Endapan pasir kwarsa di Indonesia menurut data yang tersedia terdapat tersebar di Sumatera, Bangka, Belitung, Jawa Madura, Kalimantan dan Irian Jaya. Secara alam endapan tersebut umumnya berfluktuasi dalam susunan kimia dan sifat fisiknya. kadar SiO2 mulai dari 80 % sampai 99 %, Na2O dari 0.02 sampai 0,40%, K2O dari 0,03 sampai 0,70 %, dan Fe2O3 dar…
The Lassi mass, Southeast of lake singkarak is a complex rock assemblage of permo-Carboniferous volcanics and sediments and Triassic Duringg Permo-Carboniferous volacanic and sediments and Triassic deposits, intruted by plutons and partly overlain by Tertiary sediments. During Permo-Carboniferous time this area was occupied by an elongated sea basin…
The book summarizes the occurrence, geochemistry, mineralogy, petrology and phaseequilibria studies in air and under high pressures related to the most intriguing group of potassium-rich mafic and ultramafic rocks, often including host of exoyic mineral assemblages including feldspathoids.
Coalbedmethane is increasingly playing a major role as a gas resource in the United States, Presently, about eight percent of the total annual natural gas produced in the United States is coalbed methane (fig. I). Coalbed methane was originally thought to be economicallyproduced only from high-rank coal. However,with the advent of economic coalbed …
Sampai di penghujung tahun 2009, telah panasbumi diketahui sedikitnya 265 lokasi sumber energi otensi lersebut seluruh dengan potensi 28.1 GWe Sebagian berasosiasi dengan jalur vulkanik, yang umumnya berentalp adalah sumber panasbumi dapat dikembangkan tir secara komersial untuk pembangkitan tenaga listrik. Sebagian k yang berasosiasi dengan sistem …
Senggigi is the prime tourist destination in Lombok Island, and one of the best places in Indonesia for urism. This resort is located at the west beach, and on 'the hilly part of Lombok Island. Based on its logy, this area has incompacted volcanic rocks from Tertiary and Quarterly ages. The increase of vironmental pressures causes instability to t…
Edisi
2nd vol
ISBN/ISSN
-
Deskripsi Fisik
xviii, 942 p. : ill. ; 21.5cm
Judul Seri
From The Earth Sciences to Prosperity, Sustainability and Integrity of Indonesia
The petroleum sector remains a critical element of the Indonesia economy. Oil and gas accounted for almost a third of the country's export receipts in 1992. While the crude oil share of GDP is not growing, gas development and petroleum processing are increasing. Oil and Gas continue to account for a large share of goverment revenues. Industry analys…
Land-water interaction in the Malili Lakes area can be explained by a external and internal scales. The first is expressed as surface water flows while the second is the underground ecotones, in the soil, cracks, joints, fractures, and caves along the boundary zone between high and low groundwater table. A clear and sharp boundary between the two…
The recognition of the nature of primary and secondary dispersion halos and trains associated with mineral deposits. Although haloesand trains were known for centuries to be associated with metal deposits, the work carried out in the U.S.S.R and Scandinavia in the 1930's and early 1940's systematised the data and permitted it to be used in the most …