西准噶尔和华南晚泥盆世-早石炭世介形类古生物、古生态和生物古地理
发布时间：2018-08-19 12:54
【摘要】：介形类(或介形虫)是节肢动物门甲壳纲的一个亚纲,自早奥陶世一直繁盛至今,分布于全球自然界的各类水体当中。本文基于西准噶尔和华南地区晚泥盆-早石炭世7条剖面、816件样品、15000余枚介形类壳体,对介形类的生物地层、古生态、生物古地理、个体发育和演化及其对晚泥盆世弗拉阶-法门阶(F-F)之交事件的响应等方面进行了综合研究。鉴定出晚泥盆世-早石炭世介形类59属145种,包括1新属和10新种;建立洪古勒楞组介形类2带2亚带;建立了活动板块边缘岛弧区介形类三类生态组合。讨论了介形类对晚泥盆世F-F之交古海洋环境变化的响应:底栖介形类受到事件影响的程度随着水深加大而逐步降低;严重缺氧和快速的温度波动会导致底栖介形类丰度、分异度降低。总结了古生代速足介目Cribroconcha属两条演化谱系,其总体模式是由不具刺到具刺演变;该属在发展演化过程中具有生态变迁特点。建立了全球晚泥盆世弗拉期和法门期底栖介形类数据库,运用定量生物学方法将弗拉期介形类划分为四个生物地理单元,法门期介形类划分为五个生物地理单元;影响弗拉期生物古地理分区的首要因素是气候分带,而法门期生物古地理分区的主控因素是板块运动引起的地理格局调整。该研究填补了西准噶尔晚古生代介形类研究的空白,丰富了华南地区古生物资料,对古生代介形类的古生态、生物古地理、谱系演化及晚泥盆世F-F事件的研究提供了新材料、新认识和新思路。
[Abstract]:The ostracoda (or ostracoda) is a subclass of Arthropoda crustacea, which has flourished since the early Ordovician and has been distributed in all kinds of water bodies in the world. Based on 7 sections of late Devonian and early Carboniferous in West Junggar and South China, there are more than 15000 ostracods in 7 sections of late Devonian and early Carboniferous. The biostratigraphy, paleoecology and biopaleogeography of ostracods are analyzed. The ontogeny and evolution and its response to the F-F intersecting events in the late Devonian have been comprehensively studied. There are 59 genera and 145 species of late Devonian and early Carboniferous ostracods, including 1 new genus and 10 new species, 2 subzones of Ostracodes and 2 subzones of the Hongguoleleng formation, and 3 types of ostracostra and 3 ecological assemblages in the island arc zone of the active plate margin. The response of ostracods to the late Devonian F-F intersecting paleo-marine environment is discussed: the degree of benthic ostracods affected by events decreases gradually with the increase of water depth, and severe hypoxia and rapid temperature fluctuations lead to benthic ostracod abundance. The degree of differentiation decreases. In this paper, two evolutionary lineages of Cribroconcha genus in Paleozoic are summarized. Its general pattern is from non-spiny to spiny, and the genus has the characteristics of ecological change in the course of development and evolution. The global late Devonian benthic ostracods databases were established. The Fla ostracods were divided into four biogeographic units and the Famen ostracods were divided into five biogeographic units by quantitative biological method. Climatic zonation is the primary factor affecting biogeogeographic zoning in Fla period, while the main controlling factor of biogeogeographic zoning in Famen period is the adjustment of geographical pattern caused by plate movement. This study fills up the blank in the study of late Paleozoic ostracods in West Junggar, enriches the paleontological data in South China, and provides new materials for the study of paleoecology, biogeography, lineage evolution and F-F events of late Devonian in the Paleozoic. New understanding and new ideas.
【学位授予单位】：中国地质大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：Q915
，
本文编号：2191709
[Abstract]:The ostracoda (or ostracoda) is a subclass of Arthropoda crustacea, which has flourished since the early Ordovician and has been distributed in all kinds of water bodies in the world. Based on 7 sections of late Devonian and early Carboniferous in West Junggar and South China, there are more than 15000 ostracods in 7 sections of late Devonian and early Carboniferous. The biostratigraphy, paleoecology and biopaleogeography of ostracods are analyzed. The ontogeny and evolution and its response to the F-F intersecting events in the late Devonian have been comprehensively studied. There are 59 genera and 145 species of late Devonian and early Carboniferous ostracods, including 1 new genus and 10 new species, 2 subzones of Ostracodes and 2 subzones of the Hongguoleleng formation, and 3 types of ostracostra and 3 ecological assemblages in the island arc zone of the active plate margin. The response of ostracods to the late Devonian F-F intersecting paleo-marine environment is discussed: the degree of benthic ostracods affected by events decreases gradually with the increase of water depth, and severe hypoxia and rapid temperature fluctuations lead to benthic ostracod abundance. The degree of differentiation decreases. In this paper, two evolutionary lineages of Cribroconcha genus in Paleozoic are summarized. Its general pattern is from non-spiny to spiny, and the genus has the characteristics of ecological change in the course of development and evolution. The global late Devonian benthic ostracods databases were established. The Fla ostracods were divided into four biogeographic units and the Famen ostracods were divided into five biogeographic units by quantitative biological method. Climatic zonation is the primary factor affecting biogeogeographic zoning in Fla period, while the main controlling factor of biogeogeographic zoning in Famen period is the adjustment of geographical pattern caused by plate movement. This study fills up the blank in the study of late Paleozoic ostracods in West Junggar, enriches the paleontological data in South China, and provides new materials for the study of paleoecology, biogeography, lineage evolution and F-F events of late Devonian in the Paleozoic. New understanding and new ideas.
【学位授予单位】：中国地质大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：Q915
，
本文编号：2191709
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