The Tissint meteorite fell on July 18, 2011 in Morocco and was quickly recovered, allowing the investigation of a new unaltered sample from Mars. We report new high‐field strength and highly siderophile element (HSE) data, Sr‐Nd‐Hf‐W‐Os isotope analyses, and data for cosmogenic nuclides in order to examine the history of the Tissint meteorite, from its source composition and crystallization to its irradiation history. We present high‐field strength element compositions that are typical for depleted Martian basalts (0.174 ppm Nb, 17.4 ppm Zr, 0.7352 ppm Hf, and 0.0444 ppm W), and, together with an extended literature data set for shergottites, help to reevaluate Mars’ tectonic evolution in comparison to that of the early Earth. HSE contents (0.07 ppb Re, 0.92 ppb Os, 2.55 ppb Ir, and 7.87 ppb Pt) vary significantly in comparison to literature data, reflecting significant sample inhomogeneity. Isotope data for Os and W (¹⁸⁷Os/¹⁸⁸Os = 0.1289 ± 15 and an ε¹⁸²W = +1.41 ± 0.46) are both indistinguishable from literature data. An internal Lu‐Hf isochron for Tissint defines a crystallization age of 665 ± 74 Ma. Considering only Sm‐Nd and Lu‐Hf chronometry, we obtain, using our and literature values, a best estimate for the age of Tissint of 582 ± 18 Ma (MSWD = 3.2). Cosmogenic radionuclides analyzed in the Tissint meteorite are typical for a recent fall. Tissint's pre‐atmospheric radius was estimated to be 22 ± 2 cm, resulting in an estimated total mass of 130 ± 40 kg. Our cosmic‐ray exposure age of 0.9 ± 0.2 Ma is consistent with earlier estimations and exposure ages for other shergottites in general.

中文翻译：

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Tissint陨石的历史，从其在火星上的结晶到其在太空中的暴露：新的地球化学，同位素和宇宙成因核素数据

Tissint陨石于2011年7月18日坠落在摩洛哥，并很快被回收，从而可以对火星上未经改变的新样本进行调查。我们报告了新的高场强度和高度亲铁元素（HSE）数据，Sr-Nd-Hf-W-Os同位素分析以及宇宙成因核素数据，以便从其来源组成和结晶中检查天铁陨石的历史到其照射历史。我们介绍了典型的贫化火星玄武岩（0.174 ppm Nb，17.4 ppm Zr，0.7352 ppm Hf和0.0444 ppm W）的高场强元素组成，并结合了黑云母的扩展文献数据集，有助于重新评估火星与早期地球的构造演化相比。与文献数据相比，HSE含量（0.07 ppb Re，0.92 ppb Os，2.55 ppb Ir和7.87 ppb Pt）差异很大，反映出明显的样品不均匀性。Os和W（¹⁸⁷ OS / ¹⁸⁸ OS = 0.1289±15和ε ¹⁸² W = 1.41±0.46）都从文献数据区分。Tissint内部的Lu-Hf等时线定义了665±74 Ma的结晶年龄。仅考虑Sm-Nd和Lu-Hf计时码表，我们使用我们的文献值获得关于Tissint年龄582±18 Ma（MSWD = 3.2）的最佳估计。在Tissint陨石中分析的宇宙成因放射性核素是最近秋天的典型现象。Tissint的大气压前半径估计为22±2 cm，因此估计总质量为130±40 kg。我们的宇宙射线暴露年龄为0.9±0.2 Ma，这与较早的估计和一般其他黑云母的暴露年龄是一致的。