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Non-marine Carbonate (Joint/Dike) Filling In The Injana Formation, Kand Anticline, NE-Iraq | ||
| Rafidain Journal of Science | ||
| Article 1, Volume 16, Issue 5, 2005, Pages 69-79 PDF (0 K) | ||
| DOI: 10.33899/rjs.2005.42257 | ||
| Author | ||
| Mumtaz A. Amin | ||
| Abstract | ||
| Riparian clastic beds of fluvial origin in the Injana Formation (Upper Miocene) of Kand anticline exhibit the development of a vertical joint/dike like structure in host sandstone overlying red mudstone. These structures indicate filling from above with sandy carbonate showing texture of floating clastic grains in a micritic calcite stained with red iron oxide pigment. This is capped by siltstone-very fine sandstone enriched with iron oxide and preserved diatom vestiges as chert spheroids; accompanied by oval-irregular vugs lined with microcrystalline calcite. These beds are topped by fossil-barren micritic carbonate of intraclastic texture. The clastic-carbonate package is interpreted as non-marine fluvial-lacustrine deposits of interchannel depression (pond-lake). Episodic exposure with incipient plant root penetrations, desiccation and differential compaction have led to fissure cracking; otherwise tectonic jointing is entailed. A terminal stage of enlargement by descending water was conducive to the genesis of these joint/dike structures which were filled later by reworked, reshaped and modified sediments sourced from juxtaposed-nearby areas. | ||
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