The effects of weathering on rare-earth element, Y and Ba abundances in Tertiary basalts from southeastern Australia

Price, Richard; Gray, C. M.; Wilson, R. E.; Frey, Frederick A.; Taylor, Stuart Ross

doi:10.1016/0009-2541(91)90117-a

Cited by 197 publications

(80 citation statements)

References 31 publications

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“…A similar phenomenon has been documented for some volcanic rocks from Hawaii (Roden et al 1984;Foder et al 1989), southeastern Australia (Price et al 1991), and northern New Zealand (Kuschel & Smith 1992), and attributed to cryptic alteration. These samples were excluded from the database.…”

Section: Resultssupporting

confidence: 75%

Geology, petrology, and petrogenesis of Little Barrier Island, Hauraki Gulf, New Zealand

Lindsay

Worthington

Smith

et al. 1999

New Zealand Journal of Geology and Geophysics

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Little Barrier Island is the emergent part of a large, isolated, dacite-rhyodacite volcano in the active Hauraki Rift, 80 km northeast of Auckland. Two volcanic episodes are recognised: Waimaomao Formation was emplaced as a rhyodacite dome at 3 Ma, whereas the more extensive dacitic lavas of Haowhenua Formation were erupted between 1.2 and 1.6 Ma. All Little Barrier lavas are strongly porphyritic and contain phenocrysts of plagioclase, orthopyroxene, and hornblende. Geochemically, they are subduction related and distinct from the older lavas of the Coromandel Volcanic Group, being Zr rich but Rb and Ba poor. Their Sr and Nd isotope ratios are similar to those of the Tonga-Kermadec arc volcanoes. Modelling of the dacite supports petrographic evidence that recharge and mixing were important in the magmatic system. Little Barrier and two dacite domes of similar age and composition near Whangarei form a northwest-trending lineament subparallel to the Alexandra Volcanics and the Vening Meinesz Fracture Zone.

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Section: Resultssupporting

confidence: 75%

Geology, petrology, and petrogenesis of Little Barrier Island, Hauraki Gulf, New Zealand

Lindsay

Worthington

Smith

et al. 1999

New Zealand Journal of Geology and Geophysics

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“…The LOI value is prob a bly con trolled mainly by the wa ter and clay min eral con tent in the ma trix, though pri mary clay min er als devel op ing from vol ca nic ash are con sid ered to re tain the orig i nal REE abun dance in the weath ered ma te ri als (Price et al, 1991 and ref er ences therein). More over, the neg a tive Ce-anom aly, in dic a tive of deeply weath ered ma te ri als (Price et al, 1991;Malpas et al, 2001), is not vis i ble in the chondrite-nor mal ized pat terns of the tuffs stud ied. Some dif fer ences in the con cen trations of el e ments be tween the tuffs from Velykyi Kamenets' and those from Vilkhivchyk may be no ticed (Ta ble 4) which may be a re sult of el e ment mo bil ity dur ing diagenesis.…”

Section: Fig 7 Rep Re Sen Ta Tive Xrd Pat Terns Of the >2 µM Frac Tmentioning

confidence: 89%

Early Cretaceous intra-plate volcanism in the Pieniny Klippen Belt – a case study of the Velykyi Kamenets’/Vilkhivchyk (Ukraine) and Biała Woda (Poland) sections

