The PINT database: a definitive compilation of absolute palaeomagnetic intensity determinations since 4 billion years ago
The PINT database: a definitive compilation of absolute palaeomagnetic intensity determinations since 4 billion years ago
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DOI：
10.1093/gji/ggab490
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发表时间：
2022-01-03
影响因子：
2.8
通讯作者：
Biggin, Andrew J.
中科院分区：
文献类型：
--
作者：
Bono, Richard K.;Paterson, Greig A.;Biggin, Andrew J.
古地磁场强度的测量，来自岩石的年龄跨越地质时间，提供了一个重要的制约地球深部内部的演变和它的磁环境。PINT数据库已更新到v.8.0.0版本，包括从50 ka到4.2 Ga的古强度站点平均记录，汇编了从1959年到2019年底的古地磁社区的工作。几乎所有的站点平均古地震烈度记录都使用古地震烈度的质量可靠性（Q（PI））框架进行了评估。这一更新的数据库将之前的Q（PI）和PINT汇编工作整合到一个统一的数据库中，称为PINT数据库，并纳入了自2014年以来评估Q（PI）的最新工作。PINT数据库的时空分布进行了分析，揭示了大量的偏向年轻的记录（从Brunhes时）在北方半球，和间隔很少或没有palaeointensity数据的持续时间为10秒至100秒的数百万年的古生代和前寒武纪。PINT数据库的一般Q（PI）依从性特征显示，中位Q（PI）评分范围为2 - 3（总分为10分），2000年后发表的研究中Q（PI）评分呈上升趋势。这说明了社区越来越意识到需要什么来建立对古烈度数据的信心，以及可以用这些数据进行的大规模解释的鲁棒性越来越强。此外，我们提出了一个长期的平均偶极场强度的描述与描述性统计的不同间隔的地球历史。
Palaeomagnetic field intensity measurements, derived from rocks with ages that span geological time, provide a crucial constraint on the evolution of Earth's deep interior and its magnetic environment. The palaeointensity database PINT has been updated to version v.8.0.0 and includes palaeointensity site-mean records spanning an interval from 50 ka to 4.2 Ga, compiling efforts from the palaeomagnetic community spanning from 1959 to the end of 2019. Nearly all site-mean palaeointensity records have been assessed using the qualitative reliability of palaeointensity (quality of palaeointensity, Q(PI)) framework. This updated database brings together and harmonizes prior Q(PI) and PINT compilation efforts into a unified database referred to as the PINT database, incorporating recent efforts since 2014 to assess Q(PI). The spatio-temporal distribution of the PINT database is analysed, revealing substantial biases towards young records (from the Brunhes chron) in the Northern hemisphere, and intervals with little to no palaeointensity data with a duration of 10s to 100s of millions of years in the Palaeozoic and Precambrian. General Q(PI) compliance is characterized for the PINT database, which shows that the median Q(PI) scores range from 2 to 3 (out of a total possible score of 10), with a positive trend towards increasing Q(PI) scores in studies published after the year 2000. This illustrates an increasing community awareness of what is required to establish confidence in palaeointensity data and an increasing robustness of the large scale interpretations that can be made with these data. We additionally present a description of the long-term average dipole field strength with descriptive statistics for distinct intervals of Earth history.