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Miocene shallow-marine cold seep carbonate in fold-and-thrust Western Foothills, SW Taiwan
Chien, CW; Huang, CY; Chen, Z; Lee, HC; Harris, R; huangcy@ncku.edu.tw
2012
发表期刊JOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
卷号56页码:200-211
摘要A mound-shaped authigenic carbonate buildup (50 m wide and 5 m high) occurred in the middle part of the Late Miocene shallow marine succession (the Hunghuatzu Formation) exposed along the Nantzuhsien River, SW Taiwan. The carbonate concretions are classified into four types based on morphology, which appeared to develop in upward sequence with vague boundaries: (1) flat-pipe shaped nodules: highly dolomitic small pipes or nodules subparallel to the host strata, (2) bulb-shaped nodules: discrete or combined small mesoclots with subspherical to irregular shapes, (3) mushroom-shaped concretions: large mushroom-like or irregular shaped blocks with chimney or vent structures, and (4) carbonated layers with sedimentary structures. These concretions are mainly composed of dolomite micrites, quartz, feldspar, muscovite, and clay minerals, ubiquitously interweaved with blackish brown colored low magnesium calcite (LMC) veins. Low (delta C-13(VPDB) values (-51.8 parts per thousand to -29.8 parts per thousand) of all types of the carbonates reveal that the carbonates were mainly derived from anaerobic oxidation of hydrocarbons. Many samples are also O-18-depleted (delta O-18(VPDB): -11.5 parts per thousand to 1.00 parts per thousand) due to the mixture with isotopically light LMC veins, likely precipitated from meteoric waters. There are numerous chemosymbiotic bivalve fossils (genus Monitilora? diameter 3-4 cm) in growth position just above the carbonate buildup. According to the geological and isotopic signatures, the Hunghuatzu carbonates are related to a cold seep pseudobioherm, which formed in a very shallow marine environment like tidal-flat in a passive margin setting. Exposures of the Hunghuatzu pseudobioherm may provide clues for tracking and comparing the evolution history of gas reservoir systems and hints of active tectonics of the SW Taiwan region. (C) 2012 Elsevier Ltd. All rights reserved.
部门归属[Chien, Chih-Wei; Huang, Chi-Yue; Lee, Horng-Chun] Natl Cheng Kung Univ, Dept Earth Sci, Tainan 70101, Taiwan; [Huang, Chi-Yue] Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China; [Chen, Zhong] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China; [Harris, Ron] Brigham Young Univ, Dept Geol Sci, Provo, UT 84602 USA
关键词Authigenic Carbonate Cold Seep Western Foothills Stable Isotopes Southwestern Taiwan
学科领域Geosciences, Multidisciplinary
语种英语
资助项目海洋地质
WOS记录号WOS:000307427000015
引用统计
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10319
专题中科院边缘海地质重点实验室
通讯作者huangcy@ncku.edu.tw
推荐引用方式
GB/T 7714
Chien, CW,Huang, CY,Chen, Z,et al. Miocene shallow-marine cold seep carbonate in fold-and-thrust Western Foothills, SW Taiwan[J]. JOURNAL OF ASIAN EARTH SCIENCES,2012,56:200-211.
APA Chien, CW,Huang, CY,Chen, Z,Lee, HC,Harris, R,&huangcy@ncku.edu.tw.(2012).Miocene shallow-marine cold seep carbonate in fold-and-thrust Western Foothills, SW Taiwan.JOURNAL OF ASIAN EARTH SCIENCES,56,200-211.
MLA Chien, CW,et al."Miocene shallow-marine cold seep carbonate in fold-and-thrust Western Foothills, SW Taiwan".JOURNAL OF ASIAN EARTH SCIENCES 56(2012):200-211.
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