期刊
JOURNAL OF THE GEOLOGICAL SOCIETY
卷 166, 期 -, 页码 447-458出版社
GEOLOGICAL SOC PUBL HOUSE
DOI: 10.1144/0016-76492008-091
关键词
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资金
- Spanish Ministry of Science and Education [CGL-2006-0884]
- Generalitat Valenciana regional government [GV06/169, GV/2007/143]
- Alicante University [GRJ06-08, VIGROB053]
- Naples University [Cofin/2004-2004041440]
Evidence is presented for Triassic rift-related paleo-structures from the Alpujarride Complex carbonates of the Betic Cordillera, SE Spain. Direct evidence of synsedimentary extensional tectonics is provided by macro- to meso-scale normal faults overstepped by younger strata. Most faults define domino-like horst and graben structures. The faults are associated with an expanded synrift sedimentary prism in which soft-sediment deformation, gravity-flow deposits and unconformities are widely developed. Syntectonic mafic igneous intrusions also occur. The age of this phase of extension is constrained as Ladinian-Carnian (c. 237-216 Ma) From a paleogeographical standpoint, the thick Triassic carbonates of the Betic Internal Zone. together with comparable successions in Northern Calabria (Southern Apennines), occupied a belt with elevated subsidence connecting the Neo-Tethys to the east with the eastern North American intracontinental rift system to the west. Their carbonate facies, intermediate between classical Alpine- and Germanic-type Triassic facies, recorded the main episodes of rifting affecting Central Pangaea.
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