A Late Proterozoic-Early Paleozoic magmatic cycle in Sierra de la Ventana, Argentina

被引：23
作者：
Gregori, DA
López, VL
Grecco, LE
机构：
[1] Univ Nacl Sur, CONICET, Dept Geol, RA-8000 Bahia Blanca, Buenos Aires, Argentina
[2] Univ Nacl Sur, Catedra Geol Argentina, RA-8000 Bahia Blanca, Buenos Aires, Argentina
[3] Univ Nacl Sur, Catedra Geoquim, RA-8000 Bahia Blanca, Buenos Aires, Argentina
来源：
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES | 2005年 / 19卷 / 02期
关键词：
Argentina; Late Proterozoic-Early Paleozoic magmatism; Sierra de la Ventana;
D O I：
10.1016/j.jsames.2004.10.007
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Late Proterozoic-Early Paleozoic intrusive and volcanic rocks of Sierra de la Ventana can be grouped into two magmatic assemblages: the Meyer and Cochenleufu suites. The older (700-570 Ma) is composed of S-type quartz-flionzodiorites, synogranites, and monzogranites associated with andesites and rhyolites and related to volcanic-arc and postcollisional settings. The younger (540-470 Ma) corresponds to highly fractionated homogeneous A-type monzogranites, linked to final plutonic events during postorogenic extension in collisional belts. Strong similarities between Sierra de la Ventana magmatic rocks and the S- and A-type granites of the Cape granite suite in South Africa allow positive correlation. In both areas, primitive volcanic, arcs or collisional orogens are recognized. Continuous transpressional shearing between the Swartland and Tygerberg terranes in the Saldania belt may have triggered the generation and emplacement of both suites. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：155 / 171
页数：17
相关论文
共 72 条
  • [1] Andreis R.R., 1989, Cuencas Sedimentarias Argentinas. Instituto Superior de Correlacion Geologica,, V6, P265
  • [2] ANDREIS RR, 1964, COM INVESTIG CIENTIF, V5, P79
  • [3] FROM OROGENIC TO ANOROGENIC SETTINGS - EVOLUTION OF GRANITOID SUITES AFTER A MAJOR OROGENESIS
    BONIN, B
    [J]. GEOLOGICAL JOURNAL, 1990, 25 (3-4) : 261 - 270
  • [4] BORELLO A, 1967, DUFAUR PROV BS AS NO, V2, P3
  • [5] BORRELLO AV, 1964, ANAL BUENOS AIRES, V12, P9
  • [6] BORRELLO AV, 1962, NOTAS COMISION INVES, V1, P4
  • [7] BUGGISCH W, 1987, ZENTRAL GEOL PALAO 1, V7, P9
  • [8] Cazeneuve H., 1967, Ameghiniana, V5, P3
  • [9] Chappell B., 1974, PAC GEOL, V8, P173, DOI DOI 10.1046/J.1440-0952.2001.00882.X
  • [10] Cingolani C.A., 1973, 5 C GEOL ARG BUEN AI, V1, P349
12345678