Explanation of marine lake formation at Misool Raja Ampat West Papua, Indonesia

Purba, Gandi Y. S. and Rumenta, Lukas and Purwanto, Purwanto and Becking, Leontine E. and Haryono, Eko (2021) Explanation of marine lake formation at Misool Raja Ampat West Papua, Indonesia. Bulletin of the Geological Society of Malaysia, 72. 151 – 163. ISSN 01266187

Full text not available from this repository. (Request a copy)

Abstract

Marine lake in a karst landscape is one of the macro karst forms known as doline and is only found in some locations in the world. Moreover, the theory of marine doline formation is always associated with global sea-level rise which differs from one place to another due to several factors. This research was conducted to understand the formation process of marine lakes in Misool and how the water fills the basins formed especially at Holocene time. This was achieved by obtaining information on the longest underwater terrace which is also the longest standing water position recorded on the sea wall. The marine terraces were measured by sounding profiles to the sea bordering the seven marine lakes including Lenmakana, Balbullol, Lenkafal, Keramat, Karawapop, Keramat-2, and Keramat-3 as well as Harapan Jaya Sea. A total of 24 profiles were measured and stable isotopes δ18O and δD of water samples were used to determine the origin of water in the lakes. The results showed the longest terrace was at the depth of ˗33 and ˗3 m while the references from the area closest to Misool showed the same water level positions at 10,500 BP and 6,985 BP. Furthermore, the composition of δ18O and δD from lake water indicated the water samples were a mixture of groundwater and seawater with the seawater having the more dominant concentration and this allows it to fill the lake first through a previously formed cavity system. © 2021 by the Author(s).

Item Type: Article
Additional Information: Cited by: 0; All Open Access, Gold Open Access
Uncontrolled Keywords: Karst; Marine lake; Raja Ampat; Sea-level rise; Stable isotope
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions: Faculty of Geography > Departemen Geografi Lingkungan
Depositing User: Sri JUNANDI
Date Deposited: 11 Sep 2024 04:08
Last Modified: 11 Sep 2024 04:08
URI: https://ir.lib.ugm.ac.id/id/eprint/5187

Actions (login required)

View Item
View Item