collapse breccia

collapse breccia

[kə′laps ‚brech·ə]
(geology)
Angular rock fragments derived from the collapse of rock overlying a hollow space.
References in periodicals archive ?
The 2013 core drilling suggests that the tabular zones of mineralized, favourable host rock are cut by one or more high-angle structures causing collapse breccia zones where the mineralization becomes thicker and higher-grade.
13-11 and 13-08 confirm continuity of high-grade gold in the extensive, lower, flat-tabular, collapse breccia body; which is analogous host material for many large Carlin-style deposits.
Seventy-two soil samples were collected to help delineate the extension of the collapse breccia zones on the Golden Snow Project.
Collapse breccia: A collapse breccia forms where there has been a
This breccia is presumed to be similar to photos of some core samples from the earlier holes shown on our web site under "Photo Gallery & Maps/ Drill Core from Collapse Breccia Pipes.
This lower breccia, which is comprised dominantly of collapse breccia, is the preferred depositional environment for gold and the intercept in 13-08 is essentially open in all directions.
hosted predominantly within the apatite-martite collapse breccia facies.
The Ogee zone occurs in a decalcified limestone-siltstone collapse breccia within the lower member of the Ordovician Comus Formation (the principal host rock for mineralization at Pinson).
Photos of some core samples from these holes are shown on our web site under "Photo Gallery & Maps/ Drill Core from Collapse Breccia Pipes.
Significant intervals of bleaching, alteration, disseminated and vein iron pyrite and a five foot interval of collapse breccia, with fine disseminated iron pyrite in the matrix, were encountered.
This drill is designed so that a true vertical hole can be drilled through the cobbles and boulders of the three targeted uranium bearing collapse breccia pipes without significant deviation.
The Elle and Hermina Pipes have been defined by interpretation of circular features and down warped beds related to collapse breccia pipes and have interpreted sulfide minerals associated with them, indicated by electrical geophysical surveys starting at a depth of about 250 meters (825 feet).