Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Tungsten isotopic constraints on the age and origin of chondrules

There are no MPG-Authors in the publication available
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Budde, G., Kleine, T., Kruijer, T. S., Burkhardt, C., & Metzler, K. (2016). Tungsten isotopic constraints on the age and origin of chondrules. Proceedings of the National Academy of Science, 113, 2886-2891. doi:10.1073/pnas.1524980113.

Cite as: https://hdl.handle.net/21.11116/0000-000D-D276-1
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 183W anomalies resulting from the uneven distribution of presolar, stellar-derived dust. These data refute an origin of chondrules in protoplanetary collisions and, instead, indicate that chondrules and matrix formed together from a common reservoir of solar nebula dust. Because bulk Allende exhibits no 183W anomaly, chondrules and matrix must have accreted rapidly to their parent body, implying that the majority of chondrules from a given chondrite group formed in a narrow time interval. Based on Hf-W chronometry on Allende chondrules and matrix, this event occurred ∼2 million years after formation of the first solids, about coeval to chondrule formation in ordinary chondrites.