Mejillonesite, a new acid sodium, magnesium phosphate mineral, from Mejillones, Antofagasta, Chile

Atencio, Daniel; Чуканов, Н. В.; Nestola, Fabrizio; Witzke, Thomas; Coutinho, José Moacyr Vianna; Zadov, Aleksandr E.; Filho, Reynaldo R. Contreira; Färber, Gunnar

doi:10.2138/am.2012.3867

Cited by 10 publications

(8 citation statements)

References 19 publications

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“…Crystalline organic compounds in modern and fossil guano are mainly water-insoluble uric acid, different crystalline phases of the phosphate and oxalate groups, and salts mainly halite from seawater and sal ammoniac [ 25 ]. Guano deposits are furthermore a source of rare minerals described in the mineralogical literature ([ 64 , 65 ] and references therein). We surveyed crystalline phases on selected powdered samples by XRD (X-ray Diffraction), using a Bruker D2 Phaser and PANanalyticals’ HighScore evaluation software at Technische Universität Berlin, FG Mineralogie.…”

Section: Methodsmentioning

confidence: 99%

The stable isotope composition of nitrogen and carbon and elemental contents in modern and fossil seabird guano from Northern Chile – Marine sources and diagenetic effects

Lucassen

Pritzkow

Rosner³

et al. 2017

PLoS ONE

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Seabird excrements (guano) have been preserved in the arid climate of Northern Chile since at least the Pliocene. The deposits of marine organic material in coastal areas potentially open a window into the present and past composition of the coastal ocean and its food web. We use the stable isotope composition of nitrogen and carbon as well as element contents to compare the principal prey of the birds, the Peruvian anchovy, with the composition of modern guano. We also investigate the impact of diagenetic changes on the isotopic composition and elemental contents of the pure ornithogenic sediments, starting with modern stratified deposits and extending to fossil guano. Where possible, 14C systematics is used for age information. The nitrogen and carbon isotopic composition of the marine prey (Peruvian anchovy) of the birds is complex as it shows strong systematic variations with latitude. The detailed study of a modern profile that represents a few years of guano deposition up to present reveals systematic changes in nitrogen and carbon isotopic composition towards heavier values that increase with age, i.e. depth. Only the uppermost, youngest layers of modern guano show compositional affinity to the prey of the birds. In the profile, the simultaneous loss of nitrogen and carbon occurs by degassing, and non-volatile elements like phosphorous and calcium are passively enriched in the residual guano. Fossil guano deposits are very low in nitrogen and low in carbon contents, and show very heavy nitrogen isotopic compositions. One result of the study is that the use of guano for tracing nitrogen and carbon isotopic and elemental composition in the marine food web of the birds is restricted to fresh material. Despite systematic changes during diagenesis, there is little promise to retrieve reliable values of marine nitrogen and carbon signatures from older guano. However, the changes in isotopic composition from primary marine nitrogen isotopic signatures towards very heavy values generate a compositionally unique material. These compositions trace the presence of guano in natural ecosystems and its use as fertilizer in present and past agriculture.

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Section: Methodsmentioning

confidence: 99%

The stable isotope composition of nitrogen and carbon and elemental contents in modern and fossil seabird guano from Northern Chile – Marine sources and diagenetic effects

Lucassen

Pritzkow

Rosner³

et al. 2017

PLoS ONE

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“…The grain size of Na-Mg-phosphate is too small to characterize it fully. Nonetheless, the position of the Raman band relating to PO 26) Where the major element abun-dances measured and the [H 2 O] estimated, based on an ideal chemical formula, were normalized to a total of 100 wt%. Major element abundances of apatite extend toward that of merrillite, but this could be related to the small size of the targeted grains and the presence of phyllosilicates in the probed area during quantitative analysis (Fig.…”

Section: Textural and Phase Descriptionmentioning

confidence: 99%

“…Numerical simulations of the thermal evolution of icy planetesimals have revealed that an icy planetesimal 10's of km in size could achieve melting of ice through the heat supplied by radioactive nuclei (e.g., 26 Al) contained within its rocky components, which would lead to pervasive aqueous alteration of the interior. e.g., 141) Moreover, as suggested by the analysis of SOM reported here (see section 5.2.6 in detail), if the icy components of Ryugu were composed of not only pure H 2 O, but also ammonia and other chemical species, the aqueous alteration could have proceeded at lower temperatures below the freezing point of pure water.…”

