Video Experimental Relacionado

Updated: Aug 28, 2025

Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Formación y evolución del asteroide carbonoso Ryugu: evidencia directa de las muestras devueltas

T Nakamura¹, M Matsumoto¹, K Amano¹

¹Department of Earth Sciences, Tohoku University, Sendai 980-8578, Japan.

Science (New York, N.Y.)

|September 22, 2022

Resumen

Las muestras de asteroides carbonosos Ryugu revelan la formación en el sistema solar exterior. El análisis muestra alteraciones acuosas y orígenes tempranos del Sistema Solar, proporcionando pistas sobre la formación planetaria.

Área de la Ciencia:

* Ciencias planetarias
* Astrogeología
* Cosmoquímica

Sus antecedentes:

* La misión Hayabusa2 devolvió con éxito muestras del asteroide carbonoso Ryugu a la Tierra.
* El asteroide Ryugu es un asteroide de tipo C, que se cree que contiene pistas sobre el sistema solar temprano.

Objetivo del estudio:

* Para analizar la composición mineralógica y química de las muestras de Ryugu.
* Para determinar la ubicación de la formación y la línea de tiempo del cuerpo padre de Ryugu.
* Para comprender los procesos de alteración acuosa que experimentó Ryugu.

Principales métodos:

* Análisis microscópico y espectroscópico de 17 muestras de Ryugu (1-8 mm).
* Identificación de las fases minerales, incluidos los filosilicatos, carbonatos, olivina y piroxeno.
* Simulaciones numéricas que incorporan propiedades mineralógicas y físicas de la muestra.

Principales resultados:

* Descubrimiento de inclusiones de agua con dióxido de carbono en pirrotita, lo que indica el origen del Sistema Solar exterior.
* Baja abundancia de materiales de alta temperatura (condrules, CAI); alta abundancia de filosilicatos y carbonatos.
* Evidencia de alteración acuosa de baja temperatura y alto pH con bajas proporciones agua/roca (<1).

Conclusiones:

* El cuerpo padre de Ryugu se formó en el sistema solar exterior a través de la alteración acuosa.
* La formación ocurrió aproximadamente 2 millones de años después del comienzo de la formación del Sistema Solar.
* Las muestras de Ryugu proporcionan información sobre la composición y la evolución de los primeros materiales del Sistema Solar.

Más Videos Relacionados

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS

Published on: August 31, 2017

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Published on: October 21, 2016

Videos de Conceptos Relacionados

Sulfur Assimilation

Sulfur Assimilation

Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...

Atomic Emission Spectroscopy: Overview

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...

Atomic Emission Spectroscopy: Lab

Atomic Emission Spectroscopy: Lab

AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...

The Fossil Record

The Fossil Record

The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...

Raman Spectroscopy: Overview

Raman Spectroscopy: Overview

The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...

Conditions on Early Earth

Conditions on Early Earth

Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.