【摘 要】
：
河南信阳一带位于黄淮平原西南部,其淮河以南岗地上部的胡族铺组,14C、OSL年龄为130ka～13ka,孢粉反映其主体为湖泊沉积环境.130ka～30kaB.P.早期气候由中更新世末期的湿热突变为暖温偏干,湖盆收缩;晚期气候逐渐变为暖温微湿,湖盆扩大.30ka～ 25kaB.P.初期开始气候暖温偏湿,湖盆快速扩大;早期气候有变干的趋势,湖盆收缩;中早期气候暖温偏湿-湿热,湖盆扩大;中晚期气候暖温偏
【机 构】
：
河南省地质调查院,河南郑州,450051 河南省地矿局第三地质探矿队,河南洛阳,471023
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河南信阳一带位于黄淮平原西南部,其淮河以南岗地上部的胡族铺组,14C、OSL年龄为130ka～13ka,孢粉反映其主体为湖泊沉积环境.130ka～30kaB.P.早期气候由中更新世末期的湿热突变为暖温偏干,湖盆收缩;晚期气候逐渐变为暖温微湿,湖盆扩大.30ka～ 25kaB.P.初期开始气候暖温偏湿,湖盆快速扩大;早期气候有变干的趋势,湖盆收缩;中早期气候暖温偏湿-湿热,湖盆扩大;中晚期气候暖温偏湿,湖盆收缩;晚期气候暖温,湖盆收缩.25ka～ 13kaB.P.初期气候暖温,湖盆扩大;早期气候温暖,湖盆萎缩—消亡;中期气候暖温偏干,泛滥平原—洪泛盆地环境;晚期气候暖湿,河流环境;13kaB.P.后总体处于剥蚀状态,总体反映湖泊发展、消失的演化过程.
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