Changhsingian radiolarian fauna from Anshun of Guizhou, and its relationship to TOC and paleo-productivity

Abundant siliceous micro-fossils were found from the Dalong Formation, Xinmin section, Guizhou, which include nine spe- cies of radiolarians belonging to seven genera as well as nine types of siliceous spongy spicules. The radiolarian fauna consists of all spherical radiolarians, without any species...

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Published inScience China. Earth sciences Vol. 56; no. 8; pp. 1334 - 1342
Main Authors Xiang, Yu, Feng, QingLai, Shen, Jun, Zhang, Ning
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2013
Springer Nature B.V
Subjects
Earth and Environmental Science
Earth science
Earth Sciences
Fauna
Fossils
Marine
Organic carbon
Radiolaria
Research Paper
Sedimentary geology
Sedimentation & deposition
Shallow water
Silica
TOC
古生产力
安顺
微体化石
放射虫动物群
放射虫组合
海绵骨针
贵州
Changhsingian
South China
radiolarian
paleo-productivity
TOC
biogenic silicon
Guizhou
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Summary:Abundant siliceous micro-fossils were found from the Dalong Formation, Xinmin section, Guizhou, which include nine spe- cies of radiolarians belonging to seven genera as well as nine types of siliceous spongy spicules. The radiolarian fauna consists of all spherical radiolarians, without any species of Albaillellaria and Latentifistularia, indicating a relative shallow water sedimentary environment. The high relative co-efficient between the radiolarian abundance and total organic carbon （TOC） shows that the radiolarian assemblage represented by Copicyntra and Paracopicyntra can be used as a proxy to the paleo-productivity. However, the relative co-efficient between biogenic silica and the radiolarian and sponge spicule abun- dances is low. A possible explanation is that an oceanic circulation has changed the biogenic silica content after radiolarian test and siliceous spongy spicule were dissolved.
Bibliography:11-5843/P
XIANG Yu, FENG QlngLa , SHEN Jun ＆ ZHANG Ning State Key Laboratory of Geological Process and Mineral Resources, China University of Geosciences, Wuhan 430074, China 2 State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
Abundant siliceous micro-fossils were found from the Dalong Formation, Xinmin section, Guizhou, which include nine spe- cies of radiolarians belonging to seven genera as well as nine types of siliceous spongy spicules. The radiolarian fauna consists of all spherical radiolarians, without any species of Albaillellaria and Latentifistularia, indicating a relative shallow water sedimentary environment. The high relative co-efficient between the radiolarian abundance and total organic carbon （TOC） shows that the radiolarian assemblage represented by Copicyntra and Paracopicyntra can be used as a proxy to the paleo-productivity. However, the relative co-efficient between biogenic silica and the radiolarian and sponge spicule abun- dances is low. A possible explanation is that an oceanic circulation has changed the biogenic silica content after radiolarian test and siliceous spongy spicule were dissolved.
Guizhou, Changhsingian, radiolarian, biogenic silicon, paleo-productivity, TOC, South China
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-7313
1869-1897
DOI:10.1007/s11430-013-4615-4