Discrimination and origin of the sanukitoid series: Geochemical constraints from the Neoarchean western Karelian Province (Finland)

Heilimo, Esa; Halla, Jaana; Hölttä, Pentti

doi:10.1016/j.lithos.2009.11.001

Cited by 208 publications

(77 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The fact that the whole rock eNd(t) values are somewhat more negative than the zircon eHf(t) may have been the result of lower closure temperatures in some components in the whole rock samples (plagioclase: 350-400°C; Grove et al, 1984) than in the zircons (>900°C; Lee et al, 1997). The geochemistry of the diorite dikes is consistent with them being derived from a depleted mantle source, similar to that proposed for other sanukitoids (Beyth et al, 1994;Heilimo et al, 2010;Martin, 1999;Martin et al, 2009Martin et al, , 2005. The sanukitoid HMA suite is widely considered to be generated through interaction of a mantle peridotite with a silicic melt derived from partial melting of a subducting oceanic slab and/or sediment (e.g., Yogodzinski et al, 1994;Tatsumi, 2001Tatsumi, , 2006Tatsumi and Hanyu, 2003;, consistent with experimental results that show that sanukitoid can be produced by partial melting of harzburgitic or lherzolitic mantle (Tatsumi, 2001;Tatsumi and Ishizaka, 1982).…”

Section: Petrogenesissupporting

confidence: 72%

Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications

Zhang

Chen

et al. 2016

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

Section: Petrogenesissupporting

confidence: 72%

Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications

Zhang

Chen

et al. 2016

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

“…Sanukitoid magmatism is interpreted to be generated by rifting and mantle upwelling related to slab break-off (e.g. Stevenson et al 1999;Lobach-Zhuchenko et al 2008;Heilimo et al 2010). In the RBb, this observation is consistent with a period of magma generation at 2.73-2.71 Ga, followed by voluminous sanukitoid magmatism with negative Ta and Nb anomalies and a coincident depletion in Ti, Y, Yb concentrations in the RBb.…”

Section: Implications For Neoarchean Magmatismmentioning

confidence: 54%

Neoarchean Mantle-derived Magmatism within the Repulse Bay Block, Melville Peninsula, Nunavut: Implications for Archean Crustal Extraction and Cratonization

LaFlamme

McFarlane

Corrigan

2015

View full text Add to dashboard Cite

SUMMARYThe Repulse Bay block (RBb) of the southern Melville Peninsula, Nunavut, lies within the Rae craton and exposes a large (50,000 km 2 ) area of middle to lower crust. The block is composed of ca. 2.86 Ga and 2.73-2.71 Ga tonalite-trondhjemitegranodiorite (TTG) and granitic gneiss that was derived from an older 3.25 and 3.10 Ga crustal substrate. This period of crustal generation was followed by the emplacement of ca. 2.69-2.66 Ga enderbite, charnockite, and granitoid intrusions with entrained websterite xenoliths. These voluminous batholith-scale bodies (dehydrated and hydrated intrusions), and the associated websterite xenoliths, have similar whole rock geochemical properties, including fractionated light rare earth element (LREE)-heavy (H)REE whole rock patterns and negative Nb, Ti, and Ta anomalies. Dehydrated intrusions and websterite xenoliths also contain similar mineralogy (two pyroxene, biotite, interstitial amphibole) and similar pyroxene trace element compositions. Based on geochemical and mineralogical properties, the two lithologies are interpreted to be related by fractional crystallization, and to be the product of a magmatic cumulate processes. Reworking of the crust in a ca. 2.72 Ga subduction zone setting was followed by ca. 2.69 Ga upwelling of the asthenospheric mantle and the intrusion of massif-type granitoid plutons. Based on a dramatic increase in FeO, Zr, Hf, and LREE content of the most evolved granitoid components from the 2.69-2.66 Ga cumulate intrusion, we propose that those granitoid plutons were in part derived from a metasomatized mantle source enriched by fluids from the subducting oceanic slab that underwent further hybridization (via assimilation) with the crust. Large-scale, mantle-derived Neoarchean sanukitoid-type magmatism played a role in the development of a depleted lower crust and residual sub-continental lithospheric mantle, a crucial element in the preservation of the RBb. RÉSUMÉ

