Diffuse Reflectance Spectroscopy Study of Mottled Clay in the Coastal Area of Fujian and Guangdong Provinces and the Interpretation of Its Origin and Sedimentary Environment

Jing WANG; Zhen CHEN; Quan-zhou GAO

doi:10.3964/j.issn.1000-0593(2022)08-2494-05

Journals >Spectroscopy and Spectral Analysis >Volume 42 >Issue 8 >Page 2494 > Article

Spectroscopy and Spectral Analysis
Vol. 42, Issue 8, 2494 (2022)

Diffuse Reflectance Spectroscopy Study of Mottled Clay in the Coastal Area of Fujian and Guangdong Provinces and the Interpretation of Its Origin and Sedimentary Environment

Jing WANG^{1,1; 2; *;}, Zhen CHEN^3,3;, and Quan-zhou GAO^1,1;

Author Affiliations

¹1. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China

³3. GDZD Institute on Deep Earth Sciences, Guangzhou 510275, China

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DOI: 10.3964/j.issn.1000-0593(2022)08-2494-05 Cite this Article

Jing WANG, Zhen CHEN, Quan-zhou GAO. Diffuse Reflectance Spectroscopy Study of Mottled Clay in the Coastal Area of Fujian and Guangdong Provinces and the Interpretation of Its Origin and Sedimentary Environment[J]. Spectroscopy and Spectral Analysis, 2022, 42(8): 2494 Copy Citation Text

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Fig. 1. Studied drill cores in the Pearl River delta
(a): DH5; (b): DH7; (c): TS; (d): JT

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DRS first derivative curves of mottled clay in comparison with those of underlying sedimentsBlue dotted lines indicate goethite and red dotted lines indicate hematite

Fig. 2. DRS first derivative curves of mottled clay in comparison with those of underlying sediments
Blue dotted lines indicate goethite and red dotted lines indicate hematite

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钻孔名称	特征
	GPS	花斑粘土埋深/m	花斑粘土层厚度/m	花斑粘土岩性	花斑粘土下伏沉积岩性	样品数量
	GPS	花斑粘土埋深/m	花斑粘土层厚度/m	花斑粘土岩性	花斑粘土下伏沉积岩性	花斑粘土	下伏沉积
DH5	22°59'30.67″N, 113°11'31.08″	3.0	1.3	灰、黄褐色粘土质粉砂	灰黑色粘土	4	4
DH7	22°40'33.49″N, 113°23'44.09″	7.0	2.5	灰、黄褐、红褐色粘土质粉砂	灰黑色粘土	4	4
TS	23°0'14.16″N, 113°27'25.53″E	5.0	1.5	灰、黄褐色斑纹状粘土质粉砂	灰色粘土	4	4
JT	23° 0'0.72″N, 113°29'58.51″E	7.0	1.6	灰、黄褐色斑纹状粘土质粉砂	灰黑色粘土	4	4

Table 1. Characters of the studied mottled clay and their underlying layers

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钻孔	岩性	参数	赤铁矿 565 nm	针铁矿 435 nm
DH5	花斑粘土	范围	0.32~0.36	0.16~0.25
		平均值	0.33	0.21
		变异系数	0.06	0.17
	下伏沉积	范围	0.05~0.12	0.08~0.33
		平均值	0.08	0.20
		变异系数	0.40	0.62
DH7	花斑粘土	范围	0.21~0.25	0.18~0.21
		平均值	0.24	0.19
		变异系数	0.08	0.07
	下伏沉积	范围	0.05~0.18	0.19~0.33
		平均值	0.12	0.26
		变异系数	0.44	0.26
TS	花斑粘土	范围	0.33~0.45	0.13~0.20
		平均值	0.39	0.17
		变异系数	0.08	0.13
	下伏沉积	范围	0.05~0.20	0.09~0.32
		平均值	0.14	0.22
		变异系数	0.38	0.37
JT	花斑粘土	范围	0.34~0.42	0.17~0.21
		平均值	0.38	0.19
		变异系数	0.07	0.06
	下伏沉积	范围	0.02~0.05	0.04~0.10
		平均值	0.04	0.07
		变异系数	0.29	0.21

Table 2. Peak height values of iron minerals in the mottled clay and comparison with those of underlying layers

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