Mica/smectite mixed-layer minerals in alteration zones surrounding the Yokota Kuroko deposit, Aizu district, Northeast Japan.

Further Investigations of a Conversion Series of Dioctahedral Mica/smectites in the Shinzan Hydrothermal Alteration Area, Northeast Japan

-A complete conversion series for mica/smectites was found in a hydrothermal alteration envelope around Kuroko-type ore deposits at the Shinzan area, Akita Prefecture, Northeast Japan. The minerals are an alteration product of volcanic glass of Miocene age and are commonly associated with zeolites and silica minerals. Degrees of ordering of interstratification of the minerals change discontinuo...

Application of fractal modeling to delineate alteration zones and lithological units in Masjed-Daghi Cu-Au porphyry deposit, NW Iran

In this paper, we aim to present a quantitative modeling for delineating the alteration zones and lithological units in the hypogene zone of Masjed-Daghi Cu-Au porphyry deposit (NW Iran) based on the drill core data. The main goal of this work is to apply Ordinary Kriging (OK) and concentration-volume (C-V) fractal model based on Cu grades in order to separate the different alteration zones and...

Illite-smectite mixed-layer minerals in hydrothermal alteration of volcanic rocks: II. One- dimensional HRTEM structure images and formation mechanisms

Running Title: 1-D HRTEM structure images of hydrothermal I-S mixed-layer minerals The person to whom correspondence and page proofs should be sent: Takashi Murakami Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, JAPAN E-mail: [email protected] ha l-0 01 07 03 2, v er si on 1 5 D ec 2 00 7 Author manuscript, published in "Clays and Clay Minerals 5...

CONCENTRATION VARIATIONS OF MAJOR AND MINOR ELEMENTS ACROSS VARIOUS ALTERATION ZONES IN PORPHYRY COPPER DEPOSIT AT SUNGUN, EAST AZARBAIDJAN, IRAN

Investigation of mineralization, alteration, and fluid inclusions of the Takht-e-Gonbad copper deposit (northeast of Sirjan, SE Iran)

The Takht-e-Gonbad copper mineralization is located about 63 km of northeast of Sirjan city. Hypogene mineralization occurred as stockwork vein-veinlets and thick quartz veins hosted by Oligo-Miocene micro-granodiorite body and Eocene pyroclastic materials (mainly tuff with intermediate composition). The stockwork vein-veinlets contain three generations of mineralization, (1) quartz + magnetite...