Path: TopS1-Final ProjectGeology Engineering2013

GEOLOGI DAERAH DAWAI DAN SEKITARNYA, KABUPATEN YAPEN TIMUR, PULAU YAPEN, PROVINSI PAPUA

REGIONAL GEOLOGY OF DAWAI REGION AND SURROUNDINGS, EAST YAPEN DISTRICT, YAPEN ISLAND, PAPUA

Undergraduate Theses from JBPTITBPP / 2015-02-09 09:15:42
Oleh : REZA RAHADIAN (NIM: 12008006); pembimbing: Bambang Priadi ; Chalid Idham Abdullah, S1 - Department of Geology
Dibuat : 2013, dengan 7 file

Keyword : Yapen, Sesar Sorong, Satuan Batuan Beku Mafik, Sejarah Geologi.

Lokasi Penelitian berada pada daerah Dawai, Kabupaten Yapen Timur, Kepulauan Yapen, Papua dan terletak pada Zona -53, Datum WGS 84, N9798000-9807000 E690000-700000. Luas daerah wilayah penelitian sebesar 90 km2 (10 km x 9 km).







Daerah penelitian terdiri atas 5 (lima) satuan batuan, yaitu berturut-turut dari tua ke muda adalah Satuan Batuan Beku Mafik (Bagian dari Formasi Jobi), Satuan Breksi (Formasi Yapen), Satuan Batugamping (Formasi Wurui), Satuan Batupasir (Formasi Kurudu), serta terdapat endapan pantai dan aluvial yang terendapkan secara tidak selaras diatas keempat satuan batuan tersebut. Pembentukan Satuan Batuan Beku Mafik pada umur Pra-Tersier di lingkungan kerak samudera merupakan proses paling tua yang terjadi di daerah penelitian. Setelah itu, pada umur Eosen- Miosen Awal terjadi aktivitas vulkanisme di lingkungan island arc sehingga diendapkan Satuan Breksi. Pada kala Miosen Awal-Miosen Tengah, terjadi regresi air laut dan di belakang busur pegunungan (di selatan Satuan Breksi), diendapkan Satuan Batugamping pada lingkungan laut dangkal, sedangkan di sebelah utara Satuan Breksi, diduga diendapkan serpih (Formasi Makats) pada lingkungan pengendapan laut dalam yang tidak tersingkap di daerah penelitian. Pada umur Miosen Akhir, terjadi pengangkatan, sehingga di bagian utara daerah penelitian diendapkan Satuan Batupasir di lingkungan laut dangkal.







Di daerah penelitian, terdapat 2 (dua) kali deformasi yang berkembang di daerah penelitian, yakni deformasi dengan arah tegasan utama utara-selatan yang berkembang pada Miosen Tengah-Miosen Akhir serta deformasi dengan arah tegasan utama timurlaut-baratdaya (Sesar Jobi/Sesar Sorong) yang berkembang pada Pliosen Awal-Sekarang.

Deskripsi Alternatif :

Research area is located on Dawai Area, East Yapen District, Yapen Island, Papua and geographically is on -53 zone, WGS 84 Datum, N9798000-9807000 E690000-700000. Total research area is 90 km2 (10 km x 9 km).







In this research area, there are 5 lithologic units identified, which arrange young to old are Mafic Igneous Rock Unit (part of Jobi Formation), Breccia Unit (Yapen Formation), Limestone Unit (Wurui Formation), Sandstone Unit (Kurudu Formation), and Alluvial and Beach Deposit, which deposited unconformably above those older units.







The oldest unit, Mafic Igneous Rock, was a part of oceanic crust and formed on Pre-Tertiary. On Eocene-Early Miocene, there was a high volcanism activity on Island Arc environment so that Breccia Unit was deposited unconformably above Mafic Igneous Rock Unit. On Early Miocene-Middle Miocene, a regression was occur and behind the Island Arc (the southern of Breccia Unit) was deposited a Limestone Unit on shallow marine environment, but on the northern of the Breccia Unit was deposited a shale deposit on deep marine environment which is not appear on the research area. On Late Miocene, there was an uplift so that Sandstone Unit was deposited on the shallow marine environment on the northern of the Breccia Unit.







In research area, there were two deformations happened, the first deformation was North-South stress direction on Middle Miocene-Late Miocene and the second was NE-SW stress direction (Jobi Fault /Sorong Fault) which developed on Early Pliocene to Recent time

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PropertiNilai Properti
ID PublisherJBPTITBPP
OrganisasiS
Nama KontakUPT Perpustakaan ITB
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KotaBandung
DaerahJawa Barat
NegaraIndonesia
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Fax62-22-2500089
E-mail Administratordigilib@lib.itb.ac.id
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  • pembimbing: Bambang Priadi ; Chalid Idham Abdullah, Editor: Alice Diniarti

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