... Indians near La Paz, Bolivia. These were examined and described by H. Fischer, E. Bamberger and H. Feussner. Prodgers who visited Bolivia in 1905-1906 makes the statement that the “Cura of Palca” told him that the early Jesuits had found “lapis lazuli” in the northern part of the Cerrania of Palca...

... belt are, first, the preponderance of volcanic rocks and, second, the great overall thicknesses. These characteristics are seen in the La Ligua area of coastal Chile ( Thomas, 1958 ). The Mesozoic sequence ranges from Late Triassic to Late Cretaceous in age, and its total stratigraphic thickness...

.... Branisa , 1960 , Geologia de Bolivia : Boliviano Inst. Petroleo , 245 p. Benavides , C. V. , 1962 , Estratigrafia pre-Terciaria de la region de Arequipa : Soc. Geol. Peru Bol. , v. 38 , p. 5 – 45 . Cecioni , G. O. , and F. García A. , 1960 , Stratigraphy of Coastal...

... a specimen of C. furcifera from Palca del Tunari near Cochabamba which probably has a middle to late Caradoc age ( Gagnier, 1993 ; Gagnier et al. 1996 ). Only the taxon C. rouaulti seems to be restricted to Lower Ordovician successions in Bolivia. Its rareness even within these strata, however...

.../Y, La/Yb, La/Sm, Sm/Yb, and Dy/Yb ratios, as well as in Sr-, Nd-, and Pb-isotopic ratios, to the crustal structure and evolution of the Central Andean orocline. In particular, the evolution of Dy/Yb and Sm/Yb ratios, which track the presence of the higher-pressure minerals amphibole and garnet...

... additional support for significant Cenozoic crustal thickening in the Central Andes. Geochemical proxies for crustal thickness (e.g., Sr/Y, La/Yb, La/Sm, Sm/Yb, and Dy/Yb) increase with time in these rocks, particularly between 30 Ma and today ( Mamani et al., 2010 ). The pattern of crustal thickening...

..... Clague, R.J. Fulton. Bl: Mineral Deposits of Vancouver Island. May 20-23. Mobarec, R. and Trolmg, B., 1994, Geologfa y recursos minerales de la Leaders: A. Panteleyev, C. Godwin, S.Juras, J. Fleming. caldera de Guacha: Sociedad Geo/6gica Bolivians, Memorias de/ XI Congreso Geo/6gico de Bolivia, pp. 351...

... the valley incision and uplift in Peru and Bolivia ( Schildgen et al . 2007 , 2009 , 2010 ; Thouret et al . 2007 ; Barnes & Ehlers 2009 ; Gunnell et al . 2010 ; De La Rupelle 2013 ). Fig. 1. Simplified geological map of SW Peru showing the extent of Tertiary volcanic deposits including...

... west of San Rafael ( Bateman, 1982 ), none has been shown to be of economic importance. The large and high-grade Palca 11 (Regina) ferberite-scheelite lode ( Clark et al., 1990a ; Yamamura, 1991 ), formerly mined in the eastern part of the broader Cordillera de Carabaya district, is coeval...

... and Palca XI tungsten deposits ( Clark et al., 1983 ; Kontak and Clark, 1988 ; Kontak et al., 1990 ). The peraluminous Tertiary granitic intrusions are thought to originate from deep-crustal partial melting of metasediments related to magmatic underplating ( Sandeman et al., 1995 ; Kontak and Clark, 2002...

...., Mineralization antarctic Macquarie Island. countries involving projects in 12 differ- at the Whitehorn Stock area, NE Salida, ent nations who requested a cumulative Colorado, U.S.A. Ramiro Gabriel Lopez, $1,700, total of US$193,000 in support. The Universidad Nacional de La Plata, quality of the vast majority...

... Richards, SEG Newsletter techni- Carolyn D. Anglin, Judith L. Hannah, and SEG participated in the International Ross L. Sherlock as Councilors. Separately, Mining Conference held in Chihuahua, cal editor. The active Universidad de la the Executive Committee appointed Mexico, April 27 30, with an informa...