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| Wu, Fu-Yuan, Yang, Yue-Heng, Mitchell, Roger H., Li, Qiu-Li, Yang, Jin-Hui, Zhang, Yan-Bin (2010) In situ U–Pb age determination and Nd isotopic analysis of perovskites from kimberlites in southern Africa and Somerset Island, Canada. Lithos, 115 (1) 205-222 doi:10.1016/j.lithos.2009.12.010 | Journal (article/letter/editorial) | | from
kimberlites in southern Africa and Somerset Island, Canada
Fu-Yuan Wu a,⁎, Yue-Heng Yang a, Roger...Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1
a r t i c l e
i n f o
Article history:...U–Pb ages
Nd isotopes
Perovskite
Kimberlite
Southern Africa
Canada
a b s t r a c t
Determination of...emplacement ages and initial isotopic composition of kimberlite by conventional isotopic
methods using bulk rock...twelve samples from 7 kimberlites from Somerset Island, Canada have been
selected for in situ perovskite | 👁 Image
| | Journal (article/letter/editorial) | | minerals in six carbonate-kimberlites: Peuyuk, Tunraq, Wesselton, Liqhobong,
De Beers, and Benfontein...crystallization appears to be typical of carbonate-rich kimberlite magmas, and is texturally
related to the two...spinels span a large range in composition from
Mg-Al-chromite to Mg-Al-titanomagnetite, with an intermediate...pre-fluidization to post-fluidization stages of kimberlite emplacement
(Haggerty, 1973; Mitchell & Clarke...residuum with progressive crystallization of kimberlite magma
is typical and probably more common than | 👁 Image
| | Journal (article/letter/editorial) | | 1093/petrology/egn034
Crystallization of Groundmass Spinel
in Kimberlite
P. L. ROEDER1* AND D. J. SCHULZE2
1
DEPARTMENT...QUEEN’S UNIVERSITY, KINGSTON, ONTARIO K7L 3N6, CANADA
2
DEPARTMENT OF GEOLOGY, UNIVERSITY OF TORONTO...MISSISSAUGA, ONTARIO L5L 1C6, CANADA
Groundmass spinel grains in 46 kimberlite and related rocks have
been...spinel analyses
are classified as high-chromium chromite (Chr) and magnesioulvo« spinel^magnetite (Mum)...phase that crystallized as small octahedra from
kimberlite magma on the journey from the upper mantle to | 👁 Image
| | Journal (article/letter/editorial) | | compositiontoward MgFe2Ooand FerOo,and a titanian aluminous chromite that belongsto the FeCrroo-MgCrron-FeAlroo-MgAlroo...The physical and chemical changesundergoneby kimberlite magma during its eruption and crystallization...can be gained by study of groundmassminerals in kimberlite and of late-stagereactionsbetween kimberlitic...kimberlitic minerals and the residualfluids of kimberlite magma.Boyd and Clement (1977)describedmetasomatic zoning...zoning trend" toward enrichment in MgTiO, and a "kimberlite reaction trend" toward enrichmentin FeTiO, and | 👁 Image
| | Journal (article/letter/editorial) | | What is a Kimberlite?
Petrology and Mineralogy
of Hypabyssal Kimberlites
Roger H. Mitchell1, Andrea Giuliani2...analyses. Melt inclusion studies have shown that kimberlite melts
contain higher alkali concentrations than...(magmatic and/or crustal), the composition of primary kimberlite
melts remains unknown.
intrusive bodies of holocrystalline...coherent rock (Fig. 1A) occur
at different depths in kimberlite
pipes (see Fig. 4 in Giuliani and
Pearson 2019...ic
k imberlites” (K PK; formerly
“tuffisitic kimberlite”; named after
a classic locality in South Africa) | 👁 Image
| | Journal (article/letter/editorial) | | evolution:phlogopitesand oxidesfrom the Fayette County kimberlite, Pennsylvania Rosenr H. HuNren.r ReNoeL D. KIssI-tNG...Spinelsshow zonation (CMAT) from titanian Mg-Al-chromite(TMAC) throughchromianMg-Al-titanomagnetite (MAT)...fugacitesof 02, 52, and CO2. Introduction Typically, kimberlite consistsof megacrysts,and their inclusions,and...velocity zone (LVZ) related to the genesisof kimberlite and its early stages of evolution. In this regard...02-0030$02. 00 30 in the mid- to late-stagesof kimberlite evolution' Since the evolution of a melt is usually | 👁 Image
| | Book | | Mitchell
Lakehead University
Thunder Bay, Ontario, Canada
SPRINGER SCIENCE+BUSINESS MEDIA, LLC
Library...petrology.
