (article/letter/editorial) | | sheared xenolith from the Thaba Putsoa kimberlite in Lesotho, southern Africa. Analyzed elements include Ni...growth of minerals such as amphibole, mica, and apatite, phases that can control abundances of many trace... Garnet is the principal zoned mineral in the Matsoku xenohths (HARTE et al., 1987), but olivine is zoned...1975) Homogeneity of minerals in mantle rocks from Lesotho. Carnegie Inst. Wash. Yearb. 74,5 19525. BOULLIERA...fabric of peridotite nodules from kimberlite. In Lesotho Kimberlites (ed. P. H. NIXON), pp. 57-66. Cape |
|
