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Arthur J. Gude

Publications and source records attributed to Arthur J. Gude.

14 recordsLinked to original sources
USGS2024

Woolly erionite from the Reese River zeolite deposit, Lander County, Nevada, and its relationship to other erionites

Woolly erionite from the Reese River deposit, Nevada, is identical in appearance to that at the type locality, near Durkee, Oregon. Both of these erionites differ in appearance from all other erionite reported in the past 20 years from diverse rocks throughout the world which are described as prismatic or acicular in habit. The non-woolly erionites are especially common as microscopic crystals in diagenetically altered vitroclastic lacustrine deposits of Cenozoic age. The Reese River woolly erionite fills joints in gray to brownish-gray lacustrine mudstone of probably Pliocene age, in a zone about 1 m thick beneath a conspicuous gray vitric tuff. Compact masses of long, curly, woolly erionite fibers are in the plane of the joint and locally are associated with opal. Indices of refraction are ω = 1.468 and ε = 1.472; hexagonal unit-cell parameters are a = 13.186(2) Å, c = 15.055(1) Å, and V = 2267.1(0.9) Å 3 . A chemical analysis of woolly erionite yields a unit-cell composition of: Na 1.01 K 2.84 Mg 0.3 Ca 1.69 Al 8.18 Si 27.84 O 72 · 28.51H 2 O.

Clays and Clay Minerals↗
USGS2024

Harmotome in a basaltic, volcaniclastic sandstone from a lacustrine deposit near Kirkland Junction, Yavapai County, Arizona

Harmotome, probably the most common of the barium-rich zeolites, has been reported from a variety of metamorphic and igneous rocks throughout the world (Deer et al., 1963). Harmotome, however, seems to be a rare authigenic constituent in sedimentary rocks, and its most common occurrence apparently is in deep-sea sediments where its abundance is minor compared with that of phillipsite and clinoptilolite (Kastner and Stonecipher, 1978). The only previous reports of harmotome from lacustrine rocks are in oil shale of the Eocene Green River Formation in the Piceance Creek basin of Colorado and in silicic tufts of the Pliocene Big Sandy Formation near Wikieup, Arizona (Sheppard and Gude, 1971).

Clays and Clay Minerals↗
USGS1980

Chemistry of zeolites and zeolitic tuffs from a Pliocene lacustrine deposit near Durkee, Baker County, Oregon

Zeolites in an unnamed Pliocene lacustrine and fluviatile deposit near Durkee were first mentioned by Eakle (1898). He described a new zeolite, erionite, from a small opal quarry in a "rhyolite" (welded ash-flow tuff) about 6 km southeast of Durkee. Eakle, unfortunately, provided only a vague description of the type locality of erionite; and more than half a century passed before the type locality was rediscovered by L. W. Staples, and additional specimens were compared with Eakle's original material (Staples and Gard, 1959). Prior to the late 1950's, the Durkee locality was the only confirmed occurrence of erionite in the world. Our investigation of the zeolites and the diagenesis of tuffaceous rocks near Durkee began late in 1970 after a brief reconnaissance early in that year showed an abundance and variety of authigenic zeolites in silicic tuffs of the lacustrine deposit. Field studies continued intermittently until 1972, and laboratory studies continued intermittently until 1976. Preliminary findings have been published in two brief reports (Sheppard and Gude, 1975; Gude and Sheppard, 1978). This present report is concerned only with the chemistry of certain zeolitic tuffs from the Durkee deposit and with the chemistry of chabazite, clinoptilolite, and erionite that were separated from six of the tuffs.

Oregon↗
USGS1952

Uranium-bearing deposits west of Clancey, Jefferson County, Montana

Nine uranium deposits occur in a small area vest of Clancey,Jefferson County, Mont. These deposits are all in or near silicifiedfracture zones in quarts monsonite and related rocks of the Boulderbatholith. The deposits contain pockets of uranium minerals in cavities in brecciated silicified rock. The primary uranium mineral pitch-blende has been found in one pod. Secondary uranium minerals occur as fracture linings and in pore spaces in and adjacent to the silicified zones. Uranium in the Clancey district was deposited probably during oneof the later of at least four periods of silicification. The quartsmonsonite, rather than the younger alaskitic dike rocks, is the host rock of the deposits. Newmont Mining Corp. has leased the properties containing theuranium deposits and has begun development of one of these deposits.

Montana↗