Tracing cosmic impacts by osmium in lacustrine sediments

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Alteration of iron-rich lacustrine sediments by dissimilatory iron-reducing bacteria

The reduction of Fe during bacterial anaerobic respiration in sediments and soils not only causes the degradation of organic matter but also results in changes in mineralogy and the redistribution of many nutrients and trace metals. Understanding trace metal patterns in sedimentary rocks and predicting the fate of contaminants in the environment requires a detailed understanding of the mechanis...

متن کامل

Tracing cosmic evolution with clusters of galaxies

The most successful cosmological models to date envision structure formation as a hierarchical process in which gravity is constantly drawing lumps of matter together to form increasingly larger structures. Clusters of galaxies currently sit atop this hierarchy as the largest objects that have had time to collapse under the influence of their own gravity. Thus, their appearance on the cosmic sc...

متن کامل

Tracing Cosmic Chemical Evolution with GRBs

Abundance measurements with bright background light sources, such as quasars and GRBs, probe the large-scale distribution and physical state of evolving, coupled gasstar dark matter structures in the Universe. Not all baryons inferred from BBN and the CMB are accounted for in the local Universe; a significant fraction resides in warm-hot tenuous gas filaments tracing the large-scale distributio...

متن کامل

Tracing cosmic evolution with the Coma cluster

We summarize here the first results of a new spectroscopic survey of galaxies in the Coma cluster with −20.5 < MB < −14. Differences between the last epoch of star formation (SF) activity in S0 and elliptical galaxies are discussed. Furthermore, we show that about half of all galaxies without present-day SF display signs of activity at z < 1− 2. Systematic trends of most recent SF epoch with ga...

متن کامل

Variation in aeolian environments recorded by the particle size distribution of lacustrine sediments in Ebinur Lake, northwest China

Particle size analysis of lacustrine core sediments and atmospheric natural dust were conducted in the drainage area of Ebinur Lake in arid northwest China. Using a combination of (137)Cs and (210)Pb dating, a continuous record of aeolian transportation to the lake sediments and related factors over about the past 150 years was analyzed. Factor analysis revealed the particle-size distributions ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Eos, Transactions American Geophysical Union

سال: 2002

ISSN: 0096-3941

DOI: 10.1029/2002eo000332