reefal microfacies of east kalimantan revealed by larger...
TRANSCRIPT
![Page 1: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/1.jpg)
Vibor Novak
Supervisor: Willem Renema
Microfacies analysis of East Kalimantan reef systems based on larger benthic foraminifera
Progress report,
Kiel, June 2012
![Page 2: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/2.jpg)
Goals
• Building a stra9graphic framework based on biostra9graphy of larger benthic foraminifera
• Determine the affect of environmental change on LBF assemblages
• LBF evolu9on through 9me by comparing assemblages of different ages
• Review, update and correla9on of Indo-‐Pacific LBF biozones with the global stra9graphical schemes
![Page 3: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/3.jpg)
Progress (since Granada)
• Training:– Isolated LBF thin sec9on (Istanbul, April 2012)– SIS (RHUL, May 2012)– Interna9onal School on Foraminifera (Urbino, June 2012)
• Conferences:– Lyell (March 2012)– EGU (April 2012)
• Papers:– 3D Reef – almost finished– Samarinda biostra9graphy – in progress– Top Reef – in progress
![Page 4: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/4.jpg)
3D Reef
• Langhian age (late Tf1, early Tf2)
• Nine lithological units (U1-‐9); five facies types (FT1-‐5)
• General fossil groups results:– Two LBF assemblages– ScleracTnian and octocorals– Melobesioid CCA assemblages– Majority of bryozoan species encrusTng
beginning
![Page 5: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/5.jpg)
Facies types• Five different facies types -‐ based on lithology and fossil content
– BioclasTc packstone with rare fossils (BP1; Units 1 and 2)
– BioclasTc packstone with foralgal communiTes (BP2; Unit 3 and 6)
– Thin-‐platy coral sheetstone (CS; Units 4 and 7)
– Platy-‐tabular coral platestone (CP; Unit 5)
– Shales (S; Units 8 and 9)
![Page 6: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/6.jpg)
![Page 7: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/7.jpg)
Lepidosemicyclina polymorphaNephrolepidina ferreroi
Flosculinella bontangensis
Nephrolepidina martini
![Page 8: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/8.jpg)
Mesophyllum sp. Foralgalith
Lithoporella sp.
500 µm500 µm
500 µm
Calcareous coralline algae
![Page 9: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/9.jpg)
Representative scleractinian corals of the “fried egg” reef
2 cm
2 cm
1 cm
1 cm
1 cm
1 cm1 cm 1 cm
1 cm 1 cm 1 cm
![Page 10: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/10.jpg)
Representative bryozoans of the “fried egg” patch reef.
500 µm
100 µm 100 µm
200 µm 200 µm 200 µm
200 µm 200 µm 200 µm
200 µm 200 µm
![Page 11: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/11.jpg)
DEPOSITIONAL MODEL
A. Larger benthic foraminifera enter the environment
![Page 12: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/12.jpg)
DEPOSITIONAL MODEL
B. LBF and CCA stabilize the substrate
![Page 13: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/13.jpg)
DEPOSITIONAL MODEL
C. Thin-platy corals colonize the environment
![Page 14: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/14.jpg)
DEPOSITIONAL MODEL
D. Tabular corals growing on thin-platy coral substrate
![Page 15: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/15.jpg)
DEPOSITIONAL MODEL
E. Increase in terrestrial influx, only LBF and CCA occur
![Page 16: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/16.jpg)
DEPOSITIONAL MODEL
F. Surface stabilized, platy corals appear again
![Page 17: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/17.jpg)
DEPOSITIONAL MODEL
G. High siliciclastic input, demise of the reef
![Page 18: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/18.jpg)
Conclusion
• Main factor controlling reef growth – water transparency
• MesophoTc reefal environment
• Facies changes – variaTons in terrigenous input
• MulT-‐taxon fossil assemblage analysis – reference model
• Substrate stabilizaTon needed for reef development
![Page 19: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/19.jpg)
Samarindabiostra9graphy
![Page 20: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/20.jpg)
SIS results
![Page 21: Reefal microfacies of East Kalimantan revealed by larger ...ipaeg.org/sites/ipaeg.org/files/novak_nta5.pdf · Vibor&Novak Supervisor:WillemRenema Microfacies*analysis*of*EastKalimantan*reef*](https://reader030.vdocument.in/reader030/viewer/2022020411/5a7094fe7f8b9ab1538c1ac0/html5/thumbnails/21.jpg)
Future plans
• Conferences:
– ?GSA 2012, SAGE 2013
• Papers:
– Batu Pu9h
– New 3D Reef
– Bulu limestones (Java)
– Samarinda Sr-‐isotopes
– Comparison of LBF assemblages of 3D Reef, Top Reef, New 3D Reef, Batu Pu9h and Bulu limestones