Section: Geological Processes Operating On the Ryugumentioning

confidence: 99%

“…All the aforementioned organic components and their dust grain hosts, as well as the ice mixtures, could then be accreted into the Ryugu progenitor planetesimal (RPP). Heating from the decay of 26 Al would then melt the ice to yield water-rich fluids that in turn initiate aqueous alteration. During aqueous alteration a variety of organic syntheses, such as formose, condensation, Michael addition, hydrolysis and carbonisation reactions and Strecker and Chichiban synthesis, would yield complex SOM and IOM.…”

Section: Evolution Of Som On the Ryugu Progenitor Bodymentioning

confidence: 99%

See 1 more Smart Citation

On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective

Nakamura

Kobayashi

Tanaka

et al. 2022

Proc. Jpn. Acad., Ser. B

115

114

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Presented here are the observations and interpretations from a comprehensive analysis of 16 representative particles returned from the C-type asteroid Ryugu by the Hayabusa2 mission. On average Ryugu particles consist of 50% phyllosilicate matrix, 41% porosity and 9% minor phases, including organic matter. The abundances of 70 elements from the particles are in close agreement with those of CI chondrites. Bulk Ryugu particles show higher ' 18 O, " 17 O, and C 54 Cr values than CI chondrites. As such, Ryugu sampled the most primitive and least-thermally processed protosolar nebula reservoirs. Such a finding is consistent with multi-scale H-C-N isotopic compositions that are compatible with an origin for Ryugu organic matter within both the protosolar nebula and the interstellar medium. The analytical data obtained here, suggests that complex soluble organic matter formed during aqueous alteration on the Ryugu progenitor planetesimal (several 10's of km), <2.6 Myr after CAI formation. Subsequently, the Ryugu progenitor planetesimal was fragmented and evolved into the current asteroid Ryugu through sublimation.

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“…DOI: https://doi.org/10.2138/am-2020-7582. http://www.minsocam.org/ (Atencio et al 2012), and rimkorolgite, BaMg5(PO4)4(H2O)7•H2O (Krivovichev et al 2002). The manner in which these sheets are linked to one another differs for each of these minerals.…”

Section: Chemical Compositionmentioning

confidence: 99%

Jasonsmithite, a new phosphate mineral with a complex microporous framework, from the Foote mine, North Carolina, U.S.A

Kampf

Celestian

Nash

2021

American Mineralogist

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Jasonsmithite (IMA2019-121), Mn 2+ 4ZnAl(PO4)4(OH)(H2O)7•3.5H2O, is a pegmatitephosphate mineral from the Foote Lithium Company mine, Kings Mountain district, Cleveland County, North Carolina, USA. It is is interpreted as having formed by late-stage, lowtemperature hydrothermal alteration. Crystals are colorless to light brown, slightly flattened prisms to about 1 mm in length with wedge-shaped terminations. The mineral is transparent with vitreous luster, white streak, Mohs hardness 2, brittle tenacity, irregular fracture, and perfect {001} cleavage. The density is 2.63(2) g/cm 3. Jasonsmithite is biaxial (-), with α = 1.561(2), β = 1.580(2), γ = 1.581(2), measured in white light. The 2V is 25(5)° and dispersion is r < v

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Mejillonesite, a new acid sodium, magnesium phosphate mineral, from Mejillones, Antofagasta, Chile

Cited by 10 publications

References 19 publications

The stable isotope composition of nitrogen and carbon and elemental contents in modern and fossil seabird guano from Northern Chile – Marine sources and diagenetic effects

The stable isotope composition of nitrogen and carbon and elemental contents in modern and fossil seabird guano from Northern Chile – Marine sources and diagenetic effects

On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective

Jasonsmithite, a new phosphate mineral with a complex microporous framework, from the Foote mine, North Carolina, U.S.A

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