Structural controls on the occurrence and morphology of karstified assemblages in northeastern Vietnam: a regional perspective

Tran, Hai T.; Dang, Bat Van; Ngo, Chi Kim Thi; Hoang, Q.D.; Nguyen, Quyen Minh

doi:10.1007/s12665-011-1057-1

Cited by 14 publications

(1 citation statement)

References 10 publications

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“…In addition, CaCO 3 in the ocean plays a key role in climatic (environmental) regulation through its precipitation and dissolution associated with marine chemical environments (Smith & Mackenzie, 2016; Subhas et al., 2022). Therefore, the study of CaCO 3 content in marine sediments is of great significance to climate studies (Higgins et al., 2009; Kleinen et al., 2010; Lindberg & Mienert, 2005; Luo et al., 2016; Tran et al., 2013).…”

Section: Introductionmentioning

confidence: 99%

Semi‐Quantification of the Calcium Carbonate in Marine Sediments by Visible and Near‐Infrared Diffuse Reflectance Spectroscopy

Cao,

Liu,

Jiang

et al. 2024

Geochem Geophys Geosyst

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As one of the most widespread components in marine sediments, calcium carbonate (CaCO3) plays a crucial role in the global carbon cycle and climate changes. To efficiently semi‐quantify the CaCO3 concentration, a more effective, non‐destructive, economic, and accurate technique is required. Diffuse reflectance spectroscopy (DRS) has been widely used for the detection and quantification of minerals but has been less studied for CaCO3. This study synthesized a series of samples with well‐determined content of CaCO3 to analyze the visible and near‐infrared DRS characteristics. Results show that the intensity of the second derivative of Kubelka‐Munk (K‐M) remission functions of the DRS spectra at 2,340 nm (I2340) is linearly correlated with the CaCO3 content. Then, the new proxy I2340 was applied for marine sediments from the Pacific Ocean with known CaCO3 concentrations determined previously by chemical methods, and the robustness of the I2340 as the proxy for CaCO3 concentration was attested.

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Section: Introductionmentioning

confidence: 99%

Semi‐Quantification of the Calcium Carbonate in Marine Sediments by Visible and Near‐Infrared Diffuse Reflectance Spectroscopy

Cao,

Liu,

Jiang

et al. 2024

Geochem Geophys Geosyst

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Ha Long Bay, Vietnam

Claudino-Sales

2018

Coastal World Heritage Sites

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Development and structure of karstification of the Dong Van Karst Plateau UNESCO Global Geopark, North Vietnam based on cave survey data

Tran

Goeppert

Palmer

et al. 2022

Int J Earth Sci (Geol Rundsch)

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This paper presents a quantitative study of the relationship between the cave system and the tectonic and karst evolution of the Dong Van Karst Plateau based on analysis and statistics of geometric parameters and orientation of cave passages. The region is located in northern Vietnam and belongs to the extended part of the South China karst belt (Yunnan karst plateau), which is composed mainly of carbonate rocks. Cave classification based on cave conduits geometric parameters shows that caves developed mainly in the vadose zone (27 vadose branchwork caves, 10 mixed caves developed under the control of fault systems, and 12 water-table caves). The degree of correlation between cave levels and planation surfaces suggests that the development of horizontal cave passages is related to two levels of planation surfaces, including one at 1250–1450 masl (equivalent to cave level at 1350–1450 masl), and at 1000–1250 masl (corresponding to cave level at 1200–1250 masl). Additionally, cave passage orientation shows that the cave system formed and developed under the influence of tectonic activities in the Cenozoic. The dominant orientation trend is roughly in the East–West direction and occurred in the early phase (Eocene–Miocene). Next is a trend roughly North–South that occurred in the late phase (Pliocene–Quaternary). The last orientation trend follows the NW–SE direction due to the reactivation of paleo-fault systems in the same direction. Although there are limitations due to accessibility and the level of cave exploration, this research suggests that analysis and statistics of the geometric parameters and orientation of cave passages based on cave survey data can be one of the effective approaches used to identify the development and structure of karstification in the karst region.

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Structural controls on the occurrence and morphology of karstified assemblages in northeastern Vietnam: a regional perspective

Cited by 14 publications

References 10 publications

Semi‐Quantification of the Calcium Carbonate in Marine Sediments by Visible and Near‐Infrared Diffuse Reflectance Spectroscopy

Semi‐Quantification of the Calcium Carbonate in Marine Sediments by Visible and Near‐Infrared Diffuse Reflectance Spectroscopy

Ha Long Bay, Vietnam

Development and structure of karstification of the Dong Van Karst Plateau UNESCO Global Geopark, North Vietnam based on cave survey data

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