A 1.5 Ma record of plume-ridge interaction at the Western Galápagos Spreading Center (91°40′–92°00′W)

Herbrich, Antje; Hauff, Folkmar; Hoernle, Kaj; Werner, Reinhard; Garbe‐Schönberg, Dieter; White, S. M.

doi:10.1016/j.gca.2016.04.036

Cited by 13 publications

(4 citation statements)

References 62 publications

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“…This hypothesis conforms to the interpretations proposed for ophiolite sequences of the Alps and Apennines as shown in [24][25][26][27][28][29][30][31]. Worth of note, recent oceanographic studies emphasize that the petrological characteristics of the current day oceanic rocks are more heterogeneous to that assumed in the past [32][33][34][35][36] and, hence, the "ophiolite concept" interpreted as "fossil oceanic lithosphere with a unique and complete lithologic sequence" has also to be revisited and updated [33].…”

Section: Introductionsupporting

confidence: 85%

“…The enrichment of the BOA basic rocks in incompatible trace elements generating a predominant E-MORB and T-MORB character, by respect to N-MORB, could in theory be related to mantle sources activated by upraising mantle plumes comparatively enriched in trace elements (Gale et al [34]; Herbrich et al [35]), but in our view, for the BOA study case, is more likely attributed to magma genesis by (1) relatively low melting degree; and (2) associated with metasomatized lithospheric mantle sources. These inferences are perfectly compatible with both an OCT setting and an ultraslow-spreading ridge environment (see discussion below), where mantle sources were not depleted by prolonged magmatism.…”

Section: Geochemical Characteristics and Tectonic Setting Of The Boa mentioning

confidence: 99%

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The Betic Ophiolites and the Mesozoic Evolution of the Western Tethys

et al. 2017

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Abstract:The Betic Ophiolites consist of numerous tectonic slices, metric to kilometric in size, of eclogitized mafic and ultramafic rocks associated to oceanic metasediments, deriving from the Betic oceanic domain. The outcrop of these ophiolites is aligned along 250 km in the Mulhacén Complex of the Nevado-Filábride Domain, located at the center-eastern zone of the Betic Cordillera (SE Spain). According to petrological/geochemical inferences and SHRIMP (Sensitive High Resolution Ion Micro-Probe) dating of igneous zircons, the Betic oceanic lithosphere originated along an ultra-slow mid-ocean ridge, after rifting, thinning and breakup of the preexisting continental crust. The Betic oceanic sector, located at the westernmost end of the Tethys Ocean, developed from the Lower to Middle Jurassic (185-170 Ma), just at the beginning of the Pangaea break-up between the Iberia-European and the Africa-Adrian plates. Subsequently, the oceanic spreading migrated northeastward to form the Ligurian and Alpine Tethys oceans, from 165 to 140 Ma. Breakup and oceanization isolated continental remnants, known as the Mesomediterranean Terrane, which were deformed and affected by the Upper Cretaceous-Paleocene Eo-Alpine high-pressure metamorphic event, due to the intra-oceanic subduction of the Jurassic oceanic lithosphere and the related continental margins. This process was followed by the partial exhumation of the subducted oceanic rocks onto their continental margins, forming the Betic and Alpine Ophiolites. Subsequently, along the Upper Oligocene and Miocene, the deformed and metamorphosed Mesomediterranean Terrane was dismembered into different continental blocks collectively known as AlKaPeCa microplate (Alboran, Kabylian, Peloritan and Calabrian). In particular, the Alboran block was displaced toward the SW to occupy its current setting between the Iberian and African plates, due to the Neogene opening of the Algero-Provençal Basin. During this translation, the different domains of the Alboran microplate, forming the Internal Zones of the Betic and Rifean Cordilleras, collided with the External Zones representing the Iberian and African margins and, together with them, underwent the later alpine deformation and metamorphism, characterized by local differences of P-T (Pressure-Temperature) conditions. These Neogene metamorphic processes, known as Meso-Alpine and Neo-Alpine events, developed in the Nevado-Filábride Domain under Ab-Ep amphibolite and greenschists facies conditions, respectively, causing retrogradation and intensive deformation of the Eo-Alpine eclogites.

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Section: Introductionsupporting

confidence: 85%

Section: Geochemical Characteristics and Tectonic Setting Of The Boa mentioning

confidence: 99%

The Betic Ophiolites and the Mesozoic Evolution of the Western Tethys

et al. 2017

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“…In this paper, the values of the LOI of 19 CRMs are also listed in Table S2 . For JG-2, John Stix et al have reported a value of 0.41 [ 37 ], while the value reported by Antje Herbrich et al and Roman Golowin et al was 0.57 [ 38 , 39 ]. The LOI of JG-2 in this study is the same as that reported by John Stix.…”

Section: Resultsmentioning

confidence: 99%

“…The LOI value of JG-1a in this study was 0.68, which approaches that reported by Zongshou Yu. For JA-3, Antje Herbrich et al and Roman Golowin et al have reported a value of 0.34 [ 38 , 39 ], John Stix et al reported a value of 1.08 [ 37 ], and Sarah Freund et al a value of 0.12 [ 41 ]. The LOI value of JA-3 in this study was 0.18, which is similar to that reported by Sarah Freund.…”

Section: Resultsmentioning

confidence: 99%

Comparative Study of Three Mixing Methods in Fusion Technique for Determining Major and Minor Elements Using Wavelength Dispersive X-ray Fluorescence Spectroscopy

Zhang

Xue

Liu

et al. 2020

Sensors

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Accurate analysis using a simple and rapid procedure is always the most important pursuit of analytical chemists. In this study, a new sample preparation procedure, namely the shaker cup (SH) method, was designed and compared with two sample preparation procedures, commonly used in the laboratory, from three aspects: homogeneity of the sample–flux mixture, potential for sample contamination, and sample preparation time. For the three methods, a set of 54 certified reference materials (CRMs) was used to establish the calibration curves, while another set of 19 CRMs was measured to validate the results. In the calibration procedures, the matrix effects were corrected using the theoretical alpha coefficient method combined with the experimental coefficient method. The data of the major oxides (SiO2, TiO2, Al2O3, TFe2O3, MnO, MgO, CaO, Na2O, K2O, and P2O5) and minor elements (Cr, Cu, Ba, Ni, Sr, V, Zr, and Zn) obtained by wavelength dispersive X-ray fluorescence spectroscopy (WD-XRF) were compared using two derivative equations based on the findings by Laurence Whitty-Léveillé. The results revealed that the WD-XRF measured values using the SH method best agreed with the values recommended in the literature.

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Basic Concepts of Geochemistry and Composition of Earth Materials

Verma

2019

Road From Geochemistry to Geochemometrics

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A 1.5 Ma record of plume-ridge interaction at the Western Galápagos Spreading Center (91°40′–92°00′W)

Cited by 13 publications

References 62 publications

The Betic Ophiolites and the Mesozoic Evolution of the Western Tethys

The Betic Ophiolites and the Mesozoic Evolution of the Western Tethys

Comparative Study of Three Mixing Methods in Fusion Technique for Determining Major and Minor Elements Using Wavelength Dispersive X-ray Fluorescence Spectroscopy

Basic Concepts of Geochemistry and Composition of Earth Materials

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