High resolution bio- and chemostratigraphic framework at the Frasnian-Famennian boundary: Implications for regional stratigraphic correlation between different sedimentary facies in South China

With the instruction of the high resolution sequence stratigraphy and sedimentology theory, and the comprehensive application of 11 wells core, more than 800 mud logging and log data, high resolution sequence stratigraphic characteristics research in the XII Group of the Member III of Qing Shankou Formation in the Qianan oilfield has been finished. The results show that the study area can be divided into one middle-term base level cycle and five short-term base level cycles. The only sequence structure of middle term cycle is (B type) and the short term cycle mainly consists of B types meanwhile there are small mounts of upward deepening structures (A type) and symmetric structures (C type). Based on the classification of base-level cycles, fine stratigraphic correlation is conducted by using isochronous cycle correlations. In addition, 15 high resolution sequence stratigraphic frameworks are established which unify the study area and provide the solid geological basis for the sandstone distribution, the identification of mainly oil-bearing sand bodies and potential oil reservoirs.

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A 23.7-year long daily growth rate record of a modern giant clam shell from South China Sea and its potential in high-resolution paleoclimate reconstruction

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2021.110682 ◽

2021 ◽

Vol 583 ◽

pp. 110682

Author(s):

Nanyu Zhao ◽

Hong Yan ◽

Yuanjian Yang ◽

Chengcheng Liu ◽

Xiaolin Ma ◽

...

Keyword(s):

Growth Rate ◽

High Resolution ◽

South China Sea ◽

South China ◽

Giant Clam ◽

Daily Growth Rate ◽

Daily Growth ◽

Paleoclimate Reconstruction ◽

Clam Shell ◽

China Sea

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Phylogenetic model of <i>Follicucullus</i> lineages (Albaillellaria, Radiolaria) based on high-resolution biostratigraphy of the Permian Bancheng Formation, Guangxi, South China

Journal of Micropalaeontology ◽

10.1144/jmpaleo2014-012 ◽

2014 ◽

Vol 33 (2) ◽

pp. 179-192 ◽

Cited By ~ 16

Author(s):

Lei Zhang ◽

Tsuyoshi Ito ◽

Qinglai Feng ◽

Martial Caridroit ◽

Taniel Danelian

Keyword(s):

High Resolution ◽

South China ◽

Guangxi Province ◽

Phylogenetic Model ◽

Stratigraphic Ranges ◽

Abundant Genus ◽

Radiolarian Assemblages

Abstract. High-resolution sampling was performed on four Permian sections in Guangxi Province, South China (Gujingling, Sanpaoling, Guoyuan and Yutouling sections). We report abundant and well-preserved Guadalupian–Lopingian radiolarian assemblages, with 25 species belonging to three genera of the order Albaillellaria. Among them, the most abundant genus is Follicucullus with 17 species: F. bipartitus, F. charveti, F. sp. cf. F. charveti, F. dilatatus, F. falx, F. sp. cf. F. falx, F. guangxiensis, F. hamatus, F. monacanthus, F. sp. cf. F. monacanthus, F. orthogonus, F. sp. cf. F. orthogonus, F. porrectus, F. scholasticus, F. sp. cf. F. scholasticus, F. ventricosus and F. sp. cf. F. ventricosus. On the basis of composite stratigraphic ranges, this study suggests four Interval Zones in ascending order, namely F. monacanthus, F. porrectus, F. scholasticus and F. charveti Interval Zones. We provide a phylogenetic model for Follicucullus based on their morphological affinities and stratigraphic distribution. The genus Follicucullus originated from Pseudoalbaillella fusiformis, with F. monacanthus as the forerunner species from which two contemporary species then radiated: F. dilatatus and F. porrectus. Follicucullus porrectus is a long-lasting species, it is abundant in our material and several Follicucullus lineages originated from it. In terms of evolution it is considered to be the ancestor of a number of Follicucullus species.

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