古亚洲洋的发生—发展—消亡的历史——来自黑龙江省西北部古生代(O_1—C_1)地层的连续沉积记录
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摘要
黑龙江省西北部发育连续沉积的古生代(O1—C1)地层.结合该地区近年来的区域地质调查和科学研究成果,将该地区奥陶纪—石炭纪岩石地层划分为伊勒呼里山群、黑河群和燎原群3个群15个组,并将各组的岩石建造、化石组合、沉积环境等与古亚洲洋发生、发展、消亡演化历史结合在一起进行论述分析.通过古生代(O1—C1)地层方面的综合研究,为黑龙江省西北部古亚洲洋演化提供了岩石地层、生物地层和沉积环境方面的综合资料.根据上述地层记录,认为古亚洲洋发生于早奥陶世早期,兴盛于早奥陶世晚期—晚奥陶世,收敛期为早志留世—晚志留世—中泥盆世、消亡于晚泥盆世—早石炭世.
A series of Paleozoic strata(O1-C1) is widely distributed in the northwest of Heilongjiang Province.Combining the regional geological survey and scientific research results in recent years,the Ordovician-Carboniferous strata can be divided into three groups(Yilehulishan,Heihe and Liaoyuan Groups) with fifteen formations. The rock structures,fossil assemblages,sedimentary environments of each formation are discussed together with the open,evolution and extinction history of the Paleo-Asian Ocean. The integrated study on the Paleozoic strata provides such comprehensive data as lithostratigraphy,biostratigraphy and sedimentary environment for the evolution of the Ocean.According to the above stratigraphic records,it is thought that the Paleo-Asian Ocean was opened in the early stage of Early Ordovician,developed in the late Early Ordovician-Late Ordovician,converged in Early Silurian-Late SilurianMiddle Devonian and closed in Late Devonian-Early Carboniferous.
A series of Paleozoic strata(O1-C1) is widely distributed in the northwest of Heilongjiang Province.Combining the regional geological survey and scientific research results in recent years,the Ordovician-Carboniferous strata can be divided into three groups(Yilehulishan,Heihe and Liaoyuan Groups) with fifteen formations. The rock structures,fossil assemblages,sedimentary environments of each formation are discussed together with the open,evolution and extinction history of the Paleo-Asian Ocean. The integrated study on the Paleozoic strata provides such comprehensive data as lithostratigraphy,biostratigraphy and sedimentary environment for the evolution of the Ocean.According to the above stratigraphic records,it is thought that the Paleo-Asian Ocean was opened in the early stage of Early Ordovician,developed in the late Early Ordovician-Late Ordovician,converged in Early Silurian-Late SilurianMiddle Devonian and closed in Late Devonian-Early Carboniferous.
引文
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(1)黑龙江省区域地质调查所.1/5万东马扎尔河幅区域地质矿产调查报告.2014.
[2]黑龙江省地质矿产局.黑龙江省岩石地层[M].武汉:中国地质大学出版社,1997:23-63.
[3]浦全生,曲关生.关于安娘娘桥组时代的新资料及层位的新认识[J].黑龙江地质,1994,5(3):8-13.
[4]徐东海,梁福来,浦全生.自然科学与博物馆研究(第三卷)[M].北京:高等教育出版社,2007:131-141.
[5]李晓英,浦全生,张晓博,等.黑龙江北部燎原地区燎原群的建立及其意义[J].西北地质,2012,45(2):126-135.
[6]浦全生,赵海山.黑龙江省多宝山地区奥陶系的浊积岩[J].黑龙江地质,1999,10(2):29-33.
[7]浦全生,梁科伟,梁福来.黑龙江省奥陶纪浊积岩及金矿床找矿远景[J].世界地质,2007(2):173-179.
(1)黑龙江省区域地质调查所.1/5万东马扎尔河幅区域地质矿产调查报告.2014.