Evidence for High Temperature Condensation of Moderately-volatile Elements during Chondrule Formation

نویسندگان

  • G. Libourel
  • A. N. Krot
  • L. Tissandier
چکیده

ELEMENTS DURING CHONDRULE FORMATION. G. Libourel, A. N. Krot and L. Tissandier, CRPGCNRS 15, Rue Notre-Dame des Pauvres, BP20, 54501 Vandoeuvre les Nancy, France, ENSG-INPL, BP40, 54501 Vandoeuvre les Nancy, France ([email protected]), Hawai'i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai'i at Manoa, Honolulu, HI 96822, USA.

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Evaporation/condensation of Chondritic Chondrule Precursors in Nebular

Introduction: The origin of chondrules remains one of the great enigmas in meteoritics. Under the canonical formation conditions of low pressures, high temperatures and moderate cooling rates (10-1000 K/hr), some evaporation at least of the moderately volatile elements is expected. Chondrules are depleted in moderately volatile elements, but they do not have the systematic isotopic fractionatio...

متن کامل

Size and Density of Chondrule Formation Regions from Missing Isotopic Fractionation

Introduction: Chondrules were probably formed as freely floating molten droplets by brief, very energetic, events in the protoplanetary nebula. Melting of such small objects in the near-vacuum of the nebula should evaporate their more volatile elements, preferentially removing the lighter isotopes of these elements. Chondrules are depleted in their more volatile elements, but unlike other molte...

متن کامل

Volatile fractionation in the early solar system and chondrule/matrix complementarity.

Bulk chondritic meteorites and terrestrial planets show a monotonic depletion in moderately volatile and volatile elements relative to the Sun's photosphere and CI carbonaceous chondrites. Although volatile depletion was the most fundamental chemical process affecting the inner solar nebula, debate continues as to its cause. Carbonaceous chondrites are the most primitive rocks available to us, ...

متن کامل

Early Chemical History of the Solar System

The extreme antiquity and lack of evidence for significant chemical processing of the chondritic meteorites since they were formed suggest he possibility that their chemistry and mineralogy may have been established uring the condensation of the solar system. By using equilibrium thermodynamics, the sequence of condensation of mineral phases from a cooling nebula of solar composition has been c...

متن کامل

Evidence for Fractional Condensation and Flash Reheating from Volatile Rich Objects in Ch-chondrites

Introduction: CH-carbonaceous chondrites have excess FeNi-metal and are strongly depleted in moderately volatile and volatile elements (Mn, Na, Zn, Se), but have CI refractory element/Mg ratios [1]. In contrast to other carbonaceous chondrites, CHs have high modal abundances of chondrules (~70 vol.%) with a mean diameter of 70-90 μm, FeNi-metals (~20 vol.%) and very low fractions of matrix (~5 ...

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

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003