Doebrich j l (22 risultati)

Condizione: New.

Paperback or Softback. Condizione: New. Resource Assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California: Geol. Book.

Condizione: As New. Unread book in perfect condition.

Condizione: New.

Condizione: New.

Condizione: As New. Unread book in perfect condition.

Condizione: New.

Condizione: As New. Unread book in perfect condition.

Condizione: As New. Unread book in perfect condition.

CD-Rom in paper sleeve. Condizione: very good. This report presents results of a study conducted between 1992 and 1996 to assess the undiscovered metallic mineral resources in the U.S. Bureau of Land Management's (BLM) Winnemucca District and Surprise Resource Area (WSRA), northwest Nevada and northeast California. A wide variety of mineral deposits are present throughout the WSRA, and they are hosted by rocks and surficial deposits ranging in age from lower Paleozoic to Quaternary that is, from approximately 570 million years (Ma) to about 1 Ma. The main metal commodities present in the WSRA, from a commercial standpoint, are gold, silver, and, to a lesser extent, tungsten. Gold currently accounts for most mining activities in the WSRA production of approximately 1.2 million oz Au occurred from 10 mines during 1995. Eight of these 10 mines also produced approximately 7.4 million oz Ag for a combined annual gross value of approximately $550 million. Gold in the WSRA is produced mostly from three types of deposits: (1) sediment-hosted (Carlin-type) deposits, (2) hotspring and vein-type epithermal gold-silver deposits, and (3) distal-disseminated silver-gold deposits. Some additional gold and silver production also is derived from a variety of less important types of mineral deposits, including minor production from placers.CD.…

Condizione: New.

Condizione: New.

Softcover. Condizione: Good+. Unmarked, fading from sun on edges. Minor wear or bumping of corners. ; Book Description; Spine of the book has no signs of creasing. Pages are clean and not marred by notes or folds. Covers are square and with minor wear. Map in pocket. ; USGS OF-04-32; Textbook; B&W Illustrations; 4to 11" - 13" tall; 33 pages DN2.…

Softcover. Condizione: Very Good. Unmarked. Minor bumping of corners. ; Book Description; Spine of the book has no signs of creasing. Pages are clean and not marred by notes or folds. Covers are square and with minor wear. Maps and fold-outs included in back pocket. ; Technical Record USGS TR-08-1; Textbook; B&W Illustrations; 4to 11" - 13" tall; 40 pages DN2. …

Condizione: very good. study conducted from 1992-1996 to assess the undiscovered metallic mineral resources DR5. spiral comb, cover clean, binding vey good, pages clean, 147 pages, foldout map in rear cover.

Condizione: very good. study conducted from 1992-1996 to assess the undiscovered metallic mineral resources. spiral comb, cover clean, binding vey good, pages clean, 147 pages, foldout map in rear cover.

Condizione: New. Print on Demand pp. 36.

Condizione: New. Print on Demand pp. 52.

Condizione: New. Print on Demand pp. 36.

Condizione: New. Print on Demand pp. 52.

Condizione: New. PRINT ON DEMAND pp. 36.

Condizione: New. PRINT ON DEMAND pp. 52.