This study area provides a unique opportunity to study the intersection of the Elsinore and West Salton detachment faults in southern California, effusing warm springs, and alteration products in the midst of the fault intersection. The cooling history of lithosphere exposed in the footwalls to large-slip detachment faults associated with oceanic core complexes (OCCs) can be used to help establish depths of detachment faulting and gabbro emplacement in slow spreading ... Found inside – Page 5743However with decreasing age the tholeiitic basalts are increasingly enriched in incomformed as folds , and that the domal and basinal geometry of detachment faults may have formed patible elements ; therefore the sheild and postshield ... The region in west-central Nevada underlain by the Mina deflection, a belt of curved east-northeast and north-northwest high-angle faults linking the Eastern California Shear Zone and southern Walker Lane to the central Walker Lane, records ... Found inside – Page 96(1989, 1990a) and salient points only will be covered here. ... a low-angle detachment fault extending to depth from the bounding fault of the Esk Trough ... Found inside – Page 119While Buck's model is attractive because it explains the mechanical problems of initiating detachment faults as lowangled , it ... In order to generate low - angle faults it is necessary to find a mechanism which will cause rotation of the vertical ... Found inside – Page 65Silicification began with the deposition of massive white to light grey silica above the detachment fault partly or totally replacing the original rocks . Original ... of colloform silica layers in open space , can be traced from The Wall into the listric faults in the overlying sedimentary rocks ( Fig . ... Gold mineralization occurs as : ( 1 ) a massive , tabular body located immediately above the detachment fault ( Figs . Found inside – Page 255This slip transfer may occur on mapped structures such as the Mission , Las Trampas , and Bollinger faults , or it may occur on low - angle detachment faults at depth . In this scenario , the Concord fault is unrelated to the Calaveras fault , and ... The maximum strain direction, as determined from the orientation of the high-angle faults beneath the upper detachment, is east-west. This is consistent with kinematic indicators that give a WNW sense of movement on the detachment faults. Found inside – Page 2This explains the broad pattern of inverted or upside - down differentiation seen among olivine gabbros in Hole 735B ... The earliest stages of basaltic differentiation are not represented by any cumulates in Hole 735B , but those rocks may ... beneath the rift valley while the gabbros of Hole 735B were being unroofed and uplifted along detachment faults to the summit of the transverse ridge to the south . This is modeled as the result of the exhumation of middle-crustal rocks along crustal-scale detachment faults, resulting in the crossing of the ductile-to-brittle transition. Found inside – Page 183... CARBONATE ROCK AT DETACHMENT FAULTS , EASTERN BASIN AND RANGE , U.S. S.F.Diehl and R.E.Anderson ... This process may explain the rapid calcification of sponge tissue in modern marine microbialites and ancient sponge ... This is the eastern extent of the Cathedral Canyon detachment fault, which dives beneath the valley sediments of Miocene and Pliocene age. Found inside – Page 1226The present distribution of the Yellowstone River in northwestern Wy of the detachment fault masses is shown in oming ... In the discussion that follows it will composed mostly of blocks of Madison Lime be seen that in the Reef Creek area the ... Found inside – Page 36Large scale folds (5-10 km long) occur in conjunction with major normal faults in this region. ... Intersection of the detachment fault with the magma chambers might initiate magma ascent by, for example pressure release from uplift during ... Movement of crustal fluids along large faults is a crucial part of the formation of geothermal systems, ore and petroleum deposits, and is related permeability changes in and adjacent to the faults. Found inside – Page 49... of transport on the exposed detachment fault can be estimated by comparing rocks within the klippe in the Southern Foothills with those in the footwall . The upper - plate rocks can be closely matched to lower - plate rocks located 2 to 5 km to ... Found inside – Page 66Above the main detachment fault (s) are numerous moderate- to highangle, planar to listric normal faults. ... Exhumation would be especially facilitated if the main eastdipping low-angle detachment system utilized existing weak zones in the ... Found inside – Page 132A narrow band of highly foliated talc schists (white area) is seen on the bottom of the sample (sample 3873-1317); (b) Metasomatic ... other areas that may not directly be connected to the development of a major detachment fault system, but where ultramafic rocks are exposed on ... Although no detachment fault has yet been identified, emplacement of the Saldahna Massif has been attributed to complex ... Found inside – Page 66... wall of RAF are displaced by a high - angle fault ( Figure 3 ) that would extend to or cut the RAF detachment zone . ... rocks form the upper plate are in fault contact with the Aconchi granthat underlie Cerro El Vigía are not found in the eastern ... Found inside – Page 140the invoked detachment must have a regional significance, and it should be located at depth. However ... However, a flat basal detachment can also produce tilting of the hanging wall sequences, and the generation of fault systems and folds of ... Found inside – Page 142142-143 Low-angle normal faults and detachment hoaxes in SW Bulgaria Ivan Zagorchev Geological Institute, Bulgarian ... In many cases, low-angle normal faults may be demonstrated to be: (i) re-activated older thrust surfaces; (ii) rotated ... The structural evolution of low-angle normal faults (detachment faults) has been an extensively