Nd and Sr isotope constraints on the origin of the Cornubian batholith, SW England

  title={Nd and Sr isotope constraints on the origin of the Cornubian batholith, SW England},
  author={D. Darbyshire and T. Shepherd},
  journal={Journal of the Geological Society},
  pages={795 - 802}
Combined Nd and Sr isotope data for the Hercynian granites of SW England provide important new evidence for the origin of the Cornubian batholith. The Nd isotope systematics are shown to be robust even in areas of extensive hydrothermal alteration. ENd values for the main plutons range from −4.7 to −7.1 whereas values for the Palaeozoic country rocks are significantly lower, typically –8 to –11. Depleted mantle Nd model ages (1.3–1.8 Ga) indicate a heterogeneous source region for the granite… Expand

Figures and Tables from this paper

Elemental and Nd-Sr isotopic geochemistry of granitoids from the West Junggar foldbelt (NW China), with implications for Phanerozoic continental growth
We report elemental and Nd-Sr isotopic data for two coeval postcollisional magmatic suites (∼300 Ma), the Miaogou and Karamay suites, from West Junggar foldbelt (NW China), aiming to determine theirExpand
Mantle evolution in the Variscides of SW England: Geochemical and isotopic constraints from mafic rocks
Abstract The geology of SW England has long been interpreted to reflect Variscan collisional processes associated with the closure of the Rhenohercynian Ocean and the formation of Pangea. The CornishExpand
Granitoids of the Central Asian Orogenic Belt and continental growth in the Phanerozoic
The Central Asian Orogenic Belt (CAOB), also known as the Altaid Tectonic Collage, is characterised by a vast distribution of Paleozoic and Mesozoic granitic intrusions. The granitoids have a wideExpand
Phanerozoic crustal growth: U–Pb and Sr–Nd isotopic evidence from the granites in northeastern China
Abstract Northeastern China (NE China) is an eastern part of the Central Asian Orogenic Belt (CAOB). Its geology is distinguished by extensive distribution of Phanerozoic granitic and acid volcanicExpand
Zircon LA-ICPMS geochronology of the Cornubian Batholith, SW England
Abstract Available U Pb age data for the Cornubian Batholith of SW England is based almost entirely on monazite and xenotime, and very little zircon U Pb age data has been published. As a result, noExpand
The Cornubian Batholith : an example of magmatic fractionation on a crustal scale
Abstract. The Cornubian Batholith comprises six major and several smaller bodies of S-type granite in southwestern England. These late-Variscan granites comprise two-mica granites, and much lessExpand
Nd and Sr isotope geochemistry of plutonic rocks from Hong Kong : implications for granite petrogenesis, regional structure and crustal evolution
Abstract Combined Nd and Sr isotope data allow the plutonic rocks of Hong Kong to be grouped into three NE-trending domains. Those of Zone 1 in the northwestern part of the Territory have ϵNd(T) 87Expand
Strontium isotopes — A persistent tracer for the recycling of Gondwana crust in the Variscan orogen
Abstract Voluminous Cambro-Ordovician quartz-rich sandstones blanket large parts of North Africa and Arabia, as well as terranes that later became separated from northern Gondwana. These sandstonesExpand
Source and partitioning of B and Sn in the Cornubian batholith of southwest England
Abstract Emplacement of the Variscan S-type Cornubian Batholith initiated the formation of the historical World-class Sn and Cu deposits and extensive tourmalinisation of southwest England. TheExpand
An Earth–Moon silicon isotope model to track silicic magma origins
Abstract A comparison between terrestrial and lunar igneous rocks reveals that Si isotope compositions become slightly, though significantly enriched in heavy isotopes from basalts to granites andExpand


Chronology of granite magmatism and associated mineralization, SW England
An Rb-Sr study of Hercynian magmatism in SW England has established that the major granites were emplaced c. 290–280 Ma and that the inferred sequence of intrusion shows no geographic pattern. HighExpand
Nd isotopes in French Phanerozoic shales: external vs. internal aspects of crustal evolution
Nd isotopic composition has been determined on shales of Paleozoic (Brittany and Languedoc) and Mesozoic (Lorraine) age. ϵNd(T) values range from −6 to −12 while Nd crustal residence ages areExpand
Sm–Nd isotope characteristics of late Cadomian granite magmatism in northern France and the Channel Islands
Sm–Nd isotopic studies of granites within the late Precambrian, Cadomian, orogenic belt of the North Armorican Massif (northwestern France) and Channel Islands reveal differences between arc-relatedExpand
Petrogenesis of Hercynian leucogranites from the southern Armorican Massif: contribution of REE and isotopic (Sr, Nd, Pb and O) geochemical data to the study of source rock characteristics and ages
Abstract REE geochemistry and isotopic (Pb, Sr, Nd, O) compositions have been studied in up to nine separate leucogranite massifs from three structurally adjacent zones in South Brittany. AgesExpand
Nd and Sr isotopic compositions of lower-crustal xenoliths from north Queensland, Australia: Implications for Nd model ages and crustal growth processes
Abstract Sr and Nd isotopic analyses of granulite-facies lower-crustal xenoliths from northern Queensland, Australia, fall on a mixing array on a 87 Sr 86 Sr vs. 143 Nd 144 Nd diagram at 300 Ma. ThisExpand
Sources of Hercynian granitoids from the French Massif Central: Inferences from Nd isotopes and consequences for crustal evolution
The French Massif Central is characterized by a great abundance and variety of granitoids emplaced during Hercynian times (360-280 Ma). Distinct ϵNd(i) and (87Sr86Sr)i are not associated withExpand
Rare earth element, Sr- and Nd-isotope evidence for petrogenesis of Permian basaltic and K-rich volcanic rocks from south-west England
Permian basic/ultrabasic lavas from south- west England may be divided into a 'basaltic' and a K-rich group. Both groups have enrichment of large-ion litho- phile (LIL) elements relative to highExpand
Thermochronology of the Cornubian batholith in southwest England: Implications for pluton emplacement and protracted hydrothermal mineralization
The metalliferous ore deposits of southwest England are associated with biotite-muscovite granites that intruded upper Paleozoic sediments and volcanic rocks at the end of the Hercynian Orogeny. TheExpand
Crustal evolution of the Hercynian belt of Western Europe: Evidence from lower-crustal granulitic xenoliths (French Massif Central)
Abstract Granulite-facies lower-crustal xenoliths scavenged by the Tertiary basaltic pipes of Bournac and Roche Pointue (Massif Central, France) have been analysed for major and trace elements andExpand
Evolution of the Cornubian ore field, Southwest England; Part I, Batholith modeling and ore distribution
The Cornubian ore field of southwest England is associated with an S-type ilmenite series, high heat production (HHP), two-mica, tourmaline-bearing monzogranite batholith, which formed between 270 toExpand