Bibliography: p.
Includes index.
I. Kimberlite. I. Title.
QE462.K5M58 1986
552' .3
ISBN 978-1-4899-0570-3...critique of the advances which have been
made in kimberlite studies over the last twenty-five years.
Kimberlites...in this book will serve to
stimulate further kimberlite studies. Some of the hypotheses discussed will...University and for his help in the continuance of my
kimberlite research.
This book would not have been possible | 👁 Image
| | Journal (article/letter/editorial) | | Petrology
9 Springer-Verlag 1984
The alleged kimberlite-carbonatite relationship:
evidence from ilmenite...composition, have been used to
refute the "alleged kimberlite-carbonatite relationship".
New microprobe analyses...kimberlites.
The ilmenites are distinguished from kimberlite ilmenites
by higher MnO, FeTiO 3, and Nb2Os,...negligible
Cr20 3. The spinels are distinguished from kimberlite spinels
by their AI203 and Cr203 contents. There...carbonaterich dikes of igneous origin cut the kimberlite of the Premier
Mine, South Africa. Dawson (1980) | 👁 Image
| | Journal (article/letter/editorial) | | diamonds (e.g. Prider 1960, Jaques et aI1982).
Kimberlite provinces consistently possess the following...Figure 1
Very generalized representation of kimberlite localities. Shaded regions are cratons ;C 1500...m.y. old. Open symbols represent individual
kimberlite bodies; closed symbols show provinces. Diamond...(c) epeirogenic f1exuring directly preceding
kimberlite intrusion, as in South Africa and Siberia (Dawson...(Dawson 1980).
Structural analysis of kimberlite terranes through field mapping, geo- ,
physical exploration | 👁 Image
| | Journal (article/letter/editorial) | | Departmentof Geology Universityof WesternOntario London, Canada,N6A 587 Abstract The ultrapotassicrocks of the...Spain; the West Kimberley region, Western Australia; the Toro-Ankole region, southwest Uganda; and Gaussberg...have been derived from an ultramafic mantle. The chromite inclusions in such olivines (Table l) would thereforealso...after, the phlogopite early crystallization of chromite from the orendite (Table l), suggestingthat prior...prior to phlogopite crystal- liquids. Chromite is rimmed by phlogopite in the lization the liquid may | 👁 Image
| | Book (volume) | | AmericanGeophysicalUnion
Washington,D.C. 20009
1979
Kimberlite Conference
Preface
Since the first
edition...was published in 1979, the Third International
Kimberlite
Conference was held in Clermont-Ferrand
in 1982...concerning
rocks now misleadingly referred to as Kimberlite will be removea.
Diamonds received attention...still
there persists the belief that diamonds
an• kimberlite are genetically related.
And this in spite of...one can separate out the essential minerals of kimberlite.
This comment is pertinent
to isotopic studies | 👁 Image
| | Journal (article/letter/editorial) | | Mineral chemistry and crystallization sequences in kimberlite
and lamproite dikes from the Sisimiut area, central...C.P. 6128, succ. "A "', Montrkal, P.Q. H3C 3J7 (Canada
LITHOS
Thy, P., Stecher, O. and Korstg~rd, J...Mineral chemistry and crystallization sequences in kimberlite and lamproite dikes from the Sisimiut area, central...macrocrysts are believed to be cognate. The primary kimberlite and lamproite
magmas originated in the mantle...phlogopite points to a
relatively low as,o.~ in the kimberlite magmas. Higher as,o.~ appears to have prevailed | 👁 Image
| | Report (issue) | | 3.
4.
5.
6.
7.
8.
