 | | Journal (article/letter/editorial) | | (2004) 81: 85–111
DOI 10.1007/s00710-004-0029-5
Madeira Island alkaline lava spinels:
petrogenetic implications...Universidade de Lisboa,
Faculdade de Ci^encias, Lisboa, Portugal
Received May 17, 2002; revised version accepted...Four groups of spinels have been identified in Madeira Island alkaline basalts: 1) Alrich chromian-spinels...log( f O2)NNO 1.8) during crystallisation from Madeira alkaline magmas. Pressure
does not seem to have...crystallisation sequences during polibaric fractionation of Madeira magmas.
Introduction
Notwithstanding their minor |  | | Journal (article/letter/editorial) | | Islands, Canary Islands, Kerguelen, Gough and Madeira. The He isotopic compositions in
samples of varied...from the Canary Islands,
Kerguelen, Gough and Madeira, considered as a group, show a similar trend with...the other islands
investigated in this study--Madeira, Canary Islands, Gough, and Kerguelen [15]. In...[21].
3.2. Canary Islands, Kerguelen, Gough and
Madeira
Canary Islands. Samples studied are from the
islands...Gran Canaria. The
Lanzarote s a m p l e s - - a dunite, spinel harzburgite,
spinel lherzolite and a g |  | | Journal (article/letter/editorial) | | extraction pathways and stagnation depths beneath the Madeira
and Desertas rift zones (NE Atlantic) inferred...February 2004
Ó Springer-Verlag 2004
Abstract The Madeira and Desertas Islands (eastern
North Atlantic) show...zones which
intersect near the eastern tip of Madeira (São Lourenço
peninsula). We applied fluid inclusion...suggest a multi-stage magma ascent
beneath the Madeira Archipelago: main fractionation
occurs at multiple...Fax: +49-421-2189460
two adjacent rift systems: Madeira and the Desertas may
represent either a two-armed |  | Martins, Sofia, Mata, João, Munhá, José, Mendes, Maria Hermínia, Maerschalk, Claude, Caldeira, Rita, Mattielli, Nadine (2010) Chemical and mineralogical evidence of the occurrence of mantle metasomatism by carbonate-rich melts in an oceanic environment (Santiago Island, Cape Verde) Mineralogy and Petrology, 99 (1) 43-65 doi:10.1007/s00710-009-0078-x | Journal (article/letter/editorial) | | (GeoFCUL),
Campo Grande, C6,
1749-016 Lisboa, Portugal
S. Martins (*) : J. Mata : J. Munhá : R. Caldeira...1749-016 Lisboa, Portugal
e-mail: smmartins@fc.ul.pt
M. H. Mendes
IICT - DES, Lisboa Portugal;
Instituto de...D. Afonso Henriques 41-4° D.,
1000-123 Lisboa, Portugal
C. Maerschalk : N. Mattielli
Department of Earth...Estrada da Portela - Zambujal,
2721-866 Alfragide, Portugal
terised by pronounced negative K anomalies and...for a
westward age decrease (Serralheiro 1976, Madeira et al.
2009), which is more evident in the southern |  | | Journal (article/letter/editorial) | | Isotope Systematics in the Canary Islands
and Madeira: Lithospheric Contamination
and Mantle Plume Signatures...range
in Os isotopic signatures observed in the Madeira and Canary Island
basalts despite a large range...xenoliths from the Canary Islands, Selvagen Grande and
Madeira in the eastern North Atlantic. 187Os/188Os ratios...location of the Canary Islands, Selvagen Islands
and Madeira close to the African continent on old (>130
Ma)...a suite of 28 primarily Holocene basalts from Madeira, Selvagen Grande
and all of the Canary Islands |  | Grachev, A. F., Drubetskoy, Ye. R., Novitskiy, I. P., Araña, V., Brandle, J. (1992) THE GEODYNAMICS OF VOLCANISM IN THE CANARY ISLANDS IN THE LIGHT OF NEW PETROGRAPHIC AND ISOTOPE DATA. International Geology Review, 34 (10) 1053-1062 doi:10.1080/00206819209465655 | Journal (article/letter/editorial) | | former case, the basalts always contain xenoliths of dunite, harzburgite, and less
commonly, lherzolite and...Iceland, 2) Surtsey, 3) Jan Mayen, 4) Azores, 5) Madeira, 6) Tristan-daCunha, 7) St. Helena, 8) Bouvet....21 June 2016
TABLE 1. Chemical Composition of Dunite Xenoiths from Lanzarote and Volcanics from
Tenerife...51
99.50
99.54
99.75
99.66
99.74
Note. 1) Dunite, Hermit-de-la-Magdlena, Lanzaote; 2, 3) harzbugite...equivalents on Tristan da Cunha, Gough,
St. Helena, Madeira, and the Cape Verde Islands in the Atlantic (Fig |  | | Journal (article/letter/editorial) | | has distributed
six geo
chemical
standards,
NIM-D dunite,
NIM-G
granite, NIM-L luj avrite, NIM-N norite...uranium-helium
dating of young volcanic rocks
from the Madeira Archipelago, Earth Planet . Sci.
