The Bangweulu Block is a cratonic unit that forms part of the Congo craton of central Africa. The Bangweulu Block however consists of Palaeoproterozoic granitoids and volcanics , and is overlain by a Palaeoproterozoic continental sedimentary succession , the Mporokoso Group , and does not preserve much direct evidence of Archaean protoliths .
4-649: Indirect evidence of an Archaean ancestry for the Bangweulu Block is provided by detrital zircons within the Mporokoso Group, which indicate a local source area with zircons of 3.2, 3.0. 2.7 and 2.5 Ga, but more importantly, by xenocrystic zircon found in volcanic and granitic lithologies of the Bangweulu Block, and the area to the West, the Central African Copperbelt (Rainaud et al., 2003). This indicates
8-656: Is particles of rock derived from pre-existing rock through weathering and erosion . A fragment of detritus is called a clast . Detrital particles can consist of lithic fragments (particles of recognisable rock), or of monomineralic fragments (mineral grains). These particles are often transported through sedimentary processes into depositional systems such as riverbeds, lakes or the ocean, forming sedimentary successions. Diagenetic processes can transform these sediments into rock through cementation and lithification , forming sedimentary rocks such as sandstone. These rocks can then in turn again be weathered and eroded to form
12-718: The Mporokoso Group, the Kasama Formation , the Luitikila and Luapula Beds , and Cenozoic alluvium from the Chambeshi River and the Kalungu, Lower Chambeshi and Lake Bangweulu Basins . This plate tectonics article is a stub . You can help Misplaced Pages by expanding it . This African location article is a stub . You can help Misplaced Pages by expanding it . Detrital Detritus ( / d ə ˈ t r aɪ t ə s / ; adj. detrital / d ə ˈ t r aɪ t əl / )
16-795: The presence of a ca . 3.2 Ga terrane called the Likasi Terrane . The Bangweulu Block is bordered on the west by the Kundelungu Plateau, on the southwest by the Lufilian Arc , on the southeast by the Kibaran Irumide Belt , and on the northeast by the Ubendian Belt. The block was formed during the Eburnian orogeny , with the crystalline basement dated at 1,835 Ma , implying last Eburnian magmatism . Post-Eburnian sediments include
#640359