show abstract

“…Smithies, 2000;Bé dard, 2006;Willbold et al, 2009;Reimink et al, 2014) and in postorogenic or anorogenic settings (e.g. LobachZhuchenko et al, 2008;Heilimo et al, 2010). Therefore, caution is needed in using the occurrence of ancient HMA and adakitic magmas as an indicator of subduction processes.…”

Section: Formation Of Archean Continental Crustmentioning

confidence: 99%

Coexisting Early Cretaceous High-Mg Andesites and Adakitic Rocks in the North China Craton: the Role of Water in Intraplate Magmatism and Cratonic Destruction

Zheng

et al. 2016

J. Petrology

View full text Add to dashboard Cite

High-Mg andesites (HMAs) and adakitic rocks are purported to occur exclusively in subduction zones in the modern Earth. In the North China Craton, early Cretaceous HMAs and adakitic dacites were erupted in a continental setting, apparently unrelated to subduction given their location distal (>1000 km) to the trench at that time. Here we report petrological, mineralogical and geochemical data for these rocks with the aim of constraining their petrogenesis and elucidating the role of water in intraplate magmatism and cratonic destruction. The HMAs can be subdivided into olivine (Ol-)HMAs and clinopyroxene (Cpx-)HMAs. The former have high MgO (>9Á8 wt %) and Mg# (>71), with rare high-Fo (up to 91) olivine phenocrysts, corresponding to (near-)primary magmas that equilibrated with mantle peridotite. The latter have moderate MgO (7Á8-8Á8 wt %) and Mg# (mostly <70) and low-Fo (mostly < 83) olivine phenocrysts. The Cpx-HMAs are interpreted as magmas differentiated from the Ol-HMAs by olivine-dominated fractionation at lower-crust levels. P-T-X H2O estimations show that the primary HMAs are melts of shallow (1Á1-1Á2 GPa), hot ($1250 C) and wet (H 2 O > 3 wt %) lithospheric mantle. The coexisting adakitic dacites are hydrous (H 2 O ! 5 wt %) magmas with high SiO 2 (>63 wt %), Sr/Y ratios (!39) and Yb SN (source-normalized), low (Sm/Yb) SN , and negligible Eu anomalies. They also have unradiogenic whole-rock Nd [e Nd (t) ¼ -19 to -9] and zircon Hf [e Hf (t) ¼ -23 to -21] isotopic compositions consistent with derivation by melting of ancient lower crust at depths < 40 km. Melting may have been induced by heating and addition of H 2 O from underplated HMAs. Mixing between Cpx-HMAs and low-Mg adakitic dacites in magma chambers produced high-Mg adakitic rocks. The petrogenetic model presented here explains the occurrence of intraplate HMAs and adakitic magmas elsewhere in the North China Craton. The P-T-X H2O conditions inferred for HMA generation imply that the subcontinental lithospheric mantle beneath the craton was hot and hydrous in the early Cretaceous, which may have triggered the destruction of the cratonic root. The occurrence of young HMAs and adakitic rocks in an intraplate extensional environment also casts doubts on the common use of a similar igneous rock association as an indicator of subduction processes in Archean time.

show abstract

Discrimination and origin of the sanukitoid series: Geochemical constraints from the Neoarchean western Karelian Province (Finland)

Cited by 208 publications

References 56 publications

Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications

Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications

Neoarchean Mantle-derived Magmatism within the Repulse Bay Block, Melville Peninsula, Nunavut: Implications for Archean Crustal Extraction and Cratonization

Coexisting Early Cretaceous High-Mg Andesites and Adakitic Rocks in the North China Craton: the Role of Water in Intraplate Magmatism and Cratonic Destruction

Contact Info

Product

Resources

About