Eppawala carbonatite intrusive complex: apatite crystal extraction and fluorite mineralization?
What structural igneous processes formed the chlor-fluorapatite crystals hosted within Precambrian dolomitic carbonatite intrusions at Eppawala?
More
3 Answers from travellers
The Eppawala phosphate deposit in Anuradhapura is a rare Proterozoic carbonatite body intruded along shear fractures into the high-grade Wanni Complex basement. The deposit formed via magmatic carbonate melts enriched in phosphorus, fluorine, and rare-earth elements. The parent rock comprises a coarse matrix of calcite and dolomite hosting euhedral, hexagonal chlor-fluorapatite crystals up to 30cm long. Tropical weathering leached out the soluble carbonate matrix over millions of years, leaving behind a residual leached mantle of insoluble, high-grade phosphate rock mined for agricultural fertilizer.
Specimens frequently feature deep greenish-yellow apatite prisms embedded with dark purple fluorite, magnetite, and accessory zircon crystals.
Eppawala apatite displays moderate solubility in organic citric acid solutions, making crushed rock powder suitable for direct application to acidic tea soils.
You must be logged in to post an answer.
Log In to AnswerRelated questions
- Wildlife parks in Sri Lanka beyond Yala - Wilpattu, Minneriya, Udawalawe - which is worth visiting?2 answers
- Kandy Esala Perahera - when does it happen, where are the best viewing spots, and how do I get seats?2 answers
- Arugam Bay vs Weligama for intermediate surfing - which should I choose and why?2 answers
- Best local food to eat in Colombo - where do locals actually eat and what should I try?2 answers
- How cheap can you realistically travel Sri Lanka on a shoestring - $25-30 USD per day?2 answers
- Ayurveda retreat in Sri Lanka - what to expect and how to find genuine treatment vs tourist trap?2 answers
Join a Crew
Kandy Perahera Live Tonight
Perahera Seats, Hotels & Roads
Dalada & Perahera Culture