Lett. 25, 142-150...Metallurgy,
Johannesburg, S. Africa
Uranium
NIM-D
Dunite,
Chrysolite
Sample
Analysis
Content
NIM-L
NIM-N |  | Larrea, Patricia, Galé, Carlos, Ubide, Teresa, Widom, Elisabeth, Lago, Marceliano, França, Zilda (2014) Magmatic Evolution of Graciosa (Azores, Portugal) Journal of Petrology, 55 (11) 2125-2154 doi:10.1093/petrology/egu052 | Journal (article/letter/editorial) | | 1093/petrology/egu052
Magmatic Evolution of Graciosa (Azores,
Portugal)
PATRICIA LARREA1,2*, CARLOS GALE¤1, TERESA UBIDE1...DEPARTMENT, AZORES UNIVERSITY, SA‹O MIGUEL, 9501-801, PORTUGAL
OBSERVATO¤RIO VULCANOLO¤GICO E GEOTE¤RMICO DOS...DOS ACORES, 9560 ATALHADA, SA‹O MIGUEL, PORTUGAL
5
RECEIVED JULY 9, 2013; ACCEPTED SEPTEMBER 8, 2014... gabbro
Syenite
Subalk. gabbro
Alk. gabbro
Dunite
Subalk. gabbro
orthocum.
orthocum.
inequigran... gabbro
Syenite
Subalk. gabbro
Alk. gabbro
Dunite
Subalk. gabbro
orthocum.
orthocum.
inequigran |  | | Report (article/chapter) | | included over 200
papers. Charles Lyell visited Madeira and the
Canary Islands between 1853 and 1854, and...geologist
Georg Hartung (1821–1891) who was staying on
Madeira for the benefit of his health. The paper by
Manuel...1830–1884) described the
olivine-rich rock called dunite. The discovery of
chromite and copper in the region...to decipher some of the successions in southern Portugal, but also to try to
make his counterparts in the |  | Liang, Yu-Hsuan, Halliday, Alex N., Siebert, Chris, Fitton, J. Godfrey, Burton, Kevin W., Wang, Kuo-Lung, Harvey, Jason (2017) Molybdenum isotope fractionation in the mantle. Geochimica et Cosmochimica Acta, 199. 91-111 doi:10.1016/j.gca.2016.11.023 | Journal (article/letter/editorial) | | is a dunite from Twin Sisters
area of Washington State (Flanagan, 1967). The Twin Sisters dunite has large...Atlantic Ocean include the Azores, the
Cameroon Line, Madeira, and Trinidade, which have been studied for their...difference between subaerial (Azores,
Cameroon Line, Madeira, and Iceland) and submarine samples (Galapagos...1159-1172.
Onyeagocha, A.C. (1978) Twin Sisters dunite: Petrology and mineral chemistry. Geol.
Soc. Am...Washington
Cazadero Complex,
California
DTS-1
Dunite
3
PCC-1
Peridotite
KH96-8
Lherzolite
Kilbourne |  | | Journal (article/letter/editorial) | | . . . . . . . . . . . . . . . . .
Harzburgite–dunite–orthopyroxenite suite as a record of supra-subduction...upwelling: Implications for the evolution of the Madeira hotspot in space and time
J. Geldmacher, K. Hoernle |  | | Journal (article/letter/editorial) | | upwelling: Implications for the evolution of the Madeira hotspot in space and time . . . . . . . . . . ... . . . . .
Tamura, A. and S. Arai, Harzburgite–dunite–orthopyroxenite suite as a record of supra-subduction |  | | Journal (article/letter/editorial) | | noble gases, evaluation,
Cenozoic, Atlantic Ocean, Madeira
(Ferreira, M. P., et al.)
25 2 142
Igneous rocks...)
1 2 77
Geochronology
Absolute age, Cenozoic, Madeira, Porto Santo
(Ferreira, M. P., et al.)
25 2 142... temperature, Mid-Atlantic Ridge, Peake
Deep, Madeira Abyssal Plain Biscay Abyssal Plain
(Pugh, D.T.)...Paleozoic, Mesozoic, Cenozoic, paleomagnetism,
Madeira
(Watkins, N. D., et al.)
1 6 471
Pliocene, Pleistocene...north, Africa, Cape Verde Islands, Canary Islands,
Madeira
(Hayes, D. E., et al.)
