On the Possible Differences in the Bulk Chemical Composition of the Earth and the Moon Forming in the Circumterrestrial Swarm

The Earth ◽

Bulk Chemical ◽

The model of the origin of the Moon in the circumterrestrial swarm during the active stage of the Earth's growth [1, 2] receives now a support (see e.g. [3]). In this model the feeding substance is the same for both bodies. However two different processes may be mentioned of chemical fractionation between the Earth and the Moon.

On the Possible Differences in the Bulk Chemical Composition of the Earth and the Moon Forming in the Circumterrestrial Swarm

The Moon ◽

10.1007/978-94-010-2861-5_38 ◽

1972 ◽

pp. 426-428 ◽

Cited By ~ 1

Author(s):

E. L. Ruskol

Keyword(s):

Chemical Composition ◽

The Moon ◽

The Earth ◽

Bulk Chemical

The Origin of the Moon

Symposium - International Astronomical Union ◽

10.1017/s0074180900178209 ◽

1962 ◽

Vol 14 ◽

pp. 149-155 ◽

Cited By ~ 1

Author(s):

E. L. Ruskol

Keyword(s):

Chemical Composition ◽

Solar System ◽

The Moon ◽

The Earth ◽

The Difference ◽

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

Lunar bulk chemical composition: a post-Gravity Recovery and Interior Laboratory reassessment

10.1098/rsta.2013.0242 ◽

2014 ◽

Vol 372 (2024) ◽

pp. 20130242 ◽

Cited By ~ 41

Author(s):

G. Jeffrey Taylor ◽

Mark A. Wieczorek

Keyword(s):

Formation Processes ◽

The Moon ◽

Volatile Elements ◽

Refractory Elements ◽

The Earth ◽

Lunar Samples ◽

Mass Fractions ◽

Bulk Chemical ◽

Gravity Recovery

New estimates of the thickness of the lunar highlands crust based on data from the Gravity Recovery and Interior Laboratory mission, allow us to reassess the abundances of refractory elements in the Moon. Previous estimates of the Moon fall into two distinct groups: earthlike and a 50% enrichment in the Moon compared with the Earth. Revised crustal thicknesses and compositional information from remote sensing and lunar samples indicate that the crust contributes 1.13–1.85 wt% Al 2 O 3 to the bulk Moon abundance. Mare basalt Al 2 O 3 concentrations (8–10 wt%) and Al 2 O 3 partitioning behaviour between melt and pyroxene during partial melting indicate mantle Al 2 O 3 concentration in the range 1.3–3.1 wt%, depending on the relative amounts of pyroxene and olivine. Using crustal and mantle mass fractions, we show that that the Moon and the Earth most likely have the same (within 20%) concentrations of refractory elements. This allows us to use correlations between pairs of refractory and volatile elements to confirm that lunar abundances of moderately volatile elements such as K, Rb and Cs are depleted by 75% in the Moon compared with the Earth and that highly volatile elements, such as Tl and Cd, are depleted by 99%. The earthlike refractory abundances and depleted volatile abundances are strong constraints on lunar formation processes.

The Origin of the Moon and its Relationship to the Origin of the Solar System

Symposium - International Astronomical Union ◽

10.1017/s0074180900178192 ◽

1962 ◽

Vol 14 ◽

pp. 133-148 ◽

Cited By ~ 2

Author(s):

Harold C. Urey

Keyword(s):

Solar System ◽

The Moon ◽

The Past ◽

The Earth ◽

Short Period ◽

During the last 10 years, the writer has presented evidence indicating that the Moon was captured by the Earth and that the large collisions with its surface occurred within a surprisingly short period of time. These observations have been a continuous preoccupation during the past years and some explanation that seemed physically possible and reasonably probable has been sought.

Isotopic evidence for the formation of the Moon in a canonical giant impact

Nature Communications ◽

10.1038/s41467-021-22155-7 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Sune G. Nielsen ◽

David V. Bekaert ◽

Maureen Auro

Keyword(s):

Solar System ◽

Isotope Fractionation ◽

Main Stage ◽

The Moon ◽

Giant Impact ◽

Bulk Silicate Earth ◽

The Earth ◽

The Standard Model ◽

Isotopic Measurements ◽

AbstractIsotopic measurements of lunar and terrestrial rocks have revealed that, unlike any other body in the solar system, the Moon is indistinguishable from the Earth for nearly every isotopic system. This observation, however, contradicts predictions by the standard model for the origin of the Moon, the canonical giant impact. Here we show that the vanadium isotopic composition of the Moon is offset from that of the bulk silicate Earth by 0.18 ± 0.04 parts per thousand towards the chondritic value. This offset most likely results from isotope fractionation on proto-Earth during the main stage of terrestrial core formation (pre-giant impact), followed by a canonical giant impact where ~80% of the Moon originates from the impactor of chondritic composition. Our data refute the possibility of post-giant impact equilibration between the Earth and Moon, and implies that the impactor and proto-Earth mainly accreted from a common isotopic reservoir in the inner solar system.

The Origin of the Moon and the Core of the Earth

The Earth-Moon System ◽

10.1007/978-1-4684-8401-4_15 ◽

1966 ◽

pp. 224-233 ◽

Cited By ~ 3

Author(s):

John A. O’Keefe

Keyword(s):

The Moon ◽

The Core ◽

The Earth ◽

The Lunar orbit paradox

Theoretical and Applied Mechanics ◽

10.2298/tam1301135t ◽

2013 ◽

Vol 40 (1) ◽

pp. 135-146

Author(s):

Aleksandar Tomic

Keyword(s):

Inertial Mass ◽

Lunar Orbit ◽

The Sun ◽

The Moon ◽

The Earth ◽

Three Body ◽

Origin Of The Moon ◽

Force Intensity ◽

Critical Consideration

Newton's formula for gravity force gives greather force intensity for atraction of the Moon by the Sun than atraction by the Earth. However, central body in lunar (primary) orbit is the Earth. So appeared paradox which were ignored from competent specialist, because the most important problem, determination of lunar orbit, was inmediately solved sufficiently by mathematical ingeniosity - introducing the Sun as dominant body in the three body system by Delaunay, 1860. On this way the lunar orbit paradox were not canceled. Vujicic made a owerview of principles of mechanics in year 1998, in critical consideration. As an example for application of corrected procedure he was obtained gravity law in some different form, which gave possibility to cancel paradox of lunar orbit. The formula of Vujicic, with our small adaptation, content two type of acceleration - related to inertial mass and related to gravity mass. So appears carried information on the origin of the Moon, and paradox cancels.

Synrift sandstones and clayey rocks: bulk chemical composition and location on a number of discriminant paleogeodynamic diagrams

Литология и полезные ископаемые ◽

10.31857/s0024-497x20195439-465 ◽

2019 ◽

pp. 439-465

Author(s):

A. V. Maslov ◽

V. N. Podkovyrov ◽

E. Z. Gareev ◽

A. D. Nozhkin

Keyword(s):

Chemical Composition ◽

Continental Margins ◽

East European ◽

Fine Grained ◽

Sedimentary Deposits ◽

Data Points ◽

Bulk Chemical ◽

Clayey Rocks ◽

Active Continental Margins

The bulk chemical composition of synrift sandstones and associated clayey rocks has been analized, and the distribution of the fields they form has been studied on discriminant paleogeodynamic SiO2K2O/Na2O [Roser, Korsch, 1986] and DF1DF2 [Verma, Armstrong-Altrin, 2013] diagrams. The studied sandstones in terms of bulk chemical composition mainly correspond to greywacke, lititic, arkose and subarkose psammites; Sublitites and quartz arenites are also found. A significant part in the analyzed data massif consists of psammites, in which log(Na2O/K2O)-1.0; missing on the Pettijohn classification chart. This confirms our conclusion, based on the results of mineralogical and petrographic studies, that the sedimentary infill of rift structures unites immature sandstones, the detrital framework of which was formed due to erosion of local sources, represented by various magmatic and sedimentary formations. Synrift clayey rocks, compared with sandstones, are composed of more mature fine-grained siliciclastics. As follows from the distribution of figurative data points of clayey rocks on the F1F2 diagram [Roser, Korsch, 1988], its sources were mainly sedimentary deposits. The content of most of the main rock-forming oxides in the synrift sandstones is almost the same as in silt-sandstone rocks present in the Upper Precambrian-Phanerozoic sedimentary mega-complex of the East European Plate, but at the same time differs significantly from the Proterozoic and Phanerozoic cratonic sediments, as well as from the average composition upper continental crust. It is shown that the distribution of the fields of syntift sandstones and clayey rocks on the SiO2K2O/Na2O diagram does not have any distinct features, and their figurative data points are localized in the areas of terrigenous rocks of passive and active continental margins. On the DF1DF2 diagram, the fields of the studied psammites and clayey rocks are located in areas of riftogenous and collisional environments. We have proposed a different position of the border between these areas in the diagram, which will require further verification.

The preparation of silicate compositions by a gelling method

Mineralogical Magazine and Journal of the Mineralogical Society ◽

10.1180/minmag.1968.036.282.11 ◽

1968 ◽

Vol 36 (282) ◽

pp. 832-838 ◽

Cited By ~ 139

Author(s):

D. L. Hamilton ◽

C. M. B. Henderson

Keyword(s):

Chemical Composition ◽

Chemical Analysis ◽

Weight Yield ◽

Bulk Chemical

SummaryA method for the preparation of chemically homogeneous powders by a weighing and gelling technique is described in detail. Stress is placed on the importance of the weight yield as an indication of the bulk chemical composition and on the chemical analysis of several portions to test the homogeneity. A list of recommended chemicals is included in an appendix.