Geologic map of Williams kimberlite diatremes
Magnetic map of Williams 1, 2 and 3...was occurring just prior to incorporation in kimberlite
and that ascent was rapid enough (40-70 km/hr)...recrystallization before or during inclusion in
kimberlite is suggested by larger (up to 3mm) euhedral olivines...pressure and temperature prior to inclusion in the kimberlite, followed by
metasomatic introduction of phlogopite...variations of peridotites seem most compatible with kimberlite generation
and ascent during dynamic diapiric | 👁 Image
| | Journal (article/letter/editorial) | | also provoked debate. Fresh, hypabyssal-facies kimberlite from S. W. Pennsylvannia contains a well-preservedmegacrystand...general characteristicsof the Fayette County kimberlite are describedin a companionpaper(Hunter et al...occur as a megacryst/phenocryst phasein this kimberlite but rather as inclusions in olivine and garnet...shadedareasare the rangesof compositionsin the sloan-Nix kimberlite pipes in colorado and wyoming (Eggler er al....kelyphite rims, and in the groundmass of this kimberlite, which themselves show systematic chemical variability | 👁 Image
| | Book | | Mitchell
Lakehead University
Thunder Bay, Ontario
Canada
SPRINGER SCIENCE+BUSINESS MEDIA, LLC
Library...kimberlites and reviews some of the advances in kimberlite petrology since 1986.
The work is a critical...although current hypotheses for the genesis of kimberlite and orangeite are
critically reviewed.
These...Natural Sciences and Engineering Research Council of Canada, Lakehead
University, and De Beers Consolidated...8.1. Finsch . . . . . . . .
1.8.2. Barkly West Region.
1.8.2.1. Bellsbank.
1.8.2.2. Sover . . .
1.8.2 | 👁 Image
| Nasir, S., Al-Khirbash, S., Rollinson, H., Al-Harthy, A., Al-Sayigh, A., Al-Lazki, A., Theye, T., Massonne, H.-J., Belousova, E. (2011) Petrogenesis of early cretaceous carbonatite and ultramafic lamprophyres in a diatreme in the Batain Nappes, Eastern Oman continental margin. Contributions to Mineralogy and Petrology, 161 (1) 47-74 doi:10.1007/s00410-010-0521-3 | Journal (article/letter/editorial) | | rocks include group-I ‘‘basaltic’’, and
group-II kimberlite ‘‘orangeites, micaceous lamprophyric’’,
and olivine...prepared
crushed rocks in commercial laboratories in Canada
(2 samples, 3 kg each) and in Australia (2 bulk...Activation Laboratories Ltd.,
Ancaster, Ontario, Canada. Several standards were used to
check accuracy...(after Belousova et al. 2002)
C carbonatite, K kimberlite
a
Data below EMP detection level
Fig. 3 a Field...different rock varieties. Spinel is mostly composed of chromite–spinel solid
solutions with up to 5 wt% TiO2, | 👁 Image
| | Book | | ABSTRACTS
contributed to
THE SECOND INTERNATIONAL KIMBERLITE CONFERENCE
Bishop's Lodge,
Santa Fe,
October...■•A-
V\
f I
'
, A.
DIAMONDIFEROUS
SOUTHERN
KIMBERLITE
OF
THE WAJRAKHARUR AREA,
INDIA.
Jagannadham...known in India from antiquity
the presence of kimberlite has been the subject of much specu¬
lation and...were described, but were discounted as being
kimberlite
(Foote,
1889;
Lake,
1890).
Subsequently...and Mehr, 1953) but generally con¬
sidered that kimberlite was not present.
However, in 1963
Rao and Phadtre | 👁 Image
| | Thesis/Dissertation | | Slave volcaniclastic province, NWT, are kimberlite breccias. diatreme-facies Major-element Lake...and megacrystic ilmenite distinguish the Eddie kimberlite pipe from the Torrie and Sputnik pipes. Large...melts, also reflects heterogeneity in their source region that resulted from partial melting of refertilized...refertilized peridotite. The Torrie and Sputnik kimberlite pipes have diamond indicator minerals consistent ...Tanqueray Resources for giving me access to the kimberlite samples. Finally, | would like to thank my fellow |
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