Oleh: Benyamin Sapiie;Danny H. Natawidjaya;Mark Cloos

Abstraksi : Most of the Cenozoic tectonic evolution of New Guinea is the result of oblique convergence that led to a collision between the Australian continent and an oceanic are built into the leading edge of the Pacific Plate. Field studies in the Gunung Bijih (Erberg) Mining District (GBMD) located the ...

Oleh: Elan Biantoro;Achmad Luthfi

Abstraksi : The objective of conventional hydrocarbon exploration in Bird Head area Irian Jaya was focused on the carbonate Tertiary. It had been proven commercially in the Salawaty Basin, and marginally commercial in the Bintuni Basin such as Mogoi, Wasian, and Wiriagar fields. Gas discoveries in the Wiriagar ...

Oleh: H. Permana;Suharyanto, A. Soebandrio;R. Soeria Atmadja

Abstraksi : Three major Cenozoic tectonic events took place in the northern part of Irian Jaya after the formation of Eocene Oligocene volcanic arc islands. Island arc formed as a result of southward subduction of Australian oceanic crust beneath the Australian continental crust. 1) Tectonic emplacement of ...

Oleh: S. Burhanuddin;J.A. Malod;Ulva R;F. Hincherberger;Sultan

Abstraksi : A recent cruise of IMAGES IV on the French Research Vessel Marion Dufresne II carried out in the Indonesian waters, in the frame of an International Cruise joint project allowed a bathymetric images and dredging survey of the southern part of the Ambon island. A detailed bathymetric map has been ...

Oleh: Munasri;Haryadi Permana;Safei Siregar

Abstraksi : The island of Seram as well as Timor is located on the outer Banda Arc. Those two islands are now situated oppositely on the Banda Sea. Seram island lies in the northern side whilst Timor island in the southern side. The geology of Seram in many respects is told as a mirror image of Timor. This ...

Oleh: Edy Sunardi;R.P. Koesoemadinata

Abstraksi : New K-Ar whole-rock age determination on 18 sites has made clear that volcanic activity has occurred intermittently in the 4 Ma, -3.3-2.9 Ma, ~1.7 Ma, ~1.1 Ma, 05 Ma, -0.2 Ma and 0.1-0.04 Ma. This phenomenon indicates that volcanic activity occurred continuously uninterrupted, without showing a ...

Oleh: Afiat Anugrahadi;Yusuf Surachman D;Sidik Mulyono;Eko Triarso;Djunaedi Muljawan;Syarif Hidayat

Abstraksi : Joint cooperation on marine geoscientific research between Indonesian (BPPT) German (BGR Bundesanstalt Fur Geowissenschaften und Rohstoffe), used Research Vessel SONNE has been carried out from 29 November 1998 to 27 February 1999, from south of Cilacap, West Java, Sunda Strait to south of Bengkulu ...

Oleh: Dr. T.O. Simandjuntak

Abstraksi : Neogene typifies an orogenic event in the whole Indonesia region and is one of the youngest orogeny around the globe. Cinematically, it is quite distinctive with the Neogene Orogeny in other parts of Indonesia, such as the Barisan Orogeny in Sumatera, Sunda Orogeny in Jawa-Nusatenggara, Sulawesi ...

Oleh: A. Soehaimi;H.Moechtar

Abstraksi : The studied area is located in Bangka Island which is part of the Southeast Asian Tin Belt. The objectives of this paper are to describe sedimentary succession in the studied area and to model a coastal plain basin fill. The project acomplished by analyzing the variability deposit type in coastal ...

Oleh: Johanes Hutabarat

Abstraksi : The study concerned about the evolution of high potassic volcanic rocks of Gunung Ringgit, Bondowoso, East Java. Based on the petrographic analysis, the rock assemblages of Gunung Ringgit volcanic rocks could be grouped into Potassic and Ultra-potassic rocks. The potassic group including basanite, ...

Oleh: Andri S.S. Mubandi;Yusuf S. Djajadihardja;Basri M. Ganie

Abstraksi : The Celebes Sea lies in the convergence center of three major crustal plates: Indo-Australian Plate, Pacific Plate (with the Philippine Plate) and Eurasian Plate. The Indo-Australian Plate moves northward relative to the Eurasian Plate, while the Philippine Plate generally move to the west. ...

Oleh: Amiruddin

Abstraksi : Two Permian Triassic granites grouped into the Netoni Suite and The Anggi Suite are exposed in the Tamrau and Kemum blocks respectively, Bird Head Region, Irian Jaya. The Netoni suite is an I-type granite whereas the Anggi Granite is a S-type granite. The Netoni suite is metaluminous and ...