Quy trình gia công và phân tích hóa thạch Tảo vôi, áp dụng cho các trầm tích ven biển tỉnh Sóc Trăng

Nguyen Thi Hong Nhung; Nguyen Thi Thuy; Nguyen Viet Hien; Nguyen Huu Manh

doi:10.15625/1859-3097/19/4/12676

Author affiliations

Authors

Nguyen Thi Hong Nhung Institute of Geosciences and Mineral Resources, Hanoi, Vietnam
Nguyen Thi Thuy Institute of Geosciences and Mineral Resources, Hanoi, Vietnam
Nguyen Viet Hien Institute of Geosciences and Mineral Resources, Hanoi, Vietnam
Nguyen Huu Manh Institute of Geosciences and Mineral Resources, Hanoi, Vietnam

DOI:

https://doi.org/10.15625/1859-3097/19/4/12676

Keywords:

Calcareous nannofossils, process of preparation and analysis, Soc Trang coastal area.

Abstract

Calcareous nannofossils are very small microfossils composed of calcium carbonate. They are very good biostratigraphic markers within marine sediments by covering the Jurassic to present. The standard preparation of a sample for nannofossil analysis requires the collection of the largest quantity and the best fossils. Sample preparation accords to the following steps: i. Pounding sample; ii. Eliminating organic matter; iii. Washing sample; iv. Filter sample through the sieve; v. Eliminating clay; vi. Drying sample in an incubator; vii. Packing sample. Sample analysis accords to the following steps: i. Preparation of smear - slide; ii. Observation of morphology; iii. Determination; iv. Taking photo; v. Evaluating overall preservation and abundance of fossils; vi. Making analysis result sheet. This process is applied to study calcareous nannofossils within marine sediments in Soc Trang province. It makes much clear to understand middle Pleistocene-early Holocene ecosystem of calcareous nannofossil. In conclusion, this assemblage belongs to NN21 zone by the present of Emiliania huxleyi and Gephyrocapsa oceanica.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

De Vernal, A., Henry, M., and Bilodeau, G., 2010. Micropaleontological preparation techniques and analyses. Les Cahiers du GEOTOP, 3, 31.

Melinte, M. C., 2005. Oligocene palaeoenvironmental changes in the Romanian Carpathians, revealed by calcareous nannofossils. Studia Geologica Polonica, 124, 341–352.

Vu Truong Son et al., 2011. Surveying and evaluating the potential of mineral resources in coastal areas of Soc Trang province, a scale of 1:100,000. Northern Center for Planning and Investigation of Marine resources - environment, Hanoi.

Perch-Nielsen, K., 1985. Cenozoic calcareous nannofossils. Plankton stratigraphy, 427–554.

Young, J. R., and Bown, P. R., 1997. Higher classification of calcareous nannofossils. Journal of Nannoplankton Research, 19(1), 15–20.

Young, J. R., Geisen, M., Cros, L., Kleijne, A., Sprengel, C., Probert, I., and Østergaard, J., 2003. A guide to extant coccolithophore taxonomy. Journal of nannoplankton research, 1(1), 1–125.

http://mikrotax.org

Martini, E., 1971. Standard Tertiary and Quaternary calcareous nannoplankton zonation. In Proc. II Planktonic Conference, Roma 1970, Roma, Tecnoscienza (Vol. 2, pp. 739–785).

Okada, H., 1980. Supplementary modification and introduction of code numbers to the low-latitude coccolith biostratigraphy (Bukry, 1973; 1975). Mar. Micropaleontol., 5, 321–325.