Before revision: Bulk sediment Nd and Sr Nd model age, ultimate protolith or source URL Bulk sediment Pb isotopes Complicated Pb isotopes systematics makes it powerful tool to exam a source rock's geologic history especially in ancient heritage.
After revision: Bulk sediment Nd and Sr Nd model age, ultimate protolith or source area Bulk sediment Pb isotopes Complicated Pb isotopes systematics makes it powerful tool to exam a source rock's geologic history especially in ancient heritage.