Oszczypko

Salata

Krobicki

2012

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(2012) -Early Cre ta ceous intra-plate vol ca nism in the Pieniny Klippen Belt -a case study of the Velykyi Kamenets'/Vilkhivchyk (Ukraine) and Biała Woda (Po land) sec tions. Geol. Quart., 56 (4): 629-648, doi: 10.7306/gq.1045The geo log i cal po si tion and geo chem is try of the ba saltic sill and tuffs oc cur ring within the Berriasian-?Albian pe lagic lime stones of the Czorsztyn Suc ces sion are de scribed. The vol ca nic rock suc ces sion of the Velykyi (= Veliky) Kamenets'/Vilkhivchyk (= Vulkhovchik, Vulhovchik, Olkhivchyk) sites is re lated to intra-plate sub ma rine vol ca nism, which took place at the south east ern ter mi na tion of the Pieniny Klippen Belt. This vol ca nism was prob a bly as so ci ated with the Early Cre ta ceous open ing of the Magura/Fore-Magura basinal sys tem, bounded by the Silesian/Marmarosh and Czorsztyn palaeoridges to the north and south re spec tively. The al ka line vol ca nic rocks from the Velykyi Kamenets'/Vilkhivchyk sites are geochemically similar to the ba saltic block from Biała Woda (Małe Pieniny Mts., Poland), which is an olistolith a few metres across within the Jarmuta con glom er ates (Maastrichtian/Paleocene). This ba saltic block was eroded from the fron tal part of the Czorsztyn Nappe and was de pos ited in the up per most part of the Grajcarek Suc ces sion at the southeast ern mar gin of the Magura Ba sin.Nestor Oszczypko and Dorota Salata, In sti tute of Geo log i cal Sci ences, Jagiellonian Uni ver sity,

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“…6). The negative Ce anomalies are probably related to low-temperature alteration (e.g., Price et al, 1991). The source of the Eu anomaly is discussed below.…”

Section: Major and Trace Elementsmentioning

confidence: 97%

Geochemistry and Petrology of Basalts from Leg 136, Central Pacific Ocean

King¹,

Waggoner²,

Garcia³

1993

Proceedings of the Ocean Drilling Program

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About 13 m of Cretaceous, tholeiitic basalt, ranging from normal (N-MORB) to transitional (T-MORB) mid-ocean-ridge basalts, was recovered at Ocean Drilling Program Site 843 west of the island of Hawaii. These moderately fractionated, aphyric lavas are probably representative of the oceanic basement on which the Hawaiian Islands were built. Whole-rock samples from parts of the cores exhibiting only slight, low-temperature, seawater alteration were analyzed for major element, trace element, and isotopic composition. The basalts are characterized by enrichment in the high field strength elements relative to N-MORB, by a distinct positive Eu anomaly, and by Ba/Nb and La/Nb ratios that are much lower than those of other crustal or mantle-derived rocks, but their isotope ratios are similar to those of present-day N-MORB from the East Pacific Rise. Hole 843A lavas are isotopically indistinguishable from Hole 843B lavas and are probably derived from the same source at a lower degree of partial melting, as indicated by lower Y/Nb and Zr/Nb ratios and by higher concentrations of light and middle rare earth elements and other incompatible elements relative to Hole 843B lavas. Petrographic and trace-element evidence indicates that the Eu anomaly was the result of neither Plagioclase assimilation nor seawater alteration. The Eu anomaly and the enrichments in Ta, Nb, and possibly U and K relative to N-MORB apparently are characteristic of the mantle source. Age-corrected Nd and Sr isotopic ratios indicate that the source for the lavas recovered at ODP Site 843 was similar to the source for Southeast Pacific MORB. An enriched component within the Cretaceous mantle source of these basalts is suggested by their initial 208 Pb/ 204 Pb-206 Pb/ 204 Pb and ε Nd -Pb/ Pb ratios. The Sr-Pb isotopic trend of Hawaiian post-shield and post-erosional lavas cannot be explained by assimilation of oceanic crust with the isotopic composition of the Site 843 basalts.

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The effects of weathering on rare-earth element, Y and Ba abundances in Tertiary basalts from southeastern Australia

Cited by 197 publications

References 31 publications

Geology, petrology, and petrogenesis of Little Barrier Island, Hauraki Gulf, New Zealand

Geology, petrology, and petrogenesis of Little Barrier Island, Hauraki Gulf, New Zealand

Early Cretaceous intra-plate volcanism in the Pieniny Klippen Belt – a case study of the Velykyi Kamenets’/Vilkhivchyk (Ukraine) and Biała Woda (Poland) sections

Geochemistry and Petrology of Basalts from Leg 136, Central Pacific Ocean

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