Carbonatite-like dykes from the eastern Himalayan syntaxis: geochemical, isotopic, and petrogenetic evidence for melting of metasedimentary carbonate rocks within the orogenic crust

Liu, Yan; Berner, Zsolt; Massonne, Hans‐Joachim; Zhong, Dingkun

doi:10.1016/j.jseaes.2004.10.003

Cited by 41 publications

(20 citation statements)

References 39 publications

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“…The magmatic processes of the Madenska River complex were followed by metasomatic processes related to an unexposed, deep-seated causative magmatic body, and finally by regional metamorphic processes. However, the δ 18 O and δ 13 C values of the Madenska River carbonatitelike dyke are very similar to those reported by Liu et al (2006) for the great Himalayan crystallines, which formed as melts from the crustal levels.…”

Section: Resultssupporting

confidence: 85%

“…Preliminary geochemical data on the carbonatite-like dyke of the Madenska River revealed Ba, U, Th, Na, Pb, and REE content and slightly higher values of Sr in the range from 1470 to 3588 pm, which are not typical for normal carbonatites (Pirc et al, 2007) and are much lower than the normal abundance levels for carbonatites (Bell, 1981;Xu et al, 2010). Similar δ 18 O and δ 13 C values ranging from 8‰ to 24.4‰ and 0.80‰ to 3.55‰, respectively, described by Liu et al (2006) in carbonatite-like dykes from the eastern Himalayan syntaxes, were formed as melts from sedimentary carbonates at the crustal levels. They carry xenoliths and show chilled margin and alteration haloes.…”

Section: Discussionmentioning

confidence: 77%

“…They carry xenoliths and show chilled margin and alteration haloes. These dyke rocks are poor in REE, Ba, Sr, U, Th, Nb, FG, and P, which characterizes marbles of sedimentary origin (Liu et al, 2006). The complexes at Borra, Eastern Ghats, India, which are interpreted as formerly of carbonatite origin, show that Borra rocks are metasedimentary .…”

Section: Discussionmentioning

confidence: 99%

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The case of the carbonatite-like dyke of the Madenska River complex at the Kriva Lakavica section in the Republic of Macedonia: oxygen and carbon isotopic constraints

Dolenec¹,

Serafimovski²,

Daneu³

et al. 2015

Turkish J Earth Sci

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The oxygen and carbon isotope compositions of carbonate samples from the carbonatite-like dyke of the Madenska River complex at the Kriva Lakavica section, samples of calcite skarns from the Damjan Fe-ore deposit and the Sasa Pb-Zn ore deposit, and samples of marbles from the Pohorje Mountains were analyzed to provide critical evidence in favor of the magmatic or sedimentary origin of this carbonatite-like dyke. We suggest that the carbonatite-like dyke is not a "normal" carbonatite, but instead represents melted carbonates, which can be associated with an unexposed, deep-seated, causative magmatic body. This dyke has a fluidal texture and carries xenoliths of ultramafic rocks that can be up to 35 cm in size. Its isotopic composition plots between primary unaltered carbonatites and marine carbonates, and ranges between 13.79‰ and 18.89‰ for δ 18 O VSMOW and between -1.22‰ and 1.31‰ for δ 13 C VPDB . These values are significantly lower than those observed in carbonatites analyzed during this study and range between 6.53‰ and 8.10‰ for δ 18 O VSMOW and between -5.82‰ and -4.32‰ for δ 13 C VPDB , which is the primary isotope signature of most magmatic carbonatites. Similarly high δ 18 O and δ 13 C values were found in skarns of the Damjan Fe deposit close to the Madanska River complex and in the Sasa Pb-Zn deposit, as well as in highgrade regional metamorphic calcitic marbles of the Pohorje massive. The emplacement levels of the carbonatite-like dyke, due to several tectonic processes, are uncertain. The type of country rocks (sedimentary carbonates, ultramafic, mafic, and granitic rocks), hydrothermal alternation, and metasomatic and regional metamorphic processes seem to be the most important parameters that affect the O and C isotopic patterns found in the Kriva Lakavica carbonatitelike dyke and in the investigated samples.

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Section: Resultssupporting

confidence: 85%

Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

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The case of the carbonatite-like dyke of the Madenska River complex at the Kriva Lakavica section in the Republic of Macedonia: oxygen and carbon isotopic constraints

Dolenec¹,

Serafimovski²,

Daneu³

et al. 2015

Turkish J Earth Sci

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“…9b), but it is similar to the mantle-derived dolomitic carbonatites of SE Zimbabwe (Harmer et al 1998). Moreover, intrusive carbonates with low REE abundances have been found in Italy (Castorina et al 2000), south India (Srivastava et al 2005a), the eastern Himalayan syntaxis (Liu et al 2006), and the Gebel Mansouri ring complex in the Eastern Desert of Egypt .…”

Section: Intrusive Carbonatesmentioning

confidence: 62%

Origin of a late Neoproterozoic (605 ± 13 Ma) intrusive carbonate–albitite complex in Southern Sinai, Egypt

Azer

Stern

Kimura

2008

Int J Earth Sci (Geol Rundsch)

