Siti Umiyatun Choiriah, Choiriah and Carolus Prasetyadi, Carolus Prasetyadi and Rubiyanto, Kapid and Dwi Fitri, Yudiantoro (2018) Diversity model of Pliocene-Pleistocene nannofossil of Kendeng Zone. In: International Conference on Earth Science, Mineral and Energy (ICEMINE) 2018, 15-16 October 2018, YOGYAKARTA.
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Abstract
Abstract. Quantitative analyses of Pliocene-Pleistocene calcareous nannofossils from the
Kendeng Zone, East Java have been performed on 181 samples collected from 4 river sections
(Ngawi, Bojonegoro, Nganjuk and Jombang). The research method consists of field study and
quantitative statistical analysis. Field study is to measure sections of the 4 selected sections.
The samples taken include fine-grained rock (marl, shale) and carbonaceous. The sample
preparation has been carried out using smears slide method. Quantitative analysis uses
nannotex determination and diversity index. The river sections that have been selected consist
of a continuous sediment sequence from Pliocene Kalibeng to Pleistocene Sonde Formation.
The results of quantitative analysis indicate the following model of diversity nannofossil
Kendeng Zone: (1) Bengawan Solo River section, Ngawi, has an average 46 specieses;
Diversity Index (H′)=0.053, Homogeneity (E)=0.009, aged NN12-NN20 (Early PlioceneMiddle Pleistocene); (2) Kedungsumber River section, Soko Area, Distric of Temayang,
Bojonegoro, has an average 26 specieses and Diversity Index (H′)=0.035; and
Evennes/Homogeneity index (E)=0.006; and age NN12-NN20 (Early Pliocene-Early
Pleistocene); (3) Kaliasin River section, Pinggir area, Distric of Lengkong, Nganjuk, has an
average 40 specieses and Diversity Index (H′) = 0.050; and Evennes/Homogeneity
index (E)=0.009 and NN12-NN20 (Early Pliocene-Early Pleistocene); (4) Kalibeng River
section, Kedungringin Area,Distric ofPlandaan, Jombang hasan average 33 specieses, Diversity
Index (H′)=0.043 and Evennes/Homogeneity index (E)=0.007, aged NN12-NN19 (Early
Pliocene-Early Pleistocene).This nannofossil diversity model indicate that there is a
paleoclimate change in Pliocene-Pleistocene of Kendeng zone; and methods applied by the
present study has not been used by previous researchers.
Keywords: diversity, nannofossil, Pliocene-Pleistocene, Kendeng zone
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | Keywords: diversity, nannofossil, Pliocene-Pleistocene, Kendeng zone |
| Subjek: | Q Science > QE Geology |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Dr.Ir. MT SITI UMIYATUN CHOIRIAH |
| Date Deposited: | 31 Aug 2020 03:06 |
| Last Modified: | 31 Aug 2020 03:08 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/23558 |
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