New Insights Into The Geological Evolution of West Papua From Recent Field and Laboratory Studies
Lloyd T. White1, Max Webb1,2, Benjamin M. Jost2, David Gold3, Indra Gunawan4, Herwin Tiranda4
1.GeoQuEST Research Centre, School of Earth, Atmospheric and Life Sciences, Northfields Avenue, University of Wollongong, Australia, 2522.
2. Southeast Asia Research Group, Royal Holloway University of London, Egham, Surrey, UK, TW20 0EX.
3. CGG Robertson, Tynycoed, Llanrhos, Llandudno, UK,
4. Institut Teknologi, Bandung, Jalan Ganesha 10 Bandung, Indonesia.
Abstract
Our understanding of the geological evolution of West Papua (or the Bird-s Head Peninsula and Bird-s Neck) predominantly stems from a systematic mapping campaign conducted by Indonesian and Australian geologists during the 1970-s and 80-s, together with the findings of mineral and hydrocarbon exploration by Dutch geologists in the early 1900-s. Most of the research that has been conducted since these initial, but comprehensive studies have been associated with continued exploration for hydrocarbons (e.g., around the Salawati and Bintuni Basins) and precious metals (e.g., associated with Grasberg–Ertsburg). Here we present an overview of research conducted over the past five years that was largely funded by several oil exploration companies. Our research did not focus on oil exploration, but instead attempted to update our understanding of the age of magmatic, metamorphic and deformation events, and to improve our knowledge of the regional stratigraphy of West Papua. These new data have been used to develop new tectonic models and paleogeographic maps that provide a framework for future studies in the region to build upon.
Keywords: Irian Jaya; Birds Head; Geology; Tectonics; Geochronology; Indonesia; New Guinea
Topic: Geology