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New geochemical, isotopic, and geochronological data and interpretations are presented for late Neoproterozoic intrusive carbonates and related rocks of southern Sinai, Egypt (northernmost Arabian-Nubian Shield). The Tarr carbonates are coarsely crystalline and related to explosive emplacement of hypabyssal and volcanic albitite at 605 ± 13 Ma. The carbonates associated with the albitites are divisible into two types: primary dolomitite and secondary breunneritite (Fe-rich magnesite). The dolomitite was clearly intrusive but differs from classic igneous carbonatites, containing much lower abundances of incompatible elements, such as REE, U, Th, Rb, Nb, Y, P, Sr, Zr, Ba, and total alkalies. The breunneritite is a secondary replacement of dolomitite, probably marking the roots of a vigorous hydrothermal system. Albitites show pristine abundances of major and trace elements and were not subjected to a major metamorphic overprint. They are relatively more fractionated, alkaline and related to within-plate A-type magmas, were emplaced in an extensional or non-compressive tectonic regime in the cupola of high-level A-type granite. Tarr albitites may represent residual magma remaining after near-total crystallization of an A-type granite pluton at depth, forcibly emplaced into the roof above the cooling pluton. The intrusive dolomitite exsolved from highly differentiated albitite melt, in the apical regions of a still-buried alkaline ''A-type'' granite pluton that was rich in CO 2 ; these volatiles migrated upwards and towards the cooler margins of the magma body. Late NNE-SSW extension allowed a shallow-level cupola to form, into which albitite melts and carbonate fluids migrated, culminating in explosive emplacement of albitite breccia and intrusive carbonate. Isotopic compositions of Tarr dolomitite and albitite indicate these are consanguineous and ultimately of mantle origin. Magmatic volatiles fenitized the wall rock, while submarine hydrothermal activity transformed some of the dolomitite into breunneritite. Recognition of Tarr-type should encourage similar hypabyssal complex intrusions to be sought for in association with A-type granitic plutons elsewhere.

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“…Such carbonate bodies are not unique and occur in other high-grade terranes, known as "marble dykes" from Norwegian Caledonides [Roberts, Zwaan, 2007], "crustal carbonatite" from the North China craton [Wan et al, 2008], and "carbonatite-like dykes" from the Eastern Himalayan Syntaxis [Liu et al, 2006]. Intrusive carbonate veins with crustal isotope signatures containing various xenoliths were described in the Khabarny mafic-ultramafic allochthone in the Urals [Fershtater, Pushkarev, 1988].…”

Section: P a L E O G E O D Y N A M I C Smentioning

confidence: 99%

Paleoproterozoic crustally derived carbonate-rich magmatic rocks from the Daqinshan area, North China Craton: Geological, petrographical, geochronological and geochemical (Hf, Nd, O and C) evidence

Wan¹,

Liu²,

Xu³

et al. 2008

American Journal of Science

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For citation : Sklyarov E.V., Lavrenchuk A.V., 2017. Allochthonous marbles in high-grade metamorphic terranes (a case study of Olkhon terrane, West Baikal area, Russia). Geodynamics & Tectonophysics 8 (3), 561-563. doi:10.5800/ GT-2017-8-3-0291. Marbles are common constituents of high-temperature (HT) metamorphic terranes and shields. They have been traditionally considered as indicators of sedimentary or volcanic origin of related rocks involved into metamorphism which erases the primary features of the protoliths. This approach is correct in most cases, but carbonate and silicate-carbonate rocks, which often make linear bodies, may be allochthonous in some structurally and compositionally complex metamorphic terranes, as in the case of the Olkhon terrane.The Olkhon metamorphic terrane is a part of the Early Palaeozoic accretionary-collisional system in the northern Central Asian Orogenic Belt (CAOB). The terrane was produced by an Ordovician collision (470-460 Ma) as a collage of numerous chaotically mingled tectonic units that are composed of rocks of different ages (1870-1830, 840, 800, 640, 545, and 500-490 Ma) originated in different tectonic settings. All pre-collisional complexes in the Olkhon terrane have their analogs among the rocks formed during main events in the northern CAOB history [Donskaya et al., 2017]. The terrane history comprised several stages of thrusting, doming, and strike-slip faulting accompanied by high-temperature metamorphism and mafic and granitic magmatism [Fedorovsky, Sklyarov, 2010]. The processes of strike-slip tectonics were the most vigorous and diverse and defined the general structure of the Olkhon region with packages of tectonic units varying in composition, morphology, and structure. The tectonic units are separated by ductile shear zones of blastomylonites. The terrane has a complex mosaic structure but generally splits into the Southeastern and Northwestern major zones with (i) abundant

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Carbonatite-like dykes from the eastern Himalayan syntaxis: geochemical, isotopic, and petrogenetic evidence for melting of metasedimentary carbonate rocks within the orogenic crust

Cited by 41 publications

References 39 publications

The case of the carbonatite-like dyke of the Madenska River complex at the Kriva Lakavica section in the Republic of Macedonia: oxygen and carbon isotopic constraints

The case of the carbonatite-like dyke of the Madenska River complex at the Kriva Lakavica section in the Republic of Macedonia: oxygen and carbon isotopic constraints

Origin of a late Neoproterozoic (605 ± 13 Ma) intrusive carbonate–albitite complex in Southern Sinai, Egypt

Paleoproterozoic crustally derived carbonate-rich magmatic rocks from the Daqinshan area, North China Craton: Geological, petrographical, geochronological and geochemical (Hf, Nd, O and C) evidence

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