Origin of chondrules explained

Gamma-Ray Bursts and the Origin of Chondrules and Planets

The effect of a nearby γ-ray burst (GRB) on the preplanetary solar nebula is considered. The intense irradiation by x-rays and γ-rays would have caused dust balls to become molten in a matter of seconds, cooling more slowly to form chondrules. The role of iron is crucial in this process because it was the major absorber of x-rays between 7 keV and 30 keV. In this scenario, chondrules formed at ...

Tungsten isotopic constraints on the age and origin of chondrules.

Chondrules may have played a critical role in the earliest stages of planet formation by mediating the accumulation of dust into planetesimals. However, the origin of chondrules and their significance for planetesimal accretion remain enigmatic. Here, we show that chondrules and matrix in the carbonaceous chondrite Allende have complementary (183)W anomalies resulting from the uneven distributi...

The Origin of Niningerite in Eh3 Silica-bearing Chondrules: Insights from Mineral Equilibria

The primary liquid condensation model and the origin of barred olivine chondrules

Barred olivine (BO) chondrules are some of the most striking objects in chondrites. Their ubiquitous presence and peculiar texture caught the attention of researchers and, as a consequence, considerable effort has been expensed on unraveling their origin(s). Here we report on a detailed study of two types of chondrules: the Classic and the Multiple-Plate Type of BO chondrules from the Essebi (C...

Constraints on the Origin of Chondrules and Cais from Short - Lived and Long - Lived Radionuclides

chondrules and other meteorites. The initial Al/Al ratios of well correlated isocrhons obtained from CAIs distributed mostly between (4-6) ×10 [3]. Other data for individual samples are from [4-16]. CONSTRAINTS ON THE ORIGIN OF CHONDRULES AND CAIS FROM SHORT-LIVED AND LONGLIVED RADIONUCLIDES. N. T. Kita , G. R. Huss, S. Tachibana, Y. Amelin, E. Zinner, L. E. Nyquist, and I. D. Hutcheon, Geologi...