Luminescence ages and new interpretations of the timing and deposition of Quaternary sediments at Natural Trap Cave, Wyoming
Luminescence ages and new interpretations of the timing and deposition of Quaternary sediments at Natural Trap Cave, Wyoming
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发光年龄以及对怀俄明州自然陷阱洞穴第四纪沉积物时间和沉积的新解释
DOI：
10.1016/j.quaint.2022.01.005
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发表时间：
2023
影响因子：
2.2
通讯作者：
Meachen, Julie A.
中科院分区：
文献类型：
--
作者：
Mahan, Shannon;Wood, John R.;Lovelace, David M.;Laden, Juan;McGuire, Jenny L.;Meachen, Julie A.
自然陷阱洞穴位于怀俄明州中北部的大角山，有着捕获和保护一系列北美动物的历史，这些动物跌入了深深的垂直入口。这些动物遗骸被埋藏并保存在主室的沉积物中，反过来又有助于阐明最近一次冰期循环期间动物群动态的过程。洞穴位于劳伦蒂德和科迪勒拉冰盖以南，靠近黄石公园，是一个理想的地理位置，可以为北美的生态变化提供见解。动物被埋葬的沉积物告诉我们洞穴内外的运输和沉积，与集水动力学有关。我们报告了2014年和2018年在洞穴内挖掘工作期间获得的样品的一系列光释光（OSL）年龄。我们还研究了氩气，火山灰年代学，裂变径迹和发光技术，已用于了解洞穴的填充产生的年代学。洞穴沉积物年龄和现场测量的伽马能谱，在这项研究中测量有助于解决一个改进的年代模型时，结合以前的data.The套件的OSL年龄解释通过地层关系（和脊椎动物内），这需要使用一个适当的年龄模型，我们使用中央年龄模型或最小年龄模型在适当的情况下，并与理由。最低的沉积物的年代为150万年，在130至52万年的间隙。在此之上，沉积物沉积和古生物物质的夹带代表了更新世和全新世早期，介于37 ± 6 ka和7.6 ± 0.5 ka之间。地层结构表明，沉积到洞穴的材料是情节和快速的，然后是静止期，水文冲刷，重的地表流，或可能是一个冷冻水文过程可能会改变单位的关系。因此，互补的地质年代学和石英与长石发光信号的特点，改善这些复杂的矿床的时间解释。这种对混合的适应性理解也为未来的工作奠定了基础，目的是提高我们对这些洞穴沉积物中灰分单位的年龄和来源的理解。在洞穴中发现的三个火山灰单元可能代表了同一火山灰的原地改造，也可能代表了以前没有记录的黄石火山口喷发。
Natural Trap Cave, located in the Big Horn Mountains of north-central Wyoming, has a history of trapping and preserving a range of North American fauna that plummeted into the deep vertical entrance. These animal remains were buried and preserved within sediments of the main chamber and, in turn, have helped elucidate the procession of faunal dynamics during the latest glacial cycle. The cave location, south of the Laurentide and Cordilleran Ice Sheets, and proximal to Yellowstone, is at an ideal geographical juncture to provide insights to ecological changes in North America. The sediments that the animals are buried in inform us about transport and deposition both inside and outside of the cave that relate to catchment dynamics. We report on a series of optically stimulated luminescence (OSL) ages derived from samples obtained within the cave during excavation work in 2014 and in 2018. We also examine chronology produced by argon, tephrochronology, fission track, and luminescence techniques that have been used for understanding the infilling of the cave. The cave sediment ages and in situ measured gamma spectroscopy as measured in this study helped resolve an improved chronological age model when combined with previous data.The suite of OSL ages is interpreted through the stratigraphic relationships (and vertebrates contained within) which requires the use of an adequate age model; we use either the central age model or minimum age model where appropriate and with justification. Lowest sediments are dated to ∼150 ka with a hiatus at ∼130 to 52 ka. Above this, sediment deposition and entrainment of paleontological materials are representative of Pleistocene and early Holocene times, between 37 ± 6 ka and 7.6 ± 0.5 ka. The stratigraphic architecture suggests that deposition of materials into the cave is episodic and rapid, followed by quiescent periods where hydrologic scour, heavy overland flow, or possibly a cryo-hydrologic process may have altered unit relationships. Thus, the complementary geochronometers and the characteristics of quartz versus feldspar luminescence signals improve temporal interpretations of these complex deposits. This adapted understanding of mixing also sets the stage for future work with the aim to improve our understanding of ages and sources for ash units within these cave deposits. The three ash units recognized in the cave may represent an in-situ reworking of the same ash or may be representative of previously undocumented eruptions from the Yellowstone Caldera.
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影响因子：
2.7
作者：
Durcan, Julie A.;King, Georgina E.;Duller, Geoffrey A. T.
通讯作者：
Duller, Geoffrey A. T.
怀俄明州大霍恩麦迪逊石灰岩小山区铀矿床地质
DOI：
--
发表时间：
1977
期刊：
影响因子：
--
作者：
R. C. McEldowney;John F. Anshier;D. J. Lootens
通讯作者：
D. J. Lootens
天然陷阱洞穴的发掘
DOI：
--
发表时间：
1978
期刊：
影响因子：
--
作者：
L. Martin;B. Gilbert
通讯作者：
B. Gilbert
怀俄明州密西西比河下游麦迪逊石灰岩的层序演化和层次结构
DOI：
--
发表时间：
1996
期刊：
影响因子：
--
作者：
M. Sonnenfeld
通讯作者：
M. Sonnenfeld
使用 U 系列 (230Th/238U) 日期和锆石氧同位素以及粘附玻璃的化学成分，将天然陷阱洞穴火山灰与黄石公园进行关联
影响因子：
2.2
作者：
A. Schmitt;Mark T. Clementz;D. Lovelace;K. Chamberlain
通讯作者：
K. Chamberlain