debated topic since the initial recognition of these structures throughout the western U.S. Cordillera and their subsequent identification ... Found inside – Page 128The Mid - Eocene ( 52 to 45 Ma ) W - dipping detachment faults , such as the Okanagan fault ( OF ) and Granby fault ( GF ) , are coeval with the syn - to post - tectonic Coryell intrusions . Extensional displacements along the Okanagan fault may ... Found inside – Page 51In recent years thero havo been number of attempts heap loaching dumps in the area which may have produced a few ... Their interpretation of the structure of the volcanic rocks may be the first published description of detachment fault ... Found inside – Page 77Requirements for initiation of detachment faults can be formulated as that the overall style of deformation is asymmetric and that strain is ... Supportive evidence for this mechanism was found from numerical experiments by Houseman et al . Found inside – Page 18Above the detachment ride broad synclines and cuspate anticlines in Atokan and Desmoinesian clastics and coals. Some thrusts may be reactivated listric normal faults. Some listric normal faults can still be seen under the detachment. Pseudotachylite, generated from frictional melt, is the only fault rock that forms exclusively during coseismic slip, providing a unique record of the dynamic processes that occur during earthquakes. Found inside – Page 3Manganese mineral deposits , although not clearly understood , are suspected to be related to detachment faults . ... are generating renewed interest in detachment - fault - related deposits and in areas where such deposits might be located . Found inside – Page 241Typically , extension estimates which the upper crust accommodates bulk stretching . obtained by analyzing faults on seismic reflection ... have only a limited resolution , linkage in such a manner must be that it approximates a and smaller faults will not be imaged . ... Commonly , slip onto discrete detachment faults is not the way in however , fault traces are offset from each other in an en échelon fashion . Found inside – Page 173With increasing displacement on the normal faults , this deformation will become concentrated into narrow zones or ... Transfer faults are essentially accommodation structures , which allow along - strike variations in the position , spacing and / or dip of the normal and detachment faults . ... identification of switches in polarity is straightforward , and the major transfer faults can be located as precisely as the ... Field investigations in the Buckskin, Whipple, Chemehuevi, Peter Kane, Santa Rosa, Copper, Castle Dome, Newberry, and other mountain ranges of the Mojave-Sonoran detachment terrane of southeastern California, western Arizona, and ... Found inside – Page 389In response to a centrally - located uplift zone , the gneissic rocks split radially and slide one upon the other , pushing aside and ... This period of strong uplift could , in part , be the product of a concealed granodiorite intrusive , the only evidence of which is indicated by the ... These detachment faults at the dome boundary are an essential structural element of core complexes of the Cordilleran type , and ... Found inside – Page 612There can , however , be little doubt that this magmatism would have advected significant heat to the Laurentian middle ... Another noteworthy similarity between the two cross - sections is the presence of important detachment faults above the ... Found inside – Page 11In the vicinity of Cape Surprise (84°30'S) near the Shackleton Glacier in the central TAM, two fault sets have been ... at least in part, along low-angle detachment faults and this mechanism may be responsible *Corresponding author (srmiller (a ... Found inside – Page 22Ductilly deformed rocks from deeper crustal levels were brought up along these detachment faults to be exposed at the surface . ... Metamorphic core complexes found throughout the Basin and Range ( Coney , 1980 ) , including the Monarch Canyon core complex in ... those in the Amargosa Chaos in Death Valley ( Wright and Troxel , 1984 ) , may be evidence of underlying detachment type faults . In contrast to previous studies suggesting that active low-angle normal faults predominantly creep aseismically, this work implies that the active Mai'iu low-angle normal fault slips in infrequent large earthquakes accompanied by some ... Found inside – Page 44An active fault can be defined as one that has moved in the recent past and may move again within a time span that is ... of geologic structures in western Taiwan are related to gravity tectonics and that most of the faults are detachment faults ... This book is intended primarily for students and practitioners of structural geology. Found inside – Page 56I The detachment fault is sporadically exposed through the gravels 0.1 to 1 kilometer west of the district ( Figure 11 ) . ... and listric faults may be the result of large - scale drag folding along the detachment fault , such as describe elsewhere ... Found inside – Page 124Recent study of detachment faults in the southwestern U.S. reveals major Tertiary crustal extension , in part on reactivated Mesozoic thrusts . This type of extensional tectonics may be a previously unrecognized major phase of continental ... Found inside – Page 35Late middle Miocene detachment faults are a primary structural feature that have been postulated to the west in the ... underlain by very low angle faults above a great thickness of Miocene marine sediments . implying that the block could have ... Desmoinesian clastics and coals mineralization occurs as: ( 1 ) a massive, tabular located. Cause rotation of the vertical might initiate magma ascent by, for example pressure release from uplift...! The upper plate are in fault contact with the Aconchi granthat underlie Cerro El Vigía are not in! To be exposed at the surface 's model is attractive because it the... 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