GeoKhan Academy

Hello, readers. Here's a brief account on Kimberlite.  Kimberlite is a rare, ultramafic volcanic rock that is known for its association with diamond deposits.  Composition: It is typically composed of olivine, phlogopite, serpentine, and other minerals, and is often rich in mantle-derived xenoliths. Properties: Kimberlite eruptions are extremely explosive and can produce steep-sided, cone-shaped volcanic landforms known as kimberlite pipes. These pipes can reach depths of several hundred meters and can be several hectares in size. Kimberlite pipes are the primary source of commercial diamond deposits, as diamonds are often found within the rock itself or in the surrounding alluvial deposits. The presence of diamonds in kimberlite pipes is believed to be the result of the rapid ascent and cooling of magma, which traps and preserves the diamonds before they can be destroyed. Kimberlite is a type of ultramafic volcanic rock that is typically associated with diamond deposits. The...

 Hey, guys, Welcome. We are very pleased to inform you that compiled, reviewed and created PROVISIONAL ANSWER KEY for the COMBINED GEO-SCIENTIST EXAM PRE (GEOLOGY) 2021. Follow the link to check the answer key, now: ANSWER KEY Although, utmost care has been taken while preparing this answer key, this is still a provisional answer key and only UPSC will be uploading the official key. Thanks!

what are the heavy minerals?  Heavy minerals: are those which have specific gravity greater than quartz and feldspar. the specific gravity of quartz is about 2.65 and for feldspar t varies in between 2.50 to 2.78. (specific gravity can be calculated by taking the ratio of absolute density of the mineral and absolute density of water at 4*C.) heavy minerals also defined for practical purposes as all those minerals having specific gravity greater than that of Bromoform, which have specific gravity 2.87 at 20*C. bromoform is a brominated organic solvent. stability of heavy minerals;  least stable : barite, augite, apatite, olivine etc. most stable : zircon, tourmaline, rutile, garnet.  Heavy minerals are useful in determination of provenance. before going into the details of how heavy minerals are used to determine the nature of provenance, lets get a brief idea of provenance. provenance: the literal meaning of the this word is "to origin from ",...

Hey guys, welcome. We are very pleased to inform you that our team has compiled, reviewed and created Provisional Answer Keys for the 'Combined Geo-Scientist (P) Examination 2020 Question Papers'. Follow the links to download the answer keys. Paper 1: Paper 1 Answer Key Paper 2: Paper 2 Answer Key Although, utmost care has been taken while preparing these answer keys, these are still provisional and only UPSC will be releasing the official answer keys. For further info, subscribe to our YouTube channel. Thanks.

Hey guys, welcome back. As the examination of 'Combined Geo-Scientist (P) Examination 2020' has commenced, follow the links to access or download the question papers of the examination. Paper 1: Paper 1 Paper 2: Paper 2 Follow and subscribe to our Youtube channel for info on the same and more. Thanks.

Hey guys, here's a link for you to Geo Khan Exclusive Study Material on Palaeontology. The material has been prepared by Geo Khan via keen observation and selective material from very authentic books on the subject. Follow the link to access the file: Palaeontology. Thanks for visiting the website and stay tuned for much more. Meanwhile, subscribe to our YouTube channel for more on Geology. Peace out. 

Hello, people. Here's the Geo Khan Exclusive Answer Key for Assistant HydroGeologist Exam 20.10.2019. Follow the link to access the file: Answer Key Visit this site for more information about the paper and about geology in general. Thanks.