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Back贵州绥阳双河洞科考成果发布:总长达481.5公里 增9具大熊猫化石
贵州绥阳双河洞科考成果发布:总长达481.5公里 增9具大熊猫化石
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中国新闻网2 hours agoScience2 min readChinaView translation

贵州绥阳双河洞科考成果发布:总长达481.5公里 增9具大熊猫化石

双河洞继续稳居世界第三、亚洲第一长洞,本次科考新发现巨貘与云豹骨架个体各1具

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最新科考数据显示,亚洲第一长洞贵州绥阳双河洞系统目前总长度已达481.5公里,较上次增长41.8公里。本次科考新增大熊猫个体化石9具,累计发现61具,并首次发现巨貘与云豹骨架个体各1具。

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Why It Matters

贵州绥阳双河洞进行第25次国际洞穴科学考察,由中外洞穴科考专家共同开展探测与古生物调查。

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中新社贵州绥阳9月23日电 (石小杰)最新科考数据显示,亚洲第一长洞贵州绥阳双河洞系统目前总长度已达481.5公里。新增大熊猫个体化石9具、目前已累计发现大熊猫个体化石61具。

贵州绥阳双河洞第25次国际洞穴科学考察成果发布会23日在双河洞国家地质公园举行,会上通报以上信息。

本次科考期间,中外洞穴科考专家开展洞穴探测、古生物调查与年代学样品测试,继续刷新了双河洞系统的连通长度、洞口数量以及延伸范围,不断丰富了双河溶洞群更新世晚期“大熊猫—剑齿象动物群”古生物化石(骨骼遗存)的种类和数量。

法国洞穴专家让·波塔西介绍,双河洞系统目前总长度已达481.5公里,洞穴纵深仍维持在912米,由124个洞口相连通,较第24次国际科考增长了41.8公里,新增9个洞口,实现了跨越式突破。未连通洞穴有436个洞口,总长度达165公里,洞口数量增加了25个,是双河洞系统增长的潜在空间。根据最新排名,双河洞继续稳居世界第三、亚洲第一长洞,纵深仍保持中国第三。

双河洞溶洞群得天独厚的封闭、恒温、稳定的地质环境,为古生物化石(骨骼遗存)的保存提供了绝佳场所。本次科考在古生物调查方面也取得了突破性进展,新增大熊猫个体9具、羚牛个体1具、犀牛个体1具、剑齿象个体1具。

此外,新发现巨貘与云豹骨架个体各1具,还在洞内发现2处大熊猫抓痕。其中,巨貘为幼体个体,骨骼遗存完整,为中国国内同类遗存中保存最完整的材料之一。巨貘和云豹材料在双河溶洞群的首次发现,进一步丰富了区域古生物物种记录,为研究当地古生物种群分布与物种演化提供了新的样本支撑。

本次科考还首次采用铀-铅(U-Pb)同位素定年新方法,测得双河洞次生碳酸盐沉积物最老校正年龄约为510万年,为中国西南地区迄今最古老的洞穴次生碳酸盐岩沉积样品,同期测得基岩年龄约5.1亿年,与区域地质背景吻合,两项成果为构建双河洞的长尺度演化序列提供了绝对时间标尺。

Open Questions

  • 未连通的436个洞口具体延伸情况如何?

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This article was originally published by 中国新闻网.

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