晚古生代冰川活动在晚石炭-早二叠世达到鼎盛并随后趋于衰减，全球气候由冰室向温室转变。高纬地区冰川活动的沉积和地层记录是气候变化的直接指标，而低纬地区的旋回沉积和碳酸盐岩-生物壳C-O同位素则为气候变化提供间接指示，两者可大致对比反映全球气候变化。然而，晚古生代冰期气候变化的全球对比仍受限于高纬和低纬地区间地层时代的不确定性和气候指标的不对等性。华北板块在晚石炭-早二叠世处于低纬地区，沉积序列以碎屑岩为主，夹有多层凝灰岩和灰岩,适合与高纬碎屑岩沉积进行对比研究。本项目拟以华北南部晚石炭-早二叠世沉积记录为研究对象，通过凝灰岩高精度锆石U-Pb定年，结合灰岩生物地层学提高地层年代精度，并综合砂岩物源分析和沉积相解释，识别泥岩风化地球化学和有机碳同位素指标对古气候变化的响应，进而与高纬地区进行精细时间格架下基于相同地化指标的沉积记录对比，探讨晚古生代冰期全球气候变化及气候相关因素的内在联系。

Glaciation in the late Paleozoic ice age was discrete with its acme and subsequent demise in the Late Carboniferous-Early Permian in association with the climate transition from icehouse to greenhouse. The glacial sedimentary and stratigraphic records in the high-latitude Gondwana can be correlated approximately in time with the indirect chemical indicators in the low-latitude tropical-subtropical regions represented by the cyclic sedimentary sequences and the C-O isotopes of carbonates and bio-shells, denoting climate changes in the late Paleozoic ice age. However, the uncertainty in chronostratigraphy and unequivalence in climate indicator used for climatic correlation between low and high latitudes hinder our further understanding of the global climate changes in the late Paleozoic ice age. For the Late Carboniferous-Early Permian clastic sequence in the glacial high-latitude Gondwana there have been lots of element geochemical and organic carbon isotopic data reported. While, there are few tightly age-constrained equivalent data in the low-latitude regions. North China was in the equatorial region during the Late Carboniferous-Early Permian and there developed a coal-bearing clastic sequence with volcanic tuff and marine limestone interbeds, providing a low latitudinal clastic sedimentary record to compare with the high-latitude ones. This study aims to promote the chronostratigraphic precision of this sequence based on high-precision tuff zircon dating and limestone biostratigraphy, reveal the climate significances of mudstone weathering geochemistry and organic carbon isotope composition integrated with sandstone provenance and sedimentology analysis, then make an equivalent-chemical-index based climate correlation between low and high latitude records under finer time scale, and discuss the global climate changes and climate-related factors as well.