Featured Research

from universities, journals, and other organizations

New Analysis Sheds Light On Earth's Origins

Date:
June 7, 2000
Source:
University Of Michigan
Summary:
A new analytical method has resolved a longstanding scientific debate on the origins of Earth and the moon. New data from meteorites support the idea that planets, as they formed, received materials from very broad regions of the solar system rather than localized regions as previously thought.

ANN ARBOR --- A new analytical method has resolved a longstanding scientific debate on the origins of Earth and the moon, researchers from the University of Michigan and the Swiss Federal Institute of Technology report in the June 2 issue of Science.

Related Articles


The debate focuses on a group of primitive meteorites called enstatite chondrites. Because the ratio of different forms (isotopes) of oxygen in materials from Earth and the moon matches that of enstatite chondrites---but no other meteorites---it had been proposed that Earth formed from materials much like the enstatite chondrites. These materials were thought to have come from a very localized region of the solar system. But other studies, such as simulations of how the planets formed, have cast doubt on the theory.

Der-Chuen Lee, a research fellow in the U-M Department of Geological Sciences, and Prof. Alex N. Halliday of the Swiss Federal Institute of Technology's Institute for Isotope Geology and Mineral Resources in Zurich, Switzerland, used a recently developed method that compares extremely small differences in tungsten isotope ratios. If Earth and the moon did form from material similar to enstatite chondrites, their tungsten isotopic compositions, as well as their oxygen isotopic compositions, should match.

"To our surprise, enstatite chondrites do not have the same tungsten isotopic compositions as Earth," nor do they match any other meteorites that have been tested, says Lee. Based on this evidence, "we propose for the first time with much certainty that there is no direct genetic relationship between Earth and enstatite chrondrites." Instead, the data support the alternative idea that planets, as they formed, received materials from very broad regions of the solar system.


Story Source:

The above story is based on materials provided by University Of Michigan. Note: Materials may be edited for content and length.


Cite This Page:

University Of Michigan. "New Analysis Sheds Light On Earth's Origins." ScienceDaily. ScienceDaily, 7 June 2000. <www.sciencedaily.com/releases/2000/06/000605173614.htm>.
University Of Michigan. (2000, June 7). New Analysis Sheds Light On Earth's Origins. ScienceDaily. Retrieved January 30, 2015 from www.sciencedaily.com/releases/2000/06/000605173614.htm
University Of Michigan. "New Analysis Sheds Light On Earth's Origins." ScienceDaily. www.sciencedaily.com/releases/2000/06/000605173614.htm (accessed January 30, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Friday, January 30, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Rare Clouds Fill Grand Canyon

Raw: Rare Clouds Fill Grand Canyon

AP (Jan. 29, 2015) For the second time in two months, a rare weather phenomenon filled the Grand Canyon with thick clouds just below the rim on Wednesday. (Jan. 29) Video provided by AP
Powered by NewsLook.com
Senate Passes Bill for Keystone XL Pipeline

Senate Passes Bill for Keystone XL Pipeline

AP (Jan. 29, 2015) The Republican-controlled Senate has passed a bipartisan bill approving construction of the Keystone XL oil pipeline. (Jan. 29) Video provided by AP
Powered by NewsLook.com
"Cloud Inversion" In Grand Canyon

"Cloud Inversion" In Grand Canyon

Reuters - US Online Video (Jan. 29, 2015) Time lapse video captures a blanket of clouds amassing in the Grand Canyon -- the result of a rare meteorological process called "cloud inversion." Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Why Researchers Say We Should Cut Back On Biofuels

Why Researchers Say We Should Cut Back On Biofuels

Newsy (Jan. 29, 2015) Biofuels aren&apos;t the best alternative to fossil fuels, according to a new report. In fact, they&apos;re quite a bad one. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins