The reliability of paleomagnetic data
The reliability of paleomagnetic data
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DOI：
10.1016/0040-1951(90)90116-p
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发表时间：
1990-11
期刊：
影响因子：
2.9
通讯作者：
R. Voo
中科院分区：
文献类型：
--
作者：
R. Voo
一组七个可靠性标准已被应用到以前出版的古生代欧洲和北美的古地磁数据库和非洲的晚前寒武纪数据集。根据满足的标准数量，为结果分配质量因子（0 <$Q <$7）。三个标准，处理年龄的可靠性，结构控制和实验室退磁分析被认为是最重要的，这些是满足绝大多数的结果，而大多数（高达80%）的非洲晚前寒武纪的结果，这些标准没有得到满足。以限制磁化年龄的测试为基础的标准，例如处理褶皱、砾岩、接触或反转的标准，可提高结果的可靠性;对于中生代，他们通常对大约三分之一的数据感到满意，但对于前寒武纪，只有少数结果包含了这样的检验。在这项研究中，我们断言，这些标准确实定性地描述了结果的可靠性，广义而言，因此平均满足大多数标准（Q ≥ 4）的数据集可以被描述为比平均Q = 2的数据集更稳健。统计评估说明了鲁棒性的古地磁数据集之间的差异，研究广泛的古生代和更不确定的晚前寒武纪。
A set of seven reliability criteria has been applied to a previously published Phanerozoic paleopole database for Europe and North America and a Late Precambrian data set for Africa. A quality factor (0 ⩽Q⩽ 7) is assigned to a result, based on the number of criteria satisfied. Three criteria, dealing with age reliability, structural control and laboratory demagnetization analysis are deemed the most important; for the Phanerozoic results these are satisfied by a large majority of the results, whereas for the majority (up to 80%) of the African Late Precambrian results such criteria are not met. Criteria based on tests that constrain the age of the magnetization, such as those dealing with folds, conglomerates, contacts or reversals, enhance the reliability of a result; for the Phanerozoic, they are generally satisfied by about one third of the data, but for the Precambrian only a few results incorporate such tests.The assertion is made in this study that these criteria indeed qualitatively describe the reliability of results in broad terms, so that a data set satisfying on average most of the criteria (Q⩾ 4) can be described as more robust than a data set with averageQ= 2. Statistical evaluations illustrate the difference in robustness of paleopole data sets between the well-studied Phanerozoic Era and the much more uncertain Late Precambrian.