Paleogene-Neogene micropaleontological records of the Weixinan Depression, Beibuwan Basin and their paleoenvironmental significance

LI Jun; WANG Ren; QIN Jungan; QIU Kunqi

doi:10.16562/j.cnki.0256-1492.2019010901

2020 Vol. 40, No. 2

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Article navigation > Marine Geology & Quaternary Geology > 2020 > 40(2): 29-36

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LI Jun, WANG Ren, QIN Jungan, QIU Kunqi. Paleogene-Neogene micropaleontological records of the Weixinan Depression, Beibuwan Basin and their paleoenvironmental significance[J]. Marine Geology & Quaternary Geology, 2020, 40(2): 29-36. doi: 10.16562/j.cnki.0256-1492.2019010901

Citation:

LI Jun, WANG Ren, QIN Jungan, QIU Kunqi. Paleogene-Neogene micropaleontological records of the Weixinan Depression, Beibuwan Basin and their paleoenvironmental significance[J]. Marine Geology & Quaternary Geology, 2020, 40(2): 29-36. doi: 10.16562/j.cnki.0256-1492.2019010901

Paleogene-Neogene micropaleontological records of the Weixinan Depression, Beibuwan Basin and their paleoenvironmental significance

China National Offshore Oil Corporation, EnerTech-Drilling & Production Co., Zhanjiang 524057, China

Received Date: 09 January 2019

Revised Date: 28 February 2019

Publish Date: 25 April 2020

Abstract

Abstract

Changes in palaeoenvironment and palaeovegetation, and implications for climatic fluctuations were discussed in this paper, based on micropaleontological fossils including spores, pollen, freshwater algae and dinoflagellates cysts from the Well WZ5-X-Y which is located in the Weixinan Depression of Beibuwan Basin. Results suggest that the study area was a palaeolake during the study period. The lake shrank in Neogene but invaded by sea water in Miocene. The Paleogene vegetation was dominated by evergreen deciduous broadleaved forest, indicating a warm and humid climate condition, while the expansion of coniferous forest and contraction of evergreen broadleaved forest during Neogene suggest the decline of the temperature and humidity. The relatively wide distribution of evergreen broadleaved forest during Miocene indicate the improvement of the climate conditions.
- spores and pollen /
- freshwater alga dinoflagellates cysts /
- palaeoenvironment /
- palaeovegetation /
- palaeoclimate /
- Weixinan Depression

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References

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