山西兴县下奥陶统亮甲山组叠层石:古环境与古地理意义  

STROMATOLITES FROM THE EARLY ORDOVICIAN LIANGJIASHAN FORMATION OF XINGXIAN,SHANXI PROVINCE:IMPLICATIONS FOR PALEOENVIRONMENT AND PALEOGEOGRAPHY

作　　者：刘杰[1,2] 孟凡巍 陈中阳 续琰祺[4] LIU Jie;MENG Fanwei;CHEN Zhongyang;XU Yanqi(State Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process,China University of Mining and Technology,Xuzhou 221116;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116;State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008;Geological Survey of Jiangsu Province,Nanjing Geological Museum,Nanjing 210018)

机构地区：[1]中国矿业大学煤层气资源与成藏过程教育部重点实验室,徐州221116 [2]中国矿业大学资源与地球科学学院,徐州221116 [3]中国科学院南京地质古生物研究所古生物学与油气地层应用全国重点实验室,南京210008 [4]江苏省地质调查院南京地质博物馆,南京210018

出　　处：《微体古生物学报(中英文)》2025年第1期1-9,共9页Acta Micropalaeontologica Sinica

基　　金：江苏省自然科学基金(BK20210992)资助。

摘　　要：叠层石在前寒武纪时期广布并繁盛,在中元古代(约从16亿年前到10亿年前)达到顶峰;在这一峰值之后,持续衰落。随后,叠层石在寒武纪和早奥陶世经历了复苏,但之后再次衰落至今。奥陶纪早期,叠层石在华北的河北、山东等地都有报道。本次研究在山西兴县的吕家沟−木崖头奥陶系剖面底部的亮甲山组中,发现了一套水平延伸、大范围分布的Stratifera属层叠层石,并伴生溶蚀孔洞。层叠层石属Stratifera的出现,吻合潮上带的环境,暗示了奥陶纪早期海侵背景下的一次短暂的海平面下降事件。The stromatolites were widely distributed and thrived during the Precambrian era,reaching their peak in the Mesoproterozoic period,approximately 1.6 billion to 1 billion years ago.After this peak,their numbers began to decrease.However,the stromatolites saw a resurgence during the Cambrian and Early Ordovician periods and then to decline once more up to the present.In the Early Ordovician,the stromatolites have been documented in regions such as Hebei and Shandong in North China.This study identified a set of horizontally extended and widely distributed strata of the genus Stratifera at the base of the Liangjiashan Formation from the Lvjiagou−Muyaotou profile,located in Xingxian County,Shanxi Province,along with the dissolution cavities.The presence of the genus Stratifera normally corresponds with the sedimentary environment of the supratidal and intertidal zones,indicating a short sea-level drop in the context of the Early Ordovician transgression.

关 键 词：叠层石 海平面 古地理 亮甲山组 奥陶纪 

分 类 号：P534.42[天文地球—古生物学与地层学]