28 2 105
Sea-floor spreading |  | Madureira, Pedro, Moreira, Manuel, Mata, João, Nunes, João Carlos, Gautheron, Cécile, Lourenço, Nuno, Carvalho, Rosário, de Abreu, Manuel Pinto (2014) Helium isotope systematics in the vicinity of the Azores triple junction: Constraints on the Azores geodynamics. Chemical Geology, 372. 62-71 doi:10.1016/j.chemgeo.2014.02.015 | Journal (article/letter/editorial) | | Rua Costa Pinto, 165, 2770-047 Paço d'Arcos, Portugal
Universidade de Évora, Centro de Geofísica de...Geociências, Rua Romão Ramalho, 59, 7000-671 Évora, Portugal
Equipe de Géochimie et Cosmochimie, Institut de...(CeGUL), Edifício C6, Campo Grande,
1749-016 Lisboa, Portugal
e
Universidade dos Açores, Departamento de Geociências...Apartado 1422, 9501-801 Ponta Delgada, Açores, Portugal
f
UMR Interactions et Dynamique des Environnements...Aeroporto, 1749-077 Lisboa, Portugal
h
MAM, Terreiro do Paço, Lisboa, Portugal
b
c
a r t i c l e
i n f |  | | Journal (article/letter/editorial) | | Quartz eclogite, olivine eclogite, peridotite and dunite are considered as the
material of the lithosphere...tholeiite, which is
ubiquitous at the ocean floor, to dunite, an anhydrous equivalent of serpentinite which...tholeiite; (2) olivine eclogite;
(3) peridotite; and (4) dunite.
The model quartz eclogite is equivalent to an...the
pyrolite defined by Ringwood [7]. The model dunite
is purely hypothetical, consisting mainly of olivine...properties of the model dunite is those
of pure olivine with Fo 93, the solidus of dry dunite is
assumed to be |  | Sagan, Madisen, Heaman, Larry M., Pearson, D. Graham, Luo, Yan, Stern, Richard A. (2020) Removal of continental lithosphere beneath the Canary archipelago revealed from a U Pb Age and Hf/O isotope study of modern sand detrital zircons. Lithos, 362. 105448 doi:10.1016/j.lithos.2020.105448 | Journal (article/letter/editorial) | | preserved on Brava in the Cape Verde archipelago (Madeira et al., 2010). The age range of these
‘young’ detrital...to explain high-εHf basalts reported for some Madeira domain ocean
island/seamount basalts ~400 km north...values from Deserta Bugio,
lP
Deserta Grande, Madeira, and Porto Santo; Geldmacher et al., 2011). A second...genesis. A similar
Jo
scenario exists in the Madeira domain to the north. The Sr-Nd-Pb-Hf isotopic compositions...300 km onland to
the Serra de Monchique region, Portugal overlap Fuerteventura magmatism (Figure 9). Here |  | | Journal (article/letter/editorial) | | Seamount collection
of Matthews (1962), those of the Madeira Seamount described by Phillips (in Laughton et...miles north of Madeira; these prove to be alkali olivine basalts and one
contains a dunite nodule with an...rifts and it is along
the line of these that the dunite mylonites of St. Paul's Rocks are found (Tilley...investigations of a seamount,
150 miles north of Madeira. Deep sea Research, 7, 117-41.
LE MAITRE, R. W...de Se'is. 22, 81-111.
TILLEY, C. E., 1947. The dunite mylonites of St. Paul's Rocks (Atlantic). Amer |  | Baronas, J. Jotautas, Torres, Mark A., West, A. Joshua, Rouxel, Olivier, Georg, Bastian, Bouchez, Julien, Gaillardet, Jérôme, Hammond, Douglas E. (2018) Ge and Si isotope signatures in rivers: A quantitative multi-proxy approach. Earth and Planetary Science Letters, 503. 194-215 doi:10.1016/j.epsl.2018.09.022 | Journal (article/letter/editorial) | | Solimões (Jun. 2005)
Solimões (Dec. 2014)
Negro
Madeira
Amazon
LS01
MMD-02
KOS15
MMD-05
MMD-28
MMD-32... Brazil
Manacapuru, Brazil
Manaus, Brazil
Foz Madeira, Brazil
Iracema, Brazil
2010-05-14
2013-08-11...Dios joins other Andean tributaries to become
the Madeira River (Fig. 3e, Supplementary Table B1). This observation...the three major
Amazon tributaries (Solimões, Madeira, and Negro) all show a remarkably narrow δ 74 Ge...DOC-rich Negro
River and the DOC-poor Solimões or Madeira (Table 1).
3.3.2. Isotopic fractionation of Ge |  | | Journal (article/letter/editorial) | | hornblendite - kaersutite gabbro diorite suite whereas the dunite - wehrlite - olivine clinopyroxenite - clinopyroxenite...Kratern am Sete Cidades
Vulkan: Diese umfassen Dunite, Wehrlite, Olivin-Klinopyroxenite und Olivin-Gabbros...Cidades ausgetreten sind kogenetisch sind.
Die Dunite, Wehrlite, Pyroxenite und Olivin-Gabbros ftihren...iorit-Abfolge handeln, wfihrend die Gruppe der
Dunite, Wehrlite, Olivinklinopyroxenite und Olivingabbro-Nodules...gabbro - diorite nodules; " B " site refers to dunite wehrlite - olivine clinopyroxenite - clinopyroxenite |  | | Journal (article/letter/editorial) | | except for St. Paul's Rocks, which
is a serpentimzed dunite. Table 1 lists the rocks
of these islands, with...have been
dredged as far south as the A/ores and Madeira.
Bradley believes that they may have been
transported...Gabbro
Dioritc
Syenite
Nepbelinite
Scrpcntinizcd dunite
Authors:
2,5
(1) Dalv (1925; 1927)
(2) Iddings |  | | Report (issue) | | thousands of xenoliths, including spinel
lherzolite and dunite. Some samples have a relatively fine
grained; recrystallized...Mosteiros, and its flow contain common xenoliths
of dunite (megacrysts of olivine in a finer grained, recrystallized...Miguel-Acores): Communications de la
Service Geologique de Portugal, v. 38, p. 65-90.
Krause, D.C., and Watkins, N...Magmatic evolution and tectonic regime
in the Canary, Madeira, and Azores island groups:
Geological Society of...Weibel, M., 1972, Chemical study of rocks
from Madeira, Porto Santo, and Sao Miguel, Terceira
(Azores): |  | Simon, Nina S. C., Neumann, Else-Ragnhild, Bonadiman, Costanza, Coltorti, Massimo, Delpech, Guillaume, Grégoire, Michel, Widom, Elisabeth (2008) Ultra-refractory Domains in the Oceanic Mantle Lithosphere Sampled as Mantle Xenoliths at Ocean Islands. Journal of Petrology, 49 (6) 1223-1251 doi:10.1093/petrology/egn023 | Journal (article/letter/editorial) | | Wulff-Pedersen
et al., 1996; Abu El-Rus et al., 2006), Madeira (Munha
et al., 1990), the Azores (Johansen, 1996)...
41
862–1215
1068
OI1-u
7
891–1017
936
Madeira
OI2-u
5
892–1182
1037
Azores
OI2-u
17
1003–1232...OI1-f
4
1047–1233
1190
Mantle xenoliths from Madeira comprise refractory
deformed harzburgites and lherzolites...clinopyroxene (in lherzolite).
OI1-u xenoliths from Madeira (Munha et al., 1990) have
lower (Al2O3)opx (15^3...wider range of 892^11828C, with a
mean of 10378C.
Madeira
1163
OI2-f
2
1028–1227
1127
Kerguelen
OI1-u |  | | Book (edition) | | section is of the correct thickness. The rock is a dunite which
is a monomineralic rock consisting almost...of weathering.
70
Igneous rocks
79
Olivine
Dunite
90
Ha
rz
e
Olivine
orthopyroxenite
Lherzolite...Locality: Madeira.
Basalt
85
1 mm
85
Basalt, plane-polarized light. Locality: Madeira.
86
1 mm...mm
86
Basalt with crossed polars. Locality: Madeira.
75
Olivine basalt
This rock is basaltic but has...light. Locality: Madeira.
96
1 mm
96
82
Gabbro, crossed-polars. Locality: Madeira.
Olivine gabbro |  | | Journal (article/letter/editorial) | | lapilli
Basanite lava
Tephrite lava
Basanite lava
Dunite xenolith fragments
Basanite lava
Basanite lava...distributions are similar to results
e.g. from the Madeira and Aeolian islands [17,62]
but contrast with findings...is presented in
[14,27]. The investigated small dunite xenoliths contain minor clinopyroxene and may represent...extraction pathways and stagnation depths beneath the Madeira and Desertas rift zones (NE Atlantic) inferred |  | | Journal (article/letter/editorial) | | oceanic lithosphere dominated by harzburgite and dunite residues (Neumann et al., 1995). In
contrast, the...and leaving olivine-rich residue behind. Indeed, dunite conduits are well known from the
13
ACCEPTED...element systematic as MORB. Indeed, ophiolitic dunite conduits
have been proposed to represent melt pathways...with the harzburgitic oceanic lithosphere, leaving dunite channels behind,
CE
which preferentially retain...ascending magma, which picked up harzburgite and dunite mantle
fragments on its way to surface. Olivine |
|