Young asteroidal fluid activity revealed by absolute age from apatite in carbonaceous chondrite.
Chondritic meteorites, consisting of the materials that have formed in the early solar system (ESS), have been affected by late thermal events and fluid activity to various degrees. Determining the timing of fluid activity in ESS is of fundamental importance for understanding the nature, formation, evolution and significance of fluid activity in ESS. Previous investigations have determined the relative ages of fluid activity with short-lived isotope systematics. Here we report an absolute207Pb/206Pb isochron age (4,450±50 Ma) of apatite from Dar al Gani (DaG) 978, a type ∼3.5, ungrouped carbonaceous chondrite. The petrographic, mineralogical and geochemical features suggest that the apatite in DaG 978 should have formed during metamorphism in the presence of a fluid. Therefore, the apatite age represents an absolute age for fluid activity in an asteroidal setting. An impact event could have provided the heat to activate this young fluid activity in ESS.
State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, China.|Department of Natural History Sciences, Hokkaido University, Sapporo 060-0810, Japan.
Ai-Cheng
AC
Zhang
State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China.
Qiu-Li
QL
Li
Department of Natural History Sciences, Hokkaido University, Sapporo 060-0810, Japan.|Isotope Imaging Laboratory, Creative Research Institution Sousei, Hokkaido University, Sapporo 001-0021, Japan.
Hisayoshi
H
Yurimoto
Isotope Imaging Laboratory, Creative Research Institution Sousei, Hokkaido University, Sapporo 001-0021, Japan.
Naoya
N
Sakamoto
State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China.
Xian-Hua
XH
Li
Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China.
Sen
S
Hu
Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China.
Yang-Ting
YT
Lin
State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, China.
Ru-Cheng
RC
Wang
Nature. 2014 Jan 23;505(7484):525-7
24451541
Science. 2015 Apr 17;348(6232):321-3
25883354
Nature. 1984 Jan 19;307(5948):249-51
11541964
Science. 2013 Nov 29;342(6162):1069-73
24200813
Science. 2002 Sep 6;297(5587):1678-83
12215641
Science. 1999 Aug 27;285(5432):1377-9
10464091