The SP lava flow is a quartz-, olivine- and pyroxene-bearing basalt with an ⁴⁰Ar/³⁹Ar age of 72 ± 4 ka (2σ). The flow is preserved in the desert climate of northern Arizona, USA. Its unweathered appearance and the lack of soil development indicate it has undergone negligible erosion and/or burial, making it an ideal site for direct calibration of cosmogenic nuclide production rates. Cross-calibrated production rates and production rate ratios for cosmogenic ²¹Ne, ¹⁰Be, and ¹⁴C have been determined from SP flow quartz. Production rate ratios for ²¹Ne/¹⁰Be, ²¹Ne/¹⁴C, and ¹⁴C/¹⁰Be are based on the total, local production rates of each cosmogenic nuclide, independent of scaling models, and have error-weighted means (±2σ uncertainty) of 4.44 ± 0.32, 1.43 ± 0.10, and 2.85 ± 0.21, respectively. Error-weighted mean, sea-level, high latitude (SLHL) total reference production rates of ²¹Ne, ¹⁰Be, and ¹⁴C are 17.0 ± 1.1, 3.84 ± 0.27, and 11.2 ± 0.6 at/g/yr (2σ), respectively, using time-independent Lal (1991)/Stone (2000) (St) scaling factors. St scaled spallogenic ¹⁰Be and ¹⁴C rates are 3.73 ± 0.26 and 9.2 ± 0.6 at/g/yr, respectively. ²¹Ne and ¹⁰Be production rates are integrated over the past 72 ka, whereas ¹⁴C production rates are integrated over 25 ka, the time at which SP flow quartz has reached saturation with respect to ¹⁴C. These rates overlap within 2σ uncertainty with other St-scaled production rates in the literature, including the total reference SLHL ²¹Ne production rate of Niedermann (2000), which is revised in this paper to 16.8 ± 3.3 at/g/yr (2σ; St scaling) to reflect a recent change in age control at the Sierra Nevada sites. All SLHL production rates are lower if time-dependent Sf, Sa, and Lm scaling factors are used. For example, error-weighted mean, sea-level, high latitude (SLHL) total reference production rates for ¹⁰Be as calculated in the CREp online calculator range from 3.49 ± 0.23 to 3.74 ± 0.25 at/g/yr (2σ), using time-dependent Lm scaling factors. Commonly used SLHL ¹⁰Be and ¹⁴C production rates in the literature were calibrated on surfaces that have been exposed to cosmic rays for less than 20 ka. Between 20 and 50 ka, the geomagnetic field is proposed to have been weaker than it is today. Production rates of cosmogenic nuclides increase during periods of weaker geomagnetic field strength. However, our study finds no measureable difference between St-scaled production rates of cosmogenic ²¹Ne and ¹⁰Be over the past 20 ka and St-scaled ²¹Ne and ¹⁰Be production rates over the past 72 ka. As such, the study suggests that ²¹Ne and ¹⁰Be production rates in quartz were not significantly greater during the proposed period of decreased magnetic strength from 20 to 50 ka.

SP熔岩流是含石英，橄榄石和辉石的玄武岩，⁴⁰ Ar / ³⁹ Ar年龄为72±4 ka（2σ）。流量被保存在美国亚利桑那州北部的沙漠气候中。它的未风化外观和缺乏土壤发育表明它已经遭受了微不足道的侵蚀和/或埋葬，使其成为直接校准宇宙性核素生产率的理想场所。已从SP流动石英中确定了宇宙定性²¹ Ne，¹⁰ Be和¹⁴ C的交叉校准生产率和生产率比率。²¹ Ne / ¹⁰ Be，²¹ Ne / ¹⁴ C和¹⁴ C /的生产率比¹⁰ Be是基于每种宇宙成因核素的总局部生产率，与缩放模型无关，并且具有分别为4.44±0.32、1.43±0.10和2.85±0.21的误差加权平均值（不确定度为±2σ）。²¹ Ne，¹⁰ Be和¹⁴ C的误差加权平均海平面高纬度（SLHL）总参考生产率为17.0±1.1、3.84±0.27和11.2±0.6 at / g / yr（2σ），分别使用与时间无关的Lal（1991）/ Stone（2000）（St）缩放因子。St成比例的生散¹⁰ Be和¹⁴ C速率分别为3.73±0.26和9.2±0.6 at / g / yr。²¹ Ne和¹⁰如果在过去72 ka内累计生产率，而在25 ka上累计¹⁴ C生产率，则SP流动石英相对于¹⁴ C达到饱和的时间。这些生产率与其他St级规模生产在2σ不确定度内重叠文献中的比率，包括Niedermann（2000）的总参考SLHL ²¹ Ne生产率，本文将其修订为16.8±3.3 at / g / yr（2σ; St缩放），以反映在2000年时年龄控制的最新变化内华达山脉遗址。所有SLHL产率，如果较低的时间依赖于 SF，萨和Lm的使用比例因子。例如，使用CREp在线计算器计算出的¹⁰ Be的误差加权平均，海平面，高纬度（SLHL）总参考生产率在3.49±0.23至3.74±0.25 at / g / yr（2σ）的范围内，使用时间相关的Lm缩放因子。文献中常用的SLHL ¹⁰ Be和¹⁴ C生产率是在暴露于宇宙射线少于20 ka的表面上校准的。建议在20至50 ka之间，地磁场要比今天弱。在弱的地磁场强度期间，宇宙成因核素的生产率提高。但是，我们的研究发现St与过去20 ka的宇宙成因²¹ Ne和¹⁰ Be的大规模生产速率和过去72 ka的St的²¹ Ne和¹⁰ Be的大规模生产速率。因此，研究表明，在建议的磁强度从20 ka降低到50 ka的提议时期内，石英中²¹ Ne和¹⁰ Be的生产率没有明显提高。