The biological affinity ofAmsassia: new evidence from the Ordovician of North China

Palaeontology ◽  
2014 ◽  
Vol 57 (5) ◽  
pp. 1067-1089 ◽  
Author(s):  
Ning Sun ◽  
Robert J. Elias ◽  
Dong-Jin Lee
Keyword(s):  
North China ◽  
Biological Affinity ◽  
New Evidence

scholarly journals Diversified calcimicrobes in dendrolites of the Zhangxia Formation, Miaolingian Series (Middle Cambrian) of the North China craton

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Ming-Xiang Mei ◽  
Muhammad Riaz ◽  
Zhen-Wu Zhang ◽  
Qing-Fen Meng ◽  
Yuan Hu
Keyword(s):  
North China ◽  
Cyanobacterial Mats ◽  
Third Order ◽  
Depositional Sequence ◽  
Middle Cambrian ◽  
Forming Mechanism ◽  
The North ◽  
Biological Affinity ◽  
History Of ◽  
Group 3

AbstractAs a type of non-laminated microbial carbonates, dendrolites are dominated by isolated dendritic clusters of calcimicrobes and are distinct from stromatolites and thrombolites. The dendrolites in the upper part of the Miaolingian Zhangxia Formation at Anjiazhuang section in Feicheng city of Shandong Province, China, provide an excellent example for further understanding of both growth pattern and forming mechanism of dendrolites. These dendrolites are featured by sedimentary fabrics and composition of calcified microbes as follows. (1) The strata of massive limestones, composed of dendrolites with thickness of more than one hundred meters, intergrade with thick-bedded to massive leiolites, formimg the upper part of a third-order depositional sequence that constitutes a forced regressive systems tract. (2) A centimeter-sized bush-like fabric (shrub) typically produced by calcified microbes is similar to the mesoclot in thrombolites but distinctive from clotted fabrics of thrombolites. This bush-like fabric is actually constituted by diversified calcified microbes like the modern shrub as a result of gliding mobility of filamentous cyanobacteria. Such forms traditionally include: the Epiphyton group (which actually has uncertain biological affinity), the Hedstroemia group which closely resembles modern rivulariacean cyanobacteria, and the possible calcified cyanobacteria of the Lithocodium–Bacinella group. (3) Significantly, dense micrite of leiolite is associated with sponge fossils and burrows, and is covered by microstromatolite. The Lithocodium–Bacinella group is a controversial group of interpreted calcified cyanobacteria in the Cambrian that has also been widely observed and described in the Mesozoic. Therefore, dendrolites with symbiosis of leiolites in the studied section provide an extraordinary example for further understanding of growing style of bush-like fabrics (shrubs) of the dendrolites dominated by cyanobacterial mats. Furthermore, the present research provides some useful thinking approaches for better understanding of the history of the Early Paleozoic skeletal reefs and the microbe–metazoan transitions of the Cambrian.

SHRIMP zircon age of a Proterozoic rapakivi granite batholith in the Gyeonggi massif (South Korea) and its geological implications

2005 ◽  
Vol 142 (1) ◽  
pp. 23-30 ◽  
Author(s):  
MINGGUO ZHAI ◽  
ZHIYAO NI ◽  
CHANG WHAN OH ◽  
JINGHUI GUO ◽  
SEON GYU CHOI
Keyword(s):  
South Korea ◽  
North China ◽  
Granulite Facies ◽  
Iron Formation ◽  
Rapakivi Granite ◽  
Banded Iron Formation ◽  
The North ◽  
Gyeonggi Massif ◽  
Granite Batholith ◽  
New Evidence

A large rapakivi granite batholith in the Neo-Archaean/Palaeoproterozoic Odesan complex, northeastern Gyeonggi massif, South Korea, has been dated at 1839±10 Ma using SHRIMP U–Pb analysis of zircons. The age, petrological and geochemical characteristics of this batholith are similar to those of the rapakivi granite batholiths exposed in the Rangnim massif of North Korea and in the Miyun–Chengde complex of North China. The country rocks of these rapakivi granite batholiths are also comparable; all are composed of granitic gneisses and banded iron formation (BIF)-bearing supracrustal rocks metamorphosed to amphibolite- to granulite-facies. This study provides new evidence for the suggestion that the Gyeonggi and Rangnim massifs may share an affinity with the Precambrian basement of the North China craton. The study provides new insight into the possible eastward extension of the Sulu orogenic belt in the Korean peninsula and further provides evidence to correlate the Korea basement to a possible global 2.1–1.8 Ga supercontinent.

New evidence for Neoarchean (ca. 2.7 Ga) crustal growth in the North China Craton

2020 ◽  
Vol 350 ◽  
pp. 105921
Author(s):  
Chunrong Diwu ◽  
Tingyi Wang ◽  
Jianghao Yan
Keyword(s):  
North China Craton ◽  
North China ◽  
Crustal Growth ◽  
The North ◽  
New Evidence

3.6 Ga lower crust in central China: New evidence on the assembly of the North China craton

Geology ◽  
2004 ◽  
Vol 32 (3) ◽  
pp. 229 ◽  
Author(s):  
Jianping Zheng ◽  
W.L. Griffin ◽  
Suzanne Y. O'Reilly ◽  
Fengxiang Lu ◽  
Chunyang Wang ◽  
...  
Keyword(s):  
North China Craton ◽  
Lower Crust ◽  
North China ◽  
Central China ◽  
The North ◽  
New Evidence

scholarly journals Rapid lithospheric thinning of the North China Craton: New evidence from cretaceous mafic dikes in the Jiaodong Peninsula

2016 ◽  
Vol 432 ◽  
pp. 1-15 ◽  
Author(s):  
Liang Ma ◽  
Shao-Yong Jiang ◽  
Albrecht W. Hofmann ◽  
Yi-Gang Xu ◽  
Bao-Zhang Dai ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Lithospheric Thinning ◽  
The North ◽  
Jiaodong Peninsula ◽  
New Evidence
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