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Formation Mechanism of Beach Rocks and Its Controlling Factors in Coral Reef Area, Qilian Islets and Cays, Xisha Islands, China
Zhao, Na1; Shen, Dishu2; Shen, Jian-Wei
2019
Source PublicationJOURNAL OF EARTH SCIENCE
ISSN1674-487X
Volume30Issue:4Pages:728
AbstractBeach rock, which forms at the intertidal zone, is a natural barrier to protect beach and island from wave erosion. The formation mechanism of beach rocks is significant in the study of surface carbonate diagenesis and protection of island. Beach rocks in Qilian Islets and Cays were formed about 500-700 a BP, neither its composition nor sedimentary structure experienced intense post-reformation. Beach rocks in Qilian Islets and Cays are mainly composed of reef-building skeletal fragments and bioclasts without terrigenous sediments. This study focused on the types and morphologies of cements in beach rocks of Qilian Islets and Cays, and its cementation mechanisms and influencing factors. Biological activities, such as micritization caused by microbial activities and algae binding action, play an important role in the initial stage of bioclast transformation and promote the subsequent early marine and early meteoric cementation. Acicular aragonite induced by early marine cementation is well developed in beach rocks, especially in those samples from Medium Islet. Early meteoric cementation is not common as marine cementation, generally presenting granular and meniscus cements. The main factors affecting the formation and development of beach rocks in Qilian Islets and Cays include sediment source, hydrodynamic condition, climate, sea level change and anthropogenic impacts.
DepartmentOMG
Keywordbeach rock cementation micritization coral reef Qilian Islets and Cays the South China Sea
DOI10.1007/s12583-018-0981-3
Citation statistics
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17939
Collection中科院边缘海地质重点实验室
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chongqing City Management Coll, Huxi Higher Educ Mega Ctr, Chongqing 401331, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Na,Shen, Dishu,Shen, Jian-Wei. Formation Mechanism of Beach Rocks and Its Controlling Factors in Coral Reef Area, Qilian Islets and Cays, Xisha Islands, China[J]. JOURNAL OF EARTH SCIENCE,2019,30(4):728, 738.
APA Zhao, Na,Shen, Dishu,&Shen, Jian-Wei.(2019).Formation Mechanism of Beach Rocks and Its Controlling Factors in Coral Reef Area, Qilian Islets and Cays, Xisha Islands, China.JOURNAL OF EARTH SCIENCE,30(4),728.
MLA Zhao, Na,et al."Formation Mechanism of Beach Rocks and Its Controlling Factors in Coral Reef Area, Qilian Islets and Cays, Xisha Islands, China".JOURNAL OF EARTH SCIENCE 30.4(2019):728.
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