Chondrules and the Protoplanetary Disk

by Edited by R. H. Hewins , Rhian Jones , Ed Scott

• ISBN13: 9780521174893
• ISBN10: 0521174899
• Edition: Revised
• Format: Paperback
• Copyright: 2011-03-03
• Publisher: Cambridge University Press
• More Book Details

Summary

This book is the first comprehensive review of chondrules and their origins since a consensus developed that they were made in the disk of gas and solids that formed the Sun and planets 4.5 billion years ago. Fifty scientists from assorted disciplines have collaborated to review how chondrules could have formed in the protoplanetary disk. When and where in the disk did they form? What were they made from and how fast were they heated and cooled? What provided the energy to melt chondrules--nebular shock waves, lightning discharges, protostellar jets? Following an exciting international conference in Albuquerque, New Mexico, the latest answers to these questions are presented in thirty-four articles, which will appeal to researchers in planetary science and meteoritics.

Table of Contents

Introduction

Chondrules and the protoplanetary disk: An overview

Chonrules, Ca-Al-Rich Inclusions and Protoplanetary Disks

Astronomical observations of phenomena in protostellar disks

Overview of models of the solar nebula: potential chondrule-forming environments

Large scale processes in the solar nebula

Turbulence, chondrules and planetisimals

Chondrule formation: energetics and length scales

Unresolved issues in the formation of chondrules and chondrites

Thermal processing in the solar nebula: constraints from refractory inclusions

Formation times of chondrules and Ca-Al-Rich inclusions: constraints from short-lived radionuclides

Formation of chondrules and chondrites in the protoplanetary nebula

Chondrule precursors and multiple melting

Origin of refractory precursor components of chondrules

Mass-independent isotopic effects in chondrites: the role of chemical processes

Agglomeratic chondrules: implications for the nature of chondrule precursors and formation by incomplete melting

Constraints on chondrule precursors from experimental Data

Nature of matrix in unequilibrated chondrites and its possible relationship to chondrules

Constraints on chondrite agglomeration from fine-grained chondrule

Relict grains in chondrules: evidence for chondrule recycling

Multiple heating of chondrules

Microchondrule-bearing chondrule rims: constraints on chondrule formation

Heating, Cooling and Volatiles

A dynamic crystallization model for chondrule melts

Peak temperatures of flash-melted chondrules

Congruent melting kinetics: constraints on chondrule formation

Sodium and sulfur in chondrules: heating time and cooling curves

Open-system behaviour during chondrule formation

Recycling and volatile loss in chondrule formation

Chemical fractionations of chondrites: signatures of events before chondrule formation

Models of Chondrule Formation

A concise guide to chondrule formation models

Models for multiple heating mechanisms

Chondrule formation in the accretional shock

The protostellar jet model of chondrule formation

Chondrule formation in lightning discharges: status of theory and experiments

Chondrules and their associates in ordinary chondrites: a planetary connection?

Collision of icy and slightly differentiated bodies as an origin for unequilibriated ordinary chondrites

A chondrule-forming scenario involving